Merge pull request 'Ledger follow-ups from the shape audit (milestone 294: #2868–#2874)' (#122) from dev into main

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

alembic/versions/0080_code_shape_proposals.py

@@ -0,0 +1,54 @@
+"""Shape fingerprints + the mechanical proposer's columns (#2792, milestone 294)
+
+Revision ID: 0080
+Revises: 0079
+Create Date: 2026-08-21
+
+Two additions to the ledger. `signature` / `body_sha` fingerprint each shape
+(definition line + a whitespace/comment-insensitive hash of its block) so the
+proposer can match on content and a later drift recheck can notice change,
+without the ledger ever storing code. The proposal columns carry the
+proposer's standing suggestion for an unclassified row — instance-of-#N with
+a basis and score, or a derive-first group key — and `proposed_sha`
+remembers the content it was judged at so a refresh re-examines only what
+changed. Mechanical and recomputable: a restore that lacks them loses
+nothing the next refresh does not rebuild.
+"""
+import sqlalchemy as sa
+from alembic import op
+
+revision = "0080"
+down_revision = "0079"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("code_shapes", sa.Column("signature", sa.Text(), nullable=False, server_default=""))
+    op.add_column("code_shapes", sa.Column("body_sha", sa.Text(), nullable=False, server_default=""))
+    op.add_column(
+        "code_shapes",
+        sa.Column(
+            "proposed_snippet_id",
+            sa.BigInteger(),
+            sa.ForeignKey("notes.id", ondelete="SET NULL"),
+            nullable=True,
+        ),
+    )
+    op.add_column("code_shapes", sa.Column("proposal_basis", sa.Text(), nullable=True))
+    op.add_column("code_shapes", sa.Column("proposal_score", sa.Float(), nullable=True))
+    op.add_column("code_shapes", sa.Column("proposal_group", sa.Text(), nullable=True))
+    op.add_column("code_shapes", sa.Column("proposed_at", sa.DateTime(timezone=True), nullable=True))
+    op.add_column("code_shapes", sa.Column("proposed_sha", sa.Text(), nullable=False, server_default=""))
+    op.create_index(
+        "ix_code_shapes_proposed", "code_shapes", ["project_id", "proposed_snippet_id"]
+    )
+
+
+def downgrade() -> None:
+    op.drop_index("ix_code_shapes_proposed", table_name="code_shapes")
+    for col in (
+        "proposed_sha", "proposed_at", "proposal_group", "proposal_score",
+        "proposal_basis", "proposed_snippet_id", "body_sha", "signature",
+    ):
+        op.drop_column("code_shapes", col)

alembic/versions/0081_shape_history_and_divergence.py

@@ -0,0 +1,70 @@
+"""Shape history, recheck, and the divergence flag (#2793, milestone 294)
+
+Revision ID: 0081
+Revises: 0080
+Create Date: 2026-08-21
+
+The payoff surface of the ledger. `classified_sha` remembers the fingerprint
+a judgment was made at so a later body change under an instance/variant can
+flag `recheck_at`; `diverges_from` is the button-B flag (a shape new since
+the previous refresh, where one canon dominates its directory+kind, and not
+proposed as that canon). `code_shape_events` is the what-was-used-when
+record: every classification, vanish, reappearance, and drift as it
+happened — history the row alone cannot keep once it moves on.
+"""
+import sqlalchemy as sa
+from alembic import op
+
+revision = "0081"
+down_revision = "0080"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("code_shapes", sa.Column("classified_sha", sa.Text(), nullable=False, server_default=""))
+    op.add_column("code_shapes", sa.Column("recheck_at", sa.DateTime(timezone=True), nullable=True))
+    op.add_column(
+        "code_shapes",
+        sa.Column(
+            "diverges_from",
+            sa.BigInteger(),
+            sa.ForeignKey("notes.id", ondelete="SET NULL"),
+            nullable=True,
+        ),
+    )
+    op.create_index("ix_code_shapes_diverges", "code_shapes", ["project_id", "diverges_from"])
+    op.create_table(
+        "code_shape_events",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column(
+            "shape_id",
+            sa.Integer(),
+            sa.ForeignKey("code_shapes.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column("project_id", sa.Integer(), nullable=False),
+        sa.Column("path", sa.Text(), nullable=False),
+        sa.Column("symbol", sa.Text(), nullable=False),
+        sa.Column("kind", sa.Text(), nullable=False),
+        sa.Column("event", sa.Text(), nullable=False),
+        sa.Column("status", sa.Text(), nullable=True),
+        sa.Column("snippet_id", sa.BigInteger(), nullable=True),
+        sa.Column("classified_by", sa.Text(), nullable=True),
+        sa.Column("reason", sa.Text(), nullable=True),
+        sa.Column("commit", sa.Text(), nullable=False, server_default=""),
+        sa.Column("at", sa.DateTime(timezone=True), nullable=False),
+    )
+    op.create_index("ix_code_shape_events_shape", "code_shape_events", ["shape_id", "at"])
+    op.create_index(
+        "ix_code_shape_events_project_path", "code_shape_events", ["project_id", "path"]
+    )
+
+
+def downgrade() -> None:
+    op.drop_index("ix_code_shape_events_project_path", table_name="code_shape_events")
+    op.drop_index("ix_code_shape_events_shape", table_name="code_shape_events")
+    op.drop_table("code_shape_events")
+    op.drop_index("ix_code_shapes_diverges", table_name="code_shapes")
+    for col in ("diverges_from", "recheck_at", "classified_sha"):
+        op.drop_column("code_shapes", col)

alembic/versions/0082_repo_binding_ref.py

@@ -0,0 +1,26 @@
+"""Per-binding ref — the branch a project's ledger follows (#2873, milestone 294)
+
+Revision ID: 0082
+Revises: 0081
+Create Date: 2026-08-21
+
+A repo binding used to imply the repo's default branch; the shape ledger
+therefore only saw work after a merge to main, while the operator's work
+lands on dev (rule 1). `ref` names the branch the coverage refresh reads —
+NULL keeps today's behaviour (the forge's default branch).
+"""
+import sqlalchemy as sa
+from alembic import op
+
+revision = "0082"
+down_revision = "0081"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("repo_bindings", sa.Column("ref", sa.Text(), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("repo_bindings", "ref")

alembic/versions/0083_code_shape_reason_code.py

@@ -0,0 +1,26 @@
+"""Exempt/variant reason codes — a small fixed catalogue beside the prose (#2874, milestone 294)
+
+Revision ID: 0083
+Revises: 0082
+Create Date: 2026-08-21
+
+The 2026-08 audit wrote the same free-text reason thousands of times
+("scoped rule — styles one element of this view"); a judgment's WHY stays
+prose, but an optional code from a fixed catalogue makes the ledger
+filterable and aggregable ("how many pure helpers, how many test helpers").
+"""
+import sqlalchemy as sa
+from alembic import op
+
+revision = "0083"
+down_revision = "0082"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("code_shapes", sa.Column("reason_code", sa.Text(), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("code_shapes", "reason_code")

alembic/versions/0084_code_shape_uses.py

@@ -0,0 +1,40 @@
+"""code_shape_uses — consumption edges, separate from conformance (#2870, milestone 294)
+
+Revision ID: 0084
+Revises: 0083
+Create Date: 2026-08-21
+
+A ledger row carries ONE snippet_id: what shape this is (instance/variant of
+a canon). But a shape can also CALL several canonical helpers — a service
+function that is an instance of the service-function convention and a
+consumer of hash_token. The 2026-08 audit had to pick one; hook evidence
+("pulled #N then wrote code referencing it") was stamped as instance when it
+is a uses fact. This table holds the many-valued relation: shape → snippet,
+with the basis and the evidence. Cascades with the shape and the snippet.
+"""
+import sqlalchemy as sa
+from alembic import op
+
+revision = "0084"
+down_revision = "0083"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "code_shape_uses",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("shape_id", sa.Integer(), sa.ForeignKey("code_shapes.id", ondelete="CASCADE"), nullable=False),
+        sa.Column("snippet_id", sa.Integer(), sa.ForeignKey("notes.id", ondelete="CASCADE"), nullable=False),
+        sa.Column("basis", sa.Text(), nullable=False),
+        sa.Column("evidence", sa.Text(), nullable=True),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.text("now()")),
+        sa.UniqueConstraint("shape_id", "snippet_id", name="uq_code_shape_uses_shape_snippet"),
+    )
+    op.create_index("ix_code_shape_uses_snippet", "code_shape_uses", ["snippet_id"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_code_shape_uses_snippet", table_name="code_shape_uses")
+    op.drop_table("code_shape_uses")

frontend/src/api/client.ts

@@ -38,6 +38,20 @@ async function handleResponse<T>(res: Response, path: string): Promise<T> {
   return res.json() as Promise<T>;
 }
 
+/**
+ * The server's `{"error": "..."}` message from a failed call, or `fallback`
+ * when the failure carried none (network error, non-JSON body). The one place
+ * the error envelope is unpacked on the client — views used to restate this
+ * as a six-line `"body" in e` branch at every catch site.
+ */
+export function apiErrorMessage(e: unknown, fallback: string): string {
+  if (e && typeof e === "object" && "body" in e) {
+    const body = (e as { body?: { error?: unknown } }).body;
+    if (body && typeof body.error === "string" && body.error) return body.error;
+  }
+  return fallback;
+}
+
 export async function apiGet<T>(path: string): Promise<T> {
   const res = await fetch(path);
   return handleResponse<T>(res, path);

frontend/src/assets/auth-shared.css

@@ -0,0 +1,115 @@
+/* ── Auth surface (Login / Register / RegisterInvite / ForgotPassword / ResetPassword) ──
+   The five auth views used to carry byte-identical copies of these rules in
+   their scoped blocks (2026-08 shape audit). Loaded per view with
+   <style src="@/assets/auth-shared.css" />, like editor-shared.css; the form
+   rules are scoped under .auth-card so nothing leaks into the app's other
+   .field/.input usages. Per-view one-offs (Login's .divider/.forgot-link)
+   stay in the view. */
+.auth-page {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 100vh;
+  padding: 1rem;
+}
+.auth-card {
+  width: 100%;
+  max-width: 400px;
+  background: var(--fs-surface-raised);
+  border: 1px solid var(--fs-border-color);
+  border-radius: var(--fs-radius-lg);
+  padding: 2rem;
+}
+.auth-brand {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.5rem;
+  margin-bottom: 1.5rem;
+}
+.auth-card h1 {
+  margin: 0;
+  text-align: center;
+}
+.auth-hint {
+  text-align: center;
+  font-size: 0.9rem;
+  color: var(--fs-text-secondary);
+  margin-bottom: 1rem;
+}
+.auth-hint a {
+  color: var(--fs-accent);
+}
+/* A centred status paragraph block: registration closed, invalid/expired
+   token, "check your inbox". One rule — the views used to name it
+   .closed-msg / .error-block / .success-msg with identical bodies. */
+.auth-note {
+  text-align: center;
+  color: var(--fs-text-secondary);
+  font-size: 0.95rem;
+  padding: 0.5rem 0;
+}
+.auth-note p {
+  margin: 0.5rem 0;
+}
+.auth-loading {
+  text-align: center;
+  color: var(--fs-text-tertiary);
+  font-size: 0.95rem;
+  padding: 1rem 0;
+}
+.auth-card .field {
+  margin-bottom: 1rem;
+}
+.auth-card .field label {
+  display: block;
+  font-size: 0.9rem;
+  font-weight: 600;
+  margin-bottom: 0.35rem;
+}
+.auth-card .input {
+  width: 100%;
+  padding: 0.5rem 0.75rem;
+  border: 1px solid var(--fs-border-color);
+  border-radius: var(--fs-radius-sm);
+  font-size: 0.95rem;
+  background: var(--fs-surface-page);
+  color: var(--fs-text-primary);
+  box-sizing: border-box;
+}
+.auth-card .input:focus {
+  outline: none;
+  border-color: var(--fs-accent);
+}
+.auth-card .input:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+.auth-card .input-error,
+.auth-card .input-error:focus {
+  border-color: var(--fs-error);
+}
+.auth-card .field-hint {
+  margin: 0.35rem 0 0;
+  font-size: 0.8rem;
+  color: var(--fs-text-tertiary);
+}
+.auth-card .error-hint {
+  margin: 0.35rem 0 0;
+  font-size: 0.8rem;
+  color: var(--fs-error);
+}
+.auth-card .error-msg {
+  color: var(--fs-error);
+  font-size: 0.9rem;
+  margin: 0 0 0.75rem;
+}
+.auth-footer {
+  text-align: center;
+  font-size: 0.9rem;
+  color: var(--fs-text-secondary);
+  margin: 1rem 0 0;
+}
+.auth-footer a {
+  color: var(--fs-accent);
+}

frontend/src/assets/components.css

@@ -221,3 +221,79 @@
                                                      is the page's main action */
   font-size: var(--fs-size-body-sm);
 }
+
+
+/* ── Modal ─────────────────────────────────────────────────────────────────
+   The one overlay/card/button shape for every in-app dialog (ConfirmDialog,
+   the create-project / merge-snippet / systems dialogs, the editors' confirm
+   prompts). Global on purpose: ConfirmDialog teleports to <body> and has no
+   styles of its own, so these must be loaded with the app, not with whichever
+   view happens to be open. Views add only their own overrides (a wider card,
+   a form layout). Destructive = action-destructive per the Hybrid rule. */
+.modal-overlay {
+  position: fixed;
+  inset: 0;
+  background: var(--fs-overlay);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 200;
+}
+.modal-card {
+  background: var(--fs-surface-raised);
+  border: 1px solid var(--fs-border-color);
+  border-radius: var(--fs-radius-lg);
+  padding: 1.5rem;
+  width: 100%;
+  max-width: 400px;
+  box-shadow: 0 8px 32px var(--color-shadow);
+}
+.modal-title {
+  margin: 0 0 0.75rem;
+  font-size: 1.05rem;
+}
+.modal-message {
+  font-size: 0.9rem;
+  color: var(--fs-text-secondary);
+  margin: 0 0 1.25rem;
+  line-height: 1.5;
+}
+.modal-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 0.5rem;
+}
+.modal-btn {
+  padding: 0.4rem 0.9rem;
+  border: 1px solid var(--fs-border-color);
+  background: var(--fs-surface-raised);
+  color: var(--fs-text-primary);
+  border-radius: var(--fs-radius-sm);
+  cursor: pointer;
+  font-size: 0.875rem;
+  font-family: inherit;
+}
+.modal-btn:hover {
+  background: var(--fs-surface-page);
+}
+.modal-btn-primary {
+  background: var(--fs-action-primary);
+  border-color: var(--fs-action-primary);
+  color: var(--fs-text-on-action);
+}
+.modal-btn-primary:hover:not(:disabled) {
+  background: var(--fs-action-primary-hover);
+}
+.modal-btn-primary:disabled {
+  opacity: 0.5;
+  cursor: default;
+}
+.modal-btn-danger {
+  background: var(--fs-action-destructive);
+  border-color: var(--fs-action-destructive);
+  color: var(--fs-text-on-action);
+}
+.modal-btn-danger:hover {
+  background: var(--fs-action-destructive-hover);
+  border-color: var(--fs-action-destructive-hover);
+}

frontend/src/assets/editor-shared.css

@@ -316,53 +316,6 @@
   gap: 0.5rem;
 }
 
-/* ── Modal ── */
-.modal-overlay {
-  position: fixed;
-  inset: 0;
-  background: var(--fs-overlay);
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  z-index: 200;
-}
-.modal-card {
-  background: var(--fs-surface-raised);
-  border-radius: var(--fs-radius-lg);
-  padding: 1.5rem;
-  max-width: 400px;
-  width: 90%;
-  box-shadow: 0 8px 32px var(--color-shadow);
-}
-.modal-title {
-  margin: 0 0 0.5rem;
-  font-size: 1.1rem;
-}
-.modal-message {
-  margin: 0 0 1.25rem;
-  color: var(--fs-text-secondary);
-  font-size: 0.95rem;
-}
-.modal-actions {
-  display: flex;
-  gap: 0.5rem;
-  justify-content: flex-end;
-}
-.modal-btn {
-  padding: 0.45rem 1rem;
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-sm);
-  background: var(--fs-surface-raised);
-  color: var(--fs-text-primary);
-  cursor: pointer;
-  font-size: 0.9rem;
-}
-.modal-btn-danger {
-  background: var(--fs-error);
-  color: var(--fs-text-on-action);
-  border-color: var(--fs-error);
-}
-
 /* ── Floating inline assist button (teleported to body) ── */
 .inline-assist-btn {
   position: fixed;

frontend/src/components/HistoryPanel.vue

@@ -3,6 +3,7 @@ import { ref, computed, onMounted } from "vue";
 import { apiGet, pinNoteVersion, unpinNoteVersion } from "@/api/client";
 import DiffView from "@/components/DiffView.vue";
 import type { DiffLine } from "@/composables/useAssist";
+import { fmtStamp } from "@/utils/dateFormat";
 
 interface NoteVersion {
   id: number;
@@ -56,14 +57,6 @@ const diff = computed<DiffLine[]>(() => {
   return result;
 });
 
-function formatDate(iso: string): string {
-  const d = new Date(iso);
-  return d.toLocaleString(undefined, {
-    month: 'short', day: 'numeric', year: 'numeric',
-    hour: '2-digit', minute: '2-digit',
-  });
-}
-
 async function loadVersions() {
   loading.value = true;
   try {
@@ -212,7 +205,7 @@ onMounted(loadVersions);
                 v-if="v.pin_kind === 'manual' && v.pin_label"
                 class="history-item-label"
               >{{ v.pin_label }}</div>
-              <div class="history-item-date">{{ formatDate(v.created_at) }}</div>
+              <div class="history-item-date">{{ fmtStamp(v.created_at) }}</div>
             </div>
           </div>
 

frontend/src/components/SystemsSection.vue

@@ -515,36 +515,4 @@ async function confirmDelete() {
 }
 .skel-row--short { width: 65%; }
 
-/* ── Modal ────────────────────────────────────────────────────── */
-.modal-overlay {
-  position: fixed; inset: 0;
-  background: var(--fs-overlay);
-  display: flex; align-items: center; justify-content: center;
-  z-index: 200;
-}
-.modal-card {
-  background: var(--fs-surface-raised);
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-lg);
-  padding: 1.5rem;
-  width: 100%;
-  max-width: 400px;
-  box-shadow: 0 8px 32px var(--color-shadow);
-}
-.modal-title { margin: 0 0 0.75rem; font-size: 1.05rem; }
-.modal-message { font-size: 0.9rem; color: var(--fs-text-secondary); margin: 0 0 1.25rem; line-height: 1.5; }
-.modal-actions { display: flex; justify-content: flex-end; gap: 0.5rem; }
-.modal-btn {
-  padding: 0.4rem 0.9rem;
-  border: 1px solid var(--fs-border-color);
-  background: var(--fs-surface-raised);
-  color: var(--fs-text-primary);
-  border-radius: var(--fs-radius-sm);
-  cursor: pointer;
-  font-size: 0.875rem;
-  font-family: inherit;
-}
-.modal-btn:hover { background: var(--fs-surface-page); }
-.modal-btn-danger { background: var(--fs-action-destructive); border-color: var(--fs-action-destructive); color: var(--fs-text-on-action); }
-.modal-btn-danger:hover { background: var(--fs-action-destructive-hover); border-color: var(--fs-action-destructive-hover); }
 </style>

frontend/src/components/TaskLogSection.vue

@@ -3,6 +3,7 @@ import { ref, onMounted } from "vue";
 import { apiGet, apiPost, apiPatch, apiDelete } from "@/api/client";
 import { renderMarkdown } from "@/utils/markdown";
 import type { TaskLog } from "@/types/task";
+import { fmtStamp } from "@/utils/dateFormat";
 
 const props = defineProps<{ taskId: number }>();
 
@@ -15,13 +16,6 @@ const editingId = ref<number | null>(null);
 const editContent = ref("");
 const editDuration = ref("");
 
-function formatDate(iso: string): string {
-  const d = new Date(iso);
-  const datePart = d.toLocaleDateString(undefined, { month: "short", day: "numeric", year: "numeric" });
-  const timePart = d.toLocaleTimeString(undefined, { hour: "2-digit", minute: "2-digit" });
-  return `${datePart}, ${timePart}`;
-}
-
 function formatDuration(minutes: number): string {
   if (minutes < 60) return `${minutes} min`;
   const h = Math.floor(minutes / 60);
@@ -128,7 +122,7 @@ onMounted(loadLogs);
       </template>
       <template v-else>
         <div class="log-entry-meta">
-          <span class="log-date">{{ formatDate(log.created_at) }}</span>
+          <span class="log-date">{{ fmtStamp(log.created_at) }}</span>
           <span v-if="log.duration_minutes" class="log-duration-badge">
             {{ formatDuration(log.duration_minutes) }}
           </span>

frontend/src/components/WorkspaceNoteEditor.vue

@@ -11,6 +11,7 @@ import TagInput from "@/components/TagInput.vue";
 import MarkdownToolbar from "@/components/MarkdownToolbar.vue";
 import WordCount from "@/components/WordCount.vue";
 import { Trash2, X } from "lucide-vue-next";
+import { relativeTimeOrDate } from "@/composables/useRelativeTime";
 
 const props = defineProps<{
   projectId: number;
@@ -252,20 +253,6 @@ async function confirmDelete(id: number) {
   }
 }
 
-function formatDate(iso: string): string {
-  const d = new Date(iso);
-  const now = new Date();
-  const diffMs = now.getTime() - d.getTime();
-  const diffMin = Math.floor(diffMs / 60_000);
-  const diffHrs = Math.floor(diffMs / 3_600_000);
-  const diffDays = Math.floor(diffMs / 86_400_000);
-  if (diffMin < 1) return "just now";
-  if (diffMin < 60) return `${diffMin}m ago`;
-  if (diffHrs < 24) return `${diffHrs}h ago`;
-  if (diffDays < 7) return `${diffDays}d ago`;
-  return d.toLocaleDateString(undefined, { month: "short", day: "numeric" });
-}
-
 watch(noteTitle, () => { dirty.value = true; });
 watch(noteBody, () => { dirty.value = true; if (editingId.value) scheduleLinkCheck(); });
 watch(noteTags, () => { dirty.value = true; });
@@ -346,7 +333,7 @@ defineExpose({ reload: loadProjectNotes });
         >
           <div class="note-row-main">
             <span class="note-row-title">{{ note.title || 'Untitled' }}</span>
-            <span class="note-row-age">{{ formatDate(note.updated_at) }}</span>
+            <span class="note-row-age">{{ relativeTimeOrDate(note.updated_at) }}</span>
           </div>
           <div v-if="note.tags?.length" class="note-row-tags">
             <span

frontend/src/components/WorkspaceTaskPanel.vue

@@ -6,6 +6,7 @@ import { useToastStore } from "@/stores/toast";
 import TaskLogSection from "@/components/TaskLogSection.vue";
 import { renderMarkdown } from "@/utils/markdown";
 import { Trash2, X } from "lucide-vue-next";
+import { relativeTimeOrDate } from "@/composables/useRelativeTime";
 
 const props = defineProps<{ projectId: number }>();
 
@@ -198,20 +199,6 @@ function cancelDeleteTask() {
   deleteConfirmPending.value = false;
 }
 
-function formatDate(iso: string): string {
-  const d = new Date(iso);
-  const now = new Date();
-  const diffMs = now.getTime() - d.getTime();
-  const diffMin = Math.floor(diffMs / 60_000);
-  const diffHrs = Math.floor(diffMs / 3_600_000);
-  const diffDays = Math.floor(diffMs / 86_400_000);
-  if (diffMin < 1) return "just now";
-  if (diffMin < 60) return `${diffMin}m ago`;
-  if (diffHrs < 24) return `${diffHrs}h ago`;
-  if (diffDays < 7) return `${diffDays}d ago`;
-  return d.toLocaleDateString(undefined, { month: "short", day: "numeric" });
-}
-
 onMounted(loadAll);
 defineExpose({ reload: loadAll });
 </script>
@@ -256,7 +243,7 @@ defineExpose({ reload: loadAll });
               <span v-if="task.priority && task.priority !== 'none'" :class="['priority-dot', PRIORITY_CLASS[task.priority] ?? '']"></span>
               <span class="task-title" :class="{ done: task.status === 'done' }">{{ task.title }}</span>
               <span v-if="task.due_date" :class="['task-due', { overdue: isRowOverdue(task) }]">{{ task.due_date }}</span>
-              <span class="task-age">{{ formatDate(task.updated_at) }}</span>
+              <span class="task-age">{{ relativeTimeOrDate(task.updated_at) }}</span>
             </li>
             <li v-if="groupedTasks.noMilestone.length === 0" class="empty-group">No tasks</li>
           </ul>
@@ -281,7 +268,7 @@ defineExpose({ reload: loadAll });
               <span v-if="task.priority && task.priority !== 'none'" :class="['priority-dot', PRIORITY_CLASS[task.priority] ?? '']"></span>
               <span class="task-title" :class="{ done: task.status === 'done' }">{{ task.title }}</span>
               <span v-if="task.due_date" :class="['task-due', { overdue: isRowOverdue(task) }]">{{ task.due_date }}</span>
-              <span class="task-age">{{ formatDate(task.updated_at) }}</span>
+              <span class="task-age">{{ relativeTimeOrDate(task.updated_at) }}</span>
             </li>
             <li v-if="msTasks.length === 0" class="empty-group">No tasks</li>
           </ul>

frontend/src/composables/useRelativeTime.ts

@@ -9,3 +9,15 @@ export function relativeTime(iso: string): string {
   const days = Math.floor(hours / 24);
   return `${days}d ago`;
 }
+
+/**
+ * relativeTime() for the recent past, a short date once it's a week old —
+ * the workspace panels' list-row timestamp ("3h ago" / "Jan 15"). Two
+ * panels used to carry identical copies of this.
+ */
+export function relativeTimeOrDate(iso: string): string {
+  const d = new Date(iso);
+  const days = Math.floor((Date.now() - d.getTime()) / 86_400_000);
+  if (days < 7) return relativeTime(iso);
+  return d.toLocaleDateString(undefined, { month: "short", day: "numeric" });
+}

frontend/src/utils/dateFormat.ts

@@ -1,65 +1,32 @@
-/** Shared date/time formatting helpers used across Calendar, Home, Knowledge, etc. */
-
-function _isSameDay(a: Date, b: Date): boolean {
-  return a.getFullYear() === b.getFullYear() &&
-    a.getMonth() === b.getMonth() &&
-    a.getDate() === b.getDate()
-}
-
-/** "9:30 AM" */
-export function fmtTime(dt: string): string {
-  return new Date(dt).toLocaleTimeString(undefined, { hour: "numeric", minute: "2-digit" })
-}
-
-/** "Mon, Jan 15" or "Mon, Jan 15, 9:30 AM" */
-export function fmtDateTime(dt: string, allDay: boolean): string {
-  const d = new Date(dt)
-  const datePart = d.toLocaleDateString(undefined, { weekday: "short", month: "short", day: "numeric" })
-  if (allDay) return datePart
-  return `${datePart}, ${d.toLocaleTimeString(undefined, { hour: "numeric", minute: "2-digit" })}`
-}
-
 /**
- * "Today 9:30 AM" / "Tomorrow 9:30 AM" / "Mon, Jan 15 9:30 AM"
+ * Shared date/time formatting — one rule per display shape. Views import
- * For all-day events returns "Today" / "Tomorrow" / "Mon, Jan 15"
+ * these instead of carrying a local formatDate(): the 2026-08 shape audit
+ * found eight copies across views/components, three of them byte-identical.
+ * (The previous Calendar/Home helpers in this file had no callers left and
+ * were removed in the same pass.)
+ *
+ * Relative forms ("5m ago") live next door in composables/useRelativeTime.
  */
-export function fmtRelativeDateTime(dt: string, allDay: boolean): string {
-  try {
-    const d = new Date(dt)
-    const now = new Date()
-    const tomorrow = new Date(now)
-    tomorrow.setDate(now.getDate() + 1)
 
-    const timeStr = allDay ? "" : ` ${d.toLocaleTimeString(undefined, { hour: "numeric", minute: "2-digit" })}`
+/** "Jan 15, 2026" — a date with no time of day (user created_at, key expiry). */
-
+export function fmtDate(iso: string): string {
-    if (_isSameDay(d, now)) return `Today${timeStr}`
+  return new Date(iso).toLocaleDateString(undefined, {
-    if (_isSameDay(d, tomorrow)) return `Tomorrow${timeStr}`
+    year: "numeric", month: "short", day: "numeric",
-    return d.toLocaleDateString(undefined, { weekday: "short", month: "short", day: "numeric" }) + timeStr
+  });
-  } catch {
-    return dt
-  }
 }
 
-/**
+/** "Jan 15, 2026, 09:30 AM" — a full timestamp (task logs, version history). */
- * Label-only: "Today" / "Tomorrow" / "Mon, Jan 15"
+export function fmtStamp(iso: string): string {
- */
+  return new Date(iso).toLocaleString(undefined, {
-export function fmtDayLabel(dt: string): string {
+    month: "short", day: "numeric", year: "numeric",
-  try {
+    hour: "2-digit", minute: "2-digit",
-    const d = new Date(dt)
+  });
-    const now = new Date()
-    const tomorrow = new Date(now)
-    tomorrow.setDate(now.getDate() + 1)
-    if (_isSameDay(d, now)) return "Today"
-    if (_isSameDay(d, tomorrow)) return "Tomorrow"
-    return d.toLocaleDateString(undefined, { weekday: "short", month: "short", day: "numeric" })
-  } catch {
-    return dt
-  }
 }
 
-/** "Jan 15" or "Jan 15, 9:30 AM" — compact, no weekday */
+/** "Jan 15, 09:30:05 AM" — log-table timestamp: seconds matter, the year doesn't. */
-export function fmtCompact(dt: string, allDay: boolean): string {
+export function fmtLogStamp(iso: string): string {
-  const d = new Date(dt)
+  return new Date(iso).toLocaleString(undefined, {
-  if (allDay) return d.toLocaleDateString(undefined, { month: "short", day: "numeric" })
+    month: "short", day: "numeric",
-  return d.toLocaleString(undefined, { month: "short", day: "numeric", hour: "numeric", minute: "2-digit" })
+    hour: "2-digit", minute: "2-digit", second: "2-digit",
+  });
 }

frontend/src/views/ForgotPasswordView.vue

@@ -1,6 +1,6 @@
 <script setup lang="ts">
 import { ref } from "vue";
-import { apiPost } from "@/api/client";
+import { apiPost, apiErrorMessage } from "@/api/client";
 import AppLogo from "@/components/AppLogo.vue";
 
 const email = ref("");
@@ -15,12 +15,7 @@ async function handleSubmit() {
     await apiPost("/api/auth/forgot-password", { email: email.value });
     submitted.value = true;
   } catch (e: unknown) {
-    if (e && typeof e === "object" && "body" in e) {
+    error.value = apiErrorMessage(e, "Something went wrong");
-      const body = (e as { body?: { error?: string } }).body;
-      error.value = body?.error || "Something went wrong";
-    } else {
-      error.value = "Something went wrong";
-    }
   } finally {
     submitting.value = false;
   }
@@ -55,7 +50,7 @@ async function handleSubmit() {
         </form>
       </template>
 
-      <div v-else class="success-msg">
+      <div v-else class="auth-note">
         <p>If an account exists with that email address, you will receive a password reset link shortly.</p>
         <p>Check your email and follow the instructions to reset your password.</p>
       </div>
@@ -67,83 +62,4 @@ async function handleSubmit() {
   </main>
 </template>
 
-<style scoped>
+<style src="@/assets/auth-shared.css" />
-.auth-page {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  min-height: 100vh;
-  padding: 1rem;
-}
-.auth-card {
-  width: 100%;
-  max-width: 400px;
-  background: var(--fs-surface-raised);
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-lg);
-  padding: 2rem;
-}
-.auth-brand {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  gap: 0.5rem;
-  margin-bottom: 1.5rem;
-}
-.auth-card h1 {
-  margin: 0;
-  text-align: center;
-}
-.auth-hint {
-  text-align: center;
-  font-size: 0.9rem;
-  color: var(--fs-text-secondary);
-  margin-bottom: 1rem;
-}
-.field {
-  margin-bottom: 1rem;
-}
-.field label {
-  display: block;
-  font-size: 0.9rem;
-  font-weight: 600;
-  margin-bottom: 0.35rem;
-}
-.input {
-  width: 100%;
-  padding: 0.5rem 0.75rem;
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-sm);
-  font-size: 0.95rem;
-  background: var(--fs-surface-page);
-  color: var(--fs-text-primary);
-  box-sizing: border-box;
-}
-.input:focus {
-  outline: none;
-  border-color: var(--fs-accent);
-}
-.error-msg {
-  color: var(--fs-error);
-  font-size: 0.9rem;
-  margin: 0 0 0.75rem;
-}
-.success-msg {
-  text-align: center;
-  color: var(--fs-text-secondary);
-  font-size: 0.95rem;
-  padding: 0.5rem 0;
-}
-.success-msg p {
-  margin: 0.5rem 0;
-}
-.auth-footer {
-  text-align: center;
-  font-size: 0.9rem;
-  color: var(--fs-text-secondary);
-  margin: 1rem 0 0;
-}
-.auth-footer a {
-  color: var(--fs-accent);
-}
-</style>

frontend/src/views/LoginView.vue

@@ -3,6 +3,7 @@ import { ref, computed, onMounted } from "vue";
 import { useRouter, useRoute } from "vue-router";
 import { useAuthStore } from "@/stores/auth";
 import AppLogo from "@/components/AppLogo.vue";
+import { apiErrorMessage } from "@/api/client";
 
 const router = useRouter();
 const route = useRoute();
@@ -30,12 +31,7 @@ async function handleSubmit() {
     const redirect = (route.query.redirect as string) || "/";
     router.push(redirect);
   } catch (e: unknown) {
-    if (e && typeof e === "object" && "body" in e) {
+    error.value = apiErrorMessage(e, "Login failed");
-      const body = (e as { body?: { error?: string } }).body;
-      error.value = body?.error || "Login failed";
-    } else {
-      error.value = "Login failed";
-    }
   } finally {
     submitting.value = false;
   }
@@ -112,70 +108,8 @@ function loginWithOAuth() {
   </main>
 </template>
 
+<style src="@/assets/auth-shared.css" />
 <style scoped>
-.auth-page {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  min-height: 100vh;
-  padding: 1rem;
-}
-.auth-card {
-  width: 100%;
-  max-width: 400px;
-  background: var(--fs-surface-raised);
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-lg);
-  padding: 2rem;
-}
-.auth-brand {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  gap: 0.5rem;
-  margin-bottom: 1.5rem;
-}
-.auth-card h1 {
-  margin: 0;
-  text-align: center;
-}
-.auth-hint {
-  text-align: center;
-  font-size: 0.9rem;
-  color: var(--fs-text-secondary);
-  margin-bottom: 1rem;
-}
-.auth-hint a {
-  color: var(--fs-accent);
-}
-.field {
-  margin-bottom: 1rem;
-}
-.field label {
-  display: block;
-  font-size: 0.9rem;
-  font-weight: 600;
-  margin-bottom: 0.35rem;
-}
-.input {
-  width: 100%;
-  padding: 0.5rem 0.75rem;
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-sm);
-  font-size: 0.95rem;
-  background: var(--fs-surface-page);
-  color: var(--fs-text-primary);
-  box-sizing: border-box;
-}
-.input:focus {
-  outline: none;
-  border-color: var(--fs-accent);
-}
-.error-msg {
-  color: var(--fs-error);
-  font-size: 0.9rem;
-  margin: 0 0 0.75rem;
-}
 .divider {
   display: flex;
   align-items: center;
@@ -190,15 +124,6 @@ function loginWithOAuth() {
   flex: 1;
   border-top: 1px solid var(--fs-border-color);
 }
-.auth-footer {
-  text-align: center;
-  font-size: 0.9rem;
-  color: var(--fs-text-secondary);
-  margin: 1rem 0 0;
-}
-.auth-footer a {
-  color: var(--fs-accent);
-}
 .forgot-link {
   text-align: right;
   margin: -0.5rem 0 0.75rem;

frontend/src/views/LogsView.vue

@@ -3,6 +3,7 @@ import { ref, onMounted, watch } from "vue";
 import { apiGet } from "@/api/client";
 import { useToastStore } from "@/stores/toast";
 import PaginationBar from "@/components/PaginationBar.vue";
+import { fmtLogStamp } from "@/utils/dateFormat";
 
 const toastStore = useToastStore();
 
@@ -98,17 +99,6 @@ function toggleExpand(id: number) {
   expandedId.value = expandedId.value === id ? null : id;
 }
 
-function formatTime(iso: string): string {
-  const d = new Date(iso);
-  return d.toLocaleString(undefined, {
-    month: "short",
-    day: "numeric",
-    hour: "2-digit",
-    minute: "2-digit",
-    second: "2-digit",
-  });
-}
-
 function formatDetails(details: string | null): string {
   if (!details) return "";
   try {
@@ -210,7 +200,7 @@ function clearFilters() {
                 :class="{ 'row-expanded': expandedId === entry.id }"
                 @click="toggleExpand(entry.id)"
               >
-                <td class="cell-time">{{ formatTime(entry.created_at) }}</td>
+                <td class="cell-time">{{ fmtLogStamp(entry.created_at) }}</td>
                 <td>
                   <span class="category-badge" :class="'cat-' + entry.category">
                     {{ entry.category }}

frontend/src/views/ProjectListView.vue

@@ -559,24 +559,8 @@ function overallPct(project: Project): { total: number; pct: number } {
   color: var(--fs-text-tertiary);
 }
 
-/* Modal */
-.modal-overlay {
-  position: fixed;
-  inset: 0;
-  background: var(--fs-overlay);
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  z-index: 200;
-}
 .modal-card {
-  background: var(--fs-surface-raised);
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-lg);
-  padding: 1.5rem;
-  width: 100%;
   max-width: 480px;
-  box-shadow: 0 8px 32px var(--color-shadow);
   display: flex;
   flex-direction: column;
   gap: 1rem;
@@ -618,36 +602,6 @@ function overallPct(project: Project): { total: number; pct: number } {
 .modal-textarea {
   resize: vertical;
 }
-.modal-actions {
-  display: flex;
-  justify-content: flex-end;
-  gap: 0.5rem;
-}
-.modal-btn {
-  padding: 0.4rem 0.9rem;
-  border: 1px solid var(--fs-border-color);
-  background: var(--fs-surface-raised);
-  color: var(--fs-text-primary);
-  border-radius: var(--fs-radius-sm);
-  cursor: pointer;
-  font-size: 0.875rem;
-  font-family: inherit;
-}
-.modal-btn:hover {
-  background: var(--fs-surface-page);
-}
-.modal-btn-primary {
-  background: var(--fs-action-primary);
-  border-color: var(--fs-action-primary);
-  color: var(--fs-text-on-action);
-}
-.modal-btn-primary:hover:not(:disabled) {
-  opacity: 0.9;
-}
-.modal-btn-primary:disabled {
-  opacity: 0.5;
-  cursor: default;
-}
 
 @media (max-width: 600px) {
   .projects-grid {

frontend/src/views/ProjectView.vue

@@ -427,6 +427,13 @@ interface CoverageGap {
   unclassified: number;
   total: number;
 }
+interface DeriveGroup {
+  group: string;
+  kind: string;
+  label: string;
+  size: number;
+  paths: string[];
+}
 interface Coverage {
   total: number;
   accounted: number;
@@ -436,6 +443,21 @@ interface Coverage {
   computed_at: string;
   repos: { repo: string; ref: string; total: number; accounted: number }[];
   largest_gaps: CoverageGap[];
+  // The mechanical proposer's standing (#2792): canon proposals awaiting an
+  // agent's confirm, and the biggest repeats-with-no-canon families.
+  proposed?: number;
+  derive_groups?: DeriveGroup[];
+  // The divergence readout (#2793): button B where button A is canon, and
+  // judged shapes whose bodies moved since they were judged.
+  divergent?: number;
+  divergence?: Divergence[];
+  recheck?: number;
+}
+interface Divergence {
+  path: string;
+  symbol: string;
+  kind: string;
+  canon_snippet_id: number;
 }
 
 const coverage = ref<Coverage | null>(null);
@@ -732,7 +754,7 @@ async function confirmDelete() {
           </div>
           <div v-if="coverage.counts" class="coverage-gaps">
             <span
-              v-for="k in ['canonical', 'instance', 'variant', 'exempt']"
+              v-for="k in ['canonical', 'instance', 'variant', 'exempt', 'scoped']"
               :key="k"
             >
               <span v-if="coverage.counts[k]" class="coverage-gap-chip">
@@ -746,6 +768,46 @@ async function confirmDelete() {
               {{ gap.dir }} <span class="coverage-gap-count">{{ gap.unclassified }}</span>
             </span>
           </div>
+          <div
+            v-if="coverage.proposed || coverage.derive_groups?.length"
+            class="coverage-gaps"
+            title="The proposer matched these against canon; an agent confirms them in batches (confirm_shape_proposals)."
+          >
+            <span class="coverage-gaps-label">Proposed:</span>
+            <span v-if="coverage.proposed" class="coverage-gap-chip">
+              {{ coverage.proposed }} awaiting confirm
+            </span>
+            <span
+              v-for="g in coverage.derive_groups || []"
+              :key="g.group"
+              class="coverage-gap-chip"
+              :title="'Repeats with no canon — derive one first. ' + g.paths.join(', ')"
+            >
+              {{ g.label }} <span class="coverage-gap-count">×{{ g.size }}</span>
+            </span>
+          </div>
+          <div
+            v-if="coverage.divergent || coverage.recheck"
+            class="coverage-gaps"
+            title="Divergent: a new shape where one canon dominates its directory and that isn't proposed as that canon — button B where button A is canon. Recheck: a judged shape whose body changed since it was judged."
+          >
+            <span class="coverage-gaps-label">Divergence:</span>
+            <span
+              v-for="d in coverage.divergence || []"
+              :key="d.path + '::' + d.symbol"
+              class="coverage-gap-chip coverage-divergent"
+              :title="d.path + ' — canon here is snippet #' + d.canon_snippet_id"
+            >
+              {{ d.kind === 'css' ? '.' : '' }}{{ d.symbol }}
+              <span class="coverage-gap-count">→ #{{ d.canon_snippet_id }}</span>
+            </span>
+            <span v-if="(coverage.divergent || 0) > (coverage.divergence?.length || 0)" class="coverage-gap-chip">
+              +{{ (coverage.divergent || 0) - (coverage.divergence?.length || 0) }} more
+            </span>
+            <span v-if="coverage.recheck" class="coverage-gap-chip">
+              {{ coverage.recheck }} to recheck
+            </span>
+          </div>
         </template>
         <p v-else class="coverage-empty">
           Not measured yet — Refresh reads the bound repo's definitions into
@@ -1300,6 +1362,7 @@ async function confirmDelete() {
   font-size: 0.74rem;
 }
 .coverage-gap-count { opacity: 0.65; }
+.coverage-divergent { border-color: var(--fs-warning); }
 .coverage-empty {
   margin: 0;
   font-size: 0.8rem;
@@ -1752,31 +1815,6 @@ async function confirmDelete() {
   display: flex; align-items: center; justify-content: center;
   z-index: 200;
 }
-.modal-card {
-  background: var(--fs-surface-raised);
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-lg);
-  padding: 1.5rem;
-  width: 100%;
-  max-width: 400px;
-  box-shadow: 0 8px 32px var(--color-shadow);
-}
-.modal-title { margin: 0 0 0.75rem; font-size: 1.05rem; }
-.modal-message { font-size: 0.9rem; color: var(--fs-text-secondary); margin: 0 0 1.25rem; line-height: 1.5; }
-.modal-actions { display: flex; justify-content: flex-end; gap: 0.5rem; }
-.modal-btn {
-  padding: 0.4rem 0.9rem;
-  border: 1px solid var(--fs-border-color);
-  background: var(--fs-surface-raised);
-  color: var(--fs-text-primary);
-  border-radius: var(--fs-radius-sm);
-  cursor: pointer;
-  font-size: 0.875rem;
-  font-family: inherit;
-}
-.modal-btn:hover { background: var(--fs-surface-page); }
-.modal-btn-danger { background: var(--fs-action-destructive); border-color: var(--fs-action-destructive); color: var(--fs-text-on-action); }
-.modal-btn-danger:hover { background: var(--fs-action-destructive-hover); border-color: var(--fs-action-destructive-hover); }
 
 /* ── Skeleton ────────────────────────────────────────────────── */
 @keyframes skel-shine { to { background-position: 200% center; } }

frontend/src/views/RegisterInviteView.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { ref, computed, onMounted } from "vue";
 import { useRoute, useRouter } from "vue-router";
-import { apiGet, apiPost } from "@/api/client";
+import { apiGet, apiPost, apiErrorMessage } from "@/api/client";
 import { useAuthStore } from "@/stores/auth";
 import AppLogo from "@/components/AppLogo.vue";
 
@@ -68,12 +68,7 @@ async function handleSubmit() {
     await authStore.checkAuth();
     router.push("/");
   } catch (e: unknown) {
-    if (e && typeof e === "object" && "body" in e) {
+    error.value = apiErrorMessage(e, "Registration failed");
-      const body = (e as { body?: { error?: string } }).body;
-      error.value = body?.error || "Registration failed";
-    } else {
-      error.value = "Registration failed";
-    }
   } finally {
     submitting.value = false;
   }
@@ -85,9 +80,9 @@ async function handleSubmit() {
     <div class="auth-card">
       <div class="auth-brand"><AppLogo :size="32" /><h1>Accept Invitation</h1></div>
 
-      <div v-if="validating" class="loading-msg">Validating invitation...</div>
+      <div v-if="validating" class="auth-loading">Validating invitation...</div>
 
-      <div v-else-if="!token || !valid" class="error-block">
+      <div v-else-if="!token || !valid" class="auth-note">
         <p>This invitation link is invalid or has expired.</p>
         <p class="auth-footer">
           <router-link to="/login">Back to Sign In</router-link>
@@ -157,103 +152,4 @@ async function handleSubmit() {
   </main>
 </template>
 
-<style scoped>
+<style src="@/assets/auth-shared.css" />
-.auth-page {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  min-height: 100vh;
-  padding: 1rem;
-}
-.auth-card {
-  width: 100%;
-  max-width: 400px;
-  background: var(--fs-surface-raised);
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-lg);
-  padding: 2rem;
-}
-.auth-brand {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  gap: 0.5rem;
-  margin-bottom: 1.5rem;
-}
-.auth-card h1 {
-  margin: 0;
-  text-align: center;
-}
-.loading-msg {
-  text-align: center;
-  color: var(--fs-text-tertiary);
-  font-size: 0.95rem;
-  padding: 1rem 0;
-}
-.error-block {
-  text-align: center;
-  color: var(--fs-text-secondary);
-  font-size: 0.95rem;
-  padding: 0.5rem 0;
-}
-.error-block p {
-  margin: 0.5rem 0;
-}
-.field {
-  margin-bottom: 1rem;
-}
-.field label {
-  display: block;
-  font-size: 0.9rem;
-  font-weight: 600;
-  margin-bottom: 0.35rem;
-}
-.input {
-  width: 100%;
-  padding: 0.5rem 0.75rem;
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-sm);
-  font-size: 0.95rem;
-  background: var(--fs-surface-page);
-  color: var(--fs-text-primary);
-  box-sizing: border-box;
-}
-.input:disabled {
-  opacity: 0.6;
-  cursor: not-allowed;
-}
-.input:focus {
-  outline: none;
-  border-color: var(--fs-accent);
-}
-.input-error {
-  border-color: var(--fs-error);
-}
-.input-error:focus {
-  border-color: var(--fs-error);
-}
-.field-hint {
-  margin: 0.35rem 0 0;
-  font-size: 0.8rem;
-  color: var(--fs-text-tertiary);
-}
-.error-hint {
-  margin: 0.35rem 0 0;
-  font-size: 0.8rem;
-  color: var(--fs-error);
-}
-.error-msg {
-  color: var(--fs-error);
-  font-size: 0.9rem;
-  margin: 0 0 0.75rem;
-}
-.auth-footer {
-  text-align: center;
-  font-size: 0.9rem;
-  color: var(--fs-text-secondary);
-  margin: 1rem 0 0;
-}
-.auth-footer a {
-  color: var(--fs-accent);
-}
-</style>

frontend/src/views/RegisterView.vue

@@ -3,6 +3,7 @@ import { ref, computed, onMounted } from "vue";
 import { useRouter } from "vue-router";
 import { useAuthStore } from "@/stores/auth";
 import AppLogo from "@/components/AppLogo.vue";
+import { apiErrorMessage } from "@/api/client";
 
 const router = useRouter();
 const authStore = useAuthStore();
@@ -39,12 +40,7 @@ async function handleSubmit() {
     await authStore.register(username.value, password.value, email.value || undefined);
     router.push("/");
   } catch (e: unknown) {
-    if (e && typeof e === "object" && "body" in e) {
+    error.value = apiErrorMessage(e, "Registration failed");
-      const body = (e as { body?: { error?: string } }).body;
-      error.value = body?.error || "Registration failed";
-    } else {
-      error.value = "Registration failed";
-    }
   } finally {
     submitting.value = false;
   }
@@ -56,9 +52,9 @@ async function handleSubmit() {
     <div class="auth-card">
       <div class="auth-brand"><AppLogo :size="32" /><h1>Create Account</h1></div>
 
-      <div v-if="checking" class="loading-msg">Checking registration status...</div>
+      <div v-if="checking" class="auth-loading">Checking registration status...</div>
 
-      <div v-else-if="!authStore.registrationOpen" class="closed-msg">
+      <div v-else-if="!authStore.registrationOpen" class="auth-note">
         <p>Registration is currently closed.</p>
         <p>Contact an administrator to get an account.</p>
         <p class="auth-footer">
@@ -130,99 +126,4 @@ async function handleSubmit() {
   </main>
 </template>
 
-<style scoped>
+<style src="@/assets/auth-shared.css" />
-.auth-page {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  min-height: 100vh;
-  padding: 1rem;
-}
-.auth-card {
-  width: 100%;
-  max-width: 400px;
-  background: var(--fs-surface-raised);
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-lg);
-  padding: 2rem;
-}
-.auth-brand {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  gap: 0.5rem;
-  margin-bottom: 1.5rem;
-}
-.auth-card h1 {
-  margin: 0;
-  text-align: center;
-}
-.loading-msg {
-  text-align: center;
-  color: var(--fs-text-tertiary);
-  font-size: 0.9rem;
-  padding: 1rem 0;
-}
-.closed-msg {
-  text-align: center;
-  color: var(--fs-text-secondary);
-  font-size: 0.95rem;
-  padding: 0.5rem 0;
-}
-.closed-msg p {
-  margin: 0.5rem 0;
-}
-.field {
-  margin-bottom: 1rem;
-}
-.field label {
-  display: block;
-  font-size: 0.9rem;
-  font-weight: 600;
-  margin-bottom: 0.35rem;
-}
-.input {
-  width: 100%;
-  padding: 0.5rem 0.75rem;
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-sm);
-  font-size: 0.95rem;
-  background: var(--fs-surface-page);
-  color: var(--fs-text-primary);
-  box-sizing: border-box;
-}
-.input:focus {
-  outline: none;
-  border-color: var(--fs-accent);
-}
-.input-error {
-  border-color: var(--fs-error);
-}
-.input-error:focus {
-  border-color: var(--fs-error);
-}
-.field-hint {
-  margin: 0.35rem 0 0;
-  font-size: 0.8rem;
-  color: var(--fs-text-tertiary);
-}
-.error-hint {
-  margin: 0.35rem 0 0;
-  font-size: 0.8rem;
-  color: var(--fs-error);
-}
-.error-msg {
-  color: var(--fs-error);
-  font-size: 0.9rem;
-  margin: 0 0 0.75rem;
-}
-.auth-footer {
-  text-align: center;
-  font-size: 0.9rem;
-  color: var(--fs-text-secondary);
-  margin: 1rem 0 0;
-}
-.auth-footer a {
-  color: var(--fs-accent);
-}
-</style>

frontend/src/views/ResetPasswordView.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { ref, computed } from "vue";
 import { useRoute } from "vue-router";
-import { apiPost } from "@/api/client";
+import { apiPost, apiErrorMessage } from "@/api/client";
 import AppLogo from "@/components/AppLogo.vue";
 
 const route = useRoute();
@@ -35,12 +35,7 @@ async function handleSubmit() {
     });
     success.value = true;
   } catch (e: unknown) {
-    if (e && typeof e === "object" && "body" in e) {
+    error.value = apiErrorMessage(e, "Failed to reset password");
-      const body = (e as { body?: { error?: string } }).body;
-      error.value = body?.error || "Failed to reset password";
-    } else {
-      error.value = "Failed to reset password";
-    }
   } finally {
     submitting.value = false;
   }
@@ -52,7 +47,7 @@ async function handleSubmit() {
     <div class="auth-card">
       <div class="auth-brand"><AppLogo :size="32" /><h1>Set New Password</h1></div>
 
-      <div v-if="!token" class="error-block">
+      <div v-if="!token" class="auth-note">
         <p>Invalid reset link. Please request a new password reset.</p>
         <p class="auth-footer">
           <router-link to="/forgot-password">Request new link</router-link>
@@ -94,7 +89,7 @@ async function handleSubmit() {
         </form>
       </template>
 
-      <div v-else class="success-msg">
+      <div v-else class="auth-note">
         <p>Your password has been reset successfully.</p>
         <p>You can now sign in with your new password.</p>
       </div>
@@ -106,102 +101,4 @@ async function handleSubmit() {
   </main>
 </template>
 
-<style scoped>
+<style src="@/assets/auth-shared.css" />
-.auth-page {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  min-height: 100vh;
-  padding: 1rem;
-}
-.auth-card {
-  width: 100%;
-  max-width: 400px;
-  background: var(--fs-surface-raised);
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-lg);
-  padding: 2rem;
-}
-.auth-brand {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  gap: 0.5rem;
-  margin-bottom: 1.5rem;
-}
-.auth-card h1 {
-  margin: 0;
-  text-align: center;
-}
-.error-block {
-  text-align: center;
-  color: var(--fs-text-secondary);
-  font-size: 0.95rem;
-  padding: 0.5rem 0;
-}
-.error-block p {
-  margin: 0.5rem 0;
-}
-.success-msg {
-  text-align: center;
-  color: var(--fs-text-secondary);
-  font-size: 0.95rem;
-  padding: 0.5rem 0;
-}
-.success-msg p {
-  margin: 0.5rem 0;
-}
-.field {
-  margin-bottom: 1rem;
-}
-.field label {
-  display: block;
-  font-size: 0.9rem;
-  font-weight: 600;
-  margin-bottom: 0.35rem;
-}
-.input {
-  width: 100%;
-  padding: 0.5rem 0.75rem;
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-sm);
-  font-size: 0.95rem;
-  background: var(--fs-surface-page);
-  color: var(--fs-text-primary);
-  box-sizing: border-box;
-}
-.input:focus {
-  outline: none;
-  border-color: var(--fs-accent);
-}
-.input-error {
-  border-color: var(--fs-error);
-}
-.input-error:focus {
-  border-color: var(--fs-error);
-}
-.field-hint {
-  margin: 0.35rem 0 0;
-  font-size: 0.8rem;
-  color: var(--fs-text-tertiary);
-}
-.error-hint {
-  margin: 0.35rem 0 0;
-  font-size: 0.8rem;
-  color: var(--fs-error);
-}
-.error-msg {
-  color: var(--fs-error);
-  font-size: 0.9rem;
-  margin: 0 0 0.75rem;
-}
-.auth-footer {
-  text-align: center;
-  font-size: 0.9rem;
-  color: var(--fs-text-secondary);
-  margin: 1rem 0 0;
-}
-.auth-footer a {
-  color: var(--fs-accent);
-}
-</style>

frontend/src/views/SettingsView.vue

@@ -3,10 +3,11 @@ import { ref, computed, watch, onMounted } from "vue";
 import { useSettingsStore } from "@/stores/settings";
 import { useAuthStore } from "@/stores/auth";
 import { useToastStore } from "@/stores/toast";
-import { apiGet, apiPost, apiPut, apiDelete, listGroups, createGroup, deleteGroup, listGroupMembers, addGroupMember, removeGroupMember, searchUsers, listApiKeys, createApiKey as apiCreateApiKey, revokeApiKey as apiRevokeApiKey, getProfile, updateProfile, type ApiKeyEntry, type GroupEntry, type GroupMember, type UserSearchResult, type UserProfile } from "@/api/client";
+import { apiGet, apiPost, apiPut, apiDelete, listGroups, createGroup, deleteGroup, listGroupMembers, addGroupMember, removeGroupMember, searchUsers, listApiKeys, createApiKey as apiCreateApiKey, revokeApiKey as apiRevokeApiKey, getProfile, updateProfile, type ApiKeyEntry, type GroupEntry, type GroupMember, type UserSearchResult, type UserProfile, apiErrorMessage } from "@/api/client";
 import type { User } from "@/types/auth";
 import PaginationBar from "@/components/PaginationBar.vue";
 import TagInput from "@/components/TagInput.vue";
+import { fmtDate, fmtLogStamp } from "@/utils/dateFormat";
 
 const store = useSettingsStore();
 const authStore = useAuthStore();
@@ -624,12 +625,7 @@ async function changeEmail() {
     emailPassword.value = "";
     toastStore.show("Email updated successfully");
   } catch (e: unknown) {
-    if (e && typeof e === "object" && "body" in e) {
+    toastStore.show(apiErrorMessage(e, "Failed to update email"), "error");
-      const b = (e as { body?: { error?: string } }).body;
-      toastStore.show(b?.error || "Failed to update email", "error");
-    } else {
-      toastStore.show("Failed to update email", "error");
-    }
   } finally {
     changingEmail.value = false;
   }
@@ -663,12 +659,7 @@ async function changePassword() {
     newPassword.value = "";
     confirmNewPassword.value = "";
   } catch (e: unknown) {
-    if (e && typeof e === "object" && "body" in e) {
+    toastStore.show(apiErrorMessage(e, "Failed to change password"), "error");
-      const body = (e as { body?: { error?: string } }).body;
-      toastStore.show(body?.error || "Failed to change password", "error");
-    } else {
-      toastStore.show("Failed to change password", "error");
-    }
   } finally {
     changingPassword.value = false;
   }
@@ -766,12 +757,7 @@ async function sendTestEmail() {
     await apiPost("/api/admin/smtp/test", { recipient: testRecipient.value.trim() });
     toastStore.show("Test email sent successfully");
   } catch (e: unknown) {
-    if (e && typeof e === "object" && "body" in e) {
+    toastStore.show(apiErrorMessage(e, "Failed to send test email"), "error");
-      const body = (e as { body?: { error?: string } }).body;
-      toastStore.show(body?.error || "Failed to send test email", "error");
-    } else {
-      toastStore.show("Failed to send test email", "error");
-    }
   } finally {
     sendingTest.value = false;
   }
@@ -1129,14 +1115,6 @@ function toggleLogExpand(id: number) {
   expandedLogId.value = expandedLogId.value === id ? null : id;
 }
 
-function formatLogTime(iso: string): string {
-  const d = new Date(iso);
-  return d.toLocaleString(undefined, {
-    month: "short", day: "numeric",
-    hour: "2-digit", minute: "2-digit", second: "2-digit",
-  });
-}
-
 function formatLogDetails(details: string | null): string {
   if (!details) return "";
   try { return JSON.stringify(JSON.parse(details), null, 2); } catch { return details; }
@@ -1224,12 +1202,6 @@ async function deleteUser(userId: number) {
     deleting.value = null;
   }
 }
-
-function formatUserDate(iso: string): string {
-  return new Date(iso).toLocaleDateString(undefined, {
-    year: "numeric", month: "short", day: "numeric",
-  });
-}
 </script>
 
 <template>
@@ -2355,8 +2327,8 @@ function formatUserDate(iso: string): string {
             <tbody>
               <tr v-for="inv in invitations" :key="inv.id">
                 <td class="cell-email">{{ inv.email }}</td>
-                <td class="hide-mobile cell-date">{{ formatUserDate(inv.created_at) }}</td>
+                <td class="hide-mobile cell-date">{{ fmtDate(inv.created_at) }}</td>
-                <td class="hide-mobile cell-date">{{ formatUserDate(inv.expires_at) }}</td>
+                <td class="hide-mobile cell-date">{{ fmtDate(inv.expires_at) }}</td>
                 <td class="cell-actions">
                   <button class="btn-ghost btn-compact" @click="revokeInvitation(inv.id)" :disabled="revokingId !== null">
                     {{ revokingId === inv.id ? "Revoking..." : "Revoke" }}
@@ -2391,7 +2363,7 @@ function formatUserDate(iso: string): string {
                   {{ u.role }}
                 </span>
               </td>
-              <td class="hide-mobile cell-date">{{ formatUserDate(u.created_at) }}</td>
+              <td class="hide-mobile cell-date">{{ fmtDate(u.created_at) }}</td>
               <td class="cell-actions">
                 <template v-if="u.id === authStore.user?.id">
                   <span class="you-label">You</span>
@@ -2474,7 +2446,7 @@ function formatUserDate(iso: string): string {
             <tbody>
               <template v-for="entry in logs" :key="entry.id">
                 <tr class="log-row" :class="{ 'row-expanded': expandedLogId === entry.id }" @click="toggleLogExpand(entry.id)">
-                  <td class="cell-time">{{ formatLogTime(entry.created_at) }}</td>
+                  <td class="cell-time">{{ fmtLogStamp(entry.created_at) }}</td>
                   <td>
                     <span class="category-badge" :class="'cat-' + entry.category">{{ entry.category }}</span>
                   </td>

frontend/src/views/SnippetListView.vue

@@ -903,23 +903,8 @@ function usageTitle(s: SnippetListItem): string {
 }
 
 /* Merge modal */
-.modal-overlay {
-  position: fixed;
-  inset: 0;
-  background: var(--fs-overlay);
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  z-index: 200;
-}
 .modal-card {
-  background: var(--fs-surface-raised);
-  border: 1px solid var(--fs-border-color);
-  border-radius: var(--fs-radius-lg);
-  padding: 1.5rem;
-  width: 100%;
   max-width: 460px;
-  box-shadow: 0 8px 32px var(--color-shadow);
   display: flex;
   flex-direction: column;
   gap: 1rem;
@@ -966,36 +951,6 @@ function usageTitle(s: SnippetListItem): string {
   color: var(--fs-text-tertiary);
   flex-shrink: 0;
 }
-.modal-actions {
-  display: flex;
-  justify-content: flex-end;
-  gap: 0.5rem;
-}
-.modal-btn {
-  padding: 0.4rem 0.9rem;
-  border: 1px solid var(--fs-border-color);
-  background: var(--fs-surface-raised);
-  color: var(--fs-text-primary);
-  border-radius: var(--fs-radius-sm);
-  cursor: pointer;
-  font-size: 0.875rem;
-  font-family: inherit;
-}
-.modal-btn:hover {
-  background: var(--fs-surface-page);
-}
-.modal-btn-primary {
-  background: var(--fs-action-primary);
-  border-color: var(--fs-action-primary);
-  color: var(--fs-text-on-action);
-}
-.modal-btn-primary:hover:not(:disabled) {
-  background: var(--fs-action-primary-hover);
-}
-.modal-btn-primary:disabled {
-  opacity: 0.5;
-  cursor: default;
-}
 
 @media (max-width: 600px) {
   .snippets-grid {

frontend/src/views/UserManagementView.vue

@@ -1,9 +1,10 @@
 <script setup lang="ts">
 import { ref, onMounted } from "vue";
-import { apiGet, apiPost, apiPut, apiDelete } from "@/api/client";
+import { apiGet, apiPost, apiPut, apiDelete, apiErrorMessage } from "@/api/client";
 import { useAuthStore } from "@/stores/auth";
 import { useToastStore } from "@/stores/toast";
 import type { User } from "@/types/auth";
+import { fmtDate } from "@/utils/dateFormat";
 
 interface Invitation {
   id: number;
@@ -69,12 +70,7 @@ async function sendInvite() {
     inviteEmail.value = "";
     await fetchInvitations();
   } catch (e: unknown) {
-    if (e && typeof e === "object" && "body" in e) {
+    toastStore.show(apiErrorMessage(e, "Failed to send invitation"), "error");
-      const body = (e as { body?: { error?: string } }).body;
-      toastStore.show(body?.error || "Failed to send invitation", "error");
-    } else {
-      toastStore.show("Failed to send invitation", "error");
-    }
   } finally {
     sendingInvite.value = false;
   }
@@ -128,24 +124,11 @@ async function deleteUser(userId: number) {
     users.value = users.value.filter((u) => u.id !== userId);
     toastStore.show("User deleted");
   } catch (e: unknown) {
-    if (e && typeof e === "object" && "body" in e) {
+    toastStore.show(apiErrorMessage(e, "Failed to delete user"), "error");
-      const body = (e as { body?: { error?: string } }).body;
-      toastStore.show(body?.error || "Failed to delete user", "error");
-    } else {
-      toastStore.show("Failed to delete user", "error");
-    }
   } finally {
     deleting.value = null;
   }
 }
-
-function formatDate(iso: string): string {
-  return new Date(iso).toLocaleDateString(undefined, {
-    year: "numeric",
-    month: "short",
-    day: "numeric",
-  });
-}
 </script>
 
 <template>
@@ -212,8 +195,8 @@ function formatDate(iso: string): string {
           <tbody>
             <tr v-for="inv in invitations" :key="inv.id">
               <td class="cell-email">{{ inv.email }}</td>
-              <td class="hide-mobile cell-date">{{ formatDate(inv.created_at) }}</td>
+              <td class="hide-mobile cell-date">{{ fmtDate(inv.created_at) }}</td>
-              <td class="hide-mobile cell-date">{{ formatDate(inv.expires_at) }}</td>
+              <td class="hide-mobile cell-date">{{ fmtDate(inv.expires_at) }}</td>
               <td class="cell-actions">
                 <button
                   class="btn-ghost btn-compact"
@@ -255,7 +238,7 @@ function formatDate(iso: string): string {
                 {{ u.role }}
               </span>
             </td>
-            <td class="hide-mobile cell-date">{{ formatDate(u.created_at) }}</td>
+            <td class="hide-mobile cell-date">{{ fmtDate(u.created_at) }}</td>
             <td class="cell-actions">
               <template v-if="u.id === authStore.user?.id">
                 <span class="you-label">You</span>

plugin/.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "scribe",
   "description": "Scribe system-of-record for Claude Code: MCP tools over your notes/tasks/projects/rules, a session-start push channel that surfaces your always-on rules + active-project context, process-skills (writing-plans, systematic-debugging, verification, brainstorming, reusing-code), and your saved Scribe Processes auto-surfaced as skills (/scribe:sync). Replaces superpowers + file-memory with one app-backed plugin.",
-  "version": "0.1.32",
+  "version": "0.1.37",
   "author": { "name": "Bryan Van Deusen" },
   "mcpServers": {
     "scribe": {

plugin/hooks/scribe_prior_art.sh

@@ -14,6 +14,12 @@
 # on an instance with no forge connection (decision #2707). Everything else is
 # the REUSE menu. The two dedup separately (see the state files below).
 #
+# It is also the shape ledger's write-path feed (#2791): it names the
+# definitions being written (`shapes=`), and the server — only when the
+# session has PULLED a snippet this code references or resembles — records
+# them as instance rows, classified_by=hook. Evidence, not judgment; the
+# context line says what landed so a wrong stamp is corrected in the moment.
+#
 # NEVER BLOCKS. It returns `additionalContext` with no `permissionDecision`, so
 # the write proceeds untouched and Claude sees the note beside the tool result.
 # Any failure — unconfigured, unreachable, malformed — exits 0 in silence. A
@@ -96,10 +102,14 @@ fi
 # `ReturnType name(...)`) needs a real parser, and `impl` blocks are excluded
 # because several per type is normal Rust, not duplication.
 # ---------------------------------------------------------------------------
-local_lines=""
+# kind<TAB>name for each thing a piece of code DEFINES, in source order. One
-if [ -n "$repo_root" ] && [ -n "$code" ]; then
+# program, two consumers: the local duplicate arm (every definition in the
-  # kind<TAB>name for each thing this payload DEFINES.
+# payload) and the ledger feed (#2791, below: the definitions being written,
-  names=$(printf '%s' "$code" | awk '
+# or the one enclosing an Edit). Rule-for-rule mirrored by the server's
+# services/coverage.py extract_shapes — ledger rows are keyed by what THAT
+# sees, so the two must agree on what counts as a definition.
+scribe_defs() {
+  awk '
     {
       # CSS class definition: .name { or .name,
       if (match($0, /^[[:space:]]*\.[A-Za-z][A-Za-z0-9_-]*[[:space:]]*[,{]/)) {
@@ -132,8 +142,16 @@ if [ -n "$repo_root" ] && [ -n "$code" ]; then
         if (t != "") print "sym\t" t; next
       }
     }
-  ' 2>/dev/null | sort -u | head -12) || names=""
+  ' 2>/dev/null
+}
 
+names=""
+if [ -n "$code" ]; then
+  names=$(printf '%s' "$code" | scribe_defs | sort -u | head -12) || names=""
+fi
+
+local_lines=""
+if [ -n "$repo_root" ] && [ -n "$names" ]; then
   while IFS=$'\t' read -r kind name; do
     [ -n "${name:-}" ] || continue
     case "$kind" in
@@ -156,6 +174,38 @@ if [ -n "$local_lines" ]; then
   local_context="> Already defined elsewhere in this repo — check before adding another copy (\`git grep\` shown; this is a nudge, not a gate):"$'\n'"${local_lines}"
 fi
 
+# ---------------------------------------------------------------------------
+# THE LEDGER FEED (#2791). The server keeps a shape ledger — every definition
+# in the bound repo, classified against recorded canon — and this hook is the
+# one place that sees a shape AT THE MOMENT IT IS WRITTEN. So it names the
+# shapes in play: every definition in the payload, or — for an Edit that
+# changes the inside of a function rather than its signature — the definition
+# enclosing the edit, found by walking the target file upward from the edited
+# lines. The server decides whether evidence exists (the session pulled a
+# snippet this code references or resembles) and stamps instance rows; with
+# no pulled canon in play, nothing is recorded. Titles only still — this sends
+# names, not bodies.
+# ---------------------------------------------------------------------------
+shapes="$names"
+if [ -z "$shapes" ] && [ -f "$file_path" ] && command -v tac >/dev/null 2>&1; then
+  old_first=$(printf '%s' "$event" \
+    | jq -r '.tool_input.old_string // .tool_input.old_str // empty' 2>/dev/null \
+    | grep -m1 -v '^[[:space:]]*$') || old_first=""
+  if [ -n "$old_first" ]; then
+    ln=$(grep -nF -m1 -- "$old_first" "$file_path" 2>/dev/null | cut -d: -f1) || ln=""
+    if [ -n "$ln" ]; then
+      shapes=$(head -n "$ln" "$file_path" | tac | scribe_defs | head -1) || shapes=""
+    fi
+  fi
+fi
+shapes_q=""
+if [ -n "$shapes" ]; then
+  enc=$(printf '%s\n' "$shapes" \
+    | awk -F'\t' 'NF>=2 {printf "%s%s:%s", (n++?",":""), $1, $2}' \
+    | jq -sRr '@uri' 2>/dev/null) || enc=""
+  [ -n "$enc" ] && shapes_q="&shapes=${enc}"
+fi
+
 url=${SCRIBE_URL:-${CLAUDE_PLUGIN_OPTION_API_ENDPOINT:-}}
 token=${SCRIBE_TOKEN:-${CLAUDE_PLUGIN_OPTION_API_TOKEN:-}}
 # Guard against an unexpanded ${...} placeholder arriving as a literal.
@@ -230,7 +280,7 @@ fi
 # finding that needed no instance to produce.
 body=$(curl -fsS --max-time 5 \
   -H "Authorization: Bearer ${token}" \
-  "${url%/}/api/plugin/prior-art?path=${path_enc}&code=${code_enc}${repo_q}${exclude_q}${sync_exclude_q}" 2>/dev/null) || body=""
+  "${url%/}/api/plugin/prior-art?path=${path_enc}&code=${code_enc}${repo_q}${exclude_q}${sync_exclude_q}${shapes_q}" 2>/dev/null) || body=""
 
 context=""
 if [ -n "$body" ]; then

plugin/skills/reusing-code/SKILL.md

@@ -34,6 +34,9 @@ through recall/auto-inject; this skill is the active reflex around that.
   to ask both at once.
 - If a snippet fits, pull it in full with `get_snippet(id)` and reuse it — its
   `location` points at the reference implementation. Adapt, don't re-derive.
+  The pull also does the accounting: the code you then write that references
+  or resembles it is stamped an `instance` of that canon in the shape ledger
+  (classified_by=hook) — reuse from memory leaves no row.
 - If auto-inject already surfaced a snippet title that looks relevant, that's
   your cue to `get_snippet` it rather than start from scratch.
 - **Prior art offered beside a write is not noise — read it.** When Scribe notes

plugin/skills/shape-accounting/SKILL.md

@@ -0,0 +1,113 @@
+---
+name: shape-accounting
+description: Use when a project's shape accounting needs attention — the pattern_coverage line from enter_project shows unclassified shapes or is missing on a forge-served project, the operator asks about coverage/accounting/canon, or you just proved a code-to-canon relationship (an audit enumerated call sites, a consolidation repointed consumers, a verify pass confirmed a helper's users). Triggers on "coverage", "accounted", "unclassified", "classify shapes", "what uses this", or finishing any consolidation.
+---
+
+# Shape accounting — every shape classified against canon
+
+The snippet library records **canon** (small); the shape ledger accounts for
+**every extracted definition** in a project's bound repos (total). Each ledger
+row carries a status:
+
+- `canonical` — IS a snippet's reference (the coverage sync stamps these
+  mechanically; you rarely set it).
+- `instance` of snippet N — conforms to recorded canon. Canon in another
+  project counts (a family-level button shape fully accounts for a local use).
+- `variant` of snippet N — a deliberate, named departure. **Reason required**
+  — the why IS the record.
+- `exempt` — judged genuinely one-off. **Reason required.** A recorded
+  judgment, not silence — it stops the next pass re-litigating it.
+- `scoped` — one-off **by construction**, stamped by the coverage sync
+  (a Vue component's scoped `<style>` rules and its `<script setup>`
+  functions — unreachable from any other file). Accounted for without a
+  judgment; still proposed against, grouped and flagged; any judgment you
+  make overrides it. Not the todo.
+- `unclassified` — nobody has judged it yet. **This is the todo list.**
+
+## The loop
+
+1. **Seed / refresh** — the ledger fills from coverage computation. Entering a
+   project triggers a background seed automatically; when you need it current
+   *now* (before a classification batch, or when the line is missing on a
+   forge-served project), call `refresh_pattern_coverage(project_id)` — it
+   returns the fresh accounting line. Takes seconds; it moves repo archives.
+2. **Read the todo** — `list_shapes(project_id, status="unclassified")`,
+   optionally scoped by `path` to the directories the coverage line names as
+   largest. `snippet_id=N` reads a consumer map.
+3. **Judge in batches** — `classify_shapes(project_id, [{path, symbol,
+   status, snippet_id?, reason?}])`. All-or-nothing: a bad item applies
+   nothing. Rows, never prose — a consumer list in a note or verification
+   detail cannot be sorted, queried, or diffed.
+
+## Rows that arrive on their own
+
+Two feeds keep the ledger current between your batches, so most shapes never
+need a hand judgment:
+
+- **The sync** stamps a snippet's own reference location `canonical`
+  (`classified_by: mechanical`).
+- **The write path** stamps instances as you work: when you `get_snippet` a
+  canon and then Write/Edit code that references or resembles it, the
+  definitions being written land as `instance` rows (`classified_by: hook`,
+  the evidence in `reason`), and the prior-art hook tells you what landed
+  ("Shape accounting: recorded at … → instance of #N"). Offered-but-unopened
+  snippets stamp nothing — so *pull the canon you are instantiating*; that
+  pull is what turns your reuse into accounting. A hook row is evidence, not
+  judgment: it never overrides a classification you made, and a
+  `classify_shapes` call overrides it.
+
+## The machine proposes, judgment classifies
+
+Every coverage refresh runs the **mechanical proposer** over the unclassified
+rows: same symbol as a canon elsewhere → textual containment → body
+references a canon → signature resemblance → semantic (capped per refresh). A hit
+is a *proposal* on the row, never a classification. Work the queue in bulk:
+
+1. `list_shapes(project_id, proposal="canon", snippet_id=N)` or
+   `path="dir"` — read the page; `proposal` carries snippet_id, basis, score.
+2. `confirm_shape_proposals(project_id, snippet_id=N)` (or `path=`,
+   `basis=`) for the ones that hold — hundreds at a time; `symbol` and
+   `reference` proposals are near-certain, `semantic` deserves a look.
+3. `classify_shapes` the rest — variant, exempt, or instance of a different
+   snippet. Any judgment retires the proposal.
+
+`list_shapes(project_id, proposal="derive")` lists the **derive-first
+candidates** — the same body in ≥2 places or the same name defined in ≥3
+files, with no canon at all (`proposal.group` names the family; the coverage
+payload's `derive_groups` ranks the biggest). That is the consolidation
+queue, not a classification queue: see below.
+
+## The derive-first rule
+
+N same-shaped occurrences matching **no** recorded canon is never N loose
+classifications — it is a consolidation candidate: derive one reference from
+the dominant form, `create_snippet` it, migrate the outliers, then classify
+the rest as instances. Canon is determined from the code; consistency comes
+from the derivation, not from asking permission.
+
+## The divergence readout — button B where button A is canon
+
+Three questions the ledger answers mechanically (#2793):
+
+- **Divergence** — `list_shapes(project_id, flag="divergence")` (and the
+  coverage line's "N DIVERGENT"): a shape new since the previous refresh, in
+  a directory where one canon dominates the judged siblings, that the
+  proposer did not match to that canon. `diverges_from` names the canon.
+  Judge it: `instance` if it should be built from the canon (and rebuild
+  it), `variant` with the why if the departure is deliberate. The write-path
+  hook asks the same question in-band the moment such a shape is written.
+- **History** — `shape_history(project_id, path, symbol?)`: the current rows
+  plus every `classified` / `vanished` / `reappeared` / `drifted` event with
+  its commit — "instance of #N from <date>, re-judged variant of #M because
+  R, vanished at C". Rows, not recollection.
+- **Recheck** — `list_shapes(project_id, flag="recheck")`: judged
+  instances/variants whose body changed since judged. The judgment stands;
+  re-confirm it (classify again with the same status) or re-judge.
+
+## What this buys
+
+Divergence becomes mechanical: when button B appears where button A is canon,
+the ledger says *unintended divergence* or *justified variant with its
+reason* — nobody re-derives the history. `get_snippet` shows each snippet's
+`instances` and `variants`, so "what uses this?" is answered from rows before
+any contract change lands on its consumers.

src/scribe/mcp/auth.py

@@ -4,20 +4,6 @@ from __future__ import annotations
 from scribe.services.api_keys import lookup_key
 
 
-async def resolve_bearer_to_user_id(auth_header: str | None) -> int | None:
-    """Parse an `Authorization: Bearer <token>` header and return the user_id.
-
-    Returns None if the header is missing, malformed, or the token is invalid
-    or revoked. The underlying lookup_key already updates last_used_at on hit.
-    """
-    if not auth_header or not auth_header.startswith("Bearer "):
-        return None
-    raw_token = auth_header[len("Bearer "):].strip()
-    if not raw_token:
-        return None
-    api_key = await lookup_key(raw_token)
-    return api_key.user_id if api_key else None
-
 
 async def resolve_bearer(auth_header: str | None) -> tuple[int, str] | None:
     """Resolve a Bearer token to (user_id, scope).

src/scribe/mcp/server.py

@@ -112,7 +112,7 @@ _READ_ONLY_TOOLS = frozenset({
     "list_repo_bindings",
     # The shape ledger's todo query (#2789). Reads only — classify_shapes is
     # the write, and it is deliberately NOT here.
-    "list_shapes",
+    "list_shapes", "shape_history",
 })
 
 # Read-SHAPED tools that must NOT be reachable with a read key — a getter that

src/scribe/mcp/tools/milestones.py

@@ -57,9 +57,7 @@ async def get_milestone(milestone_id: int) -> dict:
     return {
         "milestone": out,
         "steps": [t.to_dict() for t in steps],
-        "applicable_rules": applicable["rules"],
+        **rulebooks_svc.rules_payload(applicable),
-        "subscribed_rulebooks": applicable["subscribed_rulebooks"],
-        "applicable_rules_truncated": applicable["truncated"],
     }
 
 

src/scribe/mcp/tools/notes.py

@@ -62,30 +62,6 @@ async def list_notes(
     return {"notes": [n.to_dict() for n in rows], "total": total}
 
 
-async def _attach_supersession(uid: int, note_id: int, data: dict) -> None:
-    """Add both directions of the supersession relation to a note payload.
-
-    Both, because they answer different questions and only one of them is
-    obvious. `supersedes` is what the author claimed. `superseded_by` is what a
-    READER needs and what the note itself cannot know — a stale record handed
-    over without that marker gets acted on confidently, which is worse than
-    never surfacing it.
-
-    Omitted entirely when empty, so an ordinary note's payload doesn't grow two
-    permanently-empty lists. A field that always says nothing trains readers to
-    skip fields, which is the lesson `consolidated_at` cost us (#2483).
-    """
-    rel = await supersession_svc.get_relations(uid, note_id)
-    if rel["supersedes"]:
-        data["supersedes"] = rel["supersedes"]
-    if rel["superseded_by"]:
-        data["superseded_by"] = rel["superseded_by"]
-        data["superseded_note"] = (
-            "A later note claims to bring this up to date — see superseded_by. "
-            "Read this as what was true when written, and check the newer one "
-            "before acting on it."
-        )
-
 
 async def get_note(note_id: int) -> dict:
     """Fetch the full content of a single Scribe note by its ID.
@@ -113,7 +89,7 @@ async def get_note(note_id: int) -> dict:
     # snippets would leave those permanently at zero pulls and make them look
     # like dead weight next to snippets that merely had a counter (#2085).
     record_pulled(user_id=uid, note_id=int(note.id), source="mcp_get_note")
-    await _attach_supersession(uid, note_id, out)
+    await supersession_svc.attach_relations(uid, note_id, out, hint=True)
     await systems_tools.attach_systems(
         uid, getattr(note, "user_id", uid) or uid, out, note.id, note.project_id
     )
@@ -186,7 +162,7 @@ async def create_note(
             raise ValueError(str(exc)) from exc
     data = note.to_dict()
     await systems_tools.attach_systems(uid, uid, data, note.id, project_id or None)
-    await _attach_supersession(uid, note.id, data)
+    await supersession_svc.attach_relations(uid, note.id, data, hint=True)
     return data
 
 
@@ -237,7 +213,7 @@ async def update_note(
     await systems_tools.attach_systems(
         uid, getattr(note, "user_id", uid) or uid, data, note_id, note.project_id
     )
-    await _attach_supersession(uid, note_id, data)
+    await supersession_svc.attach_relations(uid, note_id, data, hint=True)
     return data
 
 

src/scribe/mcp/tools/projects.py

@@ -26,6 +26,7 @@ from scribe.services import projects as projects_svc
 from scribe.services import rulebooks as rulebooks_svc
 from scribe.services import systems as systems_svc
 from scribe.services import trash as trash_svc
+from scribe.services.background import spawn
 from scribe.services.note_usage import record_surfaced
 
 
@@ -68,7 +69,9 @@ async def enter_project(project_id: int) -> dict:
     unclassified, largest: internal/api". Unclassified IS the todo: as you
     touch code in those areas, classify the shapes you can (instances of
     recorded canon, deliberate variants, one-off exemptions) and record the
-    canon that's missing with create_snippet.
+    canon that's missing with create_snippet. A null line on a forge-served
+    project usually means the ledger is seeding in the background (entering
+    triggers it); refresh_pattern_coverage computes it on the spot.
 
     `systems` is the project's vocabulary of named subsystems/areas. It is
     returned here so you can TAG as you write: when creating or meaningfully
@@ -164,6 +167,16 @@ async def enter_project(project_id: int) -> dict:
     coverage = await coverage_svc.cached_coverage(
         project.user_id or uid, project_id
     )
+    # Arrival self-seed (#2802): a ledger that is absent or stale refreshes in
+    # the BACKGROUND — entering is the moment the number is wanted, and the
+    # UI button must not be the only path. This enter stays fast; the next
+    # one carries the line. Forge-less projects exit the seed quietly.
+    spawn(
+        coverage_svc.refresh_if_stale(
+            project.user_id or uid, project_id, cached=coverage
+        ),
+        site="enter_project.coverage_seed",
+    )
 
     out = {
         "project": project.to_dict(),
@@ -179,12 +192,7 @@ async def enter_project(project_id: int) -> dict:
         ],
         "design_system": design_system,
         "milestone_summary": milestone_summary,
-        "applicable_rules": applicable["rules"],
+        **rulebooks_svc.rules_payload(applicable),
-        "project_rules": applicable.get("project_rules", []),
-        "suppressed_rules": applicable.get("suppressed_rules", []),
-        "suppressed_topics": applicable.get("suppressed_topics", []),
-        "subscribed_rulebooks": applicable["subscribed_rulebooks"],
-        "applicable_rules_truncated": applicable["truncated"],
         "open_tasks": [
             {
                 "id": t.id, "title": t.title, "status": t.status,
@@ -226,12 +234,7 @@ async def get_project(project_id: int) -> dict:
     applicable = await rulebooks_svc.get_applicable_rules(
         project_id=project_id, user_id=uid,
     )
-    data["applicable_rules"] = applicable["rules"]
+    data.update(rulebooks_svc.rules_payload(applicable))
-    data["applicable_rules_truncated"] = applicable["truncated"]
-    data["subscribed_rulebooks"] = applicable["subscribed_rulebooks"]
-    data["project_rules"] = applicable.get("project_rules", [])
-    data["suppressed_rules"] = applicable.get("suppressed_rules", [])
-    data["suppressed_topics"] = applicable.get("suppressed_topics", [])
     return data
 
 

src/scribe/mcp/tools/repos.py

@@ -13,28 +13,43 @@ from scribe.services import projects as projects_svc
 from scribe.services import repo_bindings as repo_bindings_svc
 
 
-async def bind_repo(repo_url: str, project_id: int) -> dict:
+async def bind_repo(repo_url: str, project_id: int, ref: str = "") -> dict:
     """Bind a git repository to a Scribe project for session-start context.
 
     After this, any session started in that repo auto-loads the project's
     context (the SessionStart hook sends the repo's remote; the server resolves
     it here). Idempotent — re-binding the same repo updates the target project.
 
+    The binding is also what the shape ledger reads (refresh_pattern_coverage):
+    `ref` names the branch it follows. Default (""): the repo's default branch
+    — which means the ledger only sees work after a merge. A dev-first project
+    (rule 1: dev is home) should bind with ref="dev" so classification follows
+    the push, not the merge. Re-binding with ref="" keeps the standing ref;
+    pass ref="-" to clear it back to the default branch.
+
     Args:
         repo_url: the repo's git remote (e.g. the output of
             `git remote get-url origin` — ssh or https form, both work).
         project_id: the Scribe project this repo represents.
+        ref: branch the ledger follows ("" = leave as is / default branch on
+            a new binding; "-" = clear to the default branch).
     """
     uid = current_user_id()
     project = await projects_svc.get_project(uid, project_id)
     if project is None:
         raise ValueError(f"project {project_id} not found")
-    binding = await repo_bindings_svc.set_binding(uid, repo_url, project_id)
+    ref_arg = None if not ref else ("" if ref.strip() == "-" else ref)
+    binding = await repo_bindings_svc.set_binding(uid, repo_url, project_id, ref_arg)
+    follows = binding.ref or "the default branch"
     return {
         "repo_key": binding.repo_key,
         "project_id": binding.project_id,
         "project_title": project.title,
-        "message": f"Bound `{binding.repo_key}` -> {project.title} (id {project.id}).",
+        "ref": binding.ref,
+        "message": (
+            f"Bound `{binding.repo_key}` -> {project.title} (id {project.id}); "
+            f"the ledger follows {follows}."
+        ),
     }
 
 

src/scribe/mcp/tools/rulebooks.py

@@ -193,6 +193,12 @@ async def delete_topic(topic_id: int, confirmed: bool = False) -> dict:
 
 # ── Rule CRUD ──────────────────────────────────────────────────────────
 
+def _rule_summary(r) -> dict:
+    """The list-row shape for a rule: what an agent needs to APPLY it. The
+    full record (why, how_to_apply, timestamps) is get_rule's job."""
+    return {"id": r.id, "title": r.title, "statement": r.statement, "topic_id": r.topic_id}
+
+
 async def list_rules(
     rulebook_id: int = 0, topic_id: int = 0, project_id: int = 0,
 ) -> dict:
@@ -213,16 +219,7 @@ async def list_rules(
         topic_id=topic_id or None,
         project_id=project_id or None,
     )
-    return {
+    return {"rules": [_rule_summary(r) for r in rows], "total": len(rows)}
-        "rules": [
-            {
-                "id": r.id, "title": r.title, "statement": r.statement,
-                "topic_id": r.topic_id,
-            }
-            for r in rows
-        ],
-        "total": len(rows),
-    }
 
 
 async def list_always_on_rules() -> dict:
@@ -235,16 +232,7 @@ async def list_always_on_rules() -> dict:
     """
     uid = current_user_id()
     rules = await rulebooks_svc.list_always_on_rules(uid)
-    return {
+    return {"rules": [_rule_summary(r) for r in rules], "total": len(rules)}
-        "rules": [
-            {
-                "id": r.id, "title": r.title, "statement": r.statement,
-                "topic_id": r.topic_id,
-            }
-            for r in rules
-        ],
-        "total": len(rules),
-    }
 
 
 async def get_rule(rule_id: int) -> dict:

src/scribe/mcp/tools/shapes.py

@@ -9,6 +9,7 @@ refresh; these tools only ever judge what the sync has seen.
 from __future__ import annotations
 
 from scribe.mcp._context import current_user_id
+from scribe.services import coverage as coverage_svc
 from scribe.services import shape_ledger as shape_ledger_svc
 
 
@@ -35,10 +36,20 @@ async def classify_shapes(
     Args:
         project_id: The project whose ledger is being judged.
         classifications: Objects of {path, symbol, status, kind?, snippet_id?,
-            reason?}. path+symbol name the shape exactly as list_shapes shows
+            reason?, reason_code?}. path+symbol name the shape exactly as
-            it; kind ("sym"/"css") narrows when one file defines both.
+            list_shapes shows it; kind ("sym"/"css") narrows when one file
-            snippet_id is required for canonical/instance/variant; reason is
+            defines both. snippet_id is required for canonical/instance/
-            required for variant/exempt.
+            variant; reason is required for variant/exempt. reason_code is
+            an OPTIONAL index beside the prose (one of: scoped-css,
+            one-off-handler, test-helper, convention-plumbing, pure-helper,
+            generated, script, typed-record) so the ledger can be filtered
+            and aggregated by kind of one-off — the prose stays the record.
+            uses is an OPTIONAL list of snippet ids this shape CALLS (#2870):
+            conformance (status + snippet_id) says what shape it is, uses
+            says which canonical helpers it consumes — a service function
+            can be an instance of the service-function convention AND use
+            hash_token. Consumer maps are uses edges; list_shapes(uses=N)
+            and get_snippet's `uses` read them.
         via: Who is judging — "agent" (default), "audit" (a sweep), or
             "import" (carrying maps recorded elsewhere).
 
@@ -61,6 +72,10 @@ async def list_shapes(
     include_vanished: bool = False,
     limit: int = 100,
     offset: int = 0,
+    proposal: str = "",
+    flag: str = "",
+    compact: bool = False,
+    uses: int = 0,
 ) -> dict:
     """Read a project's shape ledger — `status="unclassified"` IS the todo.
 
@@ -68,28 +83,232 @@ async def list_shapes(
     (fed by the coverage refresh). Filters compose:
 
     Args:
-        status: canonical | instance | variant | exempt | unclassified.
+        status: canonical | instance | variant | exempt | scoped | unclassified.
+            `scoped` (#2869) is the sync's mechanical stamp on one-offs by
+            construction (a Vue component's scoped <style> rules and its
+            <script setup> functions): accounted for, not judged, still
+            proposed against / grouped / flagged, and overridable by any
+            classify_shapes judgment. The human todo is `unclassified`.
         path: exact file, or a directory — matches everything beneath it
             (the coverage line's "largest" dirs go straight in here).
-        snippet_id: rows classified against this snippet — a consumer map.
+        snippet_id: rows classified against this snippet (instance/variant
+            of it — conformance).
+        uses: rows that CALL this snippet (#2870) — the consumer map proper,
+            whatever shape each row is itself; edges come from judgments
+            (classify_shapes uses=), the write-path hook, and the proposer's
+            by-name reference hits.
         include_vanished: include shapes no longer in the tree (history).
         limit/offset: page through big ledgers (limit caps at 500).
+        compact: rows as `path · symbol · kind · status · signature` plus
+            snippet_id / by / proposal / diverges_from / recheck only when
+            set — no commits, shas or timestamps. THE form for an audit:
+            a full 500-row page fits the tool budget. The default rows carry
+            everything (shape_history-grade bookkeeping).
+        proposal: the proposer's queue (#2792) — "any", "canon" (rows the
+            machine thinks are an instance of a snippet: `proposal` carries
+            snippet_id, basis, score), "derive" (rows that repeat with NO
+            canon: `proposal.group` names the family), or one basis
+            (symbol/text/reference/signature/semantic).
+        flag: the divergence readout (#2793) — "divergence": shapes new
+            since the previous refresh in a directory where one canon
+            dominates the judged siblings and NOT proposed as that canon
+            (`diverges_from` names it: button B where button A is canon —
+            classify it: instance if it should use the canon, variant with
+            the why if deliberate); "recheck": judged instances/variants
+            whose body changed since judged (the judgment stands; confirm
+            it again with classify_shapes, or re-judge).
 
     Returns {"shapes": [...], "total": N} — total counts every match, not
-    just this page. Classify what you can judge with classify_shapes; a
+    just this page. Each row's `classified_by` says who judged: agent /
-    repeating shape with NO recorded canon is a derive-one-first moment
+    audit / import are judgments; `mechanical` is the canonical stamp the
-    (consolidate onto a reference, create_snippet it, then classify the
+    sync applies; `hook` is write-path EVIDENCE (#2791) — the session pulled
-    rest against it), never N loose classifications.
+    a snippet and then wrote code referencing/resembling it, so the shape
+    was stamped an instance with the evidence in `reason`. A hook row is
+    overridable by any classify_shapes call; it never overrides yours.
+
+    THE FAST PATH through a big todo is the proposer's queue: every coverage
+    refresh matches unclassified shapes against canon (strongest basis
+    first: same symbol elsewhere → textual containment → body references
+    the canon → signature resemblance → semantic) and attaches a
+    `proposal` to each row it can speak for. Review `proposal="canon"` by
+    snippet or directory, then confirm_shape_proposals the ones that hold —
+    hundreds at a time — and classify_shapes the rest (variant/exempt, or
+    instance of a different snippet). `proposal="derive"` lists the
+    derive-first candidates: a repeating shape with NO recorded canon is
+    never N loose classifications — consolidate onto a reference,
+    create_snippet it, then classify the group against it.
     """
     uid = current_user_id()
     rows, total = await shape_ledger_svc.list_project_shapes(
         uid, project_id,
         status=status, path=path, snippet_id=snippet_id,
         include_vanished=include_vanished, limit=limit, offset=offset,
+        proposal=proposal, flag=flag, uses=uses,
     )
-    return {"shapes": [r.to_dict() for r in rows], "total": total}
+    return {
+        "shapes": [r.to_compact() if compact else r.to_dict() for r in rows],
+        "total": total,
+    }
+
+
+async def classify_shapes_by_rule(
+    project_id: int,
+    path: str,
+    status: str,
+    pattern: str = "",
+    kind: str = "",
+    snippet_id: int = 0,
+    reason: str = "",
+    via: str = "agent",
+    include_judged: bool = False,
+    reason_code: str = "",
+    uses: list[int] | None = None,
+) -> dict:
+    """The sweep form of classify_shapes: ONE judgment applied to every
+    unclassified shape under a directory whose symbol matches a glob.
+
+    For the long tail an audit judges by family, not by row — "every scoped
+    rule under frontend/src/views is exempt: styles one element of its view",
+    "every `*_scheduler.py` symbol is an instance of ScheduledJob" — where
+    listing 900 rows and sending them back is the whole cost. The row form
+    stays the precise tool; reach for it when each row gets its own reason.
+
+    Args:
+        project_id: The project whose ledger is being judged.
+        path: A file, or a directory and everything beneath it. Required —
+            a sweep names what it judges.
+        status: instance | variant | exempt | unclassified (canonical is the
+            sync's stamp, not a sweep's).
+        pattern: Shell glob on the symbol (`*_rows`, `_*`, `modal-*`, `*`);
+            "" = every symbol under path.
+        kind: "sym" or "css" to narrow; "" = both.
+        snippet_id: Required for instance/variant — the canon judged against.
+        reason: Required for variant/exempt — the why, recorded on every row.
+        via: "agent" (default) | "audit" | "import".
+        reason_code: Optional catalogue code beside the reason (see
+            classify_shapes) — a sweep is exactly where one applies.
+        uses: Optional snippet ids every matched shape CALLS (#2870) — e.g.
+            "every *_scheduler.py symbol uses ScheduledJob".
+        include_judged: By default only unjudged rows are touched —
+            `unclassified` and the sync's mechanical `scoped` stamp — a
+            sweep never silently overwrites a judgment. True re-judges every
+            matching live row (use to re-confirm after a recheck, or to
+            revise a family you judged earlier).
+
+    One transaction: applies whole or not at all. Returns
+    {"classified": N, "sample": ["path::symbol", ...]} (first 12, sorted)
+    so you can see what the rule reached; N = 0 means the rule matched
+    nothing live and unclassified — widen the pattern or refresh coverage.
+    """
+    uid = current_user_id()
+    try:
+        return await shape_ledger_svc.classify_shapes_where(
+            uid, project_id, path=path, status=status, pattern=pattern,
+            kind=kind, snippet_id=snippet_id or None, reason=reason or None,
+            via=via, include_judged=include_judged,
+            reason_code=reason_code or None, uses=uses or None,
+        )
+    except ValueError as exc:
+        return {"error": str(exc)}
+
+
+async def shape_history(
+    project_id: int, path: str, symbol: str = "", limit: int = 200
+) -> dict:
+    """What was used here, when, and why — a shape's (or a directory's)
+    history from the ledger (#2793).
+
+    `shapes` are the current rows at `path` (a file, or a directory and
+    everything beneath it; `symbol` narrows to one definition) with
+    first/last-seen commits, vanished_at, and the standing judgment;
+    `events` are the state changes, oldest first: `classified` (status,
+    snippet_id, who, why — one per judgment, so a shape that was an instance
+    of #N and later a variant of #M shows both), `vanished`, `reappeared`,
+    `drifted` (the body moved under a judgment; see list_shapes flag=
+    "recheck"). Each event carries the commit the tree was read at.
+
+    Read it as a timeline: "instance of #N from <first classified at>,
+    re-judged variant of #M at <at> because <reason>, vanished at <commit>".
+    Read-only; requires read access to the project.
+    """
+    uid = current_user_id()
+    return await shape_ledger_svc.shape_history(
+        uid, project_id, path, symbol=symbol, limit=limit
+    )
+
+
+async def confirm_shape_proposals(
+    project_id: int,
+    snippet_id: int = 0,
+    path: str = "",
+    basis: str = "",
+    min_score: float = 0.0,
+) -> dict:
+    """Confirm the proposer's canon proposals you have reviewed, in batch.
+
+    The machine proposes, judgment classifies (#2792): each matching row —
+    live, unclassified, carrying a `proposal` with a snippet_id — becomes
+    `instance` of that snippet, classified_by="agent", reason naming the
+    basis and score. Narrow to what you actually looked at: at least one of
+    snippet_id (confirm one canon's whole queue after reading its
+    `list_shapes(proposal="canon", ...)` page), path (a directory you
+    audited), or basis (e.g. "symbol" and "reference" are near-certain;
+    "semantic" deserves a look first) is required — a bare confirm-all is
+    not a judgment. min_score trims a basis's tail.
+
+    Proposals you do NOT confirm are judged with classify_shapes (variant,
+    exempt, or instance of a different snippet) — any judgment retires the
+    proposal. Requires write access. Returns {"confirmed": N}.
+    """
+    uid = current_user_id()
+    try:
+        return await shape_ledger_svc.confirm_proposals(
+            uid, project_id, snippet_id=snippet_id, path=path, basis=basis,
+            min_score=min_score,
+        )
+    except ValueError as exc:
+        return {"error": str(exc)}
+
+
+async def refresh_pattern_coverage(project_id: int) -> dict:
+    """Seed or refresh the project's shape ledger NOW, and return the readout.
+
+    The synchronous form of the arrival-moment background seed (#2802):
+    downloads the bound repos through the OWNER's forge connections, upserts
+    every extracted shape into the ledger (new shapes arrive `unclassified`),
+    re-stamps snippet reference locations as canonical, and recomputes the
+    accounting. Reach for it when the ledger must be current before you act —
+    a classification batch about to run, a coverage question asked directly —
+    rather than waiting on the background seed an enter_project triggers.
+
+    Takes seconds, not milliseconds (it moves repo archives). Requires write
+    access to the project. Errors name the fix: no forge connection → the
+    owner adds one (Settings → Integrations → Git Forges); no served repo →
+    bind_repo on a host a connection serves.
+
+    The refresh is also when the mechanical proposer runs (#2792): with the
+    repo bodies in hand it matches every changed unclassified shape against
+    canon and records proposals (see list_shapes proposal=), then regroups
+    the derive-first candidates. Semantic matching is capped per refresh, so
+    a large ledger's queue grows across refreshes rather than in one.
+
+    Returns the accounting payload — total, accounted, counts by status,
+    unclassified, repos, largest_gaps, `proposed` (canon proposals awaiting
+    confirmation), `derive_groups` (the biggest repeats-with-no-canon
+    families), `proposer` (what this refresh examined) — plus
+    `pattern_coverage`, the same one-line summary enter_project carries.
+    """
+    uid = current_user_id()
+    coverage = await coverage_svc.refresh_for_caller(uid, project_id)
+    return {
+        "pattern_coverage": coverage_svc.coverage_line(coverage),
+        **coverage,
+    }
 
 
 def register(mcp) -> None:
-    for fn in (classify_shapes, list_shapes):
+    for fn in (
+        classify_shapes, classify_shapes_by_rule, list_shapes,
+        refresh_pattern_coverage, confirm_shape_proposals, shape_history,
+    ):
         mcp.tool(name=fn.__name__)(fn)

src/scribe/mcp/tools/snippets.py

@@ -245,6 +245,10 @@ async def get_snippet(snippet_id: int) -> dict:
         data["instances"] = consumers["instances"]
     if consumers["variants"]:
         data["variants"] = consumers["variants"]
+    if consumers.get("uses"):
+        # The call sites (#2870): shapes that use this snippet, whatever
+        # shape they are themselves.
+        data["uses"] = consumers["uses"]
     return data
 
 

src/scribe/mcp/tools/systems.py

@@ -134,7 +134,7 @@ async def attach_systems(
     tagged record shows its areas (the touching-a-System reflex needs the
     affiliation visible on read, not just settable on write), an untagged
     project record carries the question instead. Neither field is ever
-    attached empty (same reasoning as notes._attach_supersession / #2483 — a
+    attached empty (same reasoning as supersession_svc.attach_relations / #2483 — a
     field that always says nothing trains readers to skip fields). The hint
     goes only to the record's owner: tagging someone else's record in someone
     else's project is not the caller's call to make. Fail-open — decoration

src/scribe/mcp/tools/tasks.py

@@ -97,12 +97,7 @@ async def get_task(task_id: int) -> dict:
         applicable = await rulebooks_svc.get_applicable_rules(
             project_id=note.project_id, user_id=uid,
         )
-        data["applicable_rules"] = applicable["rules"]
+        data.update(rulebooks_svc.rules_payload(applicable))
-        data["subscribed_rulebooks"] = applicable["subscribed_rulebooks"]
-        data["applicable_rules_truncated"] = applicable["truncated"]
-        data["project_rules"] = applicable.get("project_rules", [])
-        data["suppressed_rules"] = applicable.get("suppressed_rules", [])
-        data["suppressed_topics"] = applicable.get("suppressed_topics", [])
     data.update(await access_svc.describe_provenance(uid, note))
     # Same reasoning as get_note's record_pulled, and this is the tool where it
     # matters MOST: auto-inject ranks kind-blind over a corpus that is

src/scribe/models/__init__.py

@@ -44,6 +44,6 @@ from scribe.models.rulebook import (  # noqa: E402, F401
 )
 from scribe.models.repo_binding import RepoBinding  # noqa: E402, F401
 from scribe.models.forge_connection import ForgeConnection  # noqa: E402, F401
-from scribe.models.code_shape import CodeShape  # noqa: E402, F401
+from scribe.models.code_shape import CodeShape, CodeShapeEvent, CodeShapeUse  # noqa: E402, F401
 from scribe.models.system import System, RecordSystem  # noqa: E402, F401
 from scribe.models.design_system import DesignSystem, DesignToken  # noqa: E402, F401

src/scribe/models/api_key.py

@@ -4,7 +4,7 @@ from sqlalchemy import DateTime, ForeignKey, Index, Integer, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import CreatedAtMixin
+from scribe.models.base import CreatedAtMixin, iso
 
 
 class ApiKey(Base, CreatedAtMixin):
@@ -36,7 +36,7 @@ class ApiKey(Base, CreatedAtMixin):
             "name": self.name,
             "key_prefix": self.key_prefix,
             "scope": self.scope,
-            "last_used_at": self.last_used_at.isoformat() if self.last_used_at else None,
+            "last_used_at": iso(self.last_used_at),
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
-            "revoked_at": self.revoked_at.isoformat() if self.revoked_at else None,
+            "revoked_at": iso(self.revoked_at),
         }

src/scribe/models/app_log.py

@@ -4,6 +4,7 @@ from sqlalchemy import DateTime, Float, Index, Integer, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
+from scribe.models.base import iso
 
 
 class AppLog(Base):
@@ -20,6 +21,9 @@ class AppLog(Base):
     duration_ms: Mapped[float | None] = mapped_column(Float, nullable=True)
     ip_address: Mapped[str | None] = mapped_column(Text, nullable=True)
     details: Mapped[str | None] = mapped_column(Text, nullable=True)
+    # Declared here rather than via CreatedAtMixin on purpose: the composite
+    # index below orders on `created_at.desc()`, which needs the column object
+    # in this class body — a mixin's column is not in scope there.
     created_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
     )
@@ -44,5 +48,5 @@ class AppLog(Base):
             "duration_ms": self.duration_ms,
             "ip_address": self.ip_address,
             "details": self.details,
-            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "created_at": iso(self.created_at),
         }

src/scribe/models/base.py

@@ -1,9 +1,19 @@
-from datetime import datetime, timezone
+from datetime import date, datetime, timezone
 
 from sqlalchemy import DateTime, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 
+def iso(value: datetime | date | None) -> str | None:
+    """ISO-8601 for a payload, None for an unset column.
+
+    Every model's to_dict serialises timestamps through this one helper so a
+    row read before flush (created_at still None) and a nullable column both
+    come out as null instead of raising on `.isoformat()`.
+    """
+    return value.isoformat() if value else None
+
+
 class SoftDeleteMixin:
     """Recoverable-delete columns. NULL deleted_at = live row. deleted_batch_id
     groups rows soft-deleted in one operation so a cascade restores as a unit."""

src/scribe/models/code_shape.py

@@ -1,8 +1,9 @@
-from datetime import datetime
+from datetime import datetime, timezone
 
 from sqlalchemy import (
     BigInteger,
     DateTime,
+    Float,
     ForeignKey,
     Index,
     Integer,
@@ -12,13 +13,39 @@ from sqlalchemy import (
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import TimestampMixin
+from scribe.models.base import TimestampMixin, iso
 
 # The classification vocabulary (note 2786). `unclassified` is the default and
-# THE todo state; every other status is a judgment, stamped with who made it.
+# THE todo state; every other status is a judgment, stamped with who made it —
-SHAPE_STATUSES = ("canonical", "instance", "variant", "exempt", "unclassified")
+# except `scoped` (#2869): the coverage sync's mechanical stamp on shapes that
+# are one-offs BY CONSTRUCTION (a Vue component's scoped <style> rules and its
+# <script setup> functions — unreachable from any other file). Scoped rows are
+# accounted for without a human judging them, so `exempt` keeps meaning "a
+# person looked"; the proposer, derive grouping and divergence still see them,
+# and any judgment (instance/variant/exempt) overrides the stamp.
+SHAPE_STATUSES = ("canonical", "instance", "variant", "exempt", "scoped", "unclassified")
 SHAPE_CLASSIFIERS = ("agent", "audit", "hook", "mechanical", "import")
 
+# The reason catalogue (#2874): an OPTIONAL code beside the prose reason on
+# variant/exempt rows, so the ledger can be filtered and aggregated by kind
+# of one-off. The prose remains the record; the code is the index.
+REASON_CODES = (
+    "scoped-css",            # a scoped rule styling one element (pre-#2869 rows)
+    "one-off-handler",       # a view/component handler or loader, one per surface
+    "test-helper",           # a test module's stub, driver or fixture data
+    "convention-plumbing",   # registration, wiring, app factory — one of each
+    "pure-helper",           # a sync module-private helper with no session
+    "generated",             # generated source (theme.css, protos, bundles)
+    "script",                # a standalone dev/CI script
+    "typed-record",          # a NamedTuple / dataclass / error class — one each
+)
+
+# How the mechanical proposer (#2792) arrived at a proposal, strongest first.
+# `derive` is the odd one out: not "this is an instance of #N" but "this
+# shape repeats with NO canon — derive one first" (note 2786's derive-first
+# rule), so it carries a group key instead of a snippet.
+PROPOSAL_BASES = ("symbol", "text", "reference", "signature", "semantic", "derive")
+
 
 class CodeShape(Base, TimestampMixin):
     """One extracted code shape and its classification against canon (#2787).
@@ -42,6 +69,29 @@ class CodeShape(Base, TimestampMixin):
     snippet_id is SET NULL on snippet deletion: the classification's target
     is gone but the judgment happened; the sync pass (step 2) re-files such
     rows as unclassified so they rejoin the todo instead of dangling.
+
+    `signature` / `body_sha` (#2792) are the shape's content fingerprint —
+    its definition line and a whitespace/comment-insensitive hash of its
+    block — refreshed by every sync. They are what the mechanical proposer
+    matches on and what a later drift recheck compares against; the ledger
+    still never stores code bodies.
+
+    `classified_sha` remembers the fingerprint a judgment was made at;
+    when a later sync sees the body change under an instance/variant, the
+    row is flagged `recheck_at` (the judgment stands, it just asks to be
+    confirmed again) and a `drifted` event is written. `diverges_from`
+    (#2793) is the button-B flag: a shape new since the previous refresh, in
+    a directory+kind where one canon dominates the judged siblings, that the
+    proposer did not match to that canon — "button B appeared where button
+    A is canon: divergence or variant? classify it." Both clear on judgment.
+
+    The proposal columns hold the proposer's standing suggestion for an
+    UNCLASSIFIED row: `proposed_snippet_id` + `proposal_basis` + score for
+    "looks like an instance of #N", or `proposal_basis="derive"` +
+    `proposal_group` for "repeats with no canon". `proposed_sha` is the
+    body_sha the row was last examined at, so a refresh re-examines only
+    what changed. A judgment clears the proposal — the machine proposes,
+    judgment classifies.
     """
 
     __tablename__ = "code_shapes"
@@ -52,6 +102,8 @@ class CodeShape(Base, TimestampMixin):
         ),
         Index("ix_code_shapes_project_status", "project_id", "status"),
         Index("ix_code_shapes_snippet", "snippet_id"),
+        Index("ix_code_shapes_proposed", "project_id", "proposed_snippet_id"),
+        Index("ix_code_shapes_diverges", "project_id", "diverges_from"),
     )
 
     id: Mapped[int] = mapped_column(primary_key=True)
@@ -67,6 +119,7 @@ class CodeShape(Base, TimestampMixin):
         BigInteger, ForeignKey("notes.id", ondelete="SET NULL"), nullable=True
     )
     reason: Mapped[str | None] = mapped_column(Text, nullable=True)
+    reason_code: Mapped[str | None] = mapped_column(Text, nullable=True)   # REASON_CODES (#2874)
     classified_by: Mapped[str | None] = mapped_column(Text, nullable=True)
     classified_at: Mapped[datetime | None] = mapped_column(
         DateTime(timezone=True), nullable=True
@@ -76,6 +129,38 @@ class CodeShape(Base, TimestampMixin):
     vanished_at: Mapped[datetime | None] = mapped_column(
         DateTime(timezone=True), nullable=True
     )
+    signature: Mapped[str] = mapped_column(Text, default="")
+    body_sha: Mapped[str] = mapped_column(Text, default="")
+    proposed_snippet_id: Mapped[int | None] = mapped_column(
+        BigInteger, ForeignKey("notes.id", ondelete="SET NULL"), nullable=True
+    )
+    proposal_basis: Mapped[str | None] = mapped_column(Text, nullable=True)
+    proposal_score: Mapped[float | None] = mapped_column(Float, nullable=True)
+    proposal_group: Mapped[str | None] = mapped_column(Text, nullable=True)
+    proposed_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )
+    proposed_sha: Mapped[str] = mapped_column(Text, default="")
+    classified_sha: Mapped[str] = mapped_column(Text, default="")
+    recheck_at: Mapped[datetime | None] = mapped_column(
+        DateTime(timezone=True), nullable=True
+    )
+    diverges_from: Mapped[int | None] = mapped_column(
+        BigInteger, ForeignKey("notes.id", ondelete="SET NULL"), nullable=True
+    )
+
+    @property
+    def proposal(self) -> dict | None:
+        """The standing proposal as one object, or None when the proposer
+        has nothing to say about this row."""
+        if self.proposed_snippet_id is None and not self.proposal_group:
+            return None
+        out: dict = {"basis": self.proposal_basis, "score": self.proposal_score}
+        if self.proposed_snippet_id is not None:
+            out["snippet_id"] = self.proposed_snippet_id
+        if self.proposal_group:
+            out["group"] = self.proposal_group
+        return out
 
     def to_dict(self) -> dict:
         return {
@@ -88,11 +173,150 @@ class CodeShape(Base, TimestampMixin):
             "status": self.status,
             "snippet_id": self.snippet_id,
             "reason": self.reason,
+            "reason_code": self.reason_code,
             "classified_by": self.classified_by,
-            "classified_at": self.classified_at.isoformat() if self.classified_at else None,
+            "classified_at": iso(self.classified_at),
             "first_seen_commit": self.first_seen_commit,
             "last_seen_commit": self.last_seen_commit,
-            "vanished_at": self.vanished_at.isoformat() if self.vanished_at else None,
+            "vanished_at": iso(self.vanished_at),
-            "created_at": self.created_at.isoformat(),
+            "signature": self.signature,
-            "updated_at": self.updated_at.isoformat(),
+            "body_sha": self.body_sha,
+            "proposal": self.proposal,
+            "classified_sha": self.classified_sha,
+            "recheck_at": iso(self.recheck_at),
+            "diverges_from": self.diverges_from,
+            "created_at": iso(self.created_at),
+            "updated_at": iso(self.updated_at),
+        }
+
+    def to_compact(self) -> dict:
+        """The row as an audit reads it (#2868): identity, standing, the
+        definition line and the proposer's word — none of the bookkeeping
+        (commits, shas, timestamps). A 500-row page of these fits the tool
+        budget; a page of to_dict() does not."""
+        out = {
+            "path": self.path,
+            "symbol": self.symbol,
+            "kind": self.kind,
+            "status": self.status,
+            "signature": self.signature,
+        }
+        if self.snippet_id is not None:
+            out["snippet_id"] = self.snippet_id
+        if self.classified_by:
+            out["by"] = self.classified_by
+        if self.reason_code:
+            out["reason_code"] = self.reason_code
+        proposal = self.proposal
+        if proposal:
+            out["proposal"] = proposal
+        if self.diverges_from is not None:
+            out["diverges_from"] = self.diverges_from
+        if self.recheck_at is not None:
+            out["recheck"] = True
+        return out
+
+
+# How a uses edge was established (#2870): who/what said "this shape calls
+# that canon". `reference` is the proposer's mechanical by-name hit on the
+# body (language-gated, #2871); `hook` is write-path evidence (pulled the
+# snippet, then wrote code naming its symbol); agent/audit/import are
+# judgments carried on classify_shapes(..., uses=[...]).
+USE_BASES = ("reference", "hook", "agent", "audit", "import")
+
+
+class CodeShapeUse(Base):
+    """One consumption edge: shape → canonical snippet it calls/uses (#2870).
+
+    Conformance (CodeShape.status/snippet_id) answers "what shape is this";
+    this table answers "what does it use" — many per shape. A service function
+    that is an instance of the service-function convention AND a consumer of
+    hash_token has one snippet_id and one uses edge. Cascades with both ends:
+    a use of a deleted snippet is no longer a fact worth keeping.
+    """
+
+    __tablename__ = "code_shape_uses"
+    __table_args__ = (
+        UniqueConstraint("shape_id", "snippet_id", name="uq_code_shape_uses_shape_snippet"),
+        Index("ix_code_shape_uses_snippet", "snippet_id"),
+    )
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    shape_id: Mapped[int] = mapped_column(
+        Integer, ForeignKey("code_shapes.id", ondelete="CASCADE"), nullable=False
+    )
+    snippet_id: Mapped[int] = mapped_column(
+        Integer, ForeignKey("notes.id", ondelete="CASCADE"), nullable=False
+    )
+    basis: Mapped[str] = mapped_column(Text, nullable=False)
+    evidence: Mapped[str | None] = mapped_column(Text, nullable=True)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, default=lambda: datetime.now(timezone.utc)
+    )
+
+    def to_dict(self) -> dict:
+        return {
+            "id": self.id,
+            "shape_id": self.shape_id,
+            "snippet_id": self.snippet_id,
+            "basis": self.basis,
+            "evidence": self.evidence,
+            "created_at": iso(self.created_at),
+        }
+
+
+# What a shape's history records (#2793). Not "appeared" — first_seen and
+# created_at already say that on the row; history is for what CHANGED:
+SHAPE_EVENTS = ("classified", "vanished", "reappeared", "drifted")
+
+
+class CodeShapeEvent(Base):
+    """One state change in a shape's life — the what-was-used-when record.
+
+    "We used #N here from <date>, #M replaced it at commit C, reason R" is a
+    question the ledger row alone cannot answer once it has moved on; this
+    table keeps each judgment (status, snippet, who, why, at which commit)
+    and each presence change (vanished / reappeared / drifted) as it
+    happened. Denormalised path/symbol/kind so a directory's history reads
+    without joining; `snippet_id` is deliberately FK-free — history outlives
+    the snippet it names, which is the point.
+    """
+
+    __tablename__ = "code_shape_events"
+    __table_args__ = (
+        Index("ix_code_shape_events_shape", "shape_id", "at"),
+        Index("ix_code_shape_events_project_path", "project_id", "path"),
+    )
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    shape_id: Mapped[int] = mapped_column(
+        Integer, ForeignKey("code_shapes.id", ondelete="CASCADE"), nullable=False
+    )
+    project_id: Mapped[int] = mapped_column(Integer, nullable=False)
+    path: Mapped[str] = mapped_column(Text, nullable=False)
+    symbol: Mapped[str] = mapped_column(Text, nullable=False)
+    kind: Mapped[str] = mapped_column(Text, nullable=False)
+    event: Mapped[str] = mapped_column(Text, nullable=False)
+    status: Mapped[str | None] = mapped_column(Text, nullable=True)
+    snippet_id: Mapped[int | None] = mapped_column(BigInteger, nullable=True)
+    classified_by: Mapped[str | None] = mapped_column(Text, nullable=True)
+    reason: Mapped[str | None] = mapped_column(Text, nullable=True)
+    commit: Mapped[str] = mapped_column(Text, default="")
+    at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
+
+    def to_dict(self) -> dict:
+        return {
+            "id": self.id,
+            "shape_id": self.shape_id,
+            "project_id": self.project_id,
+            "path": self.path,
+            "symbol": self.symbol,
+            "kind": self.kind,
+            "event": self.event,
+            "status": self.status,
+            "snippet_id": self.snippet_id,
+            "classified_by": self.classified_by,
+            "reason": self.reason,
+            "commit": self.commit,
+            "at": iso(self.at),
         }

src/scribe/models/design_system.py

@@ -20,7 +20,7 @@ from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import SoftDeleteMixin, TimestampMixin
+from scribe.models.base import SoftDeleteMixin, TimestampMixin, iso
 
 
 class DesignSystem(Base, TimestampMixin, SoftDeleteMixin):
@@ -56,8 +56,8 @@ class DesignSystem(Base, TimestampMixin, SoftDeleteMixin):
             "description": self.description or "",
             "guidance": self.guidance or "",
             "parent_id": self.parent_id,
-            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+            "updated_at": iso(self.updated_at),
         }
 
 
@@ -153,6 +153,6 @@ class DesignToken(Base, TimestampMixin, SoftDeleteMixin):
             "rationale": self.rationale,
             "supersedes": self.supersedes or [],
             "order_index": self.order_index,
-            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+            "updated_at": iso(self.updated_at),
         }

src/scribe/models/forge_connection.py

@@ -2,7 +2,7 @@ from sqlalchemy import ForeignKey, Integer, Text, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import TimestampMixin
+from scribe.models.base import TimestampMixin, iso
 
 
 class ForgeConnection(Base, TimestampMixin):
@@ -40,6 +40,6 @@ class ForgeConnection(Base, TimestampMixin):
             "kind": self.kind,
             "base_url": self.base_url,
             "host": self.host,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat(),
+            "updated_at": iso(self.updated_at),
         }

src/scribe/models/group.py

@@ -4,7 +4,7 @@ from sqlalchemy import ForeignKey, Integer, Text, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from scribe.models import Base
-from scribe.models.base import CreatedAtMixin, TimestampMixin
+from scribe.models.base import CreatedAtMixin, TimestampMixin, iso
 
 
 class Group(Base, TimestampMixin):
@@ -27,8 +27,8 @@ class Group(Base, TimestampMixin):
             "name": self.name,
             "description": self.description,
             "created_by": self.created_by,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat(),
+            "updated_at": iso(self.updated_at),
         }
 
 
@@ -53,5 +53,5 @@ class GroupMembership(Base, CreatedAtMixin):
             "group_id": self.group_id,
             "user_id": self.user_id,
             "role": self.role,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
         }

src/scribe/models/invitation.py

@@ -4,9 +4,10 @@ from sqlalchemy import Boolean, DateTime, ForeignKey, Index, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
+from scribe.models.base import CreatedAtMixin
 
 
-class InvitationToken(Base):
+class InvitationToken(Base, CreatedAtMixin):
     __tablename__ = "invitation_tokens"
 
     id: Mapped[int] = mapped_column(primary_key=True)
@@ -15,9 +16,6 @@ class InvitationToken(Base):
     invited_by: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
     expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
     used: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
-    created_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
-    )
 
     __table_args__ = (
         Index("ix_invitation_tokens_token_hash", "token_hash"),

src/scribe/models/milestone.py

@@ -2,7 +2,7 @@ from sqlalchemy import ForeignKey, Integer, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import TimestampMixin, SoftDeleteMixin
+from scribe.models.base import SoftDeleteMixin, TimestampMixin, iso
 
 
 class Milestone(Base, TimestampMixin, SoftDeleteMixin):
@@ -30,6 +30,6 @@ class Milestone(Base, TimestampMixin, SoftDeleteMixin):
             "body": self.body,
             "status": self.status,
             "order_index": self.order_index,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat(),
+            "updated_at": iso(self.updated_at),
         }

src/scribe/models/note.py

@@ -6,7 +6,7 @@ from sqlalchemy.dialects.postgresql import ARRAY, JSONB
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import TimestampMixin, SoftDeleteMixin
+from scribe.models.base import SoftDeleteMixin, TimestampMixin, iso
 
 
 class TaskStatus(str, enum.Enum):
@@ -105,18 +105,14 @@ class Note(Base, TimestampMixin, SoftDeleteMixin):
             "milestone_id": self.milestone_id,
             "status": self.status,
             "priority": self.priority,
-            "due_date": self.due_date.isoformat() if self.due_date else None,
+            "due_date": iso(self.due_date),
-            "started_at": self.started_at.isoformat() if self.started_at else None,
+            "started_at": iso(self.started_at),
-            "completed_at": self.completed_at.isoformat() if self.completed_at else None,
+            "completed_at": iso(self.completed_at),
             "recurrence_rule": self.recurrence_rule,
-            "recurrence_next_spawn_at": (
+            "recurrence_next_spawn_at": iso(self.recurrence_next_spawn_at),
-                self.recurrence_next_spawn_at.isoformat()
-                if self.recurrence_next_spawn_at
-                else None
-            ),
             "is_task": self.is_task,
             "note_type": self.note_type or "note",
             "task_kind": self.task_kind,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat(),
+            "updated_at": iso(self.updated_at),
         }

src/scribe/models/note_draft.py

@@ -2,7 +2,7 @@ from sqlalchemy import ForeignKey, Integer, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import TimestampMixin
+from scribe.models.base import TimestampMixin, iso
 
 
 class NoteDraft(Base, TimestampMixin):
@@ -25,6 +25,6 @@ class NoteDraft(Base, TimestampMixin):
             "original_body": self.original_body,
             "instruction": self.instruction,
             "scope": self.scope,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat(),
+            "updated_at": iso(self.updated_at),
         }

src/scribe/models/note_supersession.py

@@ -2,7 +2,7 @@ from sqlalchemy import ForeignKey, Index, Integer, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import CreatedAtMixin
+from scribe.models.base import CreatedAtMixin, iso
 
 
 class NoteSupersession(Base, CreatedAtMixin):
@@ -66,5 +66,5 @@ class NoteSupersession(Base, CreatedAtMixin):
             "id": self.id,
             "superseder_id": self.superseder_id,
             "superseded_id": self.superseded_id,
-            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "created_at": iso(self.created_at),
         }

src/scribe/models/note_usage.py

@@ -1,15 +1,14 @@
-from datetime import datetime, timezone
+from sqlalchemy import Index, Integer, Text
-
-from sqlalchemy import DateTime, Index, Integer, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
+from scribe.models.base import CreatedAtMixin, iso
 
 SURFACED = "surfaced"
 PULLED = "pulled"
 
 
-class NoteUsageEvent(Base):
+class NoteUsageEvent(Base, CreatedAtMixin):
     """One row per time a note was SURFACED to the agent, or PULLED in full.
 
     Answers the question RetrievalLog cannot: not "what did the ranker return
@@ -44,9 +43,6 @@ class NoteUsageEvent(Base):
     __tablename__ = "note_usage_events"
 
     id: Mapped[int] = mapped_column(primary_key=True)
-    created_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
-    )
     user_id: Mapped[int | None] = mapped_column(Integer, nullable=True)
     note_id: Mapped[int] = mapped_column(Integer, nullable=False)
     # 'surfaced' | 'pulled'
@@ -81,7 +77,7 @@ class NoteUsageEvent(Base):
     def to_dict(self) -> dict:
         return {
             "id": self.id,
-            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "created_at": iso(self.created_at),
             "user_id": self.user_id,
             "note_id": self.note_id,
             "event": self.event,

src/scribe/models/note_version.py

@@ -2,7 +2,7 @@ from sqlalchemy import ARRAY, ForeignKey, Integer, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import CreatedAtMixin
+from scribe.models.base import CreatedAtMixin, iso
 
 
 class NoteVersion(Base, CreatedAtMixin):
@@ -26,7 +26,7 @@ class NoteVersion(Base, CreatedAtMixin):
             "tags": self.tags or [],
             "pin_kind": self.pin_kind,
             "pin_label": self.pin_label,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
         }
         if include_body:
             d["body"] = self.body

src/scribe/models/notification.py

@@ -5,7 +5,7 @@ from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import CreatedAtMixin
+from scribe.models.base import CreatedAtMixin, iso
 
 
 class Notification(Base, CreatedAtMixin):
@@ -26,6 +26,6 @@ class Notification(Base, CreatedAtMixin):
             "user_id": self.user_id,
             "type": self.type,
             "payload": self.payload,
-            "read_at": self.read_at.isoformat() if self.read_at else None,
+            "read_at": iso(self.read_at),
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
         }

src/scribe/models/password_reset.py

@@ -4,9 +4,10 @@ from sqlalchemy import Boolean, DateTime, ForeignKey, Index, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
+from scribe.models.base import CreatedAtMixin
 
 
-class PasswordResetToken(Base):
+class PasswordResetToken(Base, CreatedAtMixin):
     __tablename__ = "password_reset_tokens"
 
     id: Mapped[int] = mapped_column(primary_key=True)
@@ -14,9 +15,6 @@ class PasswordResetToken(Base):
     token_hash: Mapped[str] = mapped_column(Text, nullable=False, unique=True)
     expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
     used: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
-    created_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
-    )
 
     __table_args__ = (
         Index("ix_password_reset_tokens_token_hash", "token_hash"),

src/scribe/models/project.py

@@ -2,7 +2,7 @@ import enum
 from sqlalchemy import BigInteger, ForeignKey, Integer, Text
 from sqlalchemy.orm import Mapped, mapped_column
 from scribe.models import Base
-from scribe.models.base import TimestampMixin, SoftDeleteMixin
+from scribe.models.base import SoftDeleteMixin, TimestampMixin, iso
 
 
 class ProjectStatus(str, enum.Enum):
@@ -48,6 +48,6 @@ class Project(Base, TimestampMixin, SoftDeleteMixin):
             "color": self.color,
             "design_system_id": self.design_system_id,
             "forge_connection_id": self.forge_connection_id,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat(),
+            "updated_at": iso(self.updated_at),
         }

src/scribe/models/repo_binding.py

@@ -2,7 +2,7 @@ from sqlalchemy import ForeignKey, Integer, Text, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import TimestampMixin
+from scribe.models.base import TimestampMixin, iso
 
 
 class RepoBinding(Base, TimestampMixin):
@@ -28,6 +28,10 @@ class RepoBinding(Base, TimestampMixin):
         Integer, ForeignKey("projects.id", ondelete="CASCADE"), nullable=False
     )
     repo_key: Mapped[str] = mapped_column(Text, nullable=False)
+    # The branch the coverage refresh reads for this binding (#2873); NULL =
+    # the forge's default branch. Chosen at bind time so a dev-first project
+    # can have its ledger follow dev instead of waiting for the merge.
+    ref: Mapped[str | None] = mapped_column(Text, nullable=True)
 
     def to_dict(self) -> dict:
         return {
@@ -35,6 +39,7 @@ class RepoBinding(Base, TimestampMixin):
             "user_id": self.user_id,
             "project_id": self.project_id,
             "repo_key": self.repo_key,
-            "created_at": self.created_at.isoformat(),
+            "ref": self.ref,
-            "updated_at": self.updated_at.isoformat(),
+            "created_at": iso(self.created_at),
+            "updated_at": iso(self.updated_at),
         }

src/scribe/models/retrieval_log.py

@@ -5,6 +5,7 @@ from sqlalchemy.dialects.postgresql import JSONB
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
+from scribe.models.base import iso
 
 
 class RetrievalLog(Base):
@@ -23,6 +24,9 @@ class RetrievalLog(Base):
     __tablename__ = "retrieval_logs"
 
     id: Mapped[int] = mapped_column(primary_key=True)
+    # Declared here rather than via CreatedAtMixin on purpose: the composite
+    # index below orders on `created_at.desc()`, which needs the column object
+    # in this class body — a mixin's column is not in scope there.
     created_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
     )
@@ -54,7 +58,7 @@ class RetrievalLog(Base):
     def to_dict(self) -> dict:
         return {
             "id": self.id,
-            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "created_at": iso(self.created_at),
             "user_id": self.user_id,
             "source": self.source,
             "query": self.query,

src/scribe/models/rulebook.py

@@ -4,10 +4,10 @@ from sqlalchemy import BigInteger, Boolean, Column, DateTime, ForeignKey, Index,
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import SoftDeleteMixin
+from scribe.models.base import SoftDeleteMixin, TimestampMixin, iso
 
 
-class Rulebook(Base, SoftDeleteMixin):
+class Rulebook(Base, TimestampMixin, SoftDeleteMixin):
     __tablename__ = "rulebooks"
 
     id: Mapped[int] = mapped_column(BigInteger, primary_key=True)
@@ -19,14 +19,6 @@ class Rulebook(Base, SoftDeleteMixin):
     always_on: Mapped[bool] = mapped_column(
         Boolean, default=False, nullable=False, server_default="false"
     )
-    created_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
-    )
-    updated_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True),
-        default=lambda: datetime.now(timezone.utc),
-        onupdate=lambda: datetime.now(timezone.utc),
-    )
 
     def to_dict(self) -> dict:
         return {
@@ -35,12 +27,12 @@ class Rulebook(Base, SoftDeleteMixin):
             "title": self.title,
             "description": self.description or "",
             "always_on": self.always_on,
-            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+            "updated_at": iso(self.updated_at),
         }
 
 
-class RulebookTopic(Base, SoftDeleteMixin):
+class RulebookTopic(Base, TimestampMixin, SoftDeleteMixin):
     __tablename__ = "rulebook_topics"
     # Partial unique: a title is unique among LIVE topics in a rulebook, so a
     # trashed topic doesn't block recreating/restoring the same title.
@@ -58,14 +50,6 @@ class RulebookTopic(Base, SoftDeleteMixin):
     title: Mapped[str] = mapped_column(Text)
     description: Mapped[str | None] = mapped_column(Text, nullable=True)
     order_index: Mapped[int] = mapped_column(Integer, default=0)
-    created_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
-    )
-    updated_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True),
-        default=lambda: datetime.now(timezone.utc),
-        onupdate=lambda: datetime.now(timezone.utc),
-    )
 
     def to_dict(self) -> dict:
         return {
@@ -74,12 +58,12 @@ class RulebookTopic(Base, SoftDeleteMixin):
             "title": self.title,
             "description": self.description or "",
             "order_index": self.order_index,
-            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+            "updated_at": iso(self.updated_at),
         }
 
 
-class Rule(Base, SoftDeleteMixin):
+class Rule(Base, TimestampMixin, SoftDeleteMixin):
     __tablename__ = "rules"
     # Partial unique: title unique among LIVE rules in a topic (soft-deleted
     # rules don't block recreating/restoring the same title).
@@ -109,14 +93,6 @@ class Rule(Base, SoftDeleteMixin):
     why: Mapped[str | None] = mapped_column(Text, nullable=True)
     how_to_apply: Mapped[str | None] = mapped_column(Text, nullable=True)
     order_index: Mapped[int] = mapped_column(Integer, default=0)
-    created_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
-    )
-    updated_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True),
-        default=lambda: datetime.now(timezone.utc),
-        onupdate=lambda: datetime.now(timezone.utc),
-    )
 
     def to_dict(self) -> dict:
         return {
@@ -128,8 +104,8 @@ class Rule(Base, SoftDeleteMixin):
             "why": self.why or "",
             "how_to_apply": self.how_to_apply or "",
             "order_index": self.order_index,
-            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+            "updated_at": iso(self.updated_at),
         }
 
 

src/scribe/models/share.py

@@ -2,7 +2,7 @@ from sqlalchemy import CheckConstraint, ForeignKey, Integer, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import TimestampMixin
+from scribe.models.base import TimestampMixin, iso
 
 
 class ProjectShare(Base, TimestampMixin):
@@ -37,8 +37,8 @@ class ProjectShare(Base, TimestampMixin):
             "shared_with_group_id": self.shared_with_group_id,
             "permission": self.permission,
             "invited_by": self.invited_by,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat(),
+            "updated_at": iso(self.updated_at),
         }
 
 
@@ -74,6 +74,6 @@ class NoteShare(Base, TimestampMixin):
             "shared_with_group_id": self.shared_with_group_id,
             "permission": self.permission,
             "invited_by": self.invited_by,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat(),
+            "updated_at": iso(self.updated_at),
         }

src/scribe/models/system.py

@@ -2,7 +2,7 @@ from sqlalchemy import ForeignKey, Index, Integer, Text, UniqueConstraint
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import CreatedAtMixin, TimestampMixin, SoftDeleteMixin
+from scribe.models.base import CreatedAtMixin, SoftDeleteMixin, TimestampMixin, iso
 
 
 class System(Base, TimestampMixin, SoftDeleteMixin):
@@ -44,8 +44,8 @@ class System(Base, TimestampMixin, SoftDeleteMixin):
             "color": self.color,
             "status": self.status,
             "order_index": self.order_index,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat(),
+            "updated_at": iso(self.updated_at),
         }
 
 

src/scribe/models/task_log.py

@@ -2,7 +2,7 @@ from sqlalchemy import ForeignKey, Integer, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import TimestampMixin
+from scribe.models.base import TimestampMixin, iso
 
 
 class TaskLog(Base, TimestampMixin):
@@ -21,6 +21,6 @@ class TaskLog(Base, TimestampMixin):
             "user_id": self.user_id,
             "content": self.content,
             "duration_minutes": self.duration_minutes,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
-            "updated_at": self.updated_at.isoformat(),
+            "updated_at": iso(self.updated_at),
         }

src/scribe/models/user.py

@@ -2,7 +2,7 @@ from sqlalchemy import Index, Integer, Text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from scribe.models import Base
-from scribe.models.base import CreatedAtMixin
+from scribe.models.base import CreatedAtMixin, iso
 
 
 class User(Base, CreatedAtMixin):
@@ -26,6 +26,6 @@ class User(Base, CreatedAtMixin):
             "username": self.username,
             "email": self.email,
             "role": self.role,
-            "created_at": self.created_at.isoformat(),
+            "created_at": iso(self.created_at),
             "has_password": self.password_hash is not None,
         }

src/scribe/routes/admin.py

@@ -22,6 +22,7 @@ from scribe.services.email import SMTP_SETTING_KEYS, get_base_url, get_smtp_conf
 from scribe.services.logging import get_logs, get_log_stats, log_audit
 from scribe.services.notifications import send_invitation_email
 from scribe.services.settings import (
+    SECRET_MASK,
     get_admin_setting,
     set_admin_setting,
     set_setting,
@@ -116,7 +117,7 @@ async def get_smtp():
     config = await get_smtp_config()
     # Mask password
     if config.get("smtp_password"):
-        config["smtp_password"] = "********"
+        config["smtp_password"] = SECRET_MASK
     return jsonify(config)
 
 
@@ -130,7 +131,7 @@ async def update_smtp():
     for key in SMTP_SETTING_KEYS:
         if key in data:
             # Skip password if it's the mask placeholder
-            if key == "smtp_password" and data[key] == "********":
+            if key == "smtp_password" and data[key] == SECRET_MASK:
                 continue
             settings_to_save[key] = str(data[key])
 
@@ -157,9 +158,6 @@ async def test_smtp():
         return jsonify({"error": str(e)}), 500
 
 
-_TOKEN_MASK = "********"
-
-
 # The forge CONFIG moved to per-user keyring rows (#2778, Settings → Git
 # forges); what stays admin is the webhook secret, because the push endpoint
 # is one URL per instance and authenticates deliveries, not users.
@@ -178,7 +176,7 @@ async def get_forge_webhook_settings():
     return jsonify({
         # Secrets never leave the server — the smtp_password convention:
         # masked when set, empty when not.
-        "webhook_secret": _TOKEN_MASK if webhook_secret else "",
+        "webhook_secret": SECRET_MASK if webhook_secret else "",
     })
 
 
@@ -192,7 +190,7 @@ async def update_forge_webhook_settings():
     webhook_secret = data.get("webhook_secret")
     # The mask coming back means "unchanged" — the form round-trips what GET
     # showed it, and storing the mask would silently break the integration.
-    if webhook_secret is not None and webhook_secret != _TOKEN_MASK:
+    if webhook_secret is not None and webhook_secret != SECRET_MASK:
         await set_admin_setting(FORGE_WEBHOOK_SECRET_KEY, str(webhook_secret))
     # The secret is deliberately absent from the audit detail.
     await log_audit(

src/scribe/routes/design_systems.py

@@ -15,9 +15,10 @@ one and returns None for the other:
     those two IS the intent: distinguishing them would confirm the existence of
     records the caller may not see.
 """
-from quart import Blueprint, g, jsonify, request
+from quart import Blueprint, jsonify, request
 
-from scribe.auth import login_required
+from scribe.auth import get_current_user_id, login_required
+from scribe.routes.utils import not_found
 from scribe.services import design_systems as ds_svc
 from scribe.services.design_starter_roles import (
     DEFAULT_TOKEN_PREFIX,
@@ -28,12 +29,6 @@ from scribe.services.design_systems import DesignSystemCycle
 design_systems_bp = Blueprint("design_systems", __name__, url_prefix="/api")
 
 
-def _uid() -> int:
-    return g.user.id
-
-
-def _not_found(what: str = "design system"):
-    return jsonify({"error": f"{what} not found"}), 404
 
 
 # ── Design systems ──────────────────────────────────────────────────────
@@ -43,7 +38,7 @@ def _not_found(what: str = "design system"):
 async def list_design_systems():
     """The caller's design systems. An empty list is the ordinary state for an
     install that has never made one, not an error."""
-    rows = await ds_svc.list_design_systems(_uid())
+    rows = await ds_svc.list_design_systems(get_current_user_id())
     return jsonify({"design_systems": [s.to_dict() for s in rows]})
 
 
@@ -55,7 +50,7 @@ async def create_design_system():
     if not title:
         return jsonify({"error": "title is required"}), 400
     system = await ds_svc.create_design_system(
-        user_id=_uid(),
+        user_id=get_current_user_id(),
         title=title,
         description=data.get("description") or None,
         guidance=data.get("guidance") or None,
@@ -84,9 +79,9 @@ async def list_starter_role_groups():
 @design_systems_bp.get("/design-systems/<int:design_system_id>")
 @login_required
 async def get_design_system(design_system_id: int):
-    system = await ds_svc.get_design_system(_uid(), design_system_id)
+    system = await ds_svc.get_design_system(get_current_user_id(), design_system_id)
     if system is None:
-        return _not_found()
+        return not_found("Design system")
     return jsonify(system.to_dict())
 
 
@@ -102,19 +97,19 @@ async def update_design_system(design_system_id: int):
     if "parent_id" in data:
         fields["parent_id"] = data["parent_id"]
     try:
-        system = await ds_svc.update_design_system(_uid(), design_system_id, **fields)
+        system = await ds_svc.update_design_system(get_current_user_id(), design_system_id, **fields)
     except DesignSystemCycle as exc:
         return jsonify({"error": str(exc)}), 400
     if system is None:
-        return _not_found()
+        return not_found("Design system")
     return jsonify(system.to_dict())
 
 
 @design_systems_bp.delete("/design-systems/<int:design_system_id>")
 @login_required
 async def delete_design_system(design_system_id: int):
-    if not await ds_svc.delete_design_system(_uid(), design_system_id):
+    if not await ds_svc.delete_design_system(get_current_user_id(), design_system_id):
-        return _not_found()
+        return not_found("Design system")
     return "", 204
 
 
@@ -127,9 +122,9 @@ async def resolve_design_system(design_system_id: int):
     this returns what it ends up being. Both are real questions and answering
     only one would make the other a client-side computation.
     """
-    resolved = await ds_svc.resolve_design_system(_uid(), design_system_id)
+    resolved = await ds_svc.resolve_design_system(get_current_user_id(), design_system_id)
     if resolved is None:
-        return _not_found()
+        return not_found("Design system")
     return jsonify({
         "design_system_id": design_system_id,
         "tokens": [t.to_dict() for t in resolved],
@@ -149,9 +144,9 @@ async def get_design_system_stylesheet(design_system_id: int):
     `:root`, so the generator takes it as a parameter.
     """
     root = (request.args.get("root") or ":root").strip() or ":root"
-    result = await ds_svc.stylesheet_for_system(_uid(), design_system_id, root)
+    result = await ds_svc.stylesheet_for_system(get_current_user_id(), design_system_id, root)
     if result is None:
-        return _not_found()
+        return not_found("Design system")
     if request.args.get("format") == "css":
         return result["css"], 200, {"Content-Type": "text/css; charset=utf-8"}
     return jsonify(result)
@@ -168,10 +163,10 @@ async def check_snippets_against_system(design_system_id: int):
     """
     project_id = request.args.get("project_id", type=int) or 0
     result = await ds_svc.check_snippets_against_system(
-        _uid(), design_system_id, project_id
+        get_current_user_id(), design_system_id, project_id
     )
     if result is None:
-        return _not_found()
+        return not_found("Design system")
     return jsonify(result)
 
 
@@ -181,9 +176,9 @@ async def check_snippets_against_system(design_system_id: int):
 @login_required
 async def list_design_tokens(design_system_id: int):
     """This system's OWN tokens — its override set, not its effective set."""
-    if await ds_svc.get_design_system(_uid(), design_system_id) is None:
+    if await ds_svc.get_design_system(get_current_user_id(), design_system_id) is None:
-        return _not_found()
+        return not_found("Design system")
-    rows = await ds_svc.list_tokens(_uid(), design_system_id)
+    rows = await ds_svc.list_tokens(get_current_user_id(), design_system_id)
     return jsonify({"tokens": [t.to_dict() for t in rows]})
 
 
@@ -195,7 +190,7 @@ async def create_design_token(design_system_id: int):
     if not name:
         return jsonify({"error": "name is required"}), 400
     token = await ds_svc.create_token(
-        user_id=_uid(),
+        user_id=get_current_user_id(),
         design_system_id=design_system_id,
         name=name,
         value_by_mode=data.get("value_by_mode"),
@@ -206,7 +201,7 @@ async def create_design_token(design_system_id: int):
         order_index=data.get("order_index") or 0,
     )
     if token is None:
-        return _not_found()
+        return not_found("Design system")
     return jsonify(token.to_dict()), 201
 
 
@@ -221,17 +216,17 @@ async def update_design_token(token_id: int):
             "supersedes", "order_index",
         )
     }
-    token = await ds_svc.update_token(_uid(), token_id, **fields)
+    token = await ds_svc.update_token(get_current_user_id(), token_id, **fields)
     if token is None:
-        return _not_found("design token")
+        return not_found("Design token")
     return jsonify(token.to_dict())
 
 
 @design_systems_bp.delete("/design-tokens/<int:token_id>")
 @login_required
 async def delete_design_token(token_id: int):
-    if not await ds_svc.delete_token(_uid(), token_id):
+    if not await ds_svc.delete_token(get_current_user_id(), token_id):
-        return _not_found("design token")
+        return not_found("Design token")
     return "", 204
 
 
@@ -247,9 +242,9 @@ async def set_project_design_system(project_id: int):
     """
     data = await request.get_json() or {}
     ok = await ds_svc.set_project_design_system(
-        _uid(), project_id, data.get("design_system_id")
+        get_current_user_id(), project_id, data.get("design_system_id")
     )
     if not ok:
-        return _not_found("project or design system")
+        return not_found("Project or design system")
     return jsonify({"project_id": project_id,
                     "design_system_id": data.get("design_system_id")})

src/scribe/routes/notes.py

@@ -26,22 +26,6 @@ from scribe.services import dedup as dedup_svc
 from scribe.services import supersession as supersession_svc
 from scribe.services.note_usage import record_pulled
 
-
-async def _attach_supersession(uid: int, note_id: int, data: dict) -> None:
-    """Both directions of the supersession relation on a note payload.
-
-    Mirrors the MCP helper of the same name — the two surfaces must agree about
-    what a note's payload says, or the web UI and the agent would disagree about
-    whether a record is current.
-
-    Omitted when empty: a field that always says nothing trains readers to skip
-    fields, which is what `consolidated_at` cost (#2483).
-    """
-    rel = await supersession_svc.get_relations(uid, note_id)
-    if rel["supersedes"]:
-        data["supersedes"] = rel["supersedes"]
-    if rel["superseded_by"]:
-        data["superseded_by"] = rel["superseded_by"]
 from scribe.services.note_versions import list_versions, get_version
 
 logger = logging.getLogger(__name__)
@@ -142,7 +126,7 @@ async def create_note_route():
             # may not write the target. The note itself was created.
             return jsonify({"error": str(exc), "note": note.to_dict()}), 403
     out = note.to_dict()
-    await _attach_supersession(uid, note.id, out)
+    await supersession_svc.attach_relations(uid, note.id, out)
     return jsonify(out), 201
 
 
@@ -241,13 +225,17 @@ async def get_note_route(note_id: int):
     # injected line useful?" is answered by agent pulls alone, and a human
     # clicking a link would inflate exactly the number #1038 and #2085 gate on.
     record_pulled(user_id=uid, note_id=note_id, source="rest_note")
-    await _attach_supersession(uid, note_id, data)
+    await supersession_svc.attach_relations(uid, note_id, data)
     return jsonify(data)
 
 
-@notes_bp.route("/<int:note_id>", methods=["PUT"])
+@notes_bp.route("/<int:note_id>", methods=["PUT", "PATCH"])
 @login_required
 async def update_note_route(note_id: int):
+    """Partial update — only the keys present in the payload change. PUT and
+    PATCH are the same handler on purpose: the form sends the field set it
+    edited, and the two verbs used to be two near-identical copies of this
+    function that drifted (one carried the supersedes contract, one did not)."""
     uid = get_current_user_id()
     # Share-aware: resolve through the ACL and write as the OWNER, so a shared
     # editor's save isn't rejected by the owner-scoped update service.
@@ -290,44 +278,10 @@ async def update_note_route(note_id: int):
         except PermissionError as exc:
             return jsonify({"error": str(exc)}), 403
     out = note.to_dict()
-    await _attach_supersession(uid, note_id, out)
+    await supersession_svc.attach_relations(uid, note_id, out)
     return jsonify(out)
 
 
-@notes_bp.route("/<int:note_id>", methods=["PATCH"])
-@login_required
-async def patch_note_route(note_id: int):
-    uid = get_current_user_id()
-    result = await get_note_for_user(uid, note_id)
-    if result is None:
-        return not_found("Note")
-    note_obj, _ = result
-    if not await can_write_note(uid, note_id):
-        return jsonify({"error": "Permission denied"}), 403
-    owner_uid = note_obj.user_id
-    data = await request.get_json()
-    fields = {}
-    for key in ("title", "body", "description", "parent_id", "project_id", "milestone_id", "status", "priority", "note_type"):
-        if key in data:
-            fields[key] = data[key]
-    if "due_date" in data:
-        if data["due_date"]:
-            result = parse_iso_date(data["due_date"], "due_date")
-            if isinstance(result, tuple):
-                return result
-            fields["due_date"] = result
-        else:
-            fields["due_date"] = None
-    if "tags" in data:
-        fields["tags"] = data["tags"]
-    try:
-        note = await update_note(owner_uid, note_id, **fields)
-    except ValueError as e:
-        return jsonify({"error": str(e)}), 400
-    if note is None:
-        return not_found("Note")
-    return jsonify(note.to_dict())
-
 
 @notes_bp.route("/<int:note_id>", methods=["DELETE"])
 @login_required

src/scribe/routes/plugin.py

@@ -24,6 +24,35 @@ plugin_bp = Blueprint("plugin", __name__, url_prefix="/api/plugin")
 _MARKETPLACE_KEY = "plugin_marketplace_url"
 
 
+def _int_list(raw: str | None) -> list[int]:
+    """A comma-separated id list from the query string; non-ints dropped."""
+    return [int(p) for p in (raw or "").split(",") if p.strip().isdigit()]
+
+
+async def _project_scope() -> tuple[int, str, str]:
+    """(project_id, repo, unbound_repo) from the request's `project_id` /
+    `repo` query args — the one resolution every plugin endpoint shares.
+
+    An explicit project_id wins; otherwise the repo remote is resolved
+    through the caller's bindings, and a remote nobody bound comes back as
+    `unbound_repo` (normalised) so /context can say "bind this repo".
+    """
+    try:
+        project_id = int(request.args.get("project_id", 0) or 0)
+    except (TypeError, ValueError):
+        project_id = 0
+    repo = (request.args.get("repo") or "").strip()
+    unbound_repo = ""
+    if repo and not project_id:
+        resolved = await repo_bindings_svc.resolve_project(g.user.id, repo)
+        if resolved:
+            project_id = resolved
+        else:
+            unbound_repo = repo_bindings_svc.normalize_repo_key(repo)
+    return project_id, repo, unbound_repo
+
+
+
 @plugin_bp.get("/context")
 @login_required
 async def session_context():
@@ -37,20 +66,7 @@ async def session_context():
         project_id (optional int) — explicit override, mainly for manual/ad-hoc
             curl testing; takes precedence over `repo` when set.
     """
-    try:
+    project_id, _repo, unbound_repo = await _project_scope()
-        project_id = int(request.args.get("project_id", 0) or 0)
-    except (TypeError, ValueError):
-        project_id = 0
-
-    unbound_repo = ""
-    repo = (request.args.get("repo") or "").strip()
-    if repo and not project_id:
-        resolved = await repo_bindings_svc.resolve_project(g.user.id, repo)
-        if resolved:
-            project_id = resolved
-        else:
-            unbound_repo = repo_bindings_svc.normalize_repo_key(repo)
-
     result = await plugin_ctx_svc.build_session_context(
         g.user.id, project_id, unbound_repo=unbound_repo
     )
@@ -77,22 +93,8 @@ async def autoinject_retrieve():
                              session; skipped so each note injects at most once.
     """
     q = (request.args.get("q") or "").strip()
-    try:
+    project_id, _repo, _unbound = await _project_scope()
-        project_id = int(request.args.get("project_id", 0) or 0)
+    exclude_ids = _int_list(request.args.get("exclude_ids"))
-    except (TypeError, ValueError):
-        project_id = 0
-
-    repo = (request.args.get("repo") or "").strip()
-    if repo and not project_id:
-        resolved = await repo_bindings_svc.resolve_project(g.user.id, repo)
-        if resolved:
-            project_id = resolved
-
-    exclude_ids = [
-        int(p) for p in (request.args.get("exclude_ids") or "").split(",")
-        if p.strip().isdigit()
-    ]
-
     result = await plugin_ctx_svc.build_autoinject_hint(
         g.user.id, q, project_id=project_id, exclude_ids=exclude_ids
     )
@@ -127,36 +129,55 @@ async def write_path_prior_art():
                              surfaced. A separate channel on purpose: a reuse
                              hint shown early must not suppress the record-sync
                              nudge when the recorded file is edited later.
+        shapes (opt)       — comma-separated `kind:name` definitions the hook
+                             found in (or enclosing) the payload, kind being
+                             css|sym. The shape ledger's write-path feed
+                             (#2791): when the session recently PULLED a
+                             snippet this payload references or resembles,
+                             these land as instance rows (classified_by=hook).
+                             Honoured only for a caller allowed to write — a
+                             read-scoped key still gets the hint, and never
+                             changes accounting on a GET.
     """
     path = (request.args.get("path") or "").strip()
     code = request.args.get("code") or ""
-    try:
+    project_id, repo, _unbound = await _project_scope()
-        project_id = int(request.args.get("project_id", 0) or 0)
+    exclude_ids = _int_list(request.args.get("exclude_ids"))
-    except (TypeError, ValueError):
+    exclude_sync_ids = _int_list(request.args.get("exclude_sync_ids"))
-        project_id = 0
+    shapes = _parse_shapes(request.args.get("shapes") or "")
-
+    api_key = getattr(g, "api_key", None)
-    repo = (request.args.get("repo") or "").strip()
+    may_stamp = api_key is None or getattr(api_key, "scope", "") == "write"
-    if repo and not project_id:
-        resolved = await repo_bindings_svc.resolve_project(g.user.id, repo)
-        if resolved:
-            project_id = resolved
-
-    exclude_ids = [
-        int(p) for p in (request.args.get("exclude_ids") or "").split(",")
-        if p.strip().isdigit()
-    ]
-    exclude_sync_ids = [
-        int(p) for p in (request.args.get("exclude_sync_ids") or "").split(",")
-        if p.strip().isdigit()
-    ]
 
     result = await plugin_ctx_svc.build_write_path_hint(
         g.user.id, path, code=code, project_id=project_id,
         exclude_ids=exclude_ids, exclude_sync_ids=exclude_sync_ids,
+        stamp_shapes=shapes if may_stamp else None,
+        repo_key=repo_bindings_svc.normalize_repo_key(repo) if repo else "",
     )
     return jsonify(result)
 
 
+# The hook names at most a dozen definitions per write; anything past that is
+# a generated file, not a shape being instantiated.
+_SHAPES_CAP = 12
+
+
+def _parse_shapes(raw: str) -> list[tuple[str, str]]:
+    """`css:btn-primary,sym:onTrash` → [("css", "btn-primary"), ("sym", "onTrash")].
+    Unknown kinds and empty names are dropped, duplicates collapse, and the
+    list is capped — the hook's own cap, re-applied so the contract holds
+    for any caller."""
+    out: list[tuple[str, str]] = []
+    for part in raw.split(","):
+        kind, _sep, name = part.strip().partition(":")
+        kind, name = kind.strip(), name.strip()
+        if kind in ("css", "sym") and name and (kind, name) not in out:
+            out.append((kind, name))
+        if len(out) >= _SHAPES_CAP:
+            break
+    return out
+
+
 @plugin_bp.get("/processes")
 @login_required
 async def process_manifest():

src/scribe/routes/rulebooks.py

@@ -1,29 +1,26 @@
 """Rulebook / topic REST endpoints.
 
-Wraps services/rulebooks.py. Standard Scribe auth: g.user.id is the
+Wraps services/rulebooks.py. Standard Scribe auth: get_current_user_id() is the
 authenticated owner; the service enforces ownership scoping.
 """
 from __future__ import annotations
 
-from quart import Blueprint, g, jsonify, request
+from quart import Blueprint, jsonify, request
 
-from scribe.auth import login_required
+from scribe.auth import get_current_user_id, login_required
 import scribe.services.rulebooks as rulebooks_svc
 from scribe.services.trash import delete as trash_delete
 
 rulebooks_bp = Blueprint("rulebooks", __name__, url_prefix="/api")
 
 
-def _uid() -> int:
-    return g.user.id
-
 
 # ── Rulebooks ───────────────────────────────────────────────────────────
 
 @rulebooks_bp.get("/rulebooks")
 @login_required
 async def list_rulebooks():
-    rows = await rulebooks_svc.list_rulebooks(_uid())
+    rows = await rulebooks_svc.list_rulebooks(get_current_user_id())
     return jsonify({"rulebooks": [rb.to_dict() for rb in rows]})
 
 
@@ -35,7 +32,7 @@ async def create_rulebook():
     if not title:
         return jsonify({"error": "title is required"}), 400
     rb = await rulebooks_svc.create_rulebook(
-        user_id=_uid(),
+        user_id=get_current_user_id(),
         title=title,
         description=data.get("description", ""),
     )
@@ -45,7 +42,7 @@ async def create_rulebook():
 @rulebooks_bp.get("/rulebooks/<int:rulebook_id>")
 @login_required
 async def get_rulebook(rulebook_id: int):
-    rb = await rulebooks_svc.get_rulebook(rulebook_id, _uid())
+    rb = await rulebooks_svc.get_rulebook(rulebook_id, get_current_user_id())
     if rb is None:
         return jsonify({"error": "rulebook not found"}), 404
     return jsonify(rb.to_dict())
@@ -56,7 +53,7 @@ async def get_rulebook(rulebook_id: int):
 async def update_rulebook(rulebook_id: int):
     data = await request.get_json() or {}
     fields = {k: v for k, v in data.items() if k in ("title", "description", "always_on")}
-    rb = await rulebooks_svc.update_rulebook(rulebook_id, _uid(), **fields)
+    rb = await rulebooks_svc.update_rulebook(rulebook_id, get_current_user_id(), **fields)
     if rb is None:
         return jsonify({"error": "rulebook not found"}), 404
     return jsonify(rb.to_dict())
@@ -65,7 +62,7 @@ async def update_rulebook(rulebook_id: int):
 @rulebooks_bp.delete("/rulebooks/<int:rulebook_id>")
 @login_required
 async def delete_rulebook(rulebook_id: int):
-    await trash_delete(_uid(), "rulebook", rulebook_id)
+    await trash_delete(get_current_user_id(), "rulebook", rulebook_id)
     return "", 204
 
 
@@ -75,7 +72,7 @@ async def delete_rulebook(rulebook_id: int):
 @login_required
 async def list_topics(rulebook_id: int):
     try:
-        rows = await rulebooks_svc.list_topics(rulebook_id, _uid())
+        rows = await rulebooks_svc.list_topics(rulebook_id, get_current_user_id())
     except ValueError as exc:
         return jsonify({"error": str(exc)}), 404
     return jsonify({"topics": [t.to_dict() for t in rows]})
@@ -91,7 +88,7 @@ async def create_topic(rulebook_id: int):
     try:
         topic = await rulebooks_svc.create_topic(
             rulebook_id=rulebook_id,
-            user_id=_uid(),
+            user_id=get_current_user_id(),
             title=title,
             description=data.get("description", ""),
             order_index=data.get("order_index", 0),
@@ -109,7 +106,7 @@ async def update_topic(topic_id: int):
         k: v for k, v in data.items()
         if k in ("title", "description", "order_index")
     }
-    topic = await rulebooks_svc.update_topic(topic_id, _uid(), **fields)
+    topic = await rulebooks_svc.update_topic(topic_id, get_current_user_id(), **fields)
     if topic is None:
         return jsonify({"error": "topic not found"}), 404
     return jsonify(topic.to_dict())
@@ -118,7 +115,7 @@ async def update_topic(topic_id: int):
 @rulebooks_bp.delete("/rulebook-topics/<int:topic_id>")
 @login_required
 async def delete_topic(topic_id: int):
-    if await trash_delete(_uid(), "topic", topic_id) is None:
+    if await trash_delete(get_current_user_id(), "topic", topic_id) is None:
         return jsonify({"error": "topic not found"}), 404
     return "", 204
 
@@ -140,7 +137,7 @@ async def list_rules():
         return jsonify({"error": "rulebook_id, topic_id, project_id must be integers"}), 400
 
     rows = await rulebooks_svc.list_rules(
-        user_id=_uid(),
+        user_id=get_current_user_id(),
         rulebook_id=rulebook_id,
         topic_id=topic_id,
         project_id=project_id,
@@ -159,7 +156,7 @@ async def create_rule(topic_id: int):
     try:
         rule = await rulebooks_svc.create_rule(
             topic_id=topic_id,
-            user_id=_uid(),
+            user_id=get_current_user_id(),
             title=title,
             statement=statement,
             why=data.get("why", ""),
@@ -174,7 +171,7 @@ async def create_rule(topic_id: int):
 @rulebooks_bp.get("/rules/<int:rule_id>")
 @login_required
 async def get_rule(rule_id: int):
-    rule = await rulebooks_svc.get_rule(rule_id, _uid())
+    rule = await rulebooks_svc.get_rule(rule_id, get_current_user_id())
     if rule is None:
         return jsonify({"error": "rule not found"}), 404
     return jsonify(rule.to_dict())
@@ -188,7 +185,7 @@ async def update_rule(rule_id: int):
         k: v for k, v in data.items()
         if k in ("title", "statement", "why", "how_to_apply", "order_index")
     }
-    rule = await rulebooks_svc.update_rule(rule_id, _uid(), **fields)
+    rule = await rulebooks_svc.update_rule(rule_id, get_current_user_id(), **fields)
     if rule is None:
         return jsonify({"error": "rule not found"}), 404
     return jsonify(rule.to_dict())
@@ -197,7 +194,7 @@ async def update_rule(rule_id: int):
 @rulebooks_bp.delete("/rules/<int:rule_id>")
 @login_required
 async def delete_rule(rule_id: int):
-    if await trash_delete(_uid(), "rule", rule_id) is None:
+    if await trash_delete(get_current_user_id(), "rule", rule_id) is None:
         return jsonify({"error": "rule not found"}), 404
     return "", 204
 
@@ -213,7 +210,7 @@ async def subscribe_project(project_id: int):
         return jsonify({"error": "rulebook_id is required"}), 400
     try:
         await rulebooks_svc.subscribe_project(
-            project_id=project_id, rulebook_id=int(rulebook_id), user_id=_uid(),
+            project_id=project_id, rulebook_id=int(rulebook_id), user_id=get_current_user_id(),
         )
     except ValueError as exc:
         return jsonify({"error": str(exc)}), 404
@@ -227,7 +224,7 @@ async def subscribe_project(project_id: int):
 async def unsubscribe_project(project_id: int, rulebook_id: int):
     try:
         await rulebooks_svc.unsubscribe_project(
-            project_id=project_id, rulebook_id=rulebook_id, user_id=_uid(),
+            project_id=project_id, rulebook_id=rulebook_id, user_id=get_current_user_id(),
         )
     except ValueError as exc:
         return jsonify({"error": str(exc)}), 404
@@ -238,7 +235,7 @@ async def unsubscribe_project(project_id: int, rulebook_id: int):
 @login_required
 async def get_project_rules(project_id: int):
     result = await rulebooks_svc.get_applicable_rules(
-        project_id=project_id, user_id=_uid(),
+        project_id=project_id, user_id=get_current_user_id(),
     )
     return jsonify(result)
 
@@ -248,7 +245,7 @@ async def get_project_rules(project_id: int):
 async def suppress_project_rule(project_id: int, rule_id: int):
     try:
         await rulebooks_svc.suppress_rule_for_project(
-            project_id=project_id, rule_id=rule_id, user_id=_uid(),
+            project_id=project_id, rule_id=rule_id, user_id=get_current_user_id(),
         )
     except ValueError as exc:
         return jsonify({"error": str(exc)}), 404
@@ -260,7 +257,7 @@ async def suppress_project_rule(project_id: int, rule_id: int):
 async def unsuppress_project_rule(project_id: int, rule_id: int):
     try:
         await rulebooks_svc.unsuppress_rule_for_project(
-            project_id=project_id, rule_id=rule_id, user_id=_uid(),
+            project_id=project_id, rule_id=rule_id, user_id=get_current_user_id(),
         )
     except ValueError as exc:
         return jsonify({"error": str(exc)}), 404
@@ -272,7 +269,7 @@ async def unsuppress_project_rule(project_id: int, rule_id: int):
 async def suppress_project_topic(project_id: int, topic_id: int):
     try:
         await rulebooks_svc.suppress_topic_for_project(
-            project_id=project_id, topic_id=topic_id, user_id=_uid(),
+            project_id=project_id, topic_id=topic_id, user_id=get_current_user_id(),
         )
     except ValueError as exc:
         return jsonify({"error": str(exc)}), 404
@@ -284,7 +281,7 @@ async def suppress_project_topic(project_id: int, topic_id: int):
 async def unsuppress_project_topic(project_id: int, topic_id: int):
     try:
         await rulebooks_svc.unsuppress_topic_for_project(
-            project_id=project_id, topic_id=topic_id, user_id=_uid(),
+            project_id=project_id, topic_id=topic_id, user_id=get_current_user_id(),
         )
     except ValueError as exc:
         return jsonify({"error": str(exc)}), 404
@@ -303,7 +300,7 @@ async def create_project_rule(project_id: int):
     try:
         rule = await rulebooks_svc.create_project_rule(
             project_id=project_id,
-            user_id=_uid(),
+            user_id=get_current_user_id(),
             title=title,
             statement=statement,
             why=data.get("why", ""),

src/scribe/routes/settings.py

@@ -9,7 +9,9 @@ from quart import Blueprint, jsonify, request
 
 from scribe.auth import login_required, get_current_user_id
 from scribe.config import Config
-from scribe.services.settings import delete_setting, get_all_settings, get_setting, set_settings_batch
+from scribe.services.settings import (
+    SECRET_MASK, delete_setting, get_all_settings, get_setting, set_settings_batch,
+)
 
 logger = logging.getLogger(__name__)
 
@@ -22,12 +24,11 @@ settings_bp = Blueprint("settings", __name__, url_prefix="/api/settings")
 # rows live on the admin's own user_id, so the plain GET returned them raw.
 # (forge_token left with 0078: forge credentials are keyring rows now, #2778.)
 _SECRET_KEYS = frozenset({"smtp_password", "forge_webhook_secret"})
-_SECRET_MASK = "********"
 
 
 def _masked(settings: dict) -> dict:
     return {
-        k: (_SECRET_MASK if k in _SECRET_KEYS and v else v)
+        k: (SECRET_MASK if k in _SECRET_KEYS and v else v)
         for k, v in settings.items()
     }
 
@@ -53,7 +54,7 @@ async def update_settings_route():
         str_v = str(v)
         # A masked secret round-tripping through a client is "unchanged", not
         # a request to store the mask over the real credential.
-        if k in _SECRET_KEYS and str_v == _SECRET_MASK:
+        if k in _SECRET_KEYS and str_v == SECRET_MASK:
             continue
         if not str_v:
             await delete_setting(uid, k)
@@ -127,7 +128,7 @@ async def update_forge_connection_route(connection_id: int):
     token = str(data.get("token", ""))
     # The mask coming back means "unchanged" — the form round-trips what the
     # list showed, and storing the mask would silently break the connection.
-    if token == _SECRET_MASK:
+    if token == SECRET_MASK:
         token = ""
     try:
         row = await update_connection(

src/scribe/routes/trash.py

@@ -1,33 +1,30 @@
 """Trash REST API — list / restore / purge soft-deleted content by batch."""
 from __future__ import annotations
 
-from quart import Blueprint, g, jsonify
+from quart import Blueprint, jsonify
 
-from scribe.auth import login_required
+from scribe.auth import get_current_user_id, login_required
 import scribe.services.trash as trash_svc
 
 trash_bp = Blueprint("trash", __name__, url_prefix="/api/trash")
 
 
-def _uid() -> int:
-    return g.user.id
-
 
 @trash_bp.get("")
 @login_required
 async def list_trash():
-    return jsonify({"batches": await trash_svc.list_trash(_uid())})
+    return jsonify({"batches": await trash_svc.list_trash(get_current_user_id())})
 
 
 @trash_bp.post("/<batch_id>/restore")
 @login_required
 async def restore_batch(batch_id: str):
-    n = await trash_svc.restore(_uid(), batch_id)
+    n = await trash_svc.restore(get_current_user_id(), batch_id)
     return jsonify({"restored": n})
 
 
 @trash_bp.delete("/<batch_id>")
 @login_required
 async def purge_batch(batch_id: str):
-    n = await trash_svc.purge(_uid(), batch_id)
+    n = await trash_svc.purge(get_current_user_id(), batch_id)
     return jsonify({"purged": n})

src/scribe/services/api_keys.py

@@ -13,8 +13,11 @@ def generate_key() -> str:
     return "fmcp_" + secrets.token_urlsafe(32)
 
 
-def _hash_key(key: str) -> str:
+def hash_token(raw: str) -> str:
-    return hashlib.sha256(key.encode()).hexdigest()
+    """The ONE fingerprint for every bearer secret stored by hash — API keys,
+    password-reset tokens, invitation tokens. Stored rows hold this, never
+    the raw value; a lookup hashes the presented token and compares."""
+    return hashlib.sha256(raw.encode()).hexdigest()
 
 
 def _key_prefix(key: str) -> str:
@@ -32,7 +35,7 @@ async def create_api_key(
     key = ApiKey(
         user_id=user_id,
         name=name,
-        key_hash=_hash_key(full_key),
+        key_hash=hash_token(full_key),
         key_prefix=_key_prefix(full_key),
         scope=scope,
     )
@@ -70,7 +73,7 @@ async def revoke_api_key(user_id: int, key_id: int) -> bool:
 
 async def lookup_key(raw_key: str) -> ApiKey | None:
     """Look up a non-revoked ApiKey by raw token value. Updates last_used_at."""
-    key_hash = _hash_key(raw_key)
+    key_hash = hash_token(raw_key)
     async with async_session() as session:
         result = await session.execute(
             select(ApiKey).where(

src/scribe/services/auth.py

@@ -1,4 +1,3 @@
-import hashlib
 import logging
 import secrets
 from datetime import datetime, timedelta, timezone
@@ -12,6 +11,8 @@ from scribe.models.invitation import InvitationToken
 from scribe.models.password_reset import PasswordResetToken
 from scribe.models.setting import Setting
 from scribe.models.user import User
+from scribe.services.api_keys import hash_token
+from scribe.services.settings import get_admin_setting
 
 logger = logging.getLogger(__name__)
 
@@ -142,16 +143,7 @@ async def is_registration_open() -> bool:
     user_count = await get_user_count()
     if user_count == 0:
         return True
-
+    return await get_admin_setting("registration_open", "false") == "true"
-    async with async_session() as session:
-        # Find the admin user's registration_open setting
-        result = await session.execute(
-            select(Setting)
-            .join(User, Setting.user_id == User.id)
-            .where(User.role == "admin", Setting.key == "registration_open")
-        )
-        setting = result.scalar_one_or_none()
-        return setting.value == "true" if setting else False
 
 
 async def list_users() -> list[User]:
@@ -211,7 +203,7 @@ async def get_user_by_email(email: str) -> User | None:
 async def create_password_reset_token(user_id: int) -> str:
     """Generate a password reset token. Returns the raw token (for the email link)."""
     raw_token = secrets.token_urlsafe(32)
-    token_hash = hashlib.sha256(raw_token.encode()).hexdigest()
+    token_hash = hash_token(raw_token)
     expires_at = datetime.now(timezone.utc) + timedelta(hours=1)
 
     async with async_session() as session:
@@ -239,7 +231,7 @@ async def create_password_reset_token(user_id: int) -> str:
 
 async def reset_password_with_token(raw_token: str, new_password: str) -> int | None:
     """Validate a reset token and update the user's password. Returns user_id on success."""
-    token_hash = hashlib.sha256(raw_token.encode()).hexdigest()
+    token_hash = hash_token(raw_token)
 
     async with async_session() as session:
         result = await session.execute(
@@ -270,7 +262,7 @@ async def reset_password_with_token(raw_token: str, new_password: str) -> int |
 async def create_invitation(email: str, invited_by: int) -> str:
     """Generate an invitation token. Returns the raw token (for the email link)."""
     raw_token = secrets.token_urlsafe(32)
-    token_hash = hashlib.sha256(raw_token.encode()).hexdigest()
+    token_hash = hash_token(raw_token)
     expires_at = datetime.now(timezone.utc) + timedelta(days=7)
 
     async with async_session() as session:
@@ -299,7 +291,7 @@ async def create_invitation(email: str, invited_by: int) -> str:
 
 async def validate_invitation_token(raw_token: str) -> InvitationToken | None:
     """Look up by hash, check not used/expired. Returns the token record with email."""
-    token_hash = hashlib.sha256(raw_token.encode()).hexdigest()
+    token_hash = hash_token(raw_token)
 
     async with async_session() as session:
         result = await session.execute(
@@ -319,7 +311,7 @@ async def validate_invitation_token(raw_token: str) -> InvitationToken | None:
 
 async def register_with_invitation(raw_token: str, username: str, password: str) -> User | None:
     """Validate token, create user with the invitation's email, mark token used."""
-    token_hash = hashlib.sha256(raw_token.encode()).hexdigest()
+    token_hash = hash_token(raw_token)
 
     async with async_session() as session:
         result = await session.execute(
@@ -398,20 +390,16 @@ async def purge_expired_auth_tokens(grace_days: int = 7) -> int:
     return removed
 
 
-async def _auth_token_retention_loop() -> None:
+async def _auth_token_retention_tick() -> None:
-    import asyncio
+    removed = await purge_expired_auth_tokens()
-    while True:
+    if removed:
-        await asyncio.sleep(86400)  # daily
+        logger.info("Auth token retention: deleted %d expired token(s)", removed)
-        try:
-            removed = await purge_expired_auth_tokens()
-            if removed:
-                logger.info("Auth token retention: deleted %d expired token(s)", removed)
-        except Exception:
-            logger.exception("Error in auth token retention cleanup")
 
 
 def start_auth_token_retention_loop() -> None:
     global _auth_retention_task
-    import asyncio
     if _auth_retention_task is None or _auth_retention_task.done():
-        _auth_retention_task = asyncio.create_task(_auth_token_retention_loop())
+        from scribe.services.background import start_periodic
+        _auth_retention_task = start_periodic(
+            86400, _auth_token_retention_tick, label="auth_token_retention",  # daily
+        )

src/scribe/services/background.py

@@ -45,6 +45,26 @@ def spawn(coro: Coroutine, *, site: str) -> None:
     task.add_done_callback(_done)
 
 
+def start_periodic(interval_s: float, work, *, label: str) -> asyncio.Task:
+    """A forever loop that sleeps ``interval_s`` then awaits ``work()``, logging
+    (never raising) when a tick fails — the one shape the hourly/daily
+    retention sweeps share (log retention, notification sweep, auth-token
+    purge). Sleeps FIRST so startup isn't a sweep; holds a strong reference
+    like spawn() so the loop cannot be garbage-collected mid-flight."""
+    async def _loop() -> None:
+        while True:
+            await asyncio.sleep(interval_s)
+            try:
+                await work()
+            except Exception:
+                logger.exception("periodic task %s failed", label)
+
+    task = asyncio.get_running_loop().create_task(_loop(), name=f"periodic-{label}")
+    _pending.add(task)
+    task.add_done_callback(_pending.discard)
+    return task
+
+
 async def drain() -> None:
     """Await everything in flight — for tests that need the writes landed."""
     while _pending:

src/scribe/services/backup.py

@@ -11,7 +11,7 @@ from scribe.models.note_supersession import NoteSupersession
 from scribe.models.note_version import NoteVersion
 from scribe.models.design_system import DesignSystem, DesignToken
 from scribe.models.note_usage import NoteUsageEvent
-from scribe.models.code_shape import CodeShape
+from scribe.models.code_shape import CodeShape, CodeShapeEvent, CodeShapeUse
 from scribe.models.project import Project
 from scribe.models.repo_binding import RepoBinding
 from scribe.models.rulebook import (
@@ -40,8 +40,13 @@ logger = logging.getLogger(__name__)
 # v7 (2026-08) added code_shapes — the shape ledger (#2787). Classifications
 # are judgment data worth carrying; a restore keeps a judgment only when its
 # snippet target survives the id re-mapping, else the row rejoins the todo.
+# v8 (2026-08) added code_shape_events — the ledger's history (#2793): what
+# was used where, when, and why is not recomputable, so it travels.
+# v9 (2026-08) added code_shape_uses — the ledger's consumption edges (#2870):
+# judgment-grade edges (agent/audit/import) are operator records; mechanical
+# ones (reference/hook) travel too, cheaply, and the next refresh refreshes them.
 # Bump when the serialized schema changes.
-BACKUP_VERSION = 7
+BACKUP_VERSION = 9
 
 # Every table this backup carries, by its REAL name. Paired with _NOT_INCLUDED
 # below, these two lists must together account for the entire schema — which is
@@ -59,8 +64,8 @@ _BACKED_UP = [
     # v5 (2026-08): the five-year gap this list was written to stop.
     "systems", "record_systems", "design_systems", "design_tokens",
     "note_usage_events", "repo_bindings", "note_supersessions",
-    # v7 (2026-08): the shape ledger (#2787).
+    # v7 (2026-08): the shape ledger (#2787); v8: its history (#2793).
-    "code_shapes",
+    "code_shapes", "code_shape_events", "code_shape_uses",
 ]
 
 # Tables intentionally NOT in the backup, surfaced in the payload so the gap is
@@ -176,6 +181,14 @@ def _code_shape_rows(rows) -> list[dict]:
     return [r.to_dict() for r in rows]
 
 
+def _code_shape_event_rows(rows) -> list[dict]:
+    return [r.to_dict() for r in rows]
+
+
+def _code_shape_use_rows(rows) -> list[dict]:
+    return [r.to_dict() for r in rows]
+
+
 def _repo_binding_rows(rows) -> list[dict]:
     return [
         {"user_id": r.user_id, "project_id": r.project_id, "repo_key": r.repo_key}
@@ -183,6 +196,142 @@ def _repo_binding_rows(rows) -> list[dict]:
     ]
 
 
+# Row builders for the sections both exporters carry. Pure, like the join-table
+# helpers above; the full and per-user exports used to restate every one of
+# these comprehensions side by side, and a column added to one and not the
+# other is a backup that silently drops it (#2293's shape, one layer down).
+
+def _user_rows(rows) -> list[dict]:
+    return [
+        {
+            "id": u.id, "username": u.username, "email": u.email,
+            "password_hash": u.password_hash, "oauth_sub": u.oauth_sub,
+            "role": u.role, "session_version": u.session_version,
+            "created_at": u.created_at.isoformat(),
+        }
+        for u in rows
+    ]
+
+
+def _project_rows(rows) -> list[dict]:
+    return [
+        {
+            "id": p.id, "user_id": p.user_id, "title": p.title,
+            "description": p.description, "goal": p.goal, "status": p.status,
+            "color": p.color,
+            "created_at": p.created_at.isoformat(),
+            "updated_at": p.updated_at.isoformat(),
+        }
+        for p in rows
+    ]
+
+
+def _milestone_rows(rows) -> list[dict]:
+    return [
+        {
+            "id": m.id, "user_id": m.user_id, "project_id": m.project_id,
+            "title": m.title, "description": m.description, "status": m.status,
+            "order_index": m.order_index,
+            "created_at": m.created_at.isoformat(),
+            "updated_at": m.updated_at.isoformat(),
+        }
+        for m in rows
+    ]
+
+
+def _note_rows(rows) -> list[dict]:
+    return [
+        {
+            "id": n.id, "user_id": n.user_id, "title": n.title, "body": n.body,
+            "tags": n.tags or [], "parent_id": n.parent_id,
+            "project_id": n.project_id, "milestone_id": n.milestone_id,
+            "status": n.status, "priority": n.priority,
+            "due_date": n.due_date.isoformat() if n.due_date else None,
+            "created_at": n.created_at.isoformat(),
+            "updated_at": n.updated_at.isoformat(),
+        }
+        for n in rows
+    ]
+
+
+def _task_log_rows(rows) -> list[dict]:
+    return [
+        {
+            "id": tl.id, "user_id": tl.user_id, "task_id": tl.task_id,
+            "content": tl.content, "duration_minutes": tl.duration_minutes,
+            "created_at": tl.created_at.isoformat(),
+            "updated_at": tl.updated_at.isoformat(),
+        }
+        for tl in rows
+    ]
+
+
+def _note_draft_rows(rows) -> list[dict]:
+    return [
+        {
+            "id": nd.id, "user_id": nd.user_id, "note_id": nd.note_id,
+            "proposed_body": nd.proposed_body, "original_body": nd.original_body,
+            "instruction": nd.instruction, "scope": nd.scope,
+            "created_at": nd.created_at.isoformat(),
+            "updated_at": nd.updated_at.isoformat(),
+        }
+        for nd in rows
+    ]
+
+
+def _note_version_rows(rows) -> list[dict]:
+    return [
+        {
+            "id": nv.id, "user_id": nv.user_id, "note_id": nv.note_id,
+            "title": nv.title, "body": nv.body, "tags": nv.tags or [],
+            "pin_kind": nv.pin_kind, "pin_label": nv.pin_label,
+            "created_at": nv.created_at.isoformat(),
+        }
+        for nv in rows
+    ]
+
+
+def _setting_rows(rows) -> list[dict]:
+    return [{"user_id": s.user_id, "key": s.key, "value": s.value} for s in rows]
+
+
+def _rulebook_rows(rows) -> list[dict]:
+    return [
+        {
+            "id": rb.id, "owner_user_id": rb.owner_user_id, "title": rb.title,
+            "description": rb.description, "always_on": rb.always_on,
+            "created_at": rb.created_at.isoformat(),
+            "updated_at": rb.updated_at.isoformat(),
+        }
+        for rb in rows
+    ]
+
+
+def _topic_rows(rows) -> list[dict]:
+    return [
+        {
+            "id": t.id, "rulebook_id": t.rulebook_id, "title": t.title,
+            "description": t.description, "order_index": t.order_index,
+            "created_at": t.created_at.isoformat(),
+            "updated_at": t.updated_at.isoformat(),
+        }
+        for t in rows
+    ]
+
+
+def _rule_rows(rows) -> list[dict]:
+    return [
+        {
+            "id": r.id, "topic_id": r.topic_id, "project_id": r.project_id,
+            "title": r.title, "statement": r.statement, "why": r.why,
+            "how_to_apply": r.how_to_apply, "order_index": r.order_index,
+            "created_at": r.created_at.isoformat(),
+            "updated_at": r.updated_at.isoformat(),
+        }
+        for r in rows
+    ]
+
+
 # ---------------------------------------------------------------------------
 # Export
 # ---------------------------------------------------------------------------
@@ -216,6 +365,12 @@ async def export_full_backup() -> dict:
         usage_events = (await session.execute(select(NoteUsageEvent))).scalars().all()
         repo_bindings = (await session.execute(select(RepoBinding))).scalars().all()
         code_shapes = (await session.execute(select(CodeShape))).scalars().all()
+        code_shape_events = (await session.execute(
+            select(CodeShapeEvent).order_by(CodeShapeEvent.at, CodeShapeEvent.id)
+        )).scalars().all()
+        code_shape_uses = (await session.execute(
+            select(CodeShapeUse).order_by(CodeShapeUse.shape_id, CodeShapeUse.snippet_id)
+        )).scalars().all()
         rulebooks = (await session.execute(select(Rulebook))).scalars().all()
         topics = (await session.execute(select(RulebookTopic))).scalars().all()
         rules = (await session.execute(select(Rule))).scalars().all()
@@ -238,148 +393,17 @@ async def export_full_backup() -> dict:
             "Store it securely and restrict access."
         ),
         "_not_included": _NOT_INCLUDED,
-        "users": [
+        "users": _user_rows(users),
-            {
+        "projects": _project_rows(projects),
-                "id": u.id,
+        "milestones": _milestone_rows(milestones),
-                "username": u.username,
+        "notes": _note_rows(notes),
-                "email": u.email,
+        "task_logs": _task_log_rows(task_logs),
-                "password_hash": u.password_hash,
+        "note_drafts": _note_draft_rows(note_drafts),
-                "oauth_sub": u.oauth_sub,
+        "note_versions": _note_version_rows(note_versions),
-                "role": u.role,
+        "settings": _setting_rows(settings),
-                "session_version": u.session_version,
+        "rulebooks": _rulebook_rows(rulebooks),
-                "created_at": u.created_at.isoformat(),
+        "rulebook_topics": _topic_rows(topics),
-            }
+        "rules": _rule_rows(rules),
-            for u in users
-        ],
-        "projects": [
-            {
-                "id": p.id,
-                "user_id": p.user_id,
-                "title": p.title,
-                "description": p.description,
-                "goal": p.goal,
-                "status": p.status,
-                "color": p.color,
-                "created_at": p.created_at.isoformat(),
-                "updated_at": p.updated_at.isoformat(),
-            }
-            for p in projects
-        ],
-        "milestones": [
-            {
-                "id": m.id,
-                "user_id": m.user_id,
-                "project_id": m.project_id,
-                "title": m.title,
-                "description": m.description,
-                "status": m.status,
-                "order_index": m.order_index,
-                "created_at": m.created_at.isoformat(),
-                "updated_at": m.updated_at.isoformat(),
-            }
-            for m in milestones
-        ],
-        "notes": [
-            {
-                "id": n.id,
-                "user_id": n.user_id,
-                "title": n.title,
-                "body": n.body,
-                "tags": n.tags or [],
-                "parent_id": n.parent_id,
-                "project_id": n.project_id,
-                "milestone_id": n.milestone_id,
-                "status": n.status,
-                "priority": n.priority,
-                "due_date": n.due_date.isoformat() if n.due_date else None,
-                "created_at": n.created_at.isoformat(),
-                "updated_at": n.updated_at.isoformat(),
-            }
-            for n in notes
-        ],
-        "task_logs": [
-            {
-                "id": tl.id,
-                "user_id": tl.user_id,
-                "task_id": tl.task_id,
-                "content": tl.content,
-                "duration_minutes": tl.duration_minutes,
-                "created_at": tl.created_at.isoformat(),
-                "updated_at": tl.updated_at.isoformat(),
-            }
-            for tl in task_logs
-        ],
-        "note_drafts": [
-            {
-                "id": nd.id,
-                "user_id": nd.user_id,
-                "note_id": nd.note_id,
-                "proposed_body": nd.proposed_body,
-                "original_body": nd.original_body,
-                "instruction": nd.instruction,
-                "scope": nd.scope,
-                "created_at": nd.created_at.isoformat(),
-                "updated_at": nd.updated_at.isoformat(),
-            }
-            for nd in note_drafts
-        ],
-        "note_versions": [
-            {
-                "id": nv.id,
-                "user_id": nv.user_id,
-                "note_id": nv.note_id,
-                "title": nv.title,
-                "body": nv.body,
-                "tags": nv.tags or [],
-                "pin_kind": nv.pin_kind,
-                "pin_label": nv.pin_label,
-                "created_at": nv.created_at.isoformat(),
-            }
-            for nv in note_versions
-        ],
-        "settings": [
-            {"user_id": s.user_id, "key": s.key, "value": s.value}
-            for s in settings
-        ],
-        "rulebooks": [
-            {
-                "id": rb.id,
-                "owner_user_id": rb.owner_user_id,
-                "title": rb.title,
-                "description": rb.description,
-                "always_on": rb.always_on,
-                "created_at": rb.created_at.isoformat(),
-                "updated_at": rb.updated_at.isoformat(),
-            }
-            for rb in rulebooks
-        ],
-        "rulebook_topics": [
-            {
-                "id": t.id,
-                "rulebook_id": t.rulebook_id,
-                "title": t.title,
-                "description": t.description,
-                "order_index": t.order_index,
-                "created_at": t.created_at.isoformat(),
-                "updated_at": t.updated_at.isoformat(),
-            }
-            for t in topics
-        ],
-        "rules": [
-            {
-                "id": r.id,
-                "topic_id": r.topic_id,
-                "project_id": r.project_id,
-                "title": r.title,
-                "statement": r.statement,
-                "why": r.why,
-                "how_to_apply": r.how_to_apply,
-                "order_index": r.order_index,
-                "created_at": r.created_at.isoformat(),
-                "updated_at": r.updated_at.isoformat(),
-            }
-            for r in rules
-        ],
         "rulebook_subscriptions": _subscription_rows(subscriptions),
         "rule_suppressions": _rule_suppression_rows(rule_suppressions),
         "topic_suppressions": _topic_suppression_rows(topic_suppressions),
@@ -391,6 +415,8 @@ async def export_full_backup() -> dict:
         "repo_bindings": _repo_binding_rows(repo_bindings),
         "note_supersessions": _note_supersession_rows(supersessions),
         "code_shapes": _code_shape_rows(code_shapes),
+        "code_shape_events": _code_shape_event_rows(code_shape_events),
+        "code_shape_uses": _code_shape_use_rows(code_shape_uses),
     }
 
 
@@ -463,6 +489,15 @@ async def export_user_backup(user_id: int) -> dict:
         code_shapes = (await session.execute(
             select(CodeShape).where(CodeShape.project_id.in_(project_ids))
         )).scalars().all() if project_ids else []
+        code_shape_events = (await session.execute(
+            select(CodeShapeEvent).where(CodeShapeEvent.project_id.in_(project_ids))
+            .order_by(CodeShapeEvent.at, CodeShapeEvent.id)
+        )).scalars().all() if project_ids else []
+        code_shape_uses = (await session.execute(
+            select(CodeShapeUse).join(CodeShape, CodeShape.id == CodeShapeUse.shape_id)
+            .where(CodeShape.project_id.in_(project_ids))
+            .order_by(CodeShapeUse.shape_id, CodeShapeUse.snippet_id)
+        )).scalars().all() if project_ids else []
         rulebooks = (await session.execute(
             select(Rulebook).where(Rulebook.owner_user_id == user_id)
         )).scalars().all()
@@ -512,135 +547,16 @@ async def export_user_backup(user_id: int) -> dict:
             "role": user.role,
             "created_at": user.created_at.isoformat(),
         } if user else None,
-        "projects": [
+        "projects": _project_rows(projects),
-            {
+        "milestones": _milestone_rows(milestones),
-                "id": p.id,
+        "notes": _note_rows(notes),
-                "user_id": p.user_id,
+        "task_logs": _task_log_rows(task_logs),
-                "title": p.title,
+        "note_drafts": _note_draft_rows(note_drafts),
-                "description": p.description,
+        "note_versions": _note_version_rows(note_versions),
-                "goal": p.goal,
+        "settings": _setting_rows(settings),
-                "status": p.status,
+        "rulebooks": _rulebook_rows(rulebooks),
-                "color": p.color,
+        "rulebook_topics": _topic_rows(topics),
-                "created_at": p.created_at.isoformat(),
+        "rules": _rule_rows(rules),
-                "updated_at": p.updated_at.isoformat(),
-            }
-            for p in projects
-        ],
-        "milestones": [
-            {
-                "id": m.id,
-                "user_id": m.user_id,
-                "project_id": m.project_id,
-                "title": m.title,
-                "description": m.description,
-                "status": m.status,
-                "order_index": m.order_index,
-                "created_at": m.created_at.isoformat(),
-                "updated_at": m.updated_at.isoformat(),
-            }
-            for m in milestones
-        ],
-        "notes": [
-            {
-                "id": n.id,
-                "user_id": n.user_id,
-                "title": n.title,
-                "body": n.body,
-                "tags": n.tags or [],
-                "parent_id": n.parent_id,
-                "project_id": n.project_id,
-                "milestone_id": n.milestone_id,
-                "status": n.status,
-                "priority": n.priority,
-                "due_date": n.due_date.isoformat() if n.due_date else None,
-                "created_at": n.created_at.isoformat(),
-                "updated_at": n.updated_at.isoformat(),
-            }
-            for n in notes
-        ],
-        "task_logs": [
-            {
-                "id": tl.id,
-                "user_id": tl.user_id,
-                "task_id": tl.task_id,
-                "content": tl.content,
-                "duration_minutes": tl.duration_minutes,
-                "created_at": tl.created_at.isoformat(),
-                "updated_at": tl.updated_at.isoformat(),
-            }
-            for tl in task_logs
-        ],
-        "note_drafts": [
-            {
-                "id": nd.id,
-                "user_id": nd.user_id,
-                "note_id": nd.note_id,
-                "proposed_body": nd.proposed_body,
-                "original_body": nd.original_body,
-                "instruction": nd.instruction,
-                "scope": nd.scope,
-                "created_at": nd.created_at.isoformat(),
-                "updated_at": nd.updated_at.isoformat(),
-            }
-            for nd in note_drafts
-        ],
-        "note_versions": [
-            {
-                "id": nv.id,
-                "user_id": nv.user_id,
-                "note_id": nv.note_id,
-                "title": nv.title,
-                "body": nv.body,
-                "tags": nv.tags or [],
-                "pin_kind": nv.pin_kind,
-                "pin_label": nv.pin_label,
-                "created_at": nv.created_at.isoformat(),
-            }
-            for nv in note_versions
-        ],
-        "settings": [
-            {"user_id": s.user_id, "key": s.key, "value": s.value}
-            for s in settings
-        ],
-        "rulebooks": [
-            {
-                "id": rb.id,
-                "owner_user_id": rb.owner_user_id,
-                "title": rb.title,
-                "description": rb.description,
-                "always_on": rb.always_on,
-                "created_at": rb.created_at.isoformat(),
-                "updated_at": rb.updated_at.isoformat(),
-            }
-            for rb in rulebooks
-        ],
-        "rulebook_topics": [
-            {
-                "id": t.id,
-                "rulebook_id": t.rulebook_id,
-                "title": t.title,
-                "description": t.description,
-                "order_index": t.order_index,
-                "created_at": t.created_at.isoformat(),
-                "updated_at": t.updated_at.isoformat(),
-            }
-            for t in topics
-        ],
-        "rules": [
-            {
-                "id": r.id,
-                "topic_id": r.topic_id,
-                "project_id": r.project_id,
-                "title": r.title,
-                "statement": r.statement,
-                "why": r.why,
-                "how_to_apply": r.how_to_apply,
-                "order_index": r.order_index,
-                "created_at": r.created_at.isoformat(),
-                "updated_at": r.updated_at.isoformat(),
-            }
-            for r in rules
-        ],
         "rulebook_subscriptions": _subscription_rows(subscriptions),
         "rule_suppressions": _rule_suppression_rows(rule_suppressions),
         "topic_suppressions": _topic_suppression_rows(topic_suppressions),
@@ -652,6 +568,8 @@ async def export_user_backup(user_id: int) -> dict:
         "repo_bindings": _repo_binding_rows(repo_bindings),
         "note_supersessions": _note_supersession_rows(supersessions),
         "code_shapes": _code_shape_rows(code_shapes),
+        "code_shape_events": _code_shape_event_rows(code_shape_events),
+        "code_shape_uses": _code_shape_use_rows(code_shape_uses),
     }
 
 
@@ -755,7 +673,8 @@ async def _restore_v2(data: dict) -> dict:
         "topic_suppressions": 0,
         "systems": 0, "record_systems": 0, "design_systems": 0,
         "design_tokens": 0, "note_usage_events": 0, "repo_bindings": 0,
-        "note_supersessions": 0, "code_shapes": 0,
+        "note_supersessions": 0, "code_shapes": 0, "code_shape_events": 0,
+        "code_shape_uses": 0,
     }
 
     async with async_session() as session:
@@ -1137,6 +1056,7 @@ async def _restore_v2(data: dict) -> dict:
         # survive the re-mapping (canonical/instance/variant with a gone
         # snippet) is downgraded to unclassified so it rejoins the todo
         # honestly instead of dangling; exempt needs no target and keeps.
+        shape_id_map: dict[int, int] = {}
         for cs_data in data.get("code_shapes", []):
             mapped_pid = project_id_map.get(cs_data.get("project_id", 0))
             if mapped_pid is None:
@@ -1149,7 +1069,7 @@ async def _restore_v2(data: dict) -> dict:
                 status = "unclassified"
                 classified_by = None
                 classified_at = None
-            session.add(CodeShape(
+            shape = CodeShape(
                 project_id=mapped_pid,
                 repo_key=cs_data.get("repo_key", ""),
                 path=cs_data.get("path", ""),
@@ -1163,11 +1083,60 @@ async def _restore_v2(data: dict) -> dict:
                 first_seen_commit=cs_data.get("first_seen_commit", ""),
                 last_seen_commit=cs_data.get("last_seen_commit", ""),
                 vanished_at=_dt(cs_data["vanished_at"]) if cs_data.get("vanished_at") else None,
+                # Fingerprints restore; proposals (#2792) deliberately do not —
+                # they are mechanical, and the next refresh recomputes them
+                # against the restored snippet ids.
+                signature=cs_data.get("signature", ""),
+                body_sha=cs_data.get("body_sha", ""),
+                classified_sha=cs_data.get("classified_sha", ""),
                 created_at=_dt(cs_data.get("created_at")),
                 updated_at=_dt(cs_data.get("updated_at")),
-            ))
+            )
+            session.add(shape)
+            await session.flush()
+            if cs_data.get("id"):
+                shape_id_map[int(cs_data["id"])] = shape.id
             stats["code_shapes"] += 1
 
+        # v8: the ledger's history rides its shapes. snippet_id is kept as
+        # the history's own claim (FK-free by design) but re-mapped when the
+        # snippet survived, so a restored timeline points at restored records.
+        for ev in data.get("code_shape_events", []):
+            new_shape_id = shape_id_map.get(ev.get("shape_id") or 0)
+            mapped_pid = project_id_map.get(ev.get("project_id", 0))
+            if new_shape_id is None or mapped_pid is None:
+                continue
+            old_sid = ev.get("snippet_id")
+            session.add(CodeShapeEvent(
+                shape_id=new_shape_id,
+                project_id=mapped_pid,
+                path=ev.get("path", ""),
+                symbol=ev.get("symbol", ""),
+                kind=ev.get("kind", "sym"),
+                event=ev.get("event", "classified"),
+                status=ev.get("status"),
+                snippet_id=note_id_map.get(old_sid, old_sid) if old_sid else None,
+                classified_by=ev.get("classified_by"),
+                reason=ev.get("reason"),
+                commit=ev.get("commit", ""),
+                at=_dt(ev.get("at")),
+            ))
+            stats["code_shape_events"] += 1
+
+        # v9: consumption edges (#2870) ride their shape AND their snippet —
+        # both ends must have survived, or the edge is no longer a fact.
+        for use in data.get("code_shape_uses", []):
+            new_shape_id = shape_id_map.get(use.get("shape_id") or 0)
+            new_sid = note_id_map.get(use.get("snippet_id") or 0)
+            if new_shape_id is None or new_sid is None:
+                continue
+            session.add(CodeShapeUse(
+                shape_id=new_shape_id, snippet_id=new_sid,
+                basis=use.get("basis", "import"), evidence=use.get("evidence"),
+                created_at=_dt(use.get("created_at")),
+            ))
+            stats["code_shape_uses"] += 1
+
         await session.commit()
 
     logger.info("Restored v2/v3 backup: %s", stats)

src/scribe/services/coverage.py

@@ -25,16 +25,18 @@ only ever reads the cache.
 """
 from __future__ import annotations
 
+import hashlib
 import io
 import json
 import logging
 import posixpath
 import re
 import tarfile
-from datetime import datetime, timezone
+from typing import NamedTuple
+from datetime import datetime, timedelta, timezone
 
 from scribe.services.forge import ForgeSelector, get_forges
-from scribe.services.repo_bindings import keys_for_project
+from scribe.services.repo_bindings import bindings_for_project
 from scribe.services.settings import get_setting, set_setting
 
 logger = logging.getLogger(__name__)
@@ -91,6 +93,148 @@ _ARROW_RE = re.compile(
 )
 
 
+class Definition(NamedTuple):
+    """One extracted definition with its content fingerprint (#2792).
+
+    `signature` is the definition line itself; `body_sha` hashes the block
+    whitespace- and comment-insensitively; `body` is the block's text, held
+    only for the duration of a refresh (the proposer matches on it) and
+    never stored.
+    """
+
+    kind: str
+    name: str
+    signature: str
+    body_sha: str
+    body: str
+    line: int = -1   # 0-based line the definition starts on (#2869)
+
+
+def _definition_on(raw: str) -> tuple[str, str] | None:
+    """The (kind, name) this one line defines, or None. First match wins —
+    the same order the hook's awk program tries."""
+    m = _CSS_RE.match(raw)
+    if m:
+        return ("css", m.group(1))
+    line = _MODIFIERS_RE.sub("", raw.lstrip())
+    if m := _GO_METHOD_RE.match(line):
+        return ("sym", m.group(1))
+    if m := _KEYWORD_RE.match(line):
+        name = m.group(1)
+        if name.startswith("__") and name.endswith("__"):
+            return None
+        return ("sym", name)
+    if m := _ARROW_RE.match(line):
+        return ("sym", m.group(1))
+    return None
+
+
+# A definition's block runs from its line until the next non-blank line at
+# its own indentation or shallower that is not a closer — so a Python def ends
+# at the next top-level statement, a braces block keeps its `}`, a CSS rule
+# keeps its `}`. Capped so a generated monolith can't make one shape's
+# fingerprint cover the file.
+_BLOCK_CAP = 120
+_CLOSERS = ("}", ")", "]", "end", "};", "});", ");", "})", "]);")
+# Lines that don't change what a shape IS: comments and decorators. Dropped
+# from the fingerprint so touching a comment above the next function doesn't
+# read as this one's body changing.
+_NOISE_PREFIXES = ("#", "//", "/*", "*", "*/", "@", "<!--", "-->")
+_SIGNATURE_CAP = 300
+
+
+def _indent(line: str) -> int:
+    return len(line) - len(line.lstrip())
+
+
+def _block_sha(lines: list[str]) -> str:
+    kept = [
+        " ".join(ln.split())
+        for ln in lines
+        if ln.strip() and not ln.lstrip().startswith(_NOISE_PREFIXES)
+    ]
+    return hashlib.sha1("\n".join(kept).encode("utf-8")).hexdigest()[:16]
+
+
+def extract_definitions(text: str) -> list[Definition]:
+    """Every definition this text makes, with signature + fingerprint.
+
+    Duplicate (kind, name) within one text collapse to the first — the
+    ledger's identity is per file, so a second definition of the same name
+    (an overload, a re-declaration) is the same shape to it.
+    """
+    lines = text.splitlines()
+    starts: list[tuple[int, str, str]] = []
+    for i, raw in enumerate(lines):
+        hit = _definition_on(raw)
+        if hit:
+            starts.append((i, hit[0], hit[1]))
+    seen: set[tuple[str, str]] = set()
+    out: list[Definition] = []
+    for i, kind, name in starts:
+        if (kind, name) in seen:
+            continue
+        seen.add((kind, name))
+        base = _indent(lines[i])
+        end = min(len(lines), i + _BLOCK_CAP)
+        for j in range(i + 1, min(len(lines), i + _BLOCK_CAP)):
+            ln = lines[j]
+            if not ln.strip():
+                continue
+            if _indent(ln) <= base and ln.strip() not in _CLOSERS:
+                end = j
+                break
+        block = lines[i:end]
+        # A CSS rule's fingerprint is its DECLARATIONS, not its selector
+        # (#2872): the row's identity already carries the selector, and the
+        # question the fingerprint answers for derive grouping is "is this the
+        # same rule under another name?" — .closed-msg / .error-block /
+        # .success-msg with identical bodies are one dup group, not three
+        # lonely rows. Sym blocks keep their signature line in the hash.
+        hashed = block[1:] if kind == "css" and len(block) > 1 else block
+        out.append(Definition(
+            kind, name, lines[i].strip()[:_SIGNATURE_CAP], _block_sha(hashed),
+            "\n".join(block), i,
+        ))
+    return out
+
+
+# --- by-construction scope (#2869) -------------------------------------------
+#
+# A Vue single-file component's `<style scoped>` rules and its `<script setup>`
+# functions cannot be reached from any other file: they are one-offs by
+# construction, not by judgment. The sync stamps them `scoped` (mechanical) so
+# the human todo holds only shapes a person should look at, while the bodies
+# stay in play for the proposer, derive grouping and divergence — the five
+# auth views' identical rules were found exactly there. Unscoped `<style>` in
+# a .vue and every non-.vue file stay ordinary.
+_STYLE_OPEN_RE = re.compile(r"^\s*<style\b[^>]*\bscoped\b", re.IGNORECASE)
+_STYLE_CLOSE_RE = re.compile(r"^\s*</style\s*>", re.IGNORECASE)
+
+
+def scoped_definitions(path: str, text: str, defs: list[Definition]) -> set[tuple[str, str]]:
+    """The (kind, name) pairs among ``defs`` that are one-offs by
+    construction in this file: every sym in a .vue, and every css rule
+    that starts inside a `<style scoped>` block. Empty for other files."""
+    if not (path or "").lower().endswith(".vue"):
+        return set()
+    ranges: list[tuple[int, int]] = []
+    open_at: int | None = None
+    for i, ln in enumerate(text.splitlines()):
+        if open_at is None and _STYLE_OPEN_RE.match(ln):
+            open_at = i
+        elif open_at is not None and _STYLE_CLOSE_RE.match(ln):
+            ranges.append((open_at, i))
+            open_at = None
+    out: set[tuple[str, str]] = set()
+    for d in defs:
+        if d.kind == "sym":
+            out.add((d.kind, d.name))
+        elif any(a <= d.line <= b for a, b in ranges):
+            out.add((d.kind, d.name))
+    return out
+
+
 def extract_shapes(text: str) -> list[tuple[str, str]]:
     """Every (kind, name) this text DEFINES — kind is "css" or "sym".
 
@@ -98,29 +242,7 @@ def extract_shapes(text: str) -> list[tuple[str, str]]:
     line, dunders are skipped (every class defines __init__ — guaranteed
     noise), duplicates within one text count once.
     """
-    seen: set[tuple[str, str]] = set()
+    return [(d.kind, d.name) for d in extract_definitions(text)]
-    out: list[tuple[str, str]] = []
-    for raw in text.splitlines():
-        m = _CSS_RE.match(raw)
-        if m:
-            shape = ("css", m.group(1))
-        else:
-            line = _MODIFIERS_RE.sub("", raw.lstrip())
-            if m := _GO_METHOD_RE.match(line):
-                shape = ("sym", m.group(1))
-            elif m := _KEYWORD_RE.match(line):
-                name = m.group(1)
-                if name.startswith("__") and name.endswith("__"):
-                    continue
-                shape = ("sym", name)
-            elif m := _ARROW_RE.match(line):
-                shape = ("sym", m.group(1))
-            else:
-                continue
-        if shape not in seen:
-            seen.add(shape)
-            out.append(shape)
-    return out
 
 
 def scannable(path: str) -> bool:
@@ -131,14 +253,34 @@ def scannable(path: str) -> bool:
     return not path.lower().endswith(_SKIP_SUFFIXES)
 
 
+class ArchiveShape(NamedTuple):
+    """A definition located in a repo archive — what the sync upserts and
+    the proposer matches. The leading (path, kind, name) triple is the
+    ledger identity; the rest is the fingerprint and the transient body."""
+
+    path: str
+    kind: str
+    name: str
+    signature: str
+    body_sha: str
+    body: str
+    scoped: bool = False   # one-off by construction (#2869)
+
+
 def shapes_from_archive(blob: bytes) -> list[tuple[str, str, str]]:
-    """(path, kind, name) for every definition in a repo tarball.
+    """(path, kind, name) for every definition in a repo tarball — the
+    identity view of definitions_from_archive."""
+    return [(d.path, d.kind, d.name) for d in definitions_from_archive(blob)]
+
+
+def definitions_from_archive(blob: bytes) -> list[ArchiveShape]:
+    """Every definition in a repo tarball, with its fingerprint and body.
 
     Forge archives wrap content in a single top-level directory (repo-ref/);
     that component is stripped so paths match recorded snippet locations,
     which are repo-relative. Non-UTF-8 files are binaries and skipped.
     """
-    shapes: list[tuple[str, str, str]] = []
+    shapes: list[ArchiveShape] = []
     with tarfile.open(fileobj=io.BytesIO(blob), mode="r:gz") as tar:
         for member in tar:
             if not member.isfile() or "/" not in member.name:
@@ -153,7 +295,15 @@ def shapes_from_archive(blob: bytes) -> list[tuple[str, str, str]]:
                 text = handle.read().decode("utf-8")
             except UnicodeDecodeError:
                 continue
-            shapes.extend((path, kind, name) for kind, name in extract_shapes(text))
+            defs = extract_definitions(text)
+            scoped = scoped_definitions(path, text, defs)
+            shapes.extend(
+                ArchiveShape(
+                    path, d.kind, d.name, d.signature, d.body_sha, d.body,
+                    (d.kind, d.name) in scoped,
+                )
+                for d in defs
+            )
     return shapes
 
 
@@ -253,13 +403,20 @@ async def compute_coverage(
 
     served: list[tuple[str, str]] = []
     recorded = await _recorded_locations(user_id, project_id)
-    for key in await keys_for_project(user_id, project_id):
+    # The proposer's canon catalog, read once per refresh and shared across
+    # the project's repos (#2792).
+    canons = None
+    proposer_stats = {"examined": 0, "proposed": 0, "semantic_checked": 0}
+    for binding in await bindings_for_project(user_id, project_id):
+        key = binding.repo_key
         hit = selector.resolve(key)
         if hit is None:
             continue  # bound to a host no connection serves
         forge, api_repo = hit
-        ref = await forge.default_branch(api_repo)
+        # The binding's own ref when it names one (#2873: a dev-first project
-        shapes = shapes_from_archive(await forge.archive(api_repo, ref))
+        # has its ledger follow dev), else the forge's default branch.
+        ref = binding.ref or await forge.default_branch(api_repo)
+        definitions = definitions_from_archive(await forge.archive(api_repo, ref))
         # The head commit is provenance sugar on the ledger rows; failing to
         # learn it must not fail the sync — the ref names the point well
         # enough and the row timestamps carry the when.
@@ -268,19 +425,49 @@ async def compute_coverage(
         except ForgeError:
             marker = ref
         await shape_ledger.sync_repo_shapes(
-            project_id, key, shapes, seen_marker=marker
+            project_id, key, definitions, seen_marker=marker
         )
         served.append((key, ref))
+        # Propose while the bodies are in hand — the one moment they exist.
+        # Canonical marking below only touches rows the proposer leaves
+        # alone (a canon's own location never gets a proposal), so the order
+        # is immaterial; the proposer must not be able to fail the refresh.
+        try:
+            if canons is None:
+                canons = await shape_ledger.canon_catalog(user_id)
+            stats = await shape_ledger.propose_for_repo(
+                user_id, project_id, key, definitions, canons=canons
+            )
+            for k in proposer_stats:
+                proposer_stats[k] += stats.get(k, 0)
+        except Exception:
+            logger.warning("shape proposer failed for %s", key, exc_info=True)
     if not served:
         return None
 
     await shape_ledger.mark_canonicals(project_id, recorded)
+    try:
+        await shape_ledger.apply_derive_groups(project_id)
+    except Exception:
+        logger.warning("derive-first grouping failed", exc_info=True)
+    # The button-B pass (#2793): shapes new since the PREVIOUS computation,
+    # where a canon dominates. The previous computation's stamp is the cache;
+    # a first seed has none, so it flags nothing (everything is new then).
+    try:
+        previous = await get_setting(user_id, f"{_CACHE_KEY_PREFIX}{project_id}")
+        since = None
+        if previous:
+            stamp = (json.loads(previous) or {}).get("computed_at")
+            since = datetime.fromisoformat(stamp) if stamp else None
+        await shape_ledger.flag_divergence(project_id, since=since)
+    except Exception:
+        logger.warning("divergence pass failed", exc_info=True)
 
     # Project-wide readout, deliberately wider than this walk: a second bound
     # repo that was unreachable today still has live rows, and they count.
     rows = await shape_ledger.live_rows(project_id)
     counts = {"canonical": 0, "instance": 0, "variant": 0, "exempt": 0,
-              "unclassified": 0}
+              "scoped": 0, "unclassified": 0}
     for row in rows:
         counts[row.status] = counts.get(row.status, 0) + 1
     by_repo: dict[str, dict[str, int]] = {}
@@ -290,11 +477,24 @@ async def compute_coverage(
         agg["accounted"] += row.status != "unclassified"
 
     unclassified = counts.pop("unclassified")
+    proposals = shape_ledger.proposal_summary(rows)
+    divergence = shape_ledger.divergence_summary(rows)
     return {
         "total": len(rows),
         "accounted": len(rows) - unclassified,
         "unclassified": unclassified,
         "counts": counts,
+        # The proposer's standing (#2792): canon proposals awaiting a
+        # confirm, the largest derive-first groups, and what this refresh did.
+        "proposed": proposals["proposed"],
+        "derive_groups": proposals["derive_groups"],
+        "top_canon": proposals.get("top_canon"),
+        "proposer": proposer_stats,
+        # The divergence readout (#2793): button B where button A is canon,
+        # and judged shapes whose bodies moved since they were judged.
+        "divergent": divergence["divergent"],
+        "divergence": divergence["divergence"],
+        "recheck": divergence["recheck"],
         # Honesty flag, not decoration: every surface that shows the number
         # is expected to carry it through.
         "estimate": True,
@@ -323,6 +523,90 @@ async def refresh_coverage(
     return coverage
 
 
+# The arrival-moment self-seed (#2802). A ledger that has never been computed
+# used to wait for someone to find the UI Refresh button; entering the project
+# is the moment the number is wanted, so entering is the moment it seeds.
+_SEED_MAX_AGE = timedelta(hours=24)
+
+# Projects with a refresh already running — concurrent enters must not fetch
+# the same tarball N times. In-process on purpose: the cost being bounded is
+# per-process forge traffic, and a rare double-fetch across workers is
+# harmless (the upsert is idempotent).
+_inflight_seed: set[int] = set()
+
+
+async def refresh_if_stale(
+    user_id: int, project_id: int, cached: dict | None = None
+) -> None:
+    """Background-refresh a project's ledger when its readout is absent or
+    older than a day. Fire-and-forget material (background.spawn): every exit
+    is quiet, every failure a WARNING — a seed must never surface as an
+    enter_project error. ``user_id`` is the project OWNER (whose keyring and
+    cache this is); pass ``cached`` when the caller already read it.
+    """
+    try:
+        if cached is None:
+            cached = await cached_coverage(user_id, project_id)
+        if cached:
+            try:
+                computed = datetime.fromisoformat(cached.get("computed_at") or "")
+                if datetime.now(timezone.utc) - computed < _SEED_MAX_AGE:
+                    return
+            except ValueError:
+                pass  # an unreadable stamp reads as stale
+        if project_id in _inflight_seed:
+            return
+        selector = await get_forges(user_id, project_id)
+        if not selector.configured:
+            return  # rule #115: forge-less stays exactly as it was
+        _inflight_seed.add(project_id)
+        try:
+            await refresh_coverage(user_id, project_id, selector=selector)
+        finally:
+            _inflight_seed.discard(project_id)
+    except Exception:
+        logger.warning(
+            "background coverage seed failed for project %s", project_id,
+            exc_info=True,
+        )
+
+
+async def refresh_for_caller(caller_id: int, project_id: int) -> dict:
+    """The explicit agent-facing refresh (#2802) — synchronous, named errors.
+
+    Write-gated: recomputing spends the owner's forge API budget and rewrites
+    ledger rows' seen-markers, so a read share doesn't grant it. Resolution
+    runs on the OWNER's keyring like every other forge read. Raises
+    ValueError with a fixable message instead of silently measuring nothing —
+    the caller is an agent mid-task, and "None" would strand it exactly the
+    way the button-only path did.
+    """
+    from scribe.models import async_session
+    from scribe.models.project import Project
+    from scribe.services import access
+
+    if not await access.can_write_project(caller_id, project_id):
+        raise ValueError(f"project {project_id} not found or no write access")
+    async with async_session() as session:
+        project = await session.get(Project, project_id)
+    if project is None:
+        raise ValueError(f"project {project_id} not found")
+    owner_id = project.user_id or caller_id
+    selector = await get_forges(owner_id, project_id)
+    if not selector.configured:
+        raise ValueError(
+            "No forge connection serves this project — the owner adds one "
+            "under Settings → Integrations → Git Forges"
+        )
+    coverage = await refresh_coverage(owner_id, project_id, selector=selector)
+    if coverage is None:
+        raise ValueError(
+            "No bound repo is served by the owner's forge connections — "
+            "bind_repo the project's repo on a host a connection serves"
+        )
+    return coverage
+
+
 async def cached_coverage(user_id: int, project_id: int) -> dict | None:
     """The last computed summary, or None — never computes."""
     raw = await get_setting(user_id, f"{_CACHE_KEY_PREFIX}{project_id}", "")
@@ -341,7 +625,7 @@ def coverage_line(coverage: dict) -> str:
     counts = coverage.get("counts") or {}
     breakdown = " · ".join(
         f"{counts[k]} {k}"
-        for k in ("canonical", "instance", "variant", "exempt")
+        for k in ("canonical", "instance", "variant", "exempt", "scoped")
         if counts.get(k)
     )
     line = (
@@ -354,7 +638,27 @@ def coverage_line(coverage: dict) -> str:
     unclassified = coverage.get("unclassified", 0)
     if unclassified:
         line += f"; {unclassified} unclassified"
+        standing = []
+        if coverage.get("proposed"):
+            standing.append(f"{coverage['proposed']} proposed")
+        n_groups = len(coverage.get("derive_groups") or [])
+        if n_groups:
+            standing.append(f"{n_groups} derive group{'s' if n_groups != 1 else ''}")
+        if coverage.get("divergent"):
+            standing.append(f"{coverage['divergent']} DIVERGENT")
+        # The next action, on the line (#2874): the canon with the biggest
+        # queue to confirm, and the widest body-identical copy to consolidate.
+        top = coverage.get("top_canon") or {}
+        if top.get("snippet_id"):
+            standing.append(f"top canon #{top['snippet_id']} ×{top.get('count', 0)}")
+        first = (coverage.get("derive_groups") or [{}])[0]
+        if first.get("label") and first.get("files"):
+            standing.append(f"top copy {first['label']} ×{first['files']} files")
+        if standing:
+            line += f" ({', '.join(standing)})"
         gaps = [g["dir"] for g in coverage.get("largest_gaps") or []]
         if gaps:
             line += ", largest: " + ", ".join(gaps)
+    if coverage.get("recheck"):
+        line += f"; {coverage['recheck']} judged shape{'s' if coverage['recheck'] != 1 else ''} changed since judged — recheck"
     return line

src/scribe/services/dashboard.py

@@ -15,6 +15,7 @@ from scribe.models import async_session
 from scribe.models.note import Note
 from scribe.models.project import Project
 from scribe.models.milestone import Milestone
+from scribe.models.base import iso
 from scribe.services import milestones as milestones_svc
 
 logger = logging.getLogger(__name__)
@@ -173,7 +174,7 @@ async def _recently_completed(user_id: int) -> list[dict]:
             .order_by(Note.completed_at.desc()).limit(RECENT_DONE_LIMIT)
         )).all()
         return [{"id": n.id, "title": n.title, "project_title": ptitle,
-                 "completed_at": n.completed_at.isoformat()} for n, ptitle in rows]
+                 "completed_at": iso(n.completed_at)} for n, ptitle in rows]
 
 
 async def _week_stats(user_id: int) -> dict:

src/scribe/services/db_maintenance.py

@@ -21,6 +21,7 @@ from datetime import datetime, timezone
 from sqlalchemy import text
 
 from scribe.models import async_session, engine
+from scribe.models.base import iso
 from scribe.services.settings import get_admin_setting, set_admin_setting
 
 logger = logging.getLogger(__name__)
@@ -128,10 +129,6 @@ _HEALTH_SQL = text("""
 """)
 
 
-def _iso(value) -> str | None:
-    return value.isoformat() if value is not None else None
-
-
 async def get_table_health() -> dict:
     """Per-table health from Postgres statistics + the total database size.
 
@@ -156,8 +153,8 @@ async def get_table_health() -> dict:
             "dead_pct": float(r["dead_pct"] or 0),
             "total_bytes": int(r["total_bytes"] or 0),
             "mod_since_analyze": int(r["mod_since_analyze"] or 0),
-            "last_vacuum": _iso(r["last_vacuum"]),
+            "last_vacuum": iso(r["last_vacuum"]),
-            "last_analyze": _iso(r["last_analyze"]),
+            "last_analyze": iso(r["last_analyze"]),
         }
         for r in rows
     ]

src/scribe/services/db_maintenance_scheduler.py

@@ -1,9 +1,8 @@
 """Daily APScheduler cron for basic DB maintenance (targeted VACUUM ANALYZE).
 
-Mirrors trash_scheduler.py: a single global BackgroundScheduler job bridges
+One ScheduledJob (services/scheduler.py). Scheduled for 04:00 UTC by default
-into the asyncio loop to run the async maintenance. Scheduled for 04:00 UTC by
+— after the 03:30 trash purge — so it collects the dead tuples that night's
-default — after the 03:30 trash purge — so it collects the dead tuples that
+delete sweeps leave behind.
-night's delete sweeps leave behind.
 
 Two things are operator-tunable from the admin Settings card:
   - db_maintenance_enabled ("true"/"false") — checked at fire time, so toggling
@@ -16,9 +15,9 @@ from __future__ import annotations
 import asyncio
 import logging
 
-from apscheduler.schedulers.background import BackgroundScheduler
 from apscheduler.triggers.cron import CronTrigger
 
+from scribe.services.scheduler import ScheduledJob
 from scribe.services.settings import get_admin_setting
 
 logger = logging.getLogger(__name__)
@@ -26,9 +25,6 @@ logger = logging.getLogger(__name__)
 _JOB_ID = "db_maintenance_vacuum"
 _DEFAULT_HOUR = 4
 
-_scheduler: BackgroundScheduler | None = None
-_loop: asyncio.AbstractEventLoop | None = None
-
 
 async def get_maintenance_hour() -> int:
     """The configured run-hour (UTC, 0–23), clamped; default 04:00."""
@@ -45,23 +41,20 @@ async def is_maintenance_enabled() -> bool:
     return (await get_admin_setting("db_maintenance_enabled", "true")) != "false"
 
 
-def _run_maintenance_threadsafe() -> None:
+async def _run_maintenance() -> None:
-    """APScheduler invokes this from a worker thread; bridge into the loop."""
+    if not await is_maintenance_enabled():
-    if _loop is None:
+        logger.debug("db maintenance: disabled, skipping scheduled run")
-        logger.warning("db maintenance scheduler: no loop registered")
         return
+    from scribe.services.db_maintenance import run_maintenance
+    await run_maintenance()
 
-    async def _runner():
-        try:
-            if not await is_maintenance_enabled():
-                logger.debug("db maintenance: disabled, skipping scheduled run")
-                return
-            from scribe.services.db_maintenance import run_maintenance
-            await run_maintenance()
-        except Exception:
-            logger.exception("db maintenance run failed")
 
-    asyncio.run_coroutine_threadsafe(_runner(), _loop)
+_JOB = ScheduledJob(_JOB_ID, _run_maintenance, label="DB maintenance")
+
+
+def _trigger(hour: int) -> CronTrigger:
+    hour = hour if 0 <= hour <= 23 else _DEFAULT_HOUR
+    return CronTrigger(hour=hour, minute=0, timezone="UTC")
 
 
 def start_db_maintenance_scheduler(
@@ -72,36 +65,15 @@ def start_db_maintenance_scheduler(
     in rather than read here so we never block the event loop at startup. The
     job's enabled-gate is re-checked at every fire, so only the hour is needed
     up front."""
-    global _scheduler, _loop
-    if _scheduler is not None:
-        return
-    _loop = loop
     hour = hour if 0 <= hour <= 23 else _DEFAULT_HOUR
-    _scheduler = BackgroundScheduler()
+    _JOB.start(loop, _trigger(hour), describe=f"daily {hour:02d}:00 UTC")
-    _scheduler.add_job(
-        _run_maintenance_threadsafe,
-        trigger=CronTrigger(hour=hour, minute=0, timezone="UTC"),
-        id=_JOB_ID,
-        replace_existing=True,
-    )
-    _scheduler.start()
-    logger.info("DB maintenance scheduler started (daily %02d:00 UTC)", hour)
 
 
 def reschedule_db_maintenance(hour: int) -> None:
     """Move the live job to a new UTC hour (called when the admin changes it)."""
-    if _scheduler is None:
-        return
     hour = hour if 0 <= hour <= 23 else _DEFAULT_HOUR
-    _scheduler.reschedule_job(
+    _JOB.reschedule(_trigger(hour), describe=f"{hour:02d}:00 UTC")
-        _JOB_ID, trigger=CronTrigger(hour=hour, minute=0, timezone="UTC")
-    )
-    logger.info("DB maintenance scheduler rescheduled to %02d:00 UTC", hour)
 
 
 def stop_db_maintenance_scheduler() -> None:
-    global _scheduler
+    _JOB.stop()
-    if _scheduler is not None:
-        _scheduler.shutdown(wait=False)
-        _scheduler = None
-        logger.info("DB maintenance scheduler stopped")

src/scribe/services/dedup.py

@@ -32,6 +32,7 @@ from scribe.models import async_session
 from scribe.models.embedding import NoteEmbedding
 from scribe.models.note import Note
 from scribe.models.rulebook import Rule
+from scribe.models.base import iso
 from scribe.services import embeddings as embeddings_svc
 # Imported rather than redeclared: no service imports this module (the create
 # gate is called from the routes/tools layer), so there is no cycle to dodge,
@@ -592,8 +593,8 @@ async def find_duplicate_records(
                 titles[int(i)] = t
                 records[int(i)] = d or {}
                 meta[int(i)] = {
-                    "created_at": created.isoformat() if created else None,
+                    "created_at": iso(created),
-                    "updated_at": updated.isoformat() if updated else None,
+                    "updated_at": iso(updated),
                     "task_kind": task_kind,
                 }
     except Exception:

src/scribe/services/knowledge.py

@@ -16,12 +16,14 @@ endorsed, so a one-off direct share has to be searched for rather than arriving
 in your ambient lists.
 """
 import json
+import re
 import logging
 
 from sqlalchemy import and_, func, or_, select
 
 from scribe.models import async_session
 from scribe.models.note import Note
+from scribe.models.base import iso
 from scribe.services.access import browsable_notes_clause, readable_notes_clause
 
 logger = logging.getLogger(__name__)
@@ -75,6 +77,10 @@ def location_matches(data: dict | None, parts: dict[str, str]) -> bool:
         if all(
             _path_matches((loc.get(key) or "").strip(), want)
             if key == "path"
+            # Repo names are recorded free-form ("Scribe" / "FabledScribe" /
+            # "fabledscribe") — case is never the distinguishing thing (#2874).
+            else (loc.get(key) or "").strip().lower() == want.lower()
+            if key == "repo"
             else (loc.get(key) or "").strip() == want
             for key, want in parts.items()
         ):
@@ -98,6 +104,11 @@ def location_jsonpath(parts: dict[str, str]) -> str:
         if key == "path":
             prefix = json.dumps(want.rstrip("/") + "/")
             filters.append(f"(@.path == {literal} || @.path starts with {prefix})")
+        elif key == "repo":
+            # Case-insensitive, anchored, regex-escaped (#2874) — mirrors the
+            # Python dialect's .lower() compare.
+            pattern = json.dumps("^" + re.escape(want) + "$")
+            filters.append(f'(@.repo like_regex {pattern} flag "i")')
         else:
             filters.append(f"@.{key} == {literal}")
     return f"$.locations[*] ? ({' && '.join(filters)})"
@@ -211,8 +222,8 @@ def _note_to_item(note: Note) -> dict:
         # These lists now include records shared with the caller, so the client
         # needs the owner to tell "mine" from "someone else's" in a mixed list.
         "user_id": note.user_id,
-        "created_at": note.created_at.isoformat(),
+        "created_at": iso(note.created_at),
-        "updated_at": note.updated_at.isoformat(),
+        "updated_at": iso(note.updated_at),
     }
     # Drift verdict (#2086), when one has been recorded. Included here rather
     # than decorated on by the snippet layer because `current` is derivable from
@@ -249,7 +260,7 @@ def _note_to_item(note: Note) -> dict:
         item["task_kind"] = note.task_kind
         item["status"] = note.status
         item["priority"] = note.priority
-        item["due_date"] = note.due_date.isoformat() if note.due_date else None
+        item["due_date"] = iso(note.due_date)
 
     return item
 

src/scribe/services/logging.py

@@ -194,18 +194,14 @@ async def delete_old_logs(retention_days: int) -> int:
         return result.rowcount
 
 
-async def _retention_loop() -> None:
+async def _retention_tick() -> None:
-    while True:
+    deleted = await delete_old_logs(Config.LOG_RETENTION_DAYS)
-        await asyncio.sleep(3600)  # hourly
+    if deleted:
-        try:
+        logger.info("Log retention: deleted %d old log entries", deleted)
-            deleted = await delete_old_logs(Config.LOG_RETENTION_DAYS)
-            if deleted:
-                logger.info("Log retention: deleted %d old log entries", deleted)
-        except Exception:
-            logger.exception("Error in log retention cleanup")
 
 
 def start_log_retention_loop() -> None:
     global _retention_task
     if _retention_task is None or _retention_task.done():
-        _retention_task = asyncio.create_task(_retention_loop())
+        from scribe.services.background import start_periodic
+        _retention_task = start_periodic(3600, _retention_tick, label="log_retention")  # hourly

src/scribe/services/milestones.py

@@ -235,12 +235,6 @@ async def get_project_milestone_summaries(
 
 
 async def get_project_milestone_summary(user_id: int, project_id: int) -> list[dict]:
-    """Return ordered list of milestones with their progress stats."""
+    """Ordered milestones with progress — the one-project view of
-    milestones = await list_milestones(user_id, project_id)
+    get_project_milestone_summaries (two queries, not N+1)."""
-    result = []
+    return (await get_project_milestone_summaries(user_id, [project_id])).get(project_id, [])
-    for m in milestones:
-        progress = await get_milestone_progress(m.id)
-        entry = m.to_dict()
-        entry.update(progress)
-        result.append(entry)
-    return result

src/scribe/services/note_usage.py

@@ -36,6 +36,7 @@ from sqlalchemy import case, func, select
 
 from scribe.models import async_session
 from scribe.models.note_usage import PULLED, SURFACED, NoteUsageEvent
+from scribe.models.base import iso
 
 logger = logging.getLogger(__name__)
 
@@ -232,13 +233,13 @@ async def usage_for_notes(note_ids: list[int]) -> dict[int, dict]:
             slot["ambient_count"] = int(n)
         elif event == SURFACED:
             slot["surfaced_count"] = int(n)
-            slot["last_surfaced_at"] = last_at.isoformat() if last_at else None
+            slot["last_surfaced_at"] = iso(last_at)
         elif event == PULLED:
             # Pulls are pulls regardless of what surfaced the record — the
             # question a pull answers ("did anyone ever open this?") doesn't
             # depend on how it was found.
             slot["pull_count"] = slot["pull_count"] + int(n)
-            latest = last_at.isoformat() if last_at else None
+            latest = iso(last_at)
             if latest and (slot["last_pulled_at"] or "") < latest:
                 slot["last_pulled_at"] = latest
     return out

src/scribe/services/notifications.py

@@ -3,17 +3,20 @@
 import asyncio
 import json
 import logging
-from datetime import date, datetime, time, timezone
+from datetime import date, datetime, time, timedelta, timezone
 
-from sqlalchemy import func, select, text
+from sqlalchemy import delete as sa_delete, func, select, text
+from sqlalchemy import update as sa_update
 
 from scribe.models import async_session
 from scribe.models.app_log import AppLog
 from scribe.models.note import Note
-from scribe.models.setting import Setting
+from scribe.models.notification import Notification
 from scribe.models.user import User
+from scribe.models.base import iso
 from scribe.services.email import _email_html, is_smtp_configured, send_email
 from scribe.services.logging import log_audit
+from scribe.services.settings import get_setting
 
 logger = logging.getLogger(__name__)
 
@@ -29,13 +32,7 @@ SECURITY_EVENT_LABELS = {
 
 async def _get_user_notification_pref(user_id: int, key: str) -> bool:
     """Check if a user has a notification preference enabled (default True)."""
-    async with async_session() as session:
+    return await get_setting(user_id, key, "true") != "false"
-        result = await session.execute(
-            select(Setting).where(Setting.user_id == user_id, Setting.key == key)
-        )
-        setting = result.scalar_one_or_none()
-        # Default to enabled
-        return setting.value != "false" if setting else True
 
 
 async def _get_user_email(user_id: int) -> str | None:
@@ -222,7 +219,7 @@ async def check_due_tasks() -> None:
                 for task in user_tasks:
                     overdue = task.due_date < today if task.due_date else False
                     date_color = "#ef4444" if overdue else "#374151"
-                    date_label = f'<span style="color: {date_color};">{task.due_date.isoformat()}</span>' if task.due_date else ""
+                    date_label = f'<span style="color: {date_color};">{iso(task.due_date)}</span>' if task.due_date else ""
                     overdue_badge = ' <span style="color:#ef4444;font-weight:600;font-size:11px;">(overdue)</span>' if overdue else ""
                     task_rows += (
                         f'<tr>'
@@ -261,13 +258,10 @@ _NOTIFICATION_RETENTION_DAYS = 30
 
 async def purge_old_read_notifications(retention_days: int = _NOTIFICATION_RETENTION_DAYS) -> int:
     """Delete already-read in-app notifications older than retention_days."""
-    from datetime import timedelta
-    from sqlalchemy import delete
-    from scribe.models.notification import Notification
     cutoff = datetime.now(timezone.utc) - timedelta(days=retention_days)
     async with async_session() as session:
         result = await session.execute(
-            delete(Notification).where(
+            sa_delete(Notification).where(
                 Notification.read_at.isnot(None),
                 Notification.read_at < cutoff,
             )
@@ -276,25 +270,21 @@ async def purge_old_read_notifications(retention_days: int = _NOTIFICATION_RETEN
         return result.rowcount or 0
 
 
-async def _notification_loop() -> None:
+async def _notification_tick() -> None:
-    while True:
+    try:
-        await asyncio.sleep(3600)  # hourly
+        await check_due_tasks()
-        try:
+    except Exception:
-            await check_due_tasks()
+        logger.exception("Error in notification loop")
-        except Exception:
+    removed = await purge_old_read_notifications()
-            logger.exception("Error in notification loop")
+    if removed:
-        try:
+        logger.info("Notification retention: deleted %d read notification(s)", removed)
-            removed = await purge_old_read_notifications()
-            if removed:
-                logger.info("Notification retention: deleted %d read notification(s)", removed)
-        except Exception:
-            logger.exception("Error in notification retention cleanup")
 
 
 def start_notification_loop() -> None:
     global _notification_task
     if _notification_task is None or _notification_task.done():
-        _notification_task = asyncio.create_task(_notification_loop())
+        from scribe.services.background import start_periodic
+        _notification_task = start_periodic(3600, _notification_tick, label="notifications")  # hourly
 
 
 # ---------------------------------------------------------------------------
@@ -303,7 +293,6 @@ def start_notification_loop() -> None:
 
 async def create_in_app_notification(user_id: int, notif_type: str, payload: dict):
     """Create an in-app Notification record."""
-    from scribe.models.notification import Notification
     async with async_session() as session:
         n = Notification(user_id=user_id, type=notif_type, payload=payload)
         session.add(n)
@@ -316,11 +305,10 @@ async def _fire_share_email(user_id: int, subject: str, body_text: str) -> None:
     try:
         if not await is_smtp_configured():
             return
-        async with async_session() as session:
+        email = await _get_user_email(user_id)
-            user = await session.get(User, user_id)
+        if email:
-        if user and user.email:
             html = _email_html(subject, f"<p>{body_text.replace(chr(10), '<br>')}</p>")
-            await send_email(user.email, subject, html)
+            await send_email(email, subject, html)
     except Exception:
         logger.exception("Share email notification failed for user %d", user_id)
 
@@ -427,7 +415,6 @@ async def notify_group_added(
 
 
 async def list_in_app_notifications(user_id: int, unread_only: bool = True) -> list[dict]:
-    from scribe.models.notification import Notification
     async with async_session() as session:
         q = select(Notification).where(Notification.user_id == user_id)
         if unread_only:
@@ -438,7 +425,6 @@ async def list_in_app_notifications(user_id: int, unread_only: bool = True) -> l
 
 
 async def unread_notification_count(user_id: int) -> int:
-    from scribe.models.notification import Notification
     async with async_session() as session:
         result = await session.execute(
             select(func.count()).where(
@@ -450,8 +436,6 @@ async def unread_notification_count(user_id: int) -> int:
 
 
 async def mark_notification_read(user_id: int, notification_id: int) -> bool:
-    from scribe.models.notification import Notification
-    from datetime import timezone as tz
     async with async_session() as session:
         n = (await session.execute(
             select(Notification).where(
@@ -461,21 +445,17 @@ async def mark_notification_read(user_id: int, notification_id: int) -> bool:
         )).scalar_one_or_none()
         if not n:
             return False
-        from datetime import datetime
+        n.read_at = datetime.now(timezone.utc)
-        n.read_at = datetime.now(tz.utc)
         await session.commit()
         return True
 
 
 async def mark_all_notifications_read(user_id: int) -> int:
-    from scribe.models.notification import Notification
-    from datetime import datetime, timezone as tz
-    from sqlalchemy import update as sa_update
     async with async_session() as session:
         result = await session.execute(
             sa_update(Notification)
             .where(Notification.user_id == user_id, Notification.read_at.is_(None))
-            .values(read_at=datetime.now(tz.utc))
+            .values(read_at=datetime.now(timezone.utc))
             .returning(Notification.id)
         )
         await session.commit()

src/scribe/services/planning.py

@@ -60,12 +60,7 @@ async def start_planning(user_id: int, project_id: int, title: str) -> dict:
 
     return {
         "milestone": milestone.to_dict(),
-        "applicable_rules": applicable["rules"],
+        **rulebooks_svc.rules_payload(applicable),
-        "subscribed_rulebooks": applicable["subscribed_rulebooks"],
-        "applicable_rules_truncated": applicable["truncated"],
-        "project_rules": applicable.get("project_rules", []),
-        "suppressed_rules": applicable.get("suppressed_rules", []),
-        "suppressed_topics": applicable.get("suppressed_topics", []),
         "project_goal": getattr(project, "goal", "") or "",
         "open_task_count": open_count,
     }

src/scribe/services/plugin_context.py

@@ -27,6 +27,7 @@ from scribe.services import knowledge as knowledge_svc
 from scribe.services import notes as notes_svc
 from scribe.services import projects as projects_svc
 from scribe.services import rulebooks as rulebooks_svc
+from scribe.services import shape_ledger as shape_ledger_svc
 from scribe.services import snippets as snippets_svc
 from scribe.services.access import label_shared_items, owner_names_for
 from scribe.services.embeddings import semantic_search_notes
@@ -703,6 +704,8 @@ async def build_write_path_hint(
     project_id: int = 0,
     exclude_ids: list[int] | None = None,
     exclude_sync_ids: list[int] | None = None,
+    stamp_shapes: list[tuple[str, str]] | None = None,
+    repo_key: str = "",
 ) -> dict:
     """Prior-art hint for the plugin's PreToolUse hook on Write/Edit.
 
@@ -749,9 +752,20 @@ async def build_write_path_hint(
     un-scored surfacing now has its own home: every arm emits note_usage_events,
     tagged 'write_path_sync' vs 'write_path_place' vs 'write_path_semantic', so
     each claim's pull-through rate is measurable on its own.
+
+    ``stamp_shapes`` turns the same request into the ledger's write-path feed
+    (#2791): the (kind, name) definitions the hook saw in — or enclosing —
+    the payload. When the session has PULLED a snippet recently and this
+    payload references or resembles it, those shapes land as `instance` rows
+    (classified_by=hook, see shape_ledger.stamp_write_path_instances) and
+    the result's ``stamped`` lists them. The route passes it only for a
+    caller allowed to write — a read-scoped key gets the hint, never the
+    stamp. ``repo_key`` (the hook's remote, normalised) homes a provisional
+    row for a shape the ledger has not synced yet.
     """
     cfg = await get_writepath_config(user_id)
-    empty = {"context": "", "note_ids": [], "sync_note_ids": [], "config": cfg}
+    empty = {"context": "", "note_ids": [], "sync_note_ids": [], "config": cfg,
+             "stamped": [], "divergence": []}
     path = (path or "").strip()
     if not cfg["enabled"] or not path:
         return empty
@@ -800,6 +814,15 @@ async def build_write_path_hint(
         seen.add(nid)
         placed.append(("nearby", item))
 
+    # The stamping feed's "actually pulled it" half (#2791). Read once, before
+    # the semantic arm, because the arm's query doubles as the resemblance
+    # test: a pulled snippet this session already saw (so it sits in `seen`)
+    # must still be SCORED for this payload — it just isn't re-listed.
+    pulled: dict = {}
+    if stamp_shapes:
+        pulled = await shape_ledger_svc.recent_pulls(user_id)
+    resembles: dict[int, float] = {}
+
     # --- arm 2: by meaning ---
     scored: list[tuple[str, dict]] = []
     remaining = top_k - len(synced) - len(placed)
@@ -821,12 +844,15 @@ async def build_write_path_hint(
         query = concept_query(query) or query
     if remaining > 0 and query:
         t0 = time.perf_counter()
+        # Pulled-and-seen ids stay in the query (as evidence) but never in
+        # the menu — the dedup contract holds, the resemblance still lands.
+        pulled_seen = seen & set(pulled)
         hits = await semantic_search_notes(
             user_id, query,
-            limit=remaining,
+            limit=remaining + len(pulled_seen),
             threshold=cfg["threshold"],
             project_id=scope_project,
-            exclude_ids=seen,
+            exclude_ids=seen - pulled_seen,
             # Snippets AND recorded experience (#2246). This arm was
             # snippets-only, which is auto-inject's mistake inverted: an issue
             # saying "we tried this and it deadlocked", or a dev-log recording
@@ -845,6 +871,11 @@ async def build_write_path_hint(
             # the browse scope and never surfaces a one-to-one direct share.
             scope="browse",
         )
+        resembles = {
+            int(note.id): float(score) for score, note in hits
+            if int(note.id) in pulled
+        }
+        hits = [(s, n) for s, n in hits if int(n.id) not in seen][:remaining]
         record_retrieval(
             user_id=user_id, source="write_path", query=query,
             threshold=cfg["threshold"], limit=remaining,
@@ -879,7 +910,32 @@ async def build_write_path_hint(
                 ))
 
     menu = (placed + scored)[:max(0, top_k - len(synced))]
-    if not synced and not menu:
+
+    # The stamp runs whether or not anything is rendered — after dedup, the
+    # common case is a silent hint and a pulled canon being instantiated.
+    stamped: list[dict] = []
+    if stamp_shapes and pulled:
+        try:
+            stamped = await shape_ledger_svc.stamp_write_path_instances(
+                user_id, project_id, path=path, shapes=stamp_shapes,
+                code=code or "", pulled=pulled, resembles=resembles,
+                repo_key=repo_key,
+            )
+        except Exception:
+            logger.warning("Write-path ledger stamping failed", exc_info=True)
+    # The in-band button-B check (#2793): the hook named the shapes being
+    # written; if this directory+kind is canon-dense and a named shape isn't
+    # (about to be) an instance of that canon, say so NOW — at the write,
+    # not at the next audit.
+    divergence: list[dict] = []
+    if stamp_shapes and project_id:
+        try:
+            divergence = await shape_ledger_svc.write_time_divergence(
+                project_id, path, stamp_shapes, stamped
+            )
+        except Exception:
+            logger.warning("write-time divergence check failed", exc_info=True)
+    if not synced and not menu and not stamped and not divergence:
         return empty
 
     owners = await owner_names_for({
@@ -943,6 +999,11 @@ async def build_write_path_hint(
         note_ids.append(int(item["id"]))
         lines.append(_prior_art_line(item, marker, owner, foreign_lang))
 
+    if stamped:
+        lines.append(_stamp_line(path, stamped))
+    if divergence:
+        lines.append(_divergence_line(path, divergence))
+
     # Split by arm, which is the whole reason this table exists. The place arm
     # carries no score and so has no home in retrieval_logs; before #2085 a
     # snippet surfaced BY PLACE left no trace anywhere, making the arm that
@@ -964,9 +1025,46 @@ async def build_write_path_hint(
         "note_ids": note_ids,
         "sync_note_ids": sync_note_ids,
         "config": cfg,
+        "stamped": stamped,
+        "divergence": divergence,
     }
 
 
+def _divergence_line(path: str, divergence: list[dict]) -> str:
+    """Button B where button A is canon — named at the write (#2793)."""
+    parts = [
+        f"`{('.' if d['kind'] == 'css' else '') + d['symbol']}` → #{d['canon_snippet_id']} "
+        f"({d['instances']} of {d['judged']} judged siblings are its instances)"
+        for d in divergence
+    ]
+    return (
+        f"> Divergence check at `{path}`: a canon dominates this directory — "
+        f"{'; '.join(parts)}. If this is a new instance, pull that snippet "
+        "and build from it; if it is a deliberate departure, "
+        "`classify_shapes(..., status=\"variant\", reason=…)` records the why; "
+        "otherwise it reads as unintended divergence."
+    )
+
+
+def _stamp_line(path: str, stamped: list[dict]) -> str:
+    """One line saying what the ledger just recorded, so the session can
+    correct a wrong stamp in the moment rather than an audit finding it."""
+    by_snippet: dict[int, list[str]] = {}
+    for row in stamped:
+        label = f".{row['symbol']}" if row["kind"] == "css" else row["symbol"]
+        by_snippet.setdefault(int(row["snippet_id"]), []).append(f"`{label}`")
+    parts = [
+        f"{', '.join(names)} → instance of #{sid}"
+        for sid, names in by_snippet.items()
+    ]
+    return (
+        f"> Shape accounting: recorded at `{path}` — {'; '.join(parts)} "
+        "(classified_by=hook: you pulled that snippet this session and this "
+        "code references/resembles it). Not an instance? `classify_shapes` "
+        "overrides a hook stamp."
+    )
+
+
 async def _topic_titles(topic_ids: set[int]) -> dict[int, str]:
     """Map topic_id -> title for the given ids (live topics only)."""
     if not topic_ids:

src/scribe/services/projects.py

@@ -208,54 +208,9 @@ async def get_project_summaries(
 
 
 async def get_project_summary(user_id: int, project_id: int) -> dict:
-    """Return task counts by status, note count, and last activity."""
+    """Return task counts by status, note count, and last activity — the
-    async with async_session() as session:
+    one-project view of get_project_summaries (one rule, not two copies)."""
-        # Task counts by status
+    return (await get_project_summaries(user_id, [project_id]))[project_id]
-        task_rows = await session.execute(
-            select(Note.status, func.count(Note.id))
-            .where(
-                Note.user_id == user_id,
-                Note.project_id == project_id,
-                Note.status.isnot(None),
-                Note.deleted_at.is_(None),
-            )
-            .group_by(Note.status)
-        )
-        # Initialise all three lifecycle keys to 0 so consumers can sum them
-        # safely without `?? 0` guards. Frontend interface declares all three
-        # as required; rendering `undefined + N` yields NaN.
-        task_counts: dict[str, int] = {"todo": 0, "in_progress": 0, "done": 0}
-        for status, count in task_rows.fetchall():
-            task_counts[status] = count
-
-        # Note count (non-tasks)
-        note_count_result = await session.scalar(
-            select(func.count(Note.id)).where(
-                Note.user_id == user_id,
-                Note.project_id == project_id,
-                Note.status.is_(None),
-                Note.deleted_at.is_(None),
-            )
-        )
-        note_count = note_count_result or 0
-
-        # Last activity
-        last_activity_result = await session.scalar(
-            select(func.max(Note.updated_at)).where(
-                Note.user_id == user_id,
-                Note.project_id == project_id,
-            )
-        )
-
-        from scribe.services.milestones import get_project_milestone_summary
-        milestone_summary = await get_project_milestone_summary(user_id, project_id)
-
-        return {
-            "task_counts": task_counts,
-            "note_count": note_count,
-            "last_activity": last_activity_result.isoformat() if last_activity_result else None,
-            "milestone_summary": milestone_summary,
-        }
 
 
 # ---------------------------------------------------------------------------
@@ -279,8 +234,6 @@ async def list_projects_for_user(user_id: int, status: str | None = None) -> lis
     """Owned projects + shared projects, each dict has 'permission' field."""
     from scribe.models.group import GroupMembership
     from scribe.models.share import ProjectShare
-    from scribe.services.access import PERMISSION_RANK
-
     owned = await list_projects(user_id, status)
     owned_ids = {p.id for p in owned}
 
@@ -307,13 +260,14 @@ async def list_projects_for_user(user_id: int, status: str | None = None) -> lis
                 )
             )).scalars().all()
 
-    seen: dict[int, str] = {}
+    from scribe.services.sharing import best_permission_by
-    for share in list(shared_direct) + list(shared_group):
+    seen = {
-        if share.project_id in owned_ids:
+        pid: perm
-            continue
+        for pid, perm in best_permission_by(
-        prev = seen.get(share.project_id)
+            list(shared_direct) + list(shared_group), "project_id"
-        if prev is None or PERMISSION_RANK[share.permission] > PERMISSION_RANK[prev]:
+        ).items()
-            seen[share.project_id] = share.permission
+        if pid not in owned_ids
+    }
 
     for pid, perm in seen.items():
         if status:

src/scribe/services/recurrence_scheduler.py

@@ -4,7 +4,7 @@ Every 15 minutes, creates the next occurrence of any recurring task whose spawn
 time has arrived — draining `recurrence_next_spawn_at`, which is armed on task
 completion. Without this job, recurring tasks would never recur.
 
-Uses the BackgroundScheduler pattern shared with the other *_scheduler modules.
+One ScheduledJob (services/scheduler.py), like the other *_scheduler modules.
 (Formerly event_scheduler.py, which also ran event reminders + CalDAV sync;
 those were removed when the calendar surface was retired.)
 """
@@ -13,52 +13,27 @@ from __future__ import annotations
 import asyncio
 import logging
 
-from apscheduler.schedulers.background import BackgroundScheduler
 from apscheduler.triggers.interval import IntervalTrigger
 
-logger = logging.getLogger(__name__)
+from scribe.services.scheduler import ScheduledJob
 
-_scheduler: BackgroundScheduler | None = None
+logger = logging.getLogger(__name__)
-_loop: asyncio.AbstractEventLoop | None = None
 
 
 async def _run_recurrence_spawn() -> None:
     from scribe.services.recurrence import spawn_recurring_tasks  # noqa: PLC0415
-    try:
+    await spawn_recurring_tasks()
-        await spawn_recurring_tasks()
-    except Exception:
-        logger.warning("Recurring-task spawn job failed", exc_info=True)
 
 
-def _run_recurrence_spawn_threadsafe(loop: asyncio.AbstractEventLoop) -> None:
+_JOB = ScheduledJob("recurrence_spawn", _run_recurrence_spawn, label="Recurring-task spawn")
-    asyncio.run_coroutine_threadsafe(_run_recurrence_spawn(), loop)
 
 
 def start_recurrence_scheduler(loop: asyncio.AbstractEventLoop) -> None:
-    global _scheduler, _loop
-    if _scheduler is not None:
-        return
-    _loop = loop
-    _scheduler = BackgroundScheduler()
-
     # Spawn the next occurrence of due recurring tasks every 15 minutes.
     # Without this job, recurrence_next_spawn_at is armed on completion but
     # never drained, so recurring tasks never recur.
-    _scheduler.add_job(
+    _JOB.start(loop, IntervalTrigger(minutes=15), describe="recurring-task spawn every 15m")
-        _run_recurrence_spawn_threadsafe,
-        trigger=IntervalTrigger(minutes=15),
-        args=[loop],
-        id="recurrence_spawn",
-        replace_existing=True,
-    )
-
-    _scheduler.start()
-    logger.info("Recurrence scheduler started (recurring-task spawn every 15m)")
 
 
 def stop_recurrence_scheduler() -> None:
-    global _scheduler
+    _JOB.stop()
-    if _scheduler is not None:
-        _scheduler.shutdown(wait=False)
-        _scheduler = None
-        logger.info("Recurrence scheduler stopped")

src/scribe/services/repo_bindings.py

@@ -68,8 +68,16 @@ async def resolve_project(user_id: int, raw_repo: str) -> int | None:
         return row.scalar_one_or_none()
 
 
-async def set_binding(user_id: int, raw_repo: str, project_id: int) -> RepoBinding:
+async def set_binding(
-    """Create or update the binding for a repo. Idempotent on (user, repo_key)."""
+    user_id: int, raw_repo: str, project_id: int, ref: str | None = None,
+) -> RepoBinding:
+    """Create or update the binding for a repo. Idempotent on (user, repo_key).
+
+    ``ref`` (#2873) is the branch the coverage refresh reads for this
+    binding: a name sets it, ``""`` clears it back to the forge's default
+    branch, ``None`` leaves whatever stands (a re-bind that only moves the
+    project keeps the ref it had).
+    """
     key = normalize_repo_key(raw_repo)
     if not key:
         raise ValueError("repo remote is empty or unparseable")
@@ -85,6 +93,8 @@ async def set_binding(user_id: int, raw_repo: str, project_id: int) -> RepoBindi
             session.add(binding)
         else:
             binding.project_id = project_id
+        if ref is not None:
+            binding.ref = ref.strip() or None
         await session.commit()
         await session.refresh(binding)
         return binding
@@ -100,6 +110,18 @@ async def list_bindings(user_id: int) -> list[RepoBinding]:
         return list(rows.scalars().all())
 
 
+async def bindings_for_project(user_id: int, project_id: int) -> list[RepoBinding]:
+    """Every binding of a project — key AND the ref its ledger follows (#2873)."""
+    async with async_session() as session:
+        rows = await session.execute(
+            select(RepoBinding).where(
+                RepoBinding.user_id == user_id,
+                RepoBinding.project_id == project_id,
+            ).order_by(RepoBinding.repo_key)
+        )
+        return list(rows.scalars().all())
+
+
 async def keys_for_project(user_id: int, project_id: int) -> list[str]:
     """Every repo key bound to a project — the snippet→forge join (#2691).
 

src/scribe/services/rulebooks.py

@@ -779,3 +779,22 @@ async def get_applicable_rules(
         "truncated": truncated,
         "subscribed_rulebooks": subscribed_rulebooks,
     }
+
+
+def rules_payload(applicable: dict) -> dict:
+    """The caller-facing shape of a get_applicable_rules() result.
+
+    Every surface that hands rules to an agent (enter_project, get_project,
+    get_milestone, get_task for legacy plans, start_planning) carries the
+    same six keys under the same names — so a reader learns them once. One
+    place renames `rules` → `applicable_rules` and `truncated` →
+    `applicable_rules_truncated`; the tools merge this into their payloads.
+    """
+    return {
+        "applicable_rules": applicable["rules"],
+        "applicable_rules_truncated": applicable["truncated"],
+        "subscribed_rulebooks": applicable["subscribed_rulebooks"],
+        "project_rules": applicable.get("project_rules", []),
+        "suppressed_rules": applicable.get("suppressed_rules", []),
+        "suppressed_topics": applicable.get("suppressed_topics", []),
+    }

src/scribe/services/scheduler.py

@@ -0,0 +1,78 @@
+"""One APScheduler job bridged into the asyncio loop — the shape the four
+*_scheduler modules (recurrence spawn, auto-pin scan, trash purge, DB
+maintenance) each used to carry a private copy of.
+
+APScheduler's BackgroundScheduler fires from a worker thread; the work is
+async and must run on the app's loop, so the fire is bridged with
+``run_coroutine_threadsafe``. Each job is a module-level singleton: start is
+idempotent, stop shuts the scheduler down, and a job whose trigger the
+operator can change (the maintenance hour) reschedules the live job instead
+of restarting.
+"""
+from __future__ import annotations
+
+import asyncio
+import logging
+from collections.abc import Awaitable, Callable
+
+from apscheduler.schedulers.background import BackgroundScheduler
+
+logger = logging.getLogger(__name__)
+
+
+class ScheduledJob:
+    """A named APScheduler job that awaits ``work()`` on the asyncio loop.
+
+    ``work`` is an async callable; exceptions it raises are logged under
+    ``label`` and never propagate into APScheduler's thread.
+    """
+
+    def __init__(self, job_id: str, work: Callable[[], Awaitable[None]], *, label: str) -> None:
+        self.job_id = job_id
+        self._work = work
+        self.label = label
+        self._scheduler: BackgroundScheduler | None = None
+        self._loop: asyncio.AbstractEventLoop | None = None
+
+    @property
+    def running(self) -> bool:
+        return self._scheduler is not None
+
+    def _fire(self) -> None:
+        """APScheduler invokes this from its worker thread; bridge into the loop."""
+        if self._loop is None:
+            logger.warning("%s scheduler: no loop registered", self.label)
+            return
+
+        async def _runner() -> None:
+            try:
+                await self._work()
+            except Exception:
+                logger.exception("%s run failed", self.label)
+
+        asyncio.run_coroutine_threadsafe(_runner(), self._loop)
+
+    def start(self, loop: asyncio.AbstractEventLoop, trigger, *, describe: str = "") -> None:
+        """Start the job on ``trigger``. Idempotent — a second start is a no-op."""
+        if self._scheduler is not None:
+            return
+        self._loop = loop
+        self._scheduler = BackgroundScheduler()
+        self._scheduler.add_job(
+            self._fire, trigger=trigger, id=self.job_id, replace_existing=True,
+        )
+        self._scheduler.start()
+        logger.info("%s scheduler started%s", self.label, f" ({describe})" if describe else "")
+
+    def reschedule(self, trigger, *, describe: str = "") -> None:
+        """Move the live job to a new trigger; a no-op when not running."""
+        if self._scheduler is None:
+            return
+        self._scheduler.reschedule_job(self.job_id, trigger=trigger)
+        logger.info("%s scheduler rescheduled%s", self.label, f" to {describe}" if describe else "")
+
+    def stop(self) -> None:
+        if self._scheduler is not None:
+            self._scheduler.shutdown(wait=False)
+            self._scheduler = None
+            logger.info("%s scheduler stopped", self.label)

src/scribe/services/settings.py

@@ -8,6 +8,13 @@ from scribe.models.user import User
 
 logger = logging.getLogger(__name__)
 
+# What a stored credential looks like on the wire. Every surface that READS a
+# secret (smtp_password, forge_webhook_secret, a forge token) returns this
+# when one is set; every surface that WRITES one treats this value coming back
+# as "unchanged", never as a request to store eight asterisks over the real
+# credential. One constant so the read and write halves cannot disagree.
+SECRET_MASK = "********"
+
 
 async def get_admin_setting(key: str, default: str = "") -> str:
     """Read an instance-global setting (one stored on an admin account).

src/scribe/services/sharing.py

@@ -10,6 +10,7 @@ from scribe.models.note import Note
 from scribe.models.project import Project
 from scribe.models.share import NoteShare, ProjectShare
 from scribe.models.user import User
+from scribe.models.base import iso
 
 logger = logging.getLogger(__name__)
 
@@ -31,7 +32,7 @@ async def _enrich_shares(session, shares) -> list[dict]:
     return result
 
 
-def _deduplicate_by_permission(shares, id_attr: str) -> dict[int, str]:
+def best_permission_by(shares, id_attr: str) -> dict[int, str]:
     """Return {resource_id: best_permission} keeping the highest-ranked permission per resource."""
     from scribe.services.access import PERMISSION_RANK
     seen: dict[int, str] = {}
@@ -210,7 +211,7 @@ async def list_shared_with_me(user_id: int) -> dict:
                 )
             )).scalars().all()
 
-        seen_projects = _deduplicate_by_permission(list(proj_direct) + list(proj_group), "project_id")
+        seen_projects = best_permission_by(list(proj_direct) + list(proj_group), "project_id")
 
         projects = []
         for pid, perm in seen_projects.items():
@@ -223,7 +224,7 @@ async def list_shared_with_me(user_id: int) -> dict:
                     "description": proj.description,
                     "status": proj.status,
                     "color": proj.color,
-                    "updated_at": proj.updated_at.isoformat(),
+                    "updated_at": iso(proj.updated_at),
                     "owner_username": owner.username if owner else None,
                     "permission": perm,
                 })
@@ -241,7 +242,7 @@ async def list_shared_with_me(user_id: int) -> dict:
                 )
             )).scalars().all()
 
-        seen_notes = _deduplicate_by_permission(list(note_direct) + list(note_group), "note_id")
+        seen_notes = best_permission_by(list(note_direct) + list(note_group), "note_id")
 
         notes = []
         for nid, perm in seen_notes.items():
@@ -253,7 +254,7 @@ async def list_shared_with_me(user_id: int) -> dict:
                     "title": note.title,
                     "is_task": note.is_task,
                     "project_id": note.project_id,
-                    "updated_at": note.updated_at.isoformat(),
+                    "updated_at": iso(note.updated_at),
                     "owner_username": owner.username if owner else None,
                     "permission": perm,
                 })

src/scribe/services/supersession.py

@@ -181,3 +181,35 @@ async def superseded_ids(note_ids: list[int]) -> set[int]:
             .where(NoteSupersession.superseded_id.in_(note_ids))
         )).scalars().all()
     return {int(r) for r in rows}
+
+
+SUPERSEDED_HINT = (
+    "A later note claims to bring this up to date — see superseded_by. "
+    "Read this as what was true when written, and check the newer one "
+    "before acting on it."
+)
+
+
+async def attach_relations(user_id: int, note_id: int, data: dict, *, hint: bool = False) -> None:
+    """Add both directions of the supersession relation to a note payload.
+
+    ONE seam for the REST and MCP surfaces, which must agree about what a
+    note's payload says — or the web UI and the agent would disagree about
+    whether a record is current. Both directions, because they answer
+    different questions and only one is obvious: `supersedes` is what the
+    author claimed; `superseded_by` is what a READER needs and what the note
+    itself cannot know — a stale record handed over without that marker gets
+    acted on confidently, which is worse than never surfacing it.
+
+    Omitted entirely when empty, so an ordinary note's payload doesn't grow
+    two permanently-empty lists (#2483 — a field that always says nothing
+    trains readers to skip fields). `hint=True` (the agent surface) also
+    attaches `superseded_note`, the one-sentence reading instruction.
+    """
+    rel = await get_relations(user_id, note_id)
+    if rel["supersedes"]:
+        data["supersedes"] = rel["supersedes"]
+    if rel["superseded_by"]:
+        data["superseded_by"] = rel["superseded_by"]
+        if hint:
+            data["superseded_note"] = SUPERSEDED_HINT

src/scribe/services/trash.py

@@ -8,15 +8,16 @@ trashed rows via `alive()`.
 from __future__ import annotations
 
 import uuid
-from datetime import datetime, timezone
+from datetime import datetime, timedelta, timezone
 
-from sqlalchemy import or_, select, update
+from sqlalchemy import delete as sql_delete, or_, select, update
 
 from scribe.models import async_session
 from scribe.models.note import Note
 from scribe.models.project import Project
 from scribe.models.milestone import Milestone
 from scribe.models.rulebook import Rulebook, RulebookTopic, Rule
+from scribe.models.base import iso
 
 # entity_type -> Model. Used to resolve which table a trash op targets.
 _MODEL_FOR = {
@@ -87,16 +88,15 @@ async def _cascade(session, user_id: int, etype: str, eid: int, batch: str, now)
         # FK CASCADE would handle a full DELETE on the project row, but the
         # soft-delete path keeps the project row alive; this guarantees the
         # rows are gone whether or not the project ever gets purged.
-        from sqlalchemy import delete as _sql_delete
         from scribe.models.rulebook import (
             project_rule_suppressions, project_topic_suppressions,
         )
         await session.execute(
-            _sql_delete(project_rule_suppressions)
+            sql_delete(project_rule_suppressions)
             .where(project_rule_suppressions.c.project_id == eid)
         )
         await session.execute(
-            _sql_delete(project_topic_suppressions)
+            sql_delete(project_topic_suppressions)
             .where(project_topic_suppressions.c.project_id == eid)
         )
         await _set(session, Project, [Project.user_id == user_id, Project.id == eid], batch, now)
@@ -213,7 +213,6 @@ async def restore_entity(user_id: int, entity_type: str, entity_id: int) -> int
 
 async def purge(user_id: int, batch_id: str) -> int:
     """Hard-delete every row in the batch. Irreversible."""
-    from sqlalchemy import delete as sql_delete
     n = 0
     async with async_session() as session:
         for model in _ALL:
@@ -241,7 +240,7 @@ async def list_trash(user_id: int) -> list[dict]:
                 grp = batches.setdefault(
                     r.deleted_batch_id,
                     {"batch_id": r.deleted_batch_id,
-                     "deleted_at": r.deleted_at.isoformat() if r.deleted_at else None,
+                     "deleted_at": iso(r.deleted_at),
                      "items": []},
                 )
                 grp["items"].append({
@@ -265,8 +264,6 @@ async def purge_expired(user_id: int, retention_days: int) -> int:
     user's short window prematurely destroy another's data.
     retention_days <= 0 disables auto-purge (returns 0 without touching anything).
     """
-    from datetime import timedelta
-    from sqlalchemy import delete as sql_delete
     if retention_days <= 0:
         return 0
     cutoff = datetime.now(timezone.utc) - timedelta(days=retention_days)