alembic/versions/0086_code_shape_consumers.py

@@ -0,0 +1,35 @@
+"""code_shape_consumers — the CSS consumer map (milestone 302, note 2917)
+
+Revision ID: 0086
+Revises: 0085
+Create Date: 2026-08-23
+
+CSS is watched by name, by recipe, by token and by WHAT USES IT. This table
+holds the fourth: CSS shape → the file whose markup names its class, with how
+many times. Mechanical and recomputed by every coverage sync from the repo
+archive; the analogue of code_shape_uses for styling. Cascades with the shape.
+"""
+import sqlalchemy as sa
+from alembic import op
+
+revision = "0086"
+down_revision = "0085"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "code_shape_consumers",
+        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("path", sa.Text(), nullable=False),
+        sa.Column("count", sa.Integer(), nullable=False, server_default="1"),
+        sa.Column("basis", sa.Text(), nullable=False, server_default="template"),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.text("now()")),
+        sa.UniqueConstraint("shape_id", "path", name="uq_code_shape_consumers_shape_path"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("code_shape_consumers")

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, CodeShapeEvent, CodeShapeUse  # noqa: E402, F401
+from scribe.models.code_shape import CodeShape, CodeShapeConsumer, 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/code_shape.py

@@ -265,6 +265,52 @@ class CodeShapeUse(Base):
         }
 
 
+# How a consumer edge was established (milestone 302). `template` is the
+# sync's mechanical read of a file's markup (class= / :class= / className=);
+# the vocabulary is a list so a later basis (a stylesheet `@apply`, a script's
+# classList) has a name without a schema change.
+CONSUMER_BASES = ("template",)
+
+
+class CodeShapeConsumer(Base):
+    """One consumer edge: CSS shape → the file whose markup names its class
+    (milestone 302; note 2917 — CSS is watched by name, by recipe, by token
+    and by WHAT USES IT). The analogue of CodeShapeUse for styling: `uses`
+    says what a shape calls, this says who renders a class. Rows, not prose,
+    so "is this recipe shared or scoped?" is a count, not a guess.
+
+    Mechanical and fully recomputable: every coverage sync rebuilds a repo's
+    edges from its archive, so the table is not backed up (see
+    services/backup._NOT_INCLUDED). Cascades with the shape.
+    """
+
+    __tablename__ = "code_shape_consumers"
+    __table_args__ = (
+        UniqueConstraint("shape_id", "path", name="uq_code_shape_consumers_shape_path"),
+    )
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    shape_id: Mapped[int] = mapped_column(
+        Integer, ForeignKey("code_shapes.id", ondelete="CASCADE"), nullable=False
+    )
+    path: Mapped[str] = mapped_column(Text, nullable=False)
+    count: Mapped[int] = mapped_column(Integer, nullable=False, default=1)
+    basis: Mapped[str] = mapped_column(Text, nullable=False, default="template")
+    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,
+            "path": self.path,
+            "count": self.count,
+            "basis": self.basis,
+            "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")

src/scribe/services/backup.py

@@ -92,6 +92,10 @@ _NOT_INCLUDED = [
     # deliberately not exported either, so restored projects fall back to
     # keyring-by-host resolution — the documented unpinned behavior (#2778).
     "forge_connections",
+    # Derived, like note_embeddings: the CSS consumer map (milestone 302) is
+    # rebuilt from the repo archive by every coverage sync, and carries no
+    # judgment — the first refresh after a restore recreates it exactly.
+    "code_shape_consumers",
 ]
 
 

src/scribe/services/coverage.py

@@ -555,7 +555,8 @@ async def compute_coverage(
         # The binding's own ref when it names one (#2873: a dev-first project
         # 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))
+        scan = scan_archive(await forge.archive(api_repo, ref))
+        definitions = scan.definitions
         # 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.
@@ -567,6 +568,13 @@ async def compute_coverage(
             project_id, key, definitions, seen_marker=marker
         )
         served.append((key, ref))
+        # The CSS consumer map (milestone 302) rides the same archive: which
+        # files' markup names each class. Mechanical and recomputable, so it
+        # must not be able to fail the refresh either.
+        try:
+            await shape_ledger.sync_repo_consumers(project_id, key, scan.references)
+        except Exception:
+            logger.warning("consumer map sync failed for %s", key, exc_info=True)
         # 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

src/scribe/services/shape_ledger.py

@@ -30,7 +30,9 @@ from typing import Iterable, NamedTuple
 from sqlalchemy import select
 
 from scribe.models import async_session
-from scribe.models.code_shape import REASON_CODES, CodeShape, CodeShapeEvent, CodeShapeUse
+from scribe.models.code_shape import (
+    REASON_CODES, CodeShape, CodeShapeConsumer, CodeShapeEvent, CodeShapeUse,
+)
 from scribe.models.base import iso
 
 logger = logging.getLogger(__name__)
@@ -262,6 +264,96 @@ async def uses_of(shape_ids) -> dict[int, list[CodeShapeUse]]:
     return out
 
 
+# --- the CSS consumer map (milestone 302) ------------------------------------
+
+
+def resolve_consumers(
+    css_rows: Iterable[tuple[int, str, str]],
+    references: dict[str, dict[str, int]],
+) -> dict[tuple[int, str], int]:
+    """{(shape_id, consumer_path): count} — which CSS rows each file's markup
+    consumes. ``css_rows`` are (id, path, symbol) of the repo's live css rows;
+    ``references`` is scan_archive's path → class token → count.
+
+    Resolution (note 2917): a class named in file F resolves to F's OWN row
+    of that name when F defines it (a scoped rule is consumed by its own
+    template); otherwise to every other file's row of that name — a shared
+    sheet, or, when several files define it, all of them: the map says
+    "ambiguous" by fanning out rather than guessing one."""
+    by_symbol: dict[str, list[tuple[int, str]]] = {}
+    for sid, path, symbol in css_rows:
+        by_symbol.setdefault(symbol, []).append((sid, path))
+    out: dict[tuple[int, str], int] = {}
+    for consumer, tokens in references.items():
+        for token, count in tokens.items():
+            rows = by_symbol.get(token)
+            if not rows:
+                continue
+            own = [sid for sid, path in rows if path == consumer]
+            targets = own or [sid for sid, _path in rows]
+            for sid in targets:
+                out[(sid, consumer)] = out.get((sid, consumer), 0) + int(count)
+    return out
+
+
+async def sync_repo_consumers(
+    project_id: int, repo_key: str, references: dict[str, dict[str, int]]
+) -> int:
+    """Rebuild one repo's consumer edges from its archive's class references:
+    insert the new, refresh changed counts, delete what the tree no longer
+    says (a template rewritten, a class renamed, a file gone). Edges hang on
+    live rows only; a vanished row's edges go with this pass. Returns how
+    many edges stand afterwards."""
+    async with async_session() as session:
+        rows = (
+            await session.execute(
+                select(CodeShape.id, CodeShape.path, CodeShape.symbol, CodeShape.vanished_at).where(
+                    CodeShape.project_id == project_id,
+                    CodeShape.repo_key == repo_key,
+                    CodeShape.kind == "css",
+                )
+            )
+        ).all()
+        live = [(r[0], r[1], r[2]) for r in rows if r[3] is None]
+        all_ids = [r[0] for r in rows]
+        wanted = resolve_consumers(live, references)
+        existing = (
+            await session.execute(
+                select(CodeShapeConsumer).where(CodeShapeConsumer.shape_id.in_(all_ids))
+            )
+        ).scalars().all() if all_ids else []
+        have = {(e.shape_id, e.path): e for e in existing}
+        for key, edge in have.items():
+            if key not in wanted:
+                await session.delete(edge)
+            elif edge.count != wanted[key]:
+                edge.count = wanted[key]
+        for (sid, path), count in wanted.items():
+            if (sid, path) not in have:
+                session.add(CodeShapeConsumer(shape_id=sid, path=path, count=count, basis="template"))
+        await session.commit()
+    return len(wanted)
+
+
+async def consumers_of(shape_ids) -> dict[int, list[CodeShapeConsumer]]:
+    """{shape_id: [edges]} for a set of rows — the read side of the map,
+    ordered by path so a readout is stable."""
+    ids = [int(x) for x in shape_ids if x]
+    if not ids:
+        return {}
+    async with async_session() as session:
+        edges = (
+            await session.execute(
+                select(CodeShapeConsumer).where(CodeShapeConsumer.shape_id.in_(ids))
+                .order_by(CodeShapeConsumer.shape_id, CodeShapeConsumer.path)
+            )
+        ).scalars().all()
+    out: dict[int, list[CodeShapeConsumer]] = {}
+    for e in edges:
+        out.setdefault(e.shape_id, []).append(e)
+    return out
+
+
 async def mark_canonicals(
     project_id: int, recorded: list[tuple[int, str, str]]
 ) -> None:

tests/test_integration_shape_classify.py

@@ -683,6 +683,49 @@ async def test_derive_new_names_the_copy_that_joined_a_family_since_the_stamp(se
     assert derive_new_summary(rows, since=None)["count"] == 0
 
 
+@pytest.mark.integration
+async def test_consumer_map_syncs_edges_from_template_references(seeded):
+    """Milestone 302: the consumer edges follow the archive — own-file
+    resolution for a scoped class, fan-out to the shared sheet for a class a
+    template does not define, counts refreshed and stale edges removed on
+    the next sync, and a vanished row's edges gone with it."""
+    from scribe.services.shape_ledger import consumers_of, live_rows, sync_repo_consumers
+
+    pid = seeded["pid"]
+    defs = _defs(
+        ("v/A.vue", "css", "error-msg", ".error-msg {", ".error-msg { color: red }"),
+        ("v/B.vue", "css", "error-msg", ".error-msg {", ".error-msg { color: blue }"),
+        ("assets/components.css", "css", "btn-primary", ".btn-primary {", ".btn-primary { x: 1 }"),
+    )
+    await sync_repo_shapes(pid, REPO, defs, seen_marker="m1")
+    refs = {
+        "v/A.vue": {"error-msg": 2, "btn-primary": 1},
+        "v/B.vue": {"error-msg": 1},
+        "v/C.vue": {"error-msg": 1, "btn-primary": 4},
+    }
+    assert await sync_repo_consumers(pid, REPO, refs) == 5
+    rows = {(r.path, r.symbol): r.id for r in await live_rows(pid) if r.kind == "css"}
+    edges = await consumers_of(rows.values())
+    view = {(p, s): [(e.path, e.count) for e in edges.get(i, [])] for (p, s), i in rows.items()}
+    assert view[("v/A.vue", "error-msg")] == [("v/A.vue", 2)]
+    assert view[("v/B.vue", "error-msg")] == [("v/B.vue", 1), ("v/C.vue", 1)]
+    assert view[("assets/components.css", "btn-primary")] == [("v/A.vue", 1), ("v/C.vue", 4)]
+    assert view[("web/button.css", "btn")] == []            # the seeded row: no template names it
+
+    # The next tree: C stops using error-msg, A uses btn-primary twice now.
+    refs2 = {"v/A.vue": {"error-msg": 2, "btn-primary": 2}, "v/B.vue": {"error-msg": 1}}
+    assert await sync_repo_consumers(pid, REPO, refs2) == 3
+    edges = await consumers_of(rows.values())
+    assert [(e.path, e.count) for e in edges[rows[("v/B.vue", "error-msg")]]] == [("v/B.vue", 1)]
+    assert [(e.path, e.count) for e in edges[rows[("assets/components.css", "btn-primary")]]] == [("v/A.vue", 2)]
+
+    # B's rule vanishes from the tree → its edges go with the pass.
+    await sync_repo_shapes(pid, REPO, [d for d in defs if d[0] != "v/B.vue"], seen_marker="m2")
+    await sync_repo_consumers(pid, REPO, refs2)
+    edges = await consumers_of(rows.values())
+    assert rows[("v/B.vue", "error-msg")] not in edges
+
+
 # --- #2793: the divergence readout against real rows -------------------------
 
 

tests/test_shape_ledger.py

@@ -433,6 +433,44 @@ def test_compact_row_carries_identity_standing_and_the_proposers_word_only():
         assert noisy not in compact
 
 
+def test_resolve_consumers_prefers_the_own_file_and_fans_out_for_shared_names():
+    """Milestone 302: a class named in a template resolves to that file's
+    OWN row when it defines the class (a scoped rule, consumed by its own
+    markup); otherwise to every other definition of the name — one shared
+    sheet, or all of several (the map fans out rather than guessing)."""
+    from scribe.services.shape_ledger import resolve_consumers
+    css_rows = [
+        (1, "v/A.vue", "error-msg"),        # scoped, defined + used in A
+        (2, "v/B.vue", "error-msg"),        # scoped, defined in B, used in B and C
+        (3, "assets/components.css", "btn-primary"),   # the shared sheet
+        (4, "assets/a.css", "pill"), (5, "assets/b.css", "pill"),  # two shared defs
+        (6, "assets/c.css", "unused"),
+    ]
+    refs = {
+        "v/A.vue": {"error-msg": 2, "btn-primary": 1, "nothing-defined": 1},
+        "v/B.vue": {"error-msg": 1},
+        "v/C.vue": {"error-msg": 1, "pill": 3},
+    }
+    assert resolve_consumers(css_rows, refs) == {
+        (1, "v/A.vue"): 2,            # own row, not B's
+        (3, "v/A.vue"): 1,            # the shared sheet
+        (2, "v/B.vue"): 1,            # own row
+        (2, "v/C.vue"): 1,            # C defines nothing → the other file's row
+        (4, "v/C.vue"): 3, (5, "v/C.vue"): 3,   # ambiguous: both, not a guess
+    }
+    # Unknown tokens and an unreferenced row leave no trace.
+    assert all(sid != 6 for sid, _ in resolve_consumers(css_rows, refs))
+
+
+def test_consumer_edges_table_cascades_with_the_shape():
+    from scribe.models import Base
+    from scribe.models.code_shape import CONSUMER_BASES, CodeShapeConsumer
+    assert "code_shape_consumers" in Base.metadata.tables
+    cols = CodeShapeConsumer.__table__.c
+    assert next(iter(cols.shape_id.foreign_keys)).ondelete == "CASCADE"
+    assert CONSUMER_BASES == ("template",)
+
+
 def test_uses_edges_table_and_validation():
     """#2870: consumption is its own relation — a table that cascades with
     both ends, and `uses` on a classification must be a list of ids."""