Killed "active" session dependency:

1. roboco/mcp/schemas/__init__.py:
    - SendMessageInput.task_id → required
    - AskQuestionInput.task_id → required
    - ReportBlockerInput.task_id → required
  2. roboco/mcp/message_server.py:
    - Removed _get_active_session() entirely (dead code)
    - Simplified _handle_message_send() - no fallback, just uses task's linked session
    - Updated tool signatures for roboco_ask_question and roboco_report_blocker
  3. roboco/api/routes/tasks.py (earlier fix):
    - Added subtask validation before parent completion

  New behavior:
  - All messages MUST have task_id
  - Task's linked session is the only source of truth
  - No session? → Clear error: "Cell PM must create one"
  - No more "active" status guessing

agents/blueprints/backend/be-pm.md

@@ -225,6 +225,7 @@ Tell the team what you did:
 ```json
 {
   "channel_slug": "backend-cell",
+  "task_id": "{task_id}",
   "content": "Triaged TASK-XXX. Created 3 subtasks, assigned to BE-Dev-1.",
   "message_type": "action"
 }
@@ -317,6 +318,7 @@ roboco_task_claim("TASK-042")
 # Announce in channel
 roboco_message_send({
   "channel_slug": "backend-cell",
+  "task_id": "TASK-042",
   "content": "Triaging TASK-042: Implement rate limiting",
   "message_type": "action"
 })
@@ -363,6 +365,7 @@ roboco_task_create({
 # 8. COMMUNICATE
 roboco_message_send({
   "channel_slug": "backend-cell",
+  "task_id": "TASK-042",
   "content": "TASK-042 triaged. 3 subtasks created, assigned to BE-Dev-1.",
   "message_type": "action"
 })

agents/blueprints/backend/be-qa.md

@@ -161,6 +161,7 @@ roboco_task_qa_pass(task_id, {
 ```json
 {
   "channel_slug": "backend-cell",
+  "task_id": "{task_id}",
   "content": "QA PASS for TASK-XXX. Proceeding to documenter, then PM review.",
   "message_type": "action"
 }
@@ -200,6 +201,7 @@ roboco_task_qa_fail(task_id, {
 ```json
 {
   "channel_slug": "backend-cell",
+  "task_id": "{task_id}",
   "content": "QA FAIL for TASK-XXX. Issues: [list]. Returning to dev.",
   "message_type": "blocker"
 }

agents/blueprints/frontend/fe-pm.md

@@ -217,6 +217,7 @@ Tell the team what you did:
 ```json
 {
   "channel_slug": "frontend-cell",
+  "task_id": "{task_id}",
   "content": "Triaged TASK-XXX. Created 3 subtasks, assigned to FE-Dev-1.",
   "message_type": "action"
 }
@@ -325,6 +326,7 @@ roboco_task_scan(team="frontend")
 roboco_task_claim("TASK-055")
 roboco_message_send({
   "channel_slug": "frontend-cell",
+  "task_id": "TASK-055",
   "content": "Triaging TASK-055: User preferences modal",
   "message_type": "action"
 })
@@ -363,6 +365,7 @@ roboco_task_assign("TASK-055", "fe-dev-1")
 # 8. COMMUNICATE
 roboco_message_send({
   "channel_slug": "frontend-cell",
+  "task_id": "TASK-055",
   "content": "TASK-055 assigned to FE-Dev-1. Design ready, API available.",
   "message_type": "action"
 })

agents/blueprints/ux_ui/ux-pm.md

@@ -217,6 +217,7 @@ Tell the team what you did:
 ```json
 {
   "channel_slug": "uxui-cell",
+  "task_id": "{task_id}",
   "content": "Triaged TASK-XXX. Assigned to UX-Dev.",
   "message_type": "action"
 }
@@ -330,6 +331,7 @@ roboco_task_scan(team="ux_ui")
 roboco_task_claim("TASK-055")
 roboco_message_send({
   "channel_slug": "uxui-cell",
+  "task_id": "TASK-055",
   "content": "Triaging TASK-055: User preferences modal design",
   "message_type": "action"
 })
@@ -368,6 +370,7 @@ roboco_task_assign("TASK-055", "ux-dev")
 # 8. COMMUNICATE
 roboco_message_send({
   "channel_slug": "uxui-cell",
+  "task_id": "TASK-055",
   "content": "TASK-055 assigned to UX-Dev. Frontend needs by Friday.",
   "message_type": "action"
 })