feat(rules): project rule + topic suppressions

Lets a project mute individual rules or whole topics from rulebooks it
subscribes to, without unsubscribing the rulebook. Two new association
tables (migration 0060), 4 MCP tools (suppress/unsuppress × rule/topic),
4 REST endpoints, and an inline "× skip" affordance plus collapsed
"Suppressed (N)" section in the project's Rules tab.

get_applicable_rules now emits suppressed_rules and suppressed_topics
(detail objects with rulebook/topic context, not just IDs) so the UI
can render the suppressed list without a follow-up lookup. The main
rules projection grew topic_id and rulebook_id columns for the per-row
suppress affordance.

Project deletion cascades the suppression rows via hard DELETE — they
are pure associations with no soft-delete column, and restoring a
deleted project should start fresh, not inherit stale mutes.

Project-scoped rules (Rule.project_id) are deliberately not suppressible
— delete them with delete_rule instead.

Implements plan-task #187.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/fabledassistant/mcp/tools/projects.py

@@ -80,6 +80,8 @@ async def enter_project(project_id: int) -> dict:
         "milestone_summary": milestone_summary,
         "applicable_rules": applicable["rules"],
         "project_rules": applicable.get("project_rules", []),
+        "suppressed_rules": applicable.get("suppressed_rules", []),
+        "suppressed_topics": applicable.get("suppressed_topics", []),
         "subscribed_rulebooks": applicable["subscribed_rulebooks"],
         "applicable_rules_truncated": applicable["truncated"],
         "open_tasks": [
@@ -122,6 +124,8 @@ async def get_project(project_id: int) -> dict:
     data["applicable_rules_truncated"] = applicable["truncated"]
     data["subscribed_rulebooks"] = applicable["subscribed_rulebooks"]
     data["project_rules"] = applicable.get("project_rules", [])
+    data["suppressed_rules"] = applicable.get("suppressed_rules", [])
+    data["suppressed_topics"] = applicable.get("suppressed_topics", [])
     return data
 
 

src/fabledassistant/mcp/tools/rulebooks.py

@@ -364,6 +364,62 @@ async def unsubscribe_project_from_rulebook(
     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}
+
+
 def register(mcp) -> None:
     for fn in (
         list_rulebooks, get_rulebook, create_rulebook, update_rulebook, delete_rulebook,
@@ -371,5 +427,7 @@ def register(mcp) -> None:
         list_rules, list_always_on_rules, get_rule,
         create_rule, create_project_rule, update_rule, delete_rule,
         subscribe_project_to_rulebook, unsubscribe_project_from_rulebook,
+        suppress_rule_for_project, unsuppress_rule_for_project,
+        suppress_topic_for_project, unsuppress_topic_for_project,
     ):
         mcp.tool(name=fn.__name__)(fn)

src/fabledassistant/mcp/tools/tasks.py

@@ -83,6 +83,8 @@ async def get_task(task_id: int) -> dict:
         data["subscribed_rulebooks"] = applicable["subscribed_rulebooks"]
         data["applicable_rules_truncated"] = applicable["truncated"]
         data["project_rules"] = applicable.get("project_rules", [])
+        data["suppressed_rules"] = applicable.get("suppressed_rules", [])
+        data["suppressed_topics"] = applicable.get("suppressed_topics", [])
     return data