feat(rulebook): augment get_project with applicable_rules + MCP instructions

src/fabledassistant/mcp/tools/projects.py

@@ -19,6 +19,7 @@ from __future__ import annotations
 from fabledassistant.mcp._context import current_user_id
 from fabledassistant.services import milestones as milestones_svc
 from fabledassistant.services import projects as projects_svc
+from fabledassistant.services import rulebooks as rulebooks_svc
 
 
 async def list_projects() -> dict:
@@ -33,10 +34,11 @@ async def list_projects() -> dict:
 
 
 async def get_project(project_id: int) -> dict:
-    """Fetch a Scribe project by ID, including its milestone summary.
+    """Fetch a Scribe project by ID.
 
-    Returns full project fields plus a milestone_summary list with each
-    milestone's id, title, status, and task counts.
+    Returns full project fields, a milestone_summary list, and the
+    rulebook-applicable_rules / subscribed_rulebooks pair the assistant
+    should consult when working on this project.
     """
     uid = current_user_id()
     project = await projects_svc.get_project(uid, project_id)
@@ -46,6 +48,12 @@ async def get_project(project_id: int) -> dict:
     data["milestone_summary"] = await milestones_svc.get_project_milestone_summary(
         uid, project_id,
     )
+    applicable = await rulebooks_svc.get_applicable_rules(
+        project_id=project_id, user_id=uid,
+    )
+    data["applicable_rules"] = applicable["rules"]
+    data["applicable_rules_truncated"] = applicable["truncated"]
+    data["subscribed_rulebooks"] = applicable["subscribed_rulebooks"]
     return data