feat(rules)!: retire rulebook subscriptions and per-project suppressions (#4052)

A rule's home is its scope now: a rule in a rulebook topic is global, a rule on
a project applies to that project, and retrieval reads that directly (#4074).
A subscription had stopped changing anything a session received; a suppression
muted rules from a subscription. Operator, 2026-09-15: "we have global and
project scoped rules, we don't need the subscriptions now."

What goes, whole (rule 22):
- Migration 0101 drops project_rulebook_subscriptions, project_rule_suppressions
  and project_topic_suppressions, and strips subscribe_rulebooks (and 394's
  leftover exclude_always_on_rulebooks) from stored inception choices.
- Service, MCP and REST: subscribe/unsubscribe and the four suppress/unsuppress
  operations. The Subscribers checklist, the subscribe chips, the skip buttons
  and the Suppressed section in the rules UI.
- Inception asks two questions (design system, seed Systems). create_project and
  decide_project_inception lose subscribe_rulebooks.
- Backup v15 stops exporting the three sections; older archives still restore,
  the keys simply unread. Trash no longer hard-deletes suppression rows.

What changes meaning:
- get_applicable_rules is a project's LISTING: its own rules, plus the global
  rules tagged to an area it works in. Untagged global rules apply everywhere
  and arrive by retrieval, so they are not listed. A co_surfaces partner on a
  different project is not dragged in.
- list_rules(project_id) lists that project's own rules.
- rules_payload drops subscribed_rulebooks and suppressed_*; the handshake's
  brief form is project_rules alone.
- using-scribe's "Where a new rule goes" and inception sections, tool
  docstrings and docs say global vs project. Plugin 2026.09.15.1620.

Milestone 414 step 2.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01821k5B3Ysecp9fNYs92Kuy

src/scribe/mcp/tools/milestones.py

@@ -43,7 +43,7 @@ async def get_milestone(milestone_id: int) -> dict:
     rules surface again on recall.
 
     Returns: milestone (incl. body), progress, steps (its tasks ordered by
-    status then update), and applicable_rules / subscribed_rulebooks.
+    status then update), and applicable_rules / project_rules.
     """
     uid = current_user_id()
     milestone = await milestones_svc.get_milestone(uid, milestone_id)

src/scribe/mcp/tools/notes.py

@@ -384,8 +384,8 @@ async def notes_due_for_verification(
             thing there is. 0 = no age filter.
         project_id: narrow to one project. 0 = every project. Unlike the rules
             sweep, this filter is safe: a note belongs to at most one project
-            outright, with none of the subscription paths that would make a
-            project filter UNDER-report a rule.
+            outright, where a project is bound by every GLOBAL rule as well as
+            its own — so a project filter would UNDER-report rules.
         never_only: only notes nobody has ever verified.
     """
     uid = current_user_id()

src/scribe/mcp/tools/projects.py

@@ -66,7 +66,7 @@ async def enter_project(project_id: int) -> dict:
         project_id: The project to enter.
 
     Returns a dict with keys: project, milestone_summary, open_tasks, systems,
-    design_system, project_rules, subscribed_rulebooks, pattern_coverage —
+    design_system, project_rules, pattern_coverage —
     plus milestone_summary_omitted, inception and systems_bootstrap, each
     present only when it applies (see below).
 
@@ -83,11 +83,12 @@ async def enter_project(project_id: int) -> dict:
     with or without a milestone. A work-log counts as touching its task. Each
     names its milestone. list_tasks has the rest.
 
-    `project_rules` lists the project's own rules by id and title, and
-    `subscribed_rulebooks` the rulebooks it draws on. A rule reaches you in
-    full when your work matches it; get_rule(id) reads one, and
-    search(content_type="rule") asks whether one covers what you are about
-    to do.
+    `project_rules` lists the project's own rules by id and title. Global
+    rules (the ones in rulebooks) apply here too and are not listed. Any rule
+    reaches you in full when your work matches it — a global one or one of
+    this project's, never another project's; get_rule(id) reads one, and
+    search(content_type="rule", project_id=...) asks whether one covers what
+    you are about to do.
 
     `pattern_coverage` (usually null) is the shape-accounting line — how many
     of the bound repo's extracted shapes carry a classification against canon
@@ -109,7 +110,7 @@ async def enter_project(project_id: int) -> dict:
 
     `inception` (milestone 297) appears ONLY when the project is yours and
     nobody has decided what it inherits: it carries the current defaults
-    (the rulebooks it could subscribe to, design system, Systems), what to ask the
+    (design system, Systems), what to ask the
     operator — once — and the decide_project_inception call that answers it;
     it repeats on every enter until a decision is recorded.
 
@@ -178,8 +179,7 @@ async def enter_project(project_id: int) -> dict:
         )
 
     # The inception ask (milestone 297): a project nobody has decided on
-    # inherits nothing, silently — no rulebook subscriptions, no design system,
-    # no Systems. Owner-only (deciding is the owner's), and only until a
+    # inherits nothing, silently — no design system, no Systems. Owner-only (deciding is the owner's), and only until a
     # decision is recorded; the key is ABSENT otherwise (#2483).
     inception_ask = None
     if project.user_id == uid and not inception_svc.is_decided(project):
@@ -268,8 +268,9 @@ async def get_project(project_id: int) -> dict:
 
     Returns full project fields, a milestone_summary list (every milestone,
     with description and progress but no plan body; get_milestone reads a
-    plan), and the rulebook-applicable_rules / subscribed_rulebooks pair the
-    assistant should consult when working on this project.
+    plan), the project's own rules (project_rules), and applicable_rules: the
+    global rules tagged to an area this project works in. Every other global
+    rule applies too and arrives by retrieval when the work matches it.
     """
     uid = current_user_id()
     project = await projects_svc.get_project(uid, project_id)
@@ -285,18 +286,14 @@ async def get_project(project_id: int) -> dict:
     return data
 
 
-def _inception_choices(
-    subscribe_rulebooks, design_system_id, seed_systems,
-) -> dict | None:
+def _inception_choices(design_system_id, seed_systems) -> dict | None:
     """The tool args → an inception choices object, or None when no inception
     arg was given at all (a bare create stays undecided and enter_project
     asks). design_system_id: 0 = not stated, -1 = explicitly none, n = that
     system."""
-    if (subscribe_rulebooks is None
-            and not design_system_id and seed_systems is None):
+    if not design_system_id and seed_systems is None:
         return None
     return {
-        "subscribe_rulebooks": list(subscribe_rulebooks or []),
         "design_system_id": None if design_system_id in (0, -1) else design_system_id,
         "seed_systems": bool(seed_systems),
     }
@@ -308,18 +305,18 @@ async def create_project(
     goal: str = "",
     status: str = "active",
     color: str = "",
-    subscribe_rulebooks: list[int] | None = None,
     design_system_id: int = 0,
     seed_systems: bool | None = None,
 ) -> dict:
     """Create a new project in Scribe — and decide what it inherits.
 
     A project's inheritance is a decision, not a default (milestone 297):
-    before calling, ask the operator the four inception questions and pass
-    the answers; a project created without any of them is UNDECIDED and
+    before calling, ask the operator the two inception questions and pass
+    the answers; a project created without either is UNDECIDED and
     enter_project will ask until decide_project_inception records it.
-    Defaults if nobody decides: no rulebook subscriptions, no design system,
-    no Systems.
+    Defaults if nobody decides: no design system, no Systems. Rules are not
+    an inception question: global rules (in rulebooks) apply to every
+    project, and a project's own rules are written with create_project_rule.
 
     Args:
         title: Project name (required).
@@ -327,10 +324,6 @@ async def create_project(
         goal: The desired outcome or definition of done for the project.
         status: one of active (default), paused, completed, archived.
         color: Optional hex colour for the project card (e.g. "#6366f1").
-        subscribe_rulebooks: rulebook ids this project opts into.
-            Subscription is the only way a rulebook binds a project, so a
-            rulebook left out simply does not apply. list_rulebooks shows
-            which exist.
         design_system_id: the design system this project's UI is built from
             (list_design_systems); -1 = explicitly none; 0 = not stated.
         seed_systems: true mints the standard starter Systems (CI & Release,
@@ -346,9 +339,7 @@ async def create_project(
         color=color or None,
     )
     data = project.to_dict()
-    choices = _inception_choices(
-        subscribe_rulebooks, design_system_id, seed_systems,
-    )
+    choices = _inception_choices(design_system_id, seed_systems)
     if choices is not None:
         decided = await inception_svc.decide(uid, project.id, choices=choices, via="mcp")
         data["inception"] = decided["inception"]
@@ -364,7 +355,6 @@ async def create_project(
 
 async def decide_project_inception(
     project_id: int,
-    subscribe_rulebooks: list[int] | None = None,
     design_system_id: int = 0,
     seed_systems: bool | None = None,
 ) -> dict:
@@ -372,22 +362,17 @@ async def decide_project_inception(
     or re-decide later (milestone 297).
 
     Owner-only. Applies the effects through the ordinary tools' paths —
-    subscribe_project_to_rulebook,
-    set_project_design_system, the standard Systems seed — and writes the
+    set_project_design_system and the standard Systems seed — and writes the
     decision on the project last, so get_project/enter_project can say why
-    the project has the rules, design and Systems it has. Re-deciding is
-    additive for subscriptions (use
-    unsubscribe_project_from_rulebook to undo one), replaces the design
-    system, and never re-seeds Systems a project already has.
+    the project has the design and Systems it has. Re-deciding replaces the
+    design system and never re-seeds Systems a project already has.
 
     Args: as create_project's inception args. Passing nothing records a
-    decision to take nothing (no subscriptions, no design system, no seed) —
-    a valid answer, stated.
+    decision to take nothing (no design system, no seed) — a valid answer,
+    stated.
     """
     uid = current_user_id()
-    choices = _inception_choices(
-        subscribe_rulebooks, design_system_id, seed_systems,
-    ) or {}
+    choices = _inception_choices(design_system_id, seed_systems) or {}
     decided = await inception_svc.decide(uid, project_id, choices=choices, via="mcp")
     return {"project_id": project_id, **decided}
 

src/scribe/mcp/tools/rulebooks.py

@@ -1,6 +1,6 @@
 """MCP tools for the Scribe Rulebook system.
 
-Rulebook / topic / rule CRUD, subscription management, and the rule-to-rule
+Rulebook / topic / rule CRUD and the rule-to-rule
 edges. Thin wrappers over services/rulebooks.py — ownership is enforced in the
 service, and the record shape comes from rule_brief / rule_detail there rather
 than being rebuilt here.
@@ -46,16 +46,14 @@ async def get_rulebook(rulebook_id: int) -> dict:
 
 
 async def create_rulebook(title: str, description: str = "") -> dict:
-    """Create a new rulebook (a shared, reusable module of general rules).
+    """Create a new rulebook (a themed grouping of GLOBAL rules).
 
-    A rulebook reaches a project ONE way: the project subscribes to it
-    (subscribe_project_to_rulebook). There was a second until milestone 394 —
-    an `always_on` flag that bound every project automatically — and it is
-    gone with the tier it belonged to. Opt-in is now the whole model, so a
-    rulebook binds what asked for it and nothing else.
-
-    A rulebook is SHARED, so its rules must stay general — agnostic
-    to any single project. Project-specific rules go in create_project_rule.
+    A rule in a rulebook is global: it applies in every project its owner works
+    on, and reaches a session by retrieval when the work makes it relevant
+    (milestone 414). There is no subscribing a project to a rulebook, and no
+    muting one per project — that machinery is gone. So a rulebook's rules must
+    stay general, agnostic to any single project. Project-specific rules go in
+    create_project_rule.
 
     Args:
         title: Rulebook name.
@@ -210,10 +208,12 @@ async def list_rules(
     Args:
         rulebook_id: 0 = no filter; positive = restrict to that rulebook.
         topic_id: 0 = no filter; positive = restrict to that topic.
-        project_id: 0 = no filter; positive = restrict to rules applicable
-            to that project (via its rulebook subscriptions).
+        project_id: 0 = no filter; positive = that project's OWN rules.
+            Global rules apply to every project, so they are listed by
+            rulebook or topic (or unfiltered), not under each project.
 
-    All filters are AND-combined; ownership-scoped.
+    rulebook_id and topic_id AND-combine; project_id lists a project's rules
+    on its own. Ownership-scoped.
     """
     uid = current_user_id()
     rows = await rulebooks_svc.list_rules(
@@ -308,12 +308,12 @@ async def create_rule(
     and let the answer stand; re-raising a declined proposal argues a rule
     into existence, which is the thing this whole loop exists to prevent.
 
-    A rulebook rule is shared by every project subscribed to the rulebook, so
-    it must read as a general standard —
-    never pin it to one project's files, paths, or quirks. For a rule that
-    applies to a single project only, use create_project_rule instead (no
-    rulebook+topic ceremony). If it's a standard a CATEGORY of projects shares,
-    put it in a rulebook for that category and subscribe those projects to it.
+    A rulebook rule is GLOBAL — it applies in every project — so it must read as
+    a general standard: never pin it to one project's files, paths, or quirks.
+    For a rule that applies to a single project only, use create_project_rule
+    instead (no rulebook+topic ceremony). A standard only some projects share
+    is still global in reach; write it so it names the kind of work it is
+    about, and it arrives where that work happens.
 
     Write it general WITHOUT hedging for the exceptions. A project that needs
     to strengthen, narrow or replace this rule writes its own and links it
@@ -334,7 +334,7 @@ async def create_rule(
     own, and fixing that breakage doesn't require the neighbouring clauses, it
     is a separate rule. Rules that FAIL TOGETHER get linked with relate_rules
     (kind="co_surfaces"), never merged into one row: a merged rule cannot be
-    cited, surfaced or suppressed a clause at a time, and it grows without
+    cited or surfaced a clause at a time, and it grows without
     limit because adding to it is always cheaper than adding a rule.
 
     Args:
@@ -420,11 +420,11 @@ async def create_project_rule(
 
     Use this for anything SPECIFIC to one project — its files, paths, layout,
     or quirks. This is the correct home for the project-specific detail that
-    must NOT go into a shared rulebook (where it would leak to every other
-    project that gets the rulebook). General standards belong in a rulebook
-    instead (create_rule). It bypasses the Rulebook -> Topic -> Rule ceremony;
-    the rule is returned in get_project's applicable_rules (under
-    project_rules) and in list_rules(project_id=...).
+    must NOT go into a rulebook (where it would be global, and reach every
+    other project). General standards belong in a rulebook instead
+    (create_rule). It bypasses the Rulebook -> Topic -> Rule ceremony; the
+    rule surfaces by retrieval in this project's sessions only, and is listed
+    in get_project's project_rules and in list_rules(project_id=...).
 
     PROPOSE, THEN WRITE ON A YES — create_rule's opening carries the whole
     loop: the four things a proposal states (what it would require, its
@@ -882,94 +882,6 @@ async def delete_rule(rule_id: int, confirmed: bool = False) -> dict:
                        f"Restore with restore('{batch}')."}
 
 
-# ── Subscriptions ──────────────────────────────────────────────────────
-
-async def subscribe_project_to_rulebook(
-    project_id: int, rulebook_id: int,
-) -> dict:
-    """Subscribe a project to a rulebook — its rules then bind that project.
-
-    Subscription is the ONLY path for a rulebook (milestone 394): a reusable,
-    themed module of GENERAL rules shared across the projects that subscribe.
-    Subscribe a project because it fits the rulebook's theme (e.g. a visual app
-    -> the design-system rulebook), not to host rules about this one project —
-    those belong in create_project_rule.
-    """
-    uid = current_user_id()
-    await rulebooks_svc.subscribe_project(
-        project_id=project_id, rulebook_id=rulebook_id, user_id=uid,
-    )
-    return {"project_id": project_id, "rulebook_id": rulebook_id, "subscribed": True}
-
-
-async def unsubscribe_project_from_rulebook(
-    project_id: int, rulebook_id: int,
-) -> dict:
-    """Remove a project's subscription to a rulebook."""
-    uid = current_user_id()
-    await rulebooks_svc.unsubscribe_project(
-        project_id=project_id, rulebook_id=rulebook_id, user_id=uid,
-    )
-    return {"project_id": project_id, "rulebook_id": rulebook_id, "subscribed": False}
-
-
-# ── Suppressions — project-level mute of rulebook rules / topics ────────
-
-
-async def suppress_rule_for_project(
-    project_id: int, rule_id: int,
-) -> dict:
-    """Mute a single rulebook rule for one project.
-
-    The rule stays in its rulebook for other projects; only this project
-    skips it. Idempotent. Use unsuppress_rule_for_project to re-enable.
-    Project-scoped rules (create_project_rule) are NOT suppressible — delete
-    them with delete_rule instead.
-    """
-    uid = current_user_id()
-    await rulebooks_svc.suppress_rule_for_project(
-        project_id=project_id, rule_id=rule_id, user_id=uid,
-    )
-    return {"project_id": project_id, "rule_id": rule_id, "suppressed": True}
-
-
-async def unsuppress_rule_for_project(
-    project_id: int, rule_id: int,
-) -> dict:
-    """Re-enable a previously-suppressed rule for one project. Idempotent."""
-    uid = current_user_id()
-    await rulebooks_svc.unsuppress_rule_for_project(
-        project_id=project_id, rule_id=rule_id, user_id=uid,
-    )
-    return {"project_id": project_id, "rule_id": rule_id, "suppressed": False}
-
-
-async def suppress_topic_for_project(
-    project_id: int, topic_id: int,
-) -> dict:
-    """Mute every rule under a topic for one project.
-
-    Equivalent to suppressing each rule in the topic individually, but
-    auto-includes new rules added to the topic later. Idempotent.
-    """
-    uid = current_user_id()
-    await rulebooks_svc.suppress_topic_for_project(
-        project_id=project_id, topic_id=topic_id, user_id=uid,
-    )
-    return {"project_id": project_id, "topic_id": topic_id, "suppressed": True}
-
-
-async def unsuppress_topic_for_project(
-    project_id: int, topic_id: int,
-) -> dict:
-    """Re-enable a previously-suppressed topic for one project. Idempotent."""
-    uid = current_user_id()
-    await rulebooks_svc.unsuppress_topic_for_project(
-        project_id=project_id, topic_id=topic_id, user_id=uid,
-    )
-    return {"project_id": project_id, "topic_id": topic_id, "suppressed": False}
-
-
 async def relate_rules(
     from_rule_id: int, to_rule_id: int, kind: str, note: str = "",
 ) -> dict:
@@ -981,7 +893,7 @@ async def relate_rules(
       together. Use it when you are tempted to fold one rule into another
       because "either could surface without the other": that instinct is
       right and merging is the wrong fix, because a merged rule cannot be
-      cited, suppressed or surfaced a clause at a time. Symmetric — draw it
+      cited or surfaced a clause at a time. Symmetric — draw it
       once, it reads from both ends.
     - kind="overrides" — this rule supersedes that one for its scope. Use it
       when a project rule is stricter than, or replaces, an inherited one,
@@ -1046,10 +958,10 @@ async def rules_due_for_verification(
             Never-checked rules always qualify. 0 = no age filter.
         never_only: only rules nobody has ever verified.
 
-    NOT filterable by project, deliberately: a project reaches rules through
-    project scope and rulebook subscriptions, and a filter that missed one of
-    those paths would UNDER-report — which is the
-    exact failure this whole surface exists to prevent. Read the whole list.
+    NOT filterable by project, deliberately: a project is bound by its own
+    rules AND every global rule, and a filter that dropped the global ones
+    would UNDER-report — which is the exact failure this whole surface exists
+    to prevent. Read the whole list.
     """
     uid = current_user_id()
     rules = await rulebooks_svc.rules_due_for_verification(
@@ -1110,9 +1022,6 @@ def register(mcp) -> None:
         create_rule, create_project_rule, update_rule, delete_rule,
         create_preference, update_preference,
         relate_rules, unrelate_rules,
-        subscribe_project_to_rulebook, unsubscribe_project_from_rulebook,
-        suppress_rule_for_project, unsuppress_rule_for_project,
-        suppress_topic_for_project, unsuppress_topic_for_project,
         rules_due_for_verification, mark_rule_verified,
         rule_history,
     ):

src/scribe/mcp/tools/tasks.py

@@ -81,9 +81,8 @@ async def get_task(task_id: int) -> dict:
     (the areas this task is filed under; read a subsystem's whole pile with
     list_system_records) or, for an untagged project task, the `systems_hint`
     question. For legacy
-    kind=plan tasks, the response also includes applicable_rules +
-    subscribed_rulebooks from the task's project's rulebook subscriptions (new
-    plans are milestones — use get_milestone for those).
+    kind=plan tasks, the response also includes the project's applicable_rules
+    and project_rules (new plans are milestones — use get_milestone for those).
 
     A task another user shared with you also carries `shared`, `owner` and
     `permission` — it's their work item, not one you took on.

src/scribe/models/__init__.py

@@ -44,8 +44,7 @@ from scribe.models.user_profile import UserProfile  # noqa: E402, F401
 # Imported before rulebook: rule_systems foreign-keys canonical_systems.
 from scribe.models.canonical_system import CanonicalSystem  # noqa: E402, F401
 from scribe.models.rulebook import (  # noqa: E402, F401
-    Rulebook, RulebookTopic, Rule, RuleRelation, project_rulebook_subscriptions,
-    rule_systems,
+    Rulebook, RulebookTopic, Rule, RuleRelation, rule_systems,
 )
 from scribe.models.repo_binding import RepoBinding  # noqa: E402, F401
 from scribe.models.forge_connection import ForgeConnection  # noqa: E402, F401

src/scribe/models/project.py

@@ -39,11 +39,10 @@ class Project(Base, TimestampMixin, SoftDeleteMixin):
     )
     # The inception record (milestone 297): what this project was decided to
     # inherit, when, and through which door — {decided_at, decided_by, via,
-    # choices: {subscribe_rulebooks,
-    # design_system_id, seed_systems}}. NULL means nobody has decided yet,
-    # and enter_project asks; the effects themselves live in the subscription
-    # / exclusion tables, design_system_id and the project's Systems — this is
-    # the WHY, kept so later surfaces can say it. See services/inception.py.
+    # choices: {design_system_id, seed_systems}}. NULL means nobody has
+    # decided yet, and enter_project asks; the effects themselves live in
+    # design_system_id and the project's Systems — this is the WHY, kept so
+    # later surfaces can say it. See services/inception.py.
     inception: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
 
     def to_dict(self) -> dict:

src/scribe/models/rulebook.py

@@ -236,36 +236,10 @@ class RuleRelation(Base, CreatedAtMixin):
         }
 
 
-# Pure many-to-many — no model class, just the join table.
-project_rulebook_subscriptions = Table(
-    "project_rulebook_subscriptions",
-    Base.metadata,
-    Column("project_id", BigInteger, ForeignKey("projects.id", ondelete="CASCADE"), primary_key=True),
-    Column("rulebook_id", BigInteger, ForeignKey("rulebooks.id", ondelete="CASCADE"), primary_key=True),
-    Column("created_at", DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)),
-)
-
-# Suppressions — let a project mute individual rules or whole topics from
-# rulebooks it subscribes to, without unsubscribing the rulebook itself.
-# FKs CASCADE so the row vanishes when its parent is removed.
-project_rule_suppressions = Table(
-    "project_rule_suppressions",
-    Base.metadata,
-    Column("project_id", BigInteger, ForeignKey("projects.id", ondelete="CASCADE"), primary_key=True),
-    Column("rule_id", BigInteger, ForeignKey("rules.id", ondelete="CASCADE"), primary_key=True),
-    Column("created_at", DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)),
-)
-
-# `project_rulebook_exclusions` lived here until milestone 394. It recorded a
-# project's opt-out of a whole always-on rulebook — which only made sense
-# while a rulebook could bind a project WITHOUT being asked. Subscription is
-# now the only reach a rulebook has, so declining one is expressed by not
-# subscribing, and there is nothing left to opt out of.
-
-project_topic_suppressions = Table(
-    "project_topic_suppressions",
-    Base.metadata,
-    Column("project_id", BigInteger, ForeignKey("projects.id", ondelete="CASCADE"), primary_key=True),
-    Column("topic_id", BigInteger, ForeignKey("rulebook_topics.id", ondelete="CASCADE"), primary_key=True),
-    Column("created_at", DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)),
-)
+# `project_rulebook_subscriptions`, `project_rule_suppressions` and
+# `project_topic_suppressions` lived here until milestone 414 (migration 0101).
+# A rule's home is its scope now: a rule in a rulebook topic is global, a rule
+# on a project applies to that project, and retrieval reads that directly. A
+# subscription had stopped changing anything a session received, and a
+# suppression muted rules from a subscription. A project that departs from a
+# global rule writes a project rule with an `overrides` relation instead.

src/scribe/routes/projects.py

@@ -99,8 +99,7 @@ async def create_project_route():
 @login_required
 async def decide_inception_route(project_id: int):
     """Record (or re-record) what a project inherits — milestone 297.
-    Body: the choices object {subscribe_rulebooks,
-    design_system_id, seed_systems}; owner-only."""
+    Body: the choices object {design_system_id, seed_systems}; owner-only."""
     uid = get_current_user_id()
     data = await request.get_json() or {}
     choices = data.get("choices", data)

src/scribe/routes/rulebooks.py

@@ -305,37 +305,7 @@ async def delete_rule(rule_id: int):
     return "", 204
 
 
-# ── Subscriptions ──────────────────────────────────────────────────────
-
-@rulebooks_bp.post("/projects/<int:project_id>/rulebook-subscriptions")
-@login_required
-async def subscribe_project(project_id: int):
-    data = await request.get_json() or {}
-    rulebook_id = data.get("rulebook_id")
-    if not rulebook_id:
-        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=get_current_user_id(),
-        )
-    except ValueError as exc:
-        return jsonify({"error": str(exc)}), 404
-    return "", 204
-
-
-@rulebooks_bp.delete(
-    "/projects/<int:project_id>/rulebook-subscriptions/<int:rulebook_id>"
-)
-@login_required
-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=get_current_user_id(),
-        )
-    except ValueError as exc:
-        return jsonify({"error": str(exc)}), 404
-    return "", 204
-
+# ── A project's rule listing ───────────────────────────────────────────
 
 @rulebooks_bp.get("/projects/<int:project_id>/rules")
 @login_required
@@ -346,54 +316,6 @@ async def get_project_rules(project_id: int):
     return jsonify(result)
 
 
-@rulebooks_bp.post("/projects/<int:project_id>/suppressions/rules/<int:rule_id>")
-@login_required
-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=get_current_user_id(),
-        )
-    except ValueError as exc:
-        return jsonify({"error": str(exc)}), 404
-    return "", 204
-
-
-@rulebooks_bp.delete("/projects/<int:project_id>/suppressions/rules/<int:rule_id>")
-@login_required
-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=get_current_user_id(),
-        )
-    except ValueError as exc:
-        return jsonify({"error": str(exc)}), 404
-    return "", 204
-
-
-@rulebooks_bp.post("/projects/<int:project_id>/suppressions/topics/<int:topic_id>")
-@login_required
-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=get_current_user_id(),
-        )
-    except ValueError as exc:
-        return jsonify({"error": str(exc)}), 404
-    return "", 204
-
-
-@rulebooks_bp.delete("/projects/<int:project_id>/suppressions/topics/<int:topic_id>")
-@login_required
-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=get_current_user_id(),
-        )
-    except ValueError as exc:
-        return jsonify({"error": str(exc)}), 404
-    return "", 204
-
-
 @rulebooks_bp.post("/projects/<int:project_id>/rules")
 @login_required
 async def create_project_rule(project_id: int):

src/scribe/services/backup.py

@@ -22,9 +22,6 @@ from scribe.models.rulebook import (
     Rule,
     Rulebook,
     RulebookTopic,
-    project_rule_suppressions,
-    project_rulebook_subscriptions,
-    project_topic_suppressions,
 )
 from scribe.models.setting import Setting
 from scribe.models.system import RecordSystem, System
@@ -66,8 +63,12 @@ logger = logging.getLogger(__name__)
 # (milestone 333). Carrying it is the WHOLE REASON the table is separate: the
 # note importer maps note_id through note_id_map, so a rule id parked there
 # would restore attached to whatever note took that number.
+# v15 (2026-09) dropped rulebook_subscriptions / rule_suppressions /
+# topic_suppressions with their tables (milestone 414): a rule's scope is its
+# home now. Older archives carrying those sections still restore — the keys are
+# simply not read — as do the subscribe_rulebooks inception choices they hold.
 # Bump when the serialized schema changes.
-BACKUP_VERSION = 14
+BACKUP_VERSION = 15
 
 # 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
@@ -80,8 +81,6 @@ BACKUP_VERSION = 14
 _BACKED_UP = [
     "users", "projects", "milestones", "notes", "task_logs", "note_drafts",
     "note_versions", "settings", "rulebooks", "rulebook_topics", "rules",
-    "project_rulebook_subscriptions", "project_rule_suppressions",
-    "project_topic_suppressions",
     # 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",
@@ -234,18 +233,6 @@ def _d(val: str | None) -> date | None:
     return date.fromisoformat(val) if val else None
 
 
-def _subscription_rows(rows) -> list[dict]:
-    return [{"project_id": r.project_id, "rulebook_id": r.rulebook_id} for r in rows]
-
-
-def _rule_suppression_rows(rows) -> list[dict]:
-    return [{"project_id": r.project_id, "rule_id": r.rule_id} for r in rows]
-
-
-def _topic_suppression_rows(rows) -> list[dict]:
-    return [{"project_id": r.project_id, "topic_id": r.topic_id} for r in rows]
-
-
 
 
 # The v5 sections. Pure row-builders like the join-table helpers above, for the
@@ -640,15 +627,6 @@ async def export_full_backup() -> dict:
         rulebooks = (await session.execute(select(Rulebook))).scalars().all()
         topics = (await session.execute(select(RulebookTopic))).scalars().all()
         rules = (await session.execute(select(Rule))).scalars().all()
-        subscriptions = (await session.execute(
-            select(project_rulebook_subscriptions)
-        )).all()
-        rule_suppressions = (await session.execute(
-            select(project_rule_suppressions)
-        )).all()
-        topic_suppressions = (await session.execute(
-            select(project_topic_suppressions)
-        )).all()
 
     return {
         "version": BACKUP_VERSION,
@@ -671,9 +649,6 @@ async def export_full_backup() -> dict:
         "rulebooks": _rulebook_rows(rulebooks),
         "rulebook_topics": _topic_rows(topics),
         "rules": _rule_rows(rules),
-        "rulebook_subscriptions": _subscription_rows(subscriptions),
-        "rule_suppressions": _rule_suppression_rows(rule_suppressions),
-        "topic_suppressions": _topic_suppression_rows(topic_suppressions),
         "canonical_systems": _canonical_system_rows(canonical_systems),
         "rule_systems": _rule_system_rows(rule_system_rows),
         "rule_relations": _rule_relation_rows(rule_relations),
@@ -825,24 +800,6 @@ async def export_user_backup(user_id: int) -> dict:
                 RuleRelation.to_rule_id.in_(_rule_ids),
             )
         )).scalars().all() if _rule_ids else []
-        if project_ids:
-            subscriptions = (await session.execute(
-                select(project_rulebook_subscriptions).where(
-                    project_rulebook_subscriptions.c.project_id.in_(project_ids)
-                )
-            )).all()
-            rule_suppressions = (await session.execute(
-                select(project_rule_suppressions).where(
-                    project_rule_suppressions.c.project_id.in_(project_ids)
-                )
-            )).all()
-            topic_suppressions = (await session.execute(
-                select(project_topic_suppressions).where(
-                    project_topic_suppressions.c.project_id.in_(project_ids)
-                )
-            )).all()
-        else:
-            subscriptions = rule_suppressions = topic_suppressions = []
 
     return {
         "version": BACKUP_VERSION,
@@ -867,9 +824,6 @@ async def export_user_backup(user_id: int) -> dict:
         "rulebooks": _rulebook_rows(rulebooks),
         "rulebook_topics": _topic_rows(topics),
         "rules": _rule_rows(rules),
-        "rulebook_subscriptions": _subscription_rows(subscriptions),
-        "rule_suppressions": _rule_suppression_rows(rule_suppressions),
-        "topic_suppressions": _topic_suppression_rows(topic_suppressions),
         "canonical_systems": _canonical_system_rows(canonical_systems),
         "rule_systems": _rule_system_rows(rule_system_rows),
         "rule_relations": _rule_relation_rows(rule_relations),
@@ -1014,8 +968,6 @@ async def _restore_v2(data: dict) -> dict:
         "users": 0, "projects": 0, "milestones": 0, "notes": 0,
         "task_logs": 0, "note_drafts": 0, "note_versions": 0,
         "settings": 0, "rulebooks": 0, "rulebook_topics": 0, "rules": 0,
-        "rulebook_subscriptions": 0, "rule_suppressions": 0,
-        "topic_suppressions": 0,
         "systems": 0, "record_systems": 0, "design_systems": 0,
         "design_tokens": 0, "note_usage_events": 0, "rule_usage_events": 0,
         "repo_bindings": 0,
@@ -1300,38 +1252,10 @@ async def _restore_v2(data: dict) -> dict:
             rule_id_map[r_data["id"]] = rule.id
             stats["rules"] += 1
 
-        # 12. Rulebook subscriptions (v3 join table)
-        for sub in data.get("rulebook_subscriptions", []):
-            mapped_pid = project_id_map.get(sub.get("project_id", 0))
-            mapped_rbid = rulebook_id_map.get(sub.get("rulebook_id", 0))
-            if mapped_pid is None or mapped_rbid is None:
-                continue
-            await session.execute(project_rulebook_subscriptions.insert().values(
-                project_id=mapped_pid, rulebook_id=mapped_rbid,
-            ))
-            stats["rulebook_subscriptions"] += 1
-
-        # 13. Rule suppressions (v3 join table)
-        for sup in data.get("rule_suppressions", []):
-            mapped_pid = project_id_map.get(sup.get("project_id", 0))
-            mapped_rid = rule_id_map.get(sup.get("rule_id", 0))
-            if mapped_pid is None or mapped_rid is None:
-                continue
-            await session.execute(project_rule_suppressions.insert().values(
-                project_id=mapped_pid, rule_id=mapped_rid,
-            ))
-            stats["rule_suppressions"] += 1
-
-        # 14. Topic suppressions (v3 join table)
-        for sup in data.get("topic_suppressions", []):
-            mapped_pid = project_id_map.get(sup.get("project_id", 0))
-            mapped_tid = topic_id_map.get(sup.get("topic_id", 0))
-            if mapped_pid is None or mapped_tid is None:
-                continue
-            await session.execute(project_topic_suppressions.insert().values(
-                project_id=mapped_pid, topic_id=mapped_tid,
-            ))
-            stats["topic_suppressions"] += 1
+        # 12-14. Rulebook subscriptions, rule and topic suppressions (v3-v14)
+        # `rulebook_subscriptions`, `rule_suppressions` and `topic_suppressions`
+        # are READ BY NOBODY since milestone 414 dropped their tables. An
+        # archive carrying them still imports, for the reason 14b gives.
 
         # 14b. Always-on rulebook exclusions (v10, milestone 297)
         # `rulebook_exclusions` was a v10 section and is READ BY NOBODY since
@@ -1669,10 +1593,8 @@ async def _restore_v2(data: dict) -> dict:
                 # so the next edit to that project would fail on data this
                 # importer wrote.
                 choices.pop("exclude_always_on_rulebooks", None)
-                choices["subscribe_rulebooks"] = [
-                    rulebook_id_map[i] for i in choices.get("subscribe_rulebooks") or []
-                    if i in rulebook_id_map
-                ]
+                # Same for subscribe_rulebooks since milestone 414.
+                choices.pop("subscribe_rulebooks", None)
                 ds = choices.get("design_system_id")
                 choices["design_system_id"] = design_system_id_map.get(ds) if ds else None
                 proj.inception = {**inception, "choices": choices}

src/scribe/services/inception.py

@@ -7,7 +7,6 @@ A project's inheritance is a decision, not a default. The record lives on
       "decided_at": "<iso>", "decided_by": <user id> | null,
       "via": "mcp" | "ui" | "legacy",
       "choices": {
-        "subscribe_rulebooks": [rulebook ids],
         "design_system_id": <id> | null,
         "seed_systems": bool
       }
@@ -17,14 +16,15 @@ NULL = undecided → enter_project asks. ``legacy`` is the migration's stamp on
 projects that existed before the step did (inherit-all / no design system /
 no seed), so the ask fires only for projects created after this shipped.
 
-``exclude_always_on_rulebooks`` was a fourth choice until milestone 394. It
-let a project decline to inherit an always-on rulebook, and with no always-on
-tier there is nothing to decline — a rulebook now reaches a project by
-subscription, which is opt-IN, so declining is expressed by not subscribing.
+Rules are not a choice any more. ``exclude_always_on_rulebooks`` went with the
+always-on tier (milestone 394), and ``subscribe_rulebooks`` went with
+subscriptions (milestone 414): a rule in a rulebook is global and applies to
+every project, and a project's own rules are written on it directly. Migration
+0101 strips both keys from stored records.
 
 The shape and its validator are pure; ``decide`` composes the existing
-services — subscriptions, set_project_design_system, the standard Systems
-seed — checks every target BEFORE touching anything,
+services — set_project_design_system and the standard Systems seed — checks
+every target BEFORE touching anything,
 applies the effects (each idempotent), and writes the record LAST, so a
 half-applied decision is re-runnable rather than recorded as done.
 ``current_defaults`` is what the enter_project ask shows: what binds today
@@ -34,20 +34,11 @@ from __future__ import annotations
 
 from datetime import datetime, timezone
 
-from sqlalchemy import select
-
 from scribe.models import async_session
 from scribe.models.project import Project
-from scribe.models.rulebook import Rulebook
 
 INCEPTION_VIAS = ("mcp", "ui", "legacy")
-CHOICE_KEYS = ("subscribe_rulebooks", "design_system_id", "seed_systems")
-
-
-def _is_id_list(value) -> bool:
-    return isinstance(value, list) and all(
-        isinstance(v, int) and not isinstance(v, bool) and v > 0 for v in value
-    )
+CHOICE_KEYS = ("design_system_id", "seed_systems")
 
 
 def validate_inception(choices) -> str | None:
@@ -55,18 +46,14 @@ def validate_inception(choices) -> str | None:
     None. Pure and checked BEFORE any effect is applied: a decision either
     applies whole or errors whole (the StrictArgs lesson, #2709).
 
-    Accepts the four keys, each optional: two id lists (positive ints, no
-    duplicates between exclude and subscribe), ``design_system_id`` an int
-    or None, ``seed_systems`` a bool. Unknown keys are an error — a typo
-    must not become a silently ignored choice."""
+    Accepts two keys, each optional: ``design_system_id`` an int or None,
+    ``seed_systems`` a bool. Unknown keys are an error — a typo, or a choice
+    the product no longer offers, must not become a silently ignored one."""
     if not isinstance(choices, dict):
         return "choices must be an object"
     unknown = sorted(set(choices) - set(CHOICE_KEYS))
     if unknown:
         return f"unknown inception choice(s): {', '.join(unknown)} (one of: {', '.join(CHOICE_KEYS)})"
-    subs = choices.get("subscribe_rulebooks") or []
-    if not _is_id_list(subs):
-        return "subscribe_rulebooks must be a list of rulebook ids"
     ds = choices.get("design_system_id")
     if ds is not None and (isinstance(ds, bool) or not isinstance(ds, int) or ds <= 0):
         return "design_system_id must be a positive id or null"
@@ -77,11 +64,10 @@ def validate_inception(choices) -> str | None:
 
 
 def normalize_choices(choices: dict | None) -> dict:
-    """The three keys, always present, in canonical form — what gets stored
+    """Both keys, always present, in canonical form — what gets stored
     and what the UI/agent reads back. Call after validate_inception."""
     choices = choices or {}
     return {
-        "subscribe_rulebooks": sorted(set(choices.get("subscribe_rulebooks") or [])),
         "design_system_id": choices.get("design_system_id"),
         "seed_systems": bool(choices.get("seed_systems", False)),
     }
@@ -95,37 +81,20 @@ def is_decided(project) -> bool:
 async def current_defaults(user_id: int, project_id: int) -> dict:
     """What the project inherits if nobody decides — the ask's payload.
 
-    {rulebooks: [{id,title}], subscribed_rulebooks: [...],
-     design_system_id, design_systems: [{id,title}], systems: <count>}.
-    Instance-agnostic: an install with no rulebooks / design systems shows
-    empty lists, and the ask says so rather than inventing a default.
+    {design_system_id, design_systems: [{id,title}], systems: <count>}.
+    Instance-agnostic: an install with no design systems shows an empty list,
+    and the ask says so rather than inventing a default.
     """
     from scribe.services import design_systems as design_systems_svc
     from scribe.services import projects as projects_svc
-    from scribe.services import rulebooks as rulebooks_svc
     from scribe.services import systems as systems_svc
 
     project = await projects_svc.get_project(user_id, project_id)
     if project is None:
         raise ValueError(f"project {project_id} not found")
-    async with async_session() as session:
-        rows = (
-            await session.execute(
-                select(Rulebook.id, Rulebook.title)
-                .where(Rulebook.owner_user_id == user_id, Rulebook.deleted_at.is_(None))
-                .order_by(Rulebook.title)
-            )
-        ).all()
-    applicable = await rulebooks_svc.get_applicable_rules(project_id, user_id, limit=1)
     designs = await design_systems_svc.list_design_systems(user_id)
     systems = await systems_svc.list_systems(user_id, project_id, include_archived=True)
     return {
-        # ONE list since milestone 394. This was split into always-on and
-        # "other" because the first bound the project whether it asked or not;
-        # with the tier gone every rulebook is opt-in, so the split named a
-        # difference that no longer exists.
-        "rulebooks": [{"id": i, "title": t} for i, t in rows],
-        "subscribed_rulebooks": applicable.get("subscribed_rulebooks", []),
         "design_system_id": project.design_system_id,
         "design_systems": [{"id": d.id, "title": d.title} for d in designs],
         "systems": len(systems),
@@ -137,22 +106,6 @@ async def _check_targets(user_id: int, choices: dict) -> None:
     effect lands — a decision applies whole or errors whole."""
     from scribe.services import access
 
-    wanted = set(choices["subscribe_rulebooks"])
-    if wanted:
-        async with async_session() as session:
-            rows = (
-                await session.execute(
-                    select(Rulebook.id).where(
-                        Rulebook.id.in_(wanted),
-                        Rulebook.owner_user_id == user_id,
-                        Rulebook.deleted_at.is_(None),
-                    )
-                )
-            ).all()
-        found = {rid for (rid,) in rows}
-        missing = sorted(wanted - found)
-        if missing:
-            raise ValueError(f"rulebook(s) {missing} not found (or not yours)")
     ds = choices["design_system_id"]
     if ds is not None and not await access.can_read_design_system(user_id, ds):
         raise ValueError(f"design system {ds} not found (or not readable)")
@@ -167,20 +120,17 @@ async def decide(
 ) -> dict:
     """Record a project's inception decision and apply it (milestone 297).
 
-    Owner-only. Validates the choices (pure) and every target (owned /
-    readable) first; then, each idempotent: subscribe the named rulebooks,
-    point the project at the design system (None = explicitly none), seed the
-    standard Systems if asked and the project has none; then write
-    ``projects.inception`` LAST. Re-deciding is additive for subscriptions
-    (nothing is silently dropped — unsubscribe is an explicit call), replaces
-    the design system, and re-seeds nothing a project already has.
+    Owner-only. Validates the choices (pure) and every target (readable)
+    first; then, each idempotent: point the project at the design system
+    (None = explicitly none), seed the standard Systems if asked and the
+    project has none; then write ``projects.inception`` LAST. Re-deciding
+    replaces the design system and re-seeds nothing a project already has.
 
-    Returns {"inception": <record>, "effects": {excluded, subscribed,
-    design_system_id, systems_seeded}}.
+    Returns {"inception": <record>, "effects": {design_system_id,
+    systems_seeded}}.
     """
     from scribe.services import design_systems as design_systems_svc
     from scribe.services import projects as projects_svc
-    from scribe.services import rulebooks as rulebooks_svc
     from scribe.services import systems as systems_svc
 
     if via not in INCEPTION_VIAS or via == "legacy":
@@ -194,8 +144,6 @@ async def decide(
         raise ValueError(f"project {project_id} not found (or not yours)")
     await _check_targets(user_id, choices)
 
-    for rb in choices["subscribe_rulebooks"]:
-        await rulebooks_svc.subscribe_project(project_id, rb, user_id)
     if not await design_systems_svc.set_project_design_system(
         user_id, project_id, choices["design_system_id"]
     ):
@@ -219,7 +167,6 @@ async def decide(
     return {
         "inception": record,
         "effects": {
-            "subscribed": choices["subscribe_rulebooks"],
             "design_system_id": choices["design_system_id"],
             "systems_seeded": [sy.name for sy in seeded],
         },
@@ -235,24 +182,20 @@ async def inception_ask(user_id: int, project_id: int) -> dict:
         defaults = await current_defaults(user_id, project_id)
     except Exception:
         return {}
-    books = ", ".join(f"{r['title']} (#{r['id']})" for r in defaults["rulebooks"]) or "none"
     designs = ", ".join(f"{d['title']} (#{d['id']})" for d in defaults["design_systems"]) or "none"
     return {
         "defaults": defaults,
         "ask": (
             "This project has no inception decision: nobody has said what it "
-            f"inherits. Rulebooks it could subscribe to — {books}; design system — "
+            "inherits. Design system — "
             f"{'#' + str(defaults['design_system_id']) if defaults['design_system_id'] else 'none'} "
             f"(available: {designs}); Systems — {defaults['systems']}. Ask the operator, "
-            "once: which rulebooks to subscribe (default: none — a rulebook binds "
-            "a project only when it opts in), which design system (or none), and "
-            "whether to seed "
+            "once: which design system (or none), and whether to seed "
             "the standard starter Systems — then record the answers. This ask repeats on "
             "every enter_project until a decision is recorded."
         ),
         "call": (
             f"decide_project_inception(project_id={project_id}, "
-            "subscribe_rulebooks=[...], "
             "design_system_id=<id | -1 for none>, seed_systems=<true|false>)"
         ),
     }

src/scribe/services/planning.py

@@ -48,8 +48,8 @@ async def start_planning(
         {
           "milestone": <milestone dict>,
           "applicable_rules": [...],
-          "subscribed_rulebooks": [...],
           "applicable_rules_truncated": bool,
+          "project_rules": [...],
           "project_goal": str,
           "open_task_count": int,
           "steps": [<task dict>, ...],   # only when steps were given

src/scribe/services/rulebooks.py

@@ -91,7 +91,7 @@ async def update_rulebook(
 
 
 async def delete_rulebook(rulebook_id: int, user_id: int) -> None:
-    """Delete a rulebook. Cascade-deletes topics, rules, subscriptions."""
+    """Delete a rulebook. Cascade-deletes its topics and rules."""
     async with async_session() as session:
         result = await session.execute(
             select(Rulebook).where(
@@ -265,30 +265,6 @@ async def _assert_project_owned(session, project_id: int, user_id: int) -> None:
         raise ValueError(f"project {project_id} not found")
 
 
-async def _assert_rulebook_rule_owned(session, rule_id: int, user_id: int) -> None:
-    """Raise ValueError if rule isn't a rulebook rule the user owns.
-
-    Project-scoped rules (Rule.project_id set, topic_id NULL) are NOT
-    suppressible — they belong to the project; delete them instead. This
-    helper deliberately excludes them.
-    """
-    from scribe.models.rulebook import Rule
-    result = await session.execute(
-        select(Rule)
-        .join(RulebookTopic, Rule.topic_id == RulebookTopic.id)
-        .join(Rulebook, RulebookTopic.rulebook_id == Rulebook.id)
-        .where(
-            Rule.id == rule_id,
-            Rulebook.owner_user_id == user_id,
-            Rule.deleted_at.is_(None),
-            RulebookTopic.deleted_at.is_(None),
-            Rulebook.deleted_at.is_(None),
-        )
-    )
-    if result.scalar_one_or_none() is None:
-        raise ValueError(f"rule {rule_id} not found or not a rulebook rule")
-
-
 # The vocabularies migration 0088's CHECK constraints enforce. Named here so
 # a caller can be corrected before the database refuses it (rule 36 keeps the
 # two in step; this keeps the error readable).
@@ -414,9 +390,7 @@ def _refresh_rule_embedding(rule: Rule) -> None:
         logger.exception("embedding refresh failed for rule %s", rule.id)
 
 
-async def co_surfaced_partners(
-    user_id: int, rule_ids: list[int], exclude_ids: set[int] | None = None,
-) -> list[Rule]:
+async def co_surfaced_partners(user_id: int, rule_ids: list[int]) -> list[Rule]:
     """Rules that must arrive WITH the given ones, because they fail together.
 
     This is the whole reason `co_surfaces` exists. Rule 144 was split off rule
@@ -425,18 +399,14 @@ async def co_surfaced_partners(
     what the entire shape is intended to be." Merging was the only fix
     available; this is the fix that should have been available.
 
-    Two limits, both deliberate:
-
-    - Only rules the caller OWNS. An edge is not a back door into someone
-      else's rulebook.
-    - `exclude_ids` is honoured, and callers pass the project's SUPPRESSIONS.
-      A project that explicitly muted a rule should not have it dragged back in
-      by an edge — the suppression is a decision, and the edge does not
-      outrank it.
+    Only rules the caller OWNS: an edge is not a back door into someone else's
+    rulebook. Whether a partner can reach a given PROJECT is the caller's
+    question (get_applicable_rules drops another project's rule), because this
+    answers "what fails with these", which has no project in it.
     """
     if not rule_ids:
         return []
-    known = set(rule_ids) | (exclude_ids or set())
+    known = set(rule_ids)
     async with async_session() as session:
         edges = (await session.execute(
             select(RuleRelation).where(
@@ -523,9 +493,10 @@ async def create_project_rule(
 ) -> Rule:
     """Create a rule scoped to a single project (no rulebook ceremony).
 
-    Project-scoped rules apply only to the named project; they don't
-    propagate via rulebook subscriptions. Topic_id is left NULL — the
-    CHECK constraint enforces exactly-one of (topic_id, project_id).
+    Project-scoped rules apply only to the named project: retrieval surfaces
+    them in that project's sessions and nowhere else (milestone 414), where a
+    rule in a rulebook topic is global. Topic_id is left NULL — the CHECK
+    constraint enforces exactly-one of (topic_id, project_id).
     """
     async with async_session() as session:
         await _assert_project_owned(session, project_id, user_id)
@@ -555,18 +526,40 @@ async def list_rules(
     topic_id: int | None = None,
     project_id: int | None = None,
 ) -> list[Rule]:
-    """List rules filtered by any of the three IDs. All filters are ownership-scoped.
+    """List rules by rulebook, topic or project. Ownership-scoped.
 
-    When project_id is set, the result includes both rulebook rules reached via
-    project_rulebook_subscriptions AND project-scoped rules (Rule.project_id).
-    When rulebook_id or topic_id is set, project-scoped rules are excluded by
-    construction (they have neither). With no filter, only rulebook rules are
-    returned — adding all of a user's project-scoped rules unprompted would
-    surprise existing callers.
+    A rule has one home (milestone 414): a rulebook topic, where it is global,
+    or a project. So the filters name homes rather than reach:
+
+    - `project_id` lists that project's OWN rules. Global rules apply to every
+      project, so listing them under each one would say nothing; list them by
+      rulebook, or unfiltered. `rulebook_id` / `topic_id` don't combine with it
+      — a project rule has neither.
+    - `rulebook_id` / `topic_id` list global rules in that rulebook or topic.
+    - No filter lists every global rule. A user's project rules are left out:
+      they belong to their projects, and mixing them into the rulebook listing
+      would surprise its callers.
+
+    Before milestone 414, `project_id` returned the rules of every rulebook the
+    project SUBSCRIBED to plus its own. Subscriptions are gone.
     """
-    from scribe.models.rulebook import project_rulebook_subscriptions
+    from scribe.models.project import Project
 
     async with async_session() as session:
+        if project_id:
+            result = await session.execute(
+                select(Rule)
+                .join(Project, Rule.project_id == Project.id)
+                .where(
+                    Project.user_id == user_id,
+                    Rule.project_id == project_id,
+                    Rule.deleted_at.is_(None),
+                    Project.deleted_at.is_(None),
+                )
+                .order_by(Rule.order_index, Rule.title)
+            )
+            return list(result.scalars().all())
+
         stmt = (
             select(Rule)
             .join(RulebookTopic, Rule.topic_id == RulebookTopic.id)
@@ -582,39 +575,11 @@ async def list_rules(
             stmt = stmt.where(Rule.topic_id == topic_id)
         if rulebook_id:
             stmt = stmt.where(RulebookTopic.rulebook_id == rulebook_id)
-        if project_id:
-            stmt = (
-                stmt.join(
-                    project_rulebook_subscriptions,
-                    project_rulebook_subscriptions.c.rulebook_id == Rulebook.id,
-                )
-                .where(project_rulebook_subscriptions.c.project_id == project_id)
-            )
         stmt = stmt.order_by(
             Rulebook.id, RulebookTopic.order_index, Rule.order_index, Rule.title,
         )
         result = await session.execute(stmt)
-        rulebook_rules = list(result.scalars().all())
-
-        if not project_id:
-            return rulebook_rules
-
-        # Project-scoped rules (topic_id IS NULL, project_id matches).
-        # Verifies ownership by joining Project on user_id.
-        from scribe.models.project import Project
-        proj_stmt = (
-            select(Rule)
-            .join(Project, Rule.project_id == Project.id)
-            .where(
-                Project.user_id == user_id,
-                Rule.project_id == project_id,
-                Rule.deleted_at.is_(None),
-                Project.deleted_at.is_(None),
-            )
-            .order_by(Rule.order_index, Rule.title)
-        )
-        proj_result = await session.execute(proj_stmt)
-        return rulebook_rules + list(proj_result.scalars().all())
+        return list(result.scalars().all())
 
 
 async def _fetch_owned_rule(session, rule_id: int, user_id: int) -> Optional[Rule]:
@@ -930,282 +895,42 @@ async def delete_rule(rule_id: int, user_id: int) -> None:
         await session.commit()
 
 
-# ── Subscriptions + get_applicable_rules ───────────────────────────────
-
-async def subscribe_project(
-    project_id: int, rulebook_id: int, user_id: int,
-) -> None:
-    """Add a subscription. Idempotent — duplicates raise; we swallow."""
-    from scribe.models.rulebook import project_rulebook_subscriptions
-
-    async with async_session() as session:
-        await _assert_project_owned(session, project_id, user_id)
-        await _assert_rulebook_owned(session, rulebook_id, user_id)
-        # ON CONFLICT DO NOTHING via try/except to keep dialect-agnostic.
-        try:
-            await session.execute(
-                insert(project_rulebook_subscriptions).values(
-                    project_id=project_id, rulebook_id=rulebook_id,
-                )
-            )
-            await session.commit()
-        except Exception:
-            await session.rollback()  # PK collision = already subscribed; fine.
-
-
-async def unsubscribe_project(
-    project_id: int, rulebook_id: int, user_id: int,
-) -> None:
-    from scribe.models.rulebook import project_rulebook_subscriptions
-
-    async with async_session() as session:
-        await _assert_project_owned(session, project_id, user_id)
-        await _assert_rulebook_owned(session, rulebook_id, user_id)
-        await session.execute(
-            sql_delete(project_rulebook_subscriptions).where(
-                project_rulebook_subscriptions.c.project_id == project_id,
-                project_rulebook_subscriptions.c.rulebook_id == rulebook_id,
-            )
-        )
-        await session.commit()
-
-
-# ── Suppressions — project-level mute of rulebook rules / topics ────────
-
-async def suppress_rule_for_project(
-    project_id: int, rule_id: int, user_id: int,
-) -> None:
-    """Mute one rulebook rule for one project. Idempotent."""
-    from scribe.models.rulebook import project_rule_suppressions
-
-    async with async_session() as session:
-        await _assert_project_owned(session, project_id, user_id)
-        await _assert_rulebook_rule_owned(session, rule_id, user_id)
-        try:
-            await session.execute(
-                insert(project_rule_suppressions).values(
-                    project_id=project_id, rule_id=rule_id,
-                )
-            )
-            await session.commit()
-        except Exception:
-            await session.rollback()  # PK collision = already suppressed; fine.
-
-
-async def unsuppress_rule_for_project(
-    project_id: int, rule_id: int, user_id: int,
-) -> None:
-    """Unmute one rulebook rule for one project. Idempotent."""
-    from scribe.models.rulebook import project_rule_suppressions
-
-    async with async_session() as session:
-        await _assert_project_owned(session, project_id, user_id)
-        await session.execute(
-            sql_delete(project_rule_suppressions).where(
-                project_rule_suppressions.c.project_id == project_id,
-                project_rule_suppressions.c.rule_id == rule_id,
-            )
-        )
-        await session.commit()
-
-
-async def suppress_topic_for_project(
-    project_id: int, topic_id: int, user_id: int,
-) -> None:
-    """Mute every rule under one topic for one project. Idempotent."""
-    from scribe.models.rulebook import project_topic_suppressions
-
-    async with async_session() as session:
-        await _assert_project_owned(session, project_id, user_id)
-        await _assert_topic_owned(session, topic_id, user_id)
-        try:
-            await session.execute(
-                insert(project_topic_suppressions).values(
-                    project_id=project_id, topic_id=topic_id,
-                )
-            )
-            await session.commit()
-        except Exception:
-            await session.rollback()
-
-
-async def unsuppress_topic_for_project(
-    project_id: int, topic_id: int, user_id: int,
-) -> None:
-    """Unmute a topic for one project. Idempotent."""
-    from scribe.models.rulebook import project_topic_suppressions
-
-    async with async_session() as session:
-        await _assert_project_owned(session, project_id, user_id)
-        await session.execute(
-            sql_delete(project_topic_suppressions).where(
-                project_topic_suppressions.c.project_id == project_id,
-                project_topic_suppressions.c.topic_id == topic_id,
-            )
-        )
-        await session.commit()
-
-
-def _tagged_rule_ids():
-    """Rules carrying at least one canonical area tag (milestone 394).
-
-    The complement is what matters: a rule NOT in this set was never narrowed
-    by its author, so it is general to its rulebook and applies wherever that
-    rulebook is subscribed. Expressed as a subquery rather than a fetched list
-    so the area test stays inside the one statement `limit` is counted on.
-    """
-    return select(rule_systems.c.rule_id)
-
+# ── get_applicable_rules ────────────────────────────────────────────────
 
 async def get_applicable_rules(
     project_id: int, user_id: int, limit: int = 50,
 ) -> dict:
-    """Return rules applicable to a project — both via rulebook subscriptions
-    and project-scoped rules (Rule.project_id matches), with suppressed rules
-    and suppressed topics filtered out.
+    """The rules a project's LISTING shows: its own, and the global rules
+    deterministically bound to the areas it works in.
 
     Shape:
         {
-          "rules": [{id, title, statement,
-                     topic_id, topic_title,
-                     rulebook_id, rulebook_title}, ...],
-          "project_rules": [{id, title, statement}, ...],
-          "suppressed_rules": [{id, title,
-                                topic_id, topic_title,
-                                rulebook_id, rulebook_title}, ...],
-          "suppressed_topics": [{id, title,
-                                 rulebook_id, rulebook_title}, ...],
+          "rules": [{id, title, statement, topic_id, topic_title,
+                     rulebook_id, rulebook_title, ...}, ...],
+          "project_rules": [{id, title, statement, ...}, ...],
           "truncated": bool,
-          "subscribed_rulebooks": [{id, title}, ...]
         }
 
-    `rules` is the subscription-derived set with project-level suppressions
-    applied. `project_rules` is the project-scoped set (never suppressed —
-    delete instead). `suppressed_rules` / `suppressed_topics` carry the
-    titles + rulebook context callers need to display what was filtered
-    without round-tripping for names.
+    NOT WHAT A SESSION RECEIVES. Rules reach a session by retrieval, which
+    reads a rule's home (milestone 414): global rules everywhere, a project's
+    own rules in that project. This is the listing a planning read carries so
+    a reader can see which constraints are on the table, and it is narrower
+    than retrieval on purpose — "every global rule" is not a list anyone reads.
+
+    `rules` is the global rules TAGGED to a canonical area this project works
+    in (milestone 307, D7): a deterministic tag match, never a similarity
+    score. Before milestone 414 this was every rule in a SUBSCRIBED rulebook,
+    narrowed by area only where an author had tagged one. With subscriptions
+    gone there is no opt-in left to scope the untagged ones, and an untagged
+    global rule is general by construction — it arrives by retrieval when the
+    work makes it relevant, like every other rule.
+
+    `project_rules` is the project's own, never filtered by area: a rule
+    written ON a project is scoped to it already.
     """
-    from scribe.models.rulebook import (
-        project_rulebook_subscriptions,
-        project_rule_suppressions,
-        project_topic_suppressions,
-    )
+    from scribe.models.project import Project
 
     async with async_session() as session:
-        # Subscribed rulebooks for the project (ownership-scoped).
-        sub_q = (
-            select(Rulebook.id, Rulebook.title)
-            .join(
-                project_rulebook_subscriptions,
-                project_rulebook_subscriptions.c.rulebook_id == Rulebook.id,
-            )
-            .where(
-                project_rulebook_subscriptions.c.project_id == project_id,
-                Rulebook.owner_user_id == user_id,
-                Rulebook.deleted_at.is_(None),
-            )
-            .order_by(Rulebook.title)
-        )
-        sub_rows = (await session.execute(sub_q)).all()
-        subscribed_rulebooks = [
-            {"id": rb_id, "title": rb_title} for rb_id, rb_title in sub_rows
-        ]
-
-        # Suppressed rules — joined to topic + rulebook so callers can render
-        # context without a follow-up lookup. Ownership-scoped via rulebook.
-        suppressed_rules_q = (
-            select(
-                Rule.id, Rule.title,
-                RulebookTopic.id.label("topic_id"),
-                RulebookTopic.title.label("topic_title"),
-                Rulebook.id.label("rulebook_id"),
-                Rulebook.title.label("rulebook_title"),
-            )
-            .join(project_rule_suppressions, project_rule_suppressions.c.rule_id == Rule.id)
-            .join(RulebookTopic, Rule.topic_id == RulebookTopic.id)
-            .join(Rulebook, RulebookTopic.rulebook_id == Rulebook.id)
-            .where(
-                project_rule_suppressions.c.project_id == project_id,
-                Rulebook.owner_user_id == user_id,
-            )
-            .order_by(Rulebook.title, RulebookTopic.title, Rule.title)
-        )
-        suppressed_rule_rows = (await session.execute(suppressed_rules_q)).all()
-        suppressed_rules = [
-            {"id": rid, "title": rt, "topic_id": ti, "topic_title": tt,
-             "rulebook_id": rbi, "rulebook_title": rbt}
-            for rid, rt, ti, tt, rbi, rbt in suppressed_rule_rows
-        ]
-        suppressed_rule_ids = [r["id"] for r in suppressed_rules]
-
-        # Suppressed topics — joined to rulebook for context.
-        suppressed_topics_q = (
-            select(
-                RulebookTopic.id, RulebookTopic.title,
-                Rulebook.id.label("rulebook_id"),
-                Rulebook.title.label("rulebook_title"),
-            )
-            .join(project_topic_suppressions, project_topic_suppressions.c.topic_id == RulebookTopic.id)
-            .join(Rulebook, RulebookTopic.rulebook_id == Rulebook.id)
-            .where(
-                project_topic_suppressions.c.project_id == project_id,
-                Rulebook.owner_user_id == user_id,
-            )
-            .order_by(Rulebook.title, RulebookTopic.title)
-        )
-        suppressed_topic_rows = (await session.execute(suppressed_topics_q)).all()
-        suppressed_topics = [
-            {"id": tid, "title": tt, "rulebook_id": rbi, "rulebook_title": rbt}
-            for tid, tt, rbi, rbt in suppressed_topic_rows
-        ]
-        suppressed_topic_ids = [t["id"] for t in suppressed_topics]
-
-        # Applicable rules (limit + 1 so we can detect truncation). Filter
-        # in SQL so truncation reflects the post-suppression count, not the
-        # raw subscription count.
-        # Selects the ENTITY, not a column list: rule_brief is the one place
-        # that decides which fields a surfaced rule carries, and a column list
-        # here would be a second such decision to keep in step. The row count
-        # is bounded by `limit`, so this is a listing, not a scan.
-        rules_q = (
-            select(
-                Rule,
-                RulebookTopic.title.label("topic_title"),
-                Rulebook.id.label("rulebook_id"),
-                Rulebook.title.label("rulebook_title"),
-            )
-            .join(RulebookTopic, Rule.topic_id == RulebookTopic.id)
-            .join(Rulebook, RulebookTopic.rulebook_id == Rulebook.id)
-            .join(
-                project_rulebook_subscriptions,
-                project_rulebook_subscriptions.c.rulebook_id == Rulebook.id,
-            )
-            .where(
-                project_rulebook_subscriptions.c.project_id == project_id,
-                Rulebook.owner_user_id == user_id,
-                Rule.deleted_at.is_(None),
-                RulebookTopic.deleted_at.is_(None),
-                Rulebook.deleted_at.is_(None),
-                # An inception exclusion is total (milestone 297): a rulebook the
-                # project opted out of contributes nothing, subscribed or not.
-            )
-            .order_by(
-                Rulebook.id, RulebookTopic.order_index, Rule.order_index, Rule.title,
-            )
-            .limit(limit + 1)
-        )
-        if suppressed_rule_ids:
-            rules_q = rules_q.where(Rule.id.notin_(suppressed_rule_ids))
-        if suppressed_topic_ids:
-            rules_q = rules_q.where(Rule.topic_id.notin_(suppressed_topic_ids))
-        # AREA BINDING (milestone 307, narrowed by 394). A rule reaches this
-        # project when it is tagged to an area the project actually works in —
-        # a deterministic tag match, never a similarity score, so bindingness
-        # never depends on a ranking (D7).
-        #
-        # Applied in SQL rather than by filtering afterwards, so `limit` counts
-        # the rules that will actually be surfaced instead of counting rules
-        # that are about to be dropped.
         project_area_ids = (await session.execute(
             select(System.canonical_id).where(
                 System.project_id == project_id,
@@ -1214,36 +939,37 @@ async def get_applicable_rules(
                 System.status == "active",
             ).distinct()
         )).scalars().all()
-        reachable = select(rule_systems.c.rule_id).where(
-            rule_systems.c.canonical_id.in_(project_area_ids)
-        ) if project_area_ids else None
-        # SUBSCRIPTION IS THE SCOPE; AREAS NARROW ONLY WHERE AN AUTHOR ASKED.
-        #
-        # This read `always_on OR reachable` (milestone 307). The tier arm is
-        # gone, and the first attempt at 394 kept only the reachable arm — so
-        # a subscribed rulebook's untagged rules stopped arriving at all. That
-        # was wrong twice over: the query above is ALREADY scoped to rulebooks
-        # this project subscribed to, so the project opted in and was then
-        # handed a subset of what it asked for; and the milestone is explicit
-        # that subscription-derived rules are not what it removes. The
-        # integration suite caught it through a co_surfaces partner that never
-        # arrived because the rule it travels with had been filtered out.
-        #
-        # So: every rule in a subscribed rulebook applies, EXCEPT that a rule
-        # tagged to specific areas applies only to a project working in one of
-        # them. An untagged rule is general to its rulebook by construction —
-        # nobody narrowed it — while tagging is an author saying "this is
-        # about CI" and meaning it. That keeps D7's deterministic narrowing
-        # where it was asked for without inventing it where it was not.
-        if reachable is not None:
-            rules_q = rules_q.where(
-                or_(Rule.id.in_(reachable), Rule.id.notin_(_tagged_rule_ids())),
-            )
-        else:
-            # No canonical areas on this project: nothing can match by area,
-            # so only the untagged (general) rules apply.
-            rules_q = rules_q.where(Rule.id.notin_(_tagged_rule_ids()))
-        rule_rows = (await session.execute(rules_q)).all()
+
+        rule_rows = []
+        if project_area_ids:
+            # Selects the ENTITY, not a column list: rule_brief is the one
+            # place that decides which fields a surfaced rule carries. Filtered
+            # in SQL so `limit` counts the rules that will actually be shown.
+            rule_rows = (await session.execute(
+                select(
+                    Rule,
+                    RulebookTopic.title.label("topic_title"),
+                    Rulebook.id.label("rulebook_id"),
+                    Rulebook.title.label("rulebook_title"),
+                )
+                .join(RulebookTopic, Rule.topic_id == RulebookTopic.id)
+                .join(Rulebook, RulebookTopic.rulebook_id == Rulebook.id)
+                .where(
+                    Rulebook.owner_user_id == user_id,
+                    Rule.deleted_at.is_(None),
+                    RulebookTopic.deleted_at.is_(None),
+                    Rulebook.deleted_at.is_(None),
+                    Rule.id.in_(
+                        select(rule_systems.c.rule_id).where(
+                            rule_systems.c.canonical_id.in_(project_area_ids)
+                        )
+                    ),
+                )
+                .order_by(
+                    Rulebook.id, RulebookTopic.order_index, Rule.order_index, Rule.title,
+                )
+                .limit(limit + 1)
+            )).all()
         truncated = len(rule_rows) > limit
         rules = [
             rule_brief(rule, topic_title=tt, rulebook_id=rbi, rulebook_title=rbt)
@@ -1251,8 +977,7 @@ async def get_applicable_rules(
         ]
 
         # Project-scoped rules — verifies ownership via Project.user_id.
-        from scribe.models.project import Project
-        proj_rules_q = (
+        proj_rule_rows = (await session.execute(
             select(Rule)
             .join(Project, Rule.project_id == Project.id)
             .where(
@@ -1262,32 +987,26 @@ async def get_applicable_rules(
                 Project.deleted_at.is_(None),
             )
             .order_by(Rule.order_index, Rule.title)
-        )
-        # A PROJECT'S OWN RULES ARE NOT FILTERED BY AREA, and the asymmetry
-        # with the family query above is the point. A family rule has to earn
-        # its way into this project; a rule written ON this project is scoped
-        # to it by construction, and filtering it again would drop rules whose
-        # only fault is that nobody tagged them to a System.
-        proj_rule_rows = (await session.execute(proj_rules_q)).all()
+        )).all()
         project_rules = [rule_brief(rule) for (rule,) in proj_rule_rows]
 
     # Edges travel with the rules they belong to (milestone 307).
     #
     # A co_surfaces partner that was not otherwise selected is ADDED, because a
     # rule that arrives without the half it fails with is the failure the edge
-    # was created to prevent. Suppressions are passed as exclusions so an
-    # explicit mute still wins over an edge.
+    # was created to prevent — but only a partner that could reach this
+    # project at all. An edge to another project's rule is not a way in.
     surfaced_ids = [r["id"] for r in rules] + [r["id"] for r in project_rules]
-    partners = await co_surfaced_partners(
-        user_id, surfaced_ids, exclude_ids=set(suppressed_rule_ids),
-    )
+    partners = await co_surfaced_partners(user_id, surfaced_ids)
     for partner in partners:
+        if partner.project_id not in (None, project_id):
+            continue
         rules.append(rule_brief(partner, via="co_surfaces"))
         surfaced_ids.append(partner.id)
 
     # Relations on every surfaced rule, so a reader can see that an override
     # exists rather than discovering the contradiction by acting on the wrong
-    # one. Areas too — they are why a conditional rule is here at all.
+    # one. Areas too — they are why a global rule is in this listing at all.
     edges = await list_rule_relations(surfaced_ids)
     areas = await list_rule_systems(surfaced_ids)
     for brief in (*rules, *project_rules):
@@ -1296,14 +1015,7 @@ async def get_applicable_rules(
         if areas.get(brief["id"]):
             brief["systems"] = areas[brief["id"]]
 
-    return {
-        "rules": rules,
-        "project_rules": project_rules,
-        "suppressed_rules": suppressed_rules,
-        "suppressed_topics": suppressed_topics,
-        "truncated": truncated,
-        "subscribed_rulebooks": subscribed_rulebooks,
-    }
+    return {"rules": rules, "project_rules": project_rules, "truncated": truncated}
 
 
 def rules_payload(
@@ -1313,11 +1025,11 @@ def rules_payload(
 
     Every surface that hands rules to an agent (enter_project, get_project,
     get_milestone, get_task for legacy plans, start_planning) carries the
-    same seven keys under the same names — so a reader learns them once. One
+    same 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.
 
-    IT ALSO RECORDS THE SURFACING, which is why it now takes a caller and a
+    IT ALSO RECORDS THE SURFACING, which is why it takes a caller and a
     source. Every one of those surfaces is a bulk delivery — the applicable set
     handed over whole, chosen by nobody — so this is the one place that has to
     emit for all of them. Doing it per-caller instead would be five sites to
@@ -1330,17 +1042,16 @@ def rules_payload(
     `RANKED_SOURCES` in `rule_usage` is what folds them back together.
 
     Emitting from here is safe in a way emitting from `get_applicable_rules`
-    would not be: this function is only ever called to BUILD A REPLY. The two
-    other callers of the rules machinery — the write-path etag arm
-    (`plugin_context`) — computed a marker and showed nobody
-    anything, and counting those would put rules in the denominator that no
-    agent ever saw.
+    would not be: this function is only ever called to BUILD A REPLY. The
+    other caller of the rules machinery — the write-path etag arm
+    (`plugin_context`) — computes a marker and shows nobody anything, and
+    counting it would put rules in the denominator that no agent ever saw.
 
     `brief` is the session handshake's form (#4045): the project's own rules
-    as id and title, and the subscribed rulebooks, nothing else. Rules reach a
-    session in full by retrieval, which ignores subscriptions, so the handshake
-    lists which constraints exist rather than restating them; get_rule reads
-    one. Only what is shown is recorded as surfaced.
+    as id and title, nothing else. Rules reach a session in full by
+    retrieval, so the handshake lists which of the project's constraints exist
+    rather than restating them; get_rule reads one. Only what is shown is
+    recorded as surfaced.
     """
     if brief:
         project_rules = [
@@ -1350,10 +1061,7 @@ def rules_payload(
         record_rule_surfaced(
             user_id=user_id, rule_ids=[r["id"] for r in project_rules], source=source,
         )
-        return {
-            "project_rules": project_rules,
-            "subscribed_rulebooks": applicable["subscribed_rulebooks"],
-        }
+        return {"project_rules": project_rules}
     record_rule_surfaced(
         user_id=user_id,
         rule_ids=(
@@ -1365,10 +1073,7 @@ def rules_payload(
     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/trash.py

@@ -83,22 +83,6 @@ async def _cascade(session, user_id: int, etype: str, eid: int, batch: str, now)
         await _set(session, Milestone, [Milestone.user_id == user_id, Milestone.project_id == eid], batch, now)
         # Project-scoped rules cascade with the project they're attached to.
         await _set(session, Rule, [Rule.project_id == eid], batch, now)
-        # Suppressions are pure associations (no deleted_at) — hard-delete
-        # them here so restoring the project doesn't bring stale mutes back.
-        # 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 scribe.models.rulebook import (
-            project_rule_suppressions, project_topic_suppressions,
-        )
-        await session.execute(
-            sql_delete(project_rule_suppressions)
-            .where(project_rule_suppressions.c.project_id == eid)
-        )
-        await session.execute(
-            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)
     elif etype == "milestone":
         await _set(session, Note, [Note.user_id == user_id, Note.milestone_id == eid], batch, now)