feat(observability): propagate correlation_id end-to-end

X-Correlation-ID was bound to structlog but lost on the MCP→API hop.
MCP shims now forward it; Envelope carries it back to the agent;
audit_log row records it for forensic joins.

roboco/api/routes/v2/_role_dep.py

@@ -1,4 +1,4 @@
-"""Role-asserting dependencies for v2 flow routers.
+"""Role-asserting dependencies and shared helpers for v2 flow routers.
 
 Every router gets one of these as a dependency so the role check happens
 before the choreographer body even runs. Defense in depth — the
@@ -7,10 +7,15 @@ choreographer also re-checks role internally for verbs that branch on it.
 
 from __future__ import annotations
 
-from typing import Annotated, cast
+from typing import TYPE_CHECKING, Annotated, Any, cast
 
 from fastapi import Depends, Header, HTTPException, params, status
 
+if TYPE_CHECKING:
+    from fastapi import Request
+
+    from roboco.services.gateway.envelope import Envelope
+
 
 def _require_roles(allowed: frozenset[str]) -> params.Depends:
     def _check(
@@ -32,3 +37,18 @@ require_cell_pm = _require_roles(frozenset({"cell_pm"}))
 require_main_pm = _require_roles(frozenset({"main_pm"}))
 require_board = _require_roles(frozenset({"product_owner", "head_marketing"}))
 require_auditor = _require_roles(frozenset({"auditor"}))
+
+
+def envelope_to_response(env: Envelope, request: Request) -> dict[str, Any]:
+    """Stamp the request's correlation_id onto the envelope and return wire-dict.
+
+    ``CorrelationIdMiddleware`` writes the inbound (or freshly-generated)
+    ``X-Correlation-ID`` to ``request.state.correlation_id``. We pull it
+    here so the agent receives the same id it sent (or can capture the
+    server-generated one) and ops can join logs across the full
+    MCP -> API -> service hop.
+    """
+    cid = getattr(request.state, "correlation_id", None)
+    if cid is not None and env.correlation_id is None:
+        env.correlation_id = cid
+    return env.as_dict()

roboco/api/routes/v2/do.py

@@ -3,9 +3,10 @@
 from typing import Annotated
 from uuid import UUID
 
-from fastapi import APIRouter, Depends, Header
+from fastapi import APIRouter, Depends, Header, Request
 
 from roboco.api.deps import get_content_actions
+from roboco.api.routes.v2._role_dep import envelope_to_response
 from roboco.api.schemas.v2.do import (
     CommitRequest,
     DmRequest,
@@ -23,6 +24,7 @@ _ContentActionsDep = Annotated[ContentActions, Depends(get_content_actions)]
 
 @router.post("/commit")
 async def do_commit(
+    request: Request,
     body: CommitRequest,
     x_agent_id: _AgentIdHeader,
     actions: _ContentActionsDep,
@@ -32,11 +34,12 @@ async def do_commit(
         message=body.message,
         files=body.files,
     )
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/note")
 async def do_note(
+    request: Request,
     body: NoteRequest,
     x_agent_id: _AgentIdHeader,
     actions: _ContentActionsDep,
@@ -47,11 +50,12 @@ async def do_note(
         scope=body.scope,
         task_id=body.task_id,
     )
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/say")
 async def do_say(
+    request: Request,
     body: SayRequest,
     x_agent_id: _AgentIdHeader,
     actions: _ContentActionsDep,
@@ -62,11 +66,12 @@ async def do_say(
         text=body.text,
         task_id=body.task_id,
     )
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/dm")
 async def do_dm(
+    request: Request,
     body: DmRequest,
     x_agent_id: _AgentIdHeader,
     actions: _ContentActionsDep,
@@ -78,14 +83,15 @@ async def do_dm(
         task_id=body.task_id,
         skill=body.skill,
     )
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/evidence")
 async def do_evidence(
+    request: Request,
     body: EvidenceRequest,
     x_agent_id: _AgentIdHeader,
     actions: _ContentActionsDep,
 ) -> dict:
     env = await actions.evidence(agent_id=x_agent_id, task_id=body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)

roboco/api/routes/v2/flow_auditor.py

@@ -6,10 +6,10 @@ Thin handlers; delegate to Choreographer.
 from typing import Annotated
 from uuid import UUID
 
-from fastapi import APIRouter, Depends, Header
+from fastapi import APIRouter, Depends, Header, Request
 
 from roboco.api.deps import get_choreographer
-from roboco.api.routes.v2._role_dep import require_auditor
+from roboco.api.routes.v2._role_dep import envelope_to_response, require_auditor
 from roboco.api.schemas.v2.flow import IAmIdleRequest, TriageRequest
 from roboco.services.gateway.choreographer import Choreographer
 
@@ -26,19 +26,21 @@ _ChoreographerDep = Annotated[Choreographer, Depends(get_choreographer)]
 
 @router.post("/triage")
 async def triage(
+    request: Request,
     _body: TriageRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.auditor_triage(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_am_idle")
 async def i_am_idle(
+    request: Request,
     _body: IAmIdleRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_am_idle(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)

roboco/api/routes/v2/flow_board.py

@@ -6,10 +6,10 @@ Thin handlers; delegate to Choreographer.
 from typing import Annotated
 from uuid import UUID
 
-from fastapi import APIRouter, Depends, Header
+from fastapi import APIRouter, Depends, Header, Request
 
 from roboco.api.deps import get_choreographer
-from roboco.api.routes.v2._role_dep import require_board
+from roboco.api.routes.v2._role_dep import envelope_to_response, require_board
 from roboco.api.schemas.v2.flow import (
     EscalateToCeoRequest,
     IAmIdleRequest,
@@ -30,29 +30,32 @@ _ChoreographerDep = Annotated[Choreographer, Depends(get_choreographer)]
 
 @router.post("/triage")
 async def triage(
+    request: Request,
     _body: TriageRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.board_triage(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/escalate_to_ceo")
 async def escalate_to_ceo(
+    request: Request,
     body: EscalateToCeoRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.escalate_to_ceo(x_agent_id, body.task_id, body.reason)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_am_idle")
 async def i_am_idle(
+    request: Request,
     _body: IAmIdleRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_am_idle(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)

roboco/api/routes/v2/flow_cell_pm.py

@@ -3,10 +3,10 @@
 from typing import Annotated
 from uuid import UUID
 
-from fastapi import APIRouter, Depends, Header
+from fastapi import APIRouter, Depends, Header, Request
 
 from roboco.api.deps import get_choreographer
-from roboco.api.routes.v2._role_dep import require_cell_pm
+from roboco.api.routes.v2._role_dep import envelope_to_response, require_cell_pm
 from roboco.api.schemas.v2.flow import (
     CompleteRequest,
     DelegateRequest,
@@ -35,26 +35,29 @@ _ChoreographerDep = Annotated[Choreographer, Depends(get_choreographer)]
 
 @router.post("/give_me_work")
 async def give_me_work(
+    request: Request,
     _body: GiveMeWorkRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.pm_give_me_work(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_will_plan")
 async def i_will_plan(
+    request: Request,
     body: IWillPlanRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_will_plan(x_agent_id, body.task_id, body.plan)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/delegate")
 async def delegate(
+    request: Request,
     body: DelegateRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
@@ -69,84 +72,92 @@ async def delegate(
         estimated_complexity=body.estimated_complexity,
     )
     env = await choreographer.delegate(x_agent_id, body.parent_task_id, inputs)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/submit_up")
 async def submit_up(
+    request: Request,
     body: SubmitUpRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.submit_up(x_agent_id, body.task_id, body.notes)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/triage")
 async def triage(
+    request: Request,
     _body: TriageRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.triage(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/unblock")
 async def unblock(
+    request: Request,
     body: UnblockRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.unblock(x_agent_id, body.task_id, restore=body.restore)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/complete")
 async def complete(
+    request: Request,
     body: CompleteRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.complete(x_agent_id, body.task_id, body.notes)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/escalate_up")
 async def escalate_up(
+    request: Request,
     body: EscalateUpRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.escalate_up(x_agent_id, body.task_id, body.reason)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/unclaim")
 async def unclaim(
+    request: Request,
     body: UnclaimRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.unclaim(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/resume")
 async def resume(
+    request: Request,
     body: ResumeRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.resume(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_am_idle")
 async def i_am_idle(
+    request: Request,
     _body: IAmIdleRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_am_idle(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)

roboco/api/routes/v2/flow_dev.py

@@ -3,10 +3,10 @@
 from typing import Annotated
 from uuid import UUID
 
-from fastapi import APIRouter, Depends, Header
+from fastapi import APIRouter, Depends, Header, Request
 
 from roboco.api.deps import get_choreographer
-from roboco.api.routes.v2._role_dep import require_dev
+from roboco.api.routes.v2._role_dep import envelope_to_response, require_dev
 from roboco.api.schemas.v2.flow import (
     GiveMeWorkRequest,
     IAmBlockedRequest,
@@ -33,89 +33,98 @@ _ChoreographerDep = Annotated[Choreographer, Depends(get_choreographer)]
 
 @router.post("/give_me_work")
 async def give_me_work(
+    request: Request,
     _body: GiveMeWorkRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.give_me_work(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_will_work_on")
 async def i_will_work_on(
+    request: Request,
     body: IWillWorkOnRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_will_work_on(x_agent_id, body.task_id, body.plan)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_have_committed")
 async def i_have_committed(
+    request: Request,
     body: IHaveCommittedRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_have_committed(x_agent_id, body.message)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/submit_for_qa")
 async def submit_for_qa(
+    request: Request,
     body: SubmitForQaRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.submit_for_qa(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_am_done")
 async def i_am_done(
+    request: Request,
     body: IAmDoneRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_am_done(x_agent_id, body.task_id, body.notes)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_am_blocked")
 async def i_am_blocked(
+    request: Request,
     body: IAmBlockedRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_am_blocked(x_agent_id, body.task_id, body.reason)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/unclaim")
 async def unclaim(
+    request: Request,
     body: UnclaimRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.unclaim(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/resume")
 async def resume(
+    request: Request,
     body: ResumeRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.resume(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_am_idle")
 async def i_am_idle(
+    request: Request,
     _body: IAmIdleRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_am_idle(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)

roboco/api/routes/v2/flow_doc.py

@@ -3,10 +3,10 @@
 from typing import Annotated
 from uuid import UUID
 
-from fastapi import APIRouter, Depends, Header
+from fastapi import APIRouter, Depends, Header, Request
 
 from roboco.api.deps import get_choreographer
-from roboco.api.routes.v2._role_dep import require_doc
+from roboco.api.routes.v2._role_dep import envelope_to_response, require_doc
 from roboco.api.schemas.v2.flow import (
     ClaimDocTaskRequest,
     GiveMeWorkRequest,
@@ -30,26 +30,29 @@ _ChoreographerDep = Annotated[Choreographer, Depends(get_choreographer)]
 
 @router.post("/give_me_work")
 async def give_me_work(
+    request: Request,
     _body: GiveMeWorkRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.give_me_work(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/claim_doc_task")
 async def claim_doc_task(
+    request: Request,
     body: ClaimDocTaskRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.claim_doc_task(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_documented")
 async def i_documented(
+    request: Request,
     body: IDocumentedRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
@@ -57,34 +60,37 @@ async def i_documented(
     env = await choreographer.i_documented(
         x_agent_id, body.task_id, body.notes, body.files
     )
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/unclaim")
 async def unclaim(
+    request: Request,
     body: UnclaimRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.unclaim(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/resume")
 async def resume(
+    request: Request,
     body: ResumeRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.resume(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_am_idle")
 async def i_am_idle(
+    request: Request,
     _body: IAmIdleRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_am_idle(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)

roboco/api/routes/v2/flow_main_pm.py

@@ -3,10 +3,10 @@
 from typing import Annotated
 from uuid import UUID
 
-from fastapi import APIRouter, Depends, Header
+from fastapi import APIRouter, Depends, Header, Request
 
 from roboco.api.deps import get_choreographer
-from roboco.api.routes.v2._role_dep import require_main_pm
+from roboco.api.routes.v2._role_dep import envelope_to_response, require_main_pm
 from roboco.api.schemas.v2.flow import (
     CompleteRequest,
     DelegateRequest,
@@ -35,26 +35,29 @@ _ChoreographerDep = Annotated[Choreographer, Depends(get_choreographer)]
 
 @router.post("/give_me_work")
 async def give_me_work(
+    request: Request,
     _body: GiveMeWorkRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.pm_give_me_work(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_will_plan")
 async def i_will_plan(
+    request: Request,
     body: IWillPlanRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_will_plan(x_agent_id, body.task_id, body.plan)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/delegate")
 async def delegate(
+    request: Request,
     body: DelegateRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
@@ -69,84 +72,92 @@ async def delegate(
         estimated_complexity=body.estimated_complexity,
     )
     env = await choreographer.delegate(x_agent_id, body.parent_task_id, inputs)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/triage_all")
 async def triage_all(
+    request: Request,
     _body: TriageRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.triage_all(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/complete")
 async def complete(
+    request: Request,
     body: CompleteRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.main_pm_complete(x_agent_id, body.task_id, body.notes)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/escalate_up")
 async def escalate_up(
+    request: Request,
     body: EscalateUpRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.escalate_up(x_agent_id, body.task_id, body.reason)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/escalate_to_ceo")
 async def escalate_to_ceo(
+    request: Request,
     body: EscalateToCeoRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.escalate_to_ceo(x_agent_id, body.task_id, body.reason)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/unblock")
 async def unblock(
+    request: Request,
     body: UnblockRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.unblock(x_agent_id, body.task_id, restore=body.restore)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/unclaim")
 async def unclaim(
+    request: Request,
     body: UnclaimRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.unclaim(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/resume")
 async def resume(
+    request: Request,
     body: ResumeRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.resume(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_am_idle")
 async def i_am_idle(
+    request: Request,
     _body: IAmIdleRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_am_idle(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)

roboco/api/routes/v2/flow_qa.py

@@ -3,10 +3,10 @@
 from typing import Annotated
 from uuid import UUID
 
-from fastapi import APIRouter, Depends, Header
+from fastapi import APIRouter, Depends, Header, Request
 
 from roboco.api.deps import get_choreographer
-from roboco.api.routes.v2._role_dep import require_qa
+from roboco.api.routes.v2._role_dep import envelope_to_response, require_qa
 from roboco.api.schemas.v2.flow import (
     ClaimReviewRequest,
     FailReviewRequest,
@@ -31,69 +31,76 @@ _ChoreographerDep = Annotated[Choreographer, Depends(get_choreographer)]
 
 @router.post("/give_me_work")
 async def give_me_work(
+    request: Request,
     _body: GiveMeWorkRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.give_me_work(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/claim_review")
 async def claim_review(
+    request: Request,
     body: ClaimReviewRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.claim_review(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/pass")
 async def qa_pass(
+    request: Request,
     body: PassReviewRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.pass_review(x_agent_id, body.task_id, body.notes)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/fail")
 async def qa_fail(
+    request: Request,
     body: FailReviewRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.fail_review(x_agent_id, body.task_id, body.issues)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/unclaim")
 async def unclaim(
+    request: Request,
     body: UnclaimRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.unclaim(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/resume")
 async def resume(
+    request: Request,
     body: ResumeRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.resume(x_agent_id, body.task_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)
 
 
 @router.post("/i_am_idle")
 async def i_am_idle(
+    request: Request,
     _body: IAmIdleRequest,
     x_agent_id: _AgentIdHeader,
     choreographer: _ChoreographerDep,
 ) -> dict:
     env = await choreographer.i_am_idle(x_agent_id)
-    return env.as_dict()
+    return envelope_to_response(env, request)

roboco/mcp/do_server.py

@@ -14,6 +14,7 @@ from __future__ import annotations
 
 import json
 import os
+import uuid
 from pathlib import Path
 from typing import Any
 
@@ -28,19 +29,32 @@ ORCHESTRATOR_URL = os.environ.get(
 AGENT_ID = os.environ["ROBOCO_AGENT_ID"]
 AGENT_ROLE = os.environ["ROBOCO_AGENT_ROLE"]
 
-_HEADERS = {"X-Agent-ID": AGENT_ID, "X-Agent-Role": AGENT_ROLE}
 _TIMEOUT = 30
 
 mcp = FastMCP("roboco-do")
 log = structlog.get_logger()
 
 
+def _build_headers() -> dict[str, str]:
+    """Build per-call headers including a fresh X-Correlation-ID.
+
+    Mirrors flow_server: each MCP call mints its own correlation id so the
+    orchestrator's middleware can bind it to structlog and the audit row,
+    and the envelope echoes it back to the agent.
+    """
+    return {
+        "X-Agent-ID": AGENT_ID,
+        "X-Agent-Role": AGENT_ROLE,
+        "X-Correlation-ID": str(uuid.uuid4()),
+    }
+
+
 def _post(path: str, body: dict[str, Any]) -> dict[str, Any]:
     """POST a request to the orchestrator and return the JSON envelope."""
     with httpx.Client(timeout=_TIMEOUT) as client:
         response = client.post(
             f"{ORCHESTRATOR_URL}{path}",
-            headers=_HEADERS,
+            headers=_build_headers(),
             json=body,
         )
         response.raise_for_status()

roboco/mcp/flow_server.py

@@ -16,6 +16,7 @@ from __future__ import annotations
 
 import json
 import os
+import uuid
 from pathlib import Path
 from typing import Any
 
@@ -30,19 +31,34 @@ ORCHESTRATOR_URL = os.environ.get(
 AGENT_ID = os.environ["ROBOCO_AGENT_ID"]
 AGENT_ROLE = os.environ["ROBOCO_AGENT_ROLE"]
 
-_HEADERS = {"X-Agent-ID": AGENT_ID, "X-Agent-Role": AGENT_ROLE}
 _TIMEOUT = 30
 
 mcp = FastMCP("roboco-flow")
 log = structlog.get_logger()
 
 
+def _build_headers() -> dict[str, str]:
+    """Build per-call headers including a fresh X-Correlation-ID.
+
+    The agent runtime is the first hop, so we mint a UUID per MCP call.
+    The orchestrator's ``CorrelationIdMiddleware`` will accept this as the
+    inbound id and bind it to the structlog context for the request, so
+    every log line and the audit row carry the same id and the agent
+    receives it back on the envelope.
+    """
+    return {
+        "X-Agent-ID": AGENT_ID,
+        "X-Agent-Role": AGENT_ROLE,
+        "X-Correlation-ID": str(uuid.uuid4()),
+    }
+
+
 def _post(path: str, body: dict[str, Any]) -> dict[str, Any]:
     """POST a request to the orchestrator and return the JSON envelope."""
     with httpx.Client(timeout=_TIMEOUT) as client:
         response = client.post(
             f"{ORCHESTRATOR_URL}{path}",
-            headers=_HEADERS,
+            headers=_build_headers(),
             json=body,
         )
         response.raise_for_status()

roboco/services/gateway/choreographer.py

@@ -146,20 +146,29 @@ class Choreographer:
         return is the only fast path. Audit writes are best-effort —
         failures must NEVER block the verb (the agent's response is the
         contract; the audit row is observability-only).
+
+        Also stashes ``correlation_id`` from the structlog contextvars
+        (bound by ``CorrelationIdMiddleware`` for the inbound request)
+        into the audit row's ``details`` JSONB so post-mortem joins
+        across logs and audit trail are possible.
         """
         if env.error is None:
             return env
+        details: dict[str, Any] = {
+            "verb": verb,
+            "reason": env.error,
+            "message": env.message,
+            "missing": env.missing or [],
+        }
+        cid = structlog.contextvars.get_contextvars().get("correlation_id")
+        if cid is not None:
+            details["correlation_id"] = cid
         try:
             await self.audit.log_event(
                 event_type="gateway.rejected",
                 agent_id=agent_id,
                 task_id=task_id,
-                details={
-                    "verb": verb,
-                    "reason": env.error,
-                    "message": env.message,
-                    "missing": env.missing or [],
-                },
+                details=details,
             )
         except Exception as exc:
             # Audit is best-effort: it must NEVER block the verb. The agent's

roboco/services/gateway/envelope.py

@@ -3,6 +3,13 @@
 Every successful verb returns Envelope.ok(...). Every error returns one of
 Envelope.tracing_gap / invalid_state / not_authorized / not_found. The
 shape is the single contract that MCP servers convert into JSON for agents.
+
+``correlation_id`` is intentionally NOT a constructor argument — it is a
+transport-layer concern stamped post-construction by the route handler
+from ``request.state.correlation_id`` (see
+``api.routes.v2._role_dep.envelope_to_response``). Verb logic must never
+thread it through; doing so would mix request lifecycle into business
+logic.
 """
 
 from __future__ import annotations
@@ -26,6 +33,11 @@ class Envelope:
     message: str | None = None
     remediate: str | None = None
     missing: list[str] | None = None
+    # Stamped post-construction by the route layer from
+    # ``request.state.correlation_id`` (set by ``CorrelationIdMiddleware``).
+    # Carried back to the agent so the same id flows MCP -> API -> agent
+    # and ops can join logs across the full hop.
+    correlation_id: str | None = None
 
     @classmethod
     def ok(
@@ -103,6 +115,7 @@ class Envelope:
             "evidence": self.evidence or {},
             "context_briefing": self.context_briefing,
             "error": self.error,
+            "correlation_id": self.correlation_id,
         }
         if self.error is not None:
             out["message"] = self.message

tests/unit/api/test_correlation_id.py

@@ -0,0 +1,238 @@
+"""End-to-end correlation_id propagation: header -> envelope -> audit row.
+
+Audit F20 surfaced that ``X-Correlation-ID`` was bound to structlog by the
+``CorrelationIdMiddleware`` but never travelled past the API boundary:
+
+* The MCP shims (``flow_server`` / ``do_server``) didn't forward it, so
+  every MCP -> API hop got a fresh server-generated UUID.
+* The Envelope returned to the agent had no slot to carry the id back.
+* The ``audit_log`` rows the choreographer writes had no correlation_id
+  field, so post-mortem joins across logs and audit trail were impossible.
+
+These tests pin the contract:
+
+1. Envelope holds an optional ``correlation_id`` and round-trips it via
+   ``as_dict()``.
+2. The v2 flow route reads ``request.state.correlation_id`` (set by
+   ``CorrelationIdMiddleware``) and stamps it onto the envelope before
+   returning.
+3. Both MCP shims attach an ``X-Correlation-ID`` header on every POST,
+   mirroring how they attach ``X-Agent-ID`` / ``X-Agent-Role``.
+4. The choreographer's ``_emit_rejection`` audit writer pulls the
+   correlation_id from the structlog contextvars (where the middleware
+   binds it) and stuffs it into the audit row's ``details`` dict.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import importlib
+from typing import TYPE_CHECKING, Any
+from unittest.mock import AsyncMock, MagicMock, patch
+from uuid import UUID
+
+import pytest
+import structlog
+from fastapi import FastAPI
+from fastapi.testclient import TestClient
+from roboco.api.deps import get_choreographer
+from roboco.api.middleware import CorrelationIdMiddleware
+from roboco.api.routes.v2.flow_dev import router as flow_dev_router
+from roboco.services.gateway.choreographer import Choreographer, ChoreographerDeps
+from roboco.services.gateway.envelope import Envelope
+
+if TYPE_CHECKING:
+    from types import ModuleType
+
+_HTTP_200 = 200
+_DEV_AGENT_HEADERS = {
+    "X-Agent-ID": "00000000-0000-0000-0000-000000000001",
+    "X-Agent-Role": "developer",
+}
+
+
+# --- Envelope ----------------------------------------------------------------
+
+
+def test_envelope_ok_carries_correlation_id_when_stamped() -> None:
+    """correlation_id is set post-construction by the transport layer."""
+    env = Envelope.ok(status="idle", next="call i_am_idle()")
+    env.correlation_id = "test-id-123"
+    assert env.correlation_id == "test-id-123"
+    assert env.as_dict()["correlation_id"] == "test-id-123"
+
+
+def test_envelope_error_carries_correlation_id_when_stamped() -> None:
+    env = Envelope.invalid_state(message="bad state", remediate="do X first")
+    env.correlation_id = "abc"
+    assert env.correlation_id == "abc"
+    assert env.as_dict()["correlation_id"] == "abc"
+
+
+def test_envelope_correlation_id_defaults_to_none() -> None:
+    env = Envelope.ok(status="idle", next="call i_am_idle()")
+    assert env.correlation_id is None
+    # When None we still emit the key so consumers don't have to special-case.
+    assert env.as_dict()["correlation_id"] is None
+
+
+# --- Route -> Envelope wiring ------------------------------------------------
+
+
+def _build_app() -> tuple[FastAPI, MagicMock]:
+    app = FastAPI()
+    app.add_middleware(CorrelationIdMiddleware)
+    app.include_router(flow_dev_router)
+
+    mock_chore = MagicMock()
+    mock_envelope = Envelope.ok(status="idle", next="...")
+    mock_chore.give_me_work = AsyncMock(return_value=mock_envelope)
+    app.dependency_overrides[get_choreographer] = lambda: mock_chore
+    return app, mock_chore
+
+
+def test_route_stamps_request_correlation_id_onto_envelope() -> None:
+    app, _ = _build_app()
+    client = TestClient(app)
+    r = client.post(
+        "/api/v2/flow/dev/give_me_work",
+        json={},
+        headers={**_DEV_AGENT_HEADERS, "X-Correlation-ID": "trace-xyz"},
+    )
+    assert r.status_code == _HTTP_200
+    assert r.json()["correlation_id"] == "trace-xyz"
+    # Middleware also echoes the header back, so ops can grep for it.
+    assert r.headers["X-Correlation-ID"] == "trace-xyz"
+
+
+def test_route_stamps_generated_correlation_id_when_header_missing() -> None:
+    app, _ = _build_app()
+    client = TestClient(app)
+    r = client.post(
+        "/api/v2/flow/dev/give_me_work",
+        json={},
+        headers=_DEV_AGENT_HEADERS,
+    )
+    assert r.status_code == _HTTP_200
+    body_id = r.json()["correlation_id"]
+    header_id = r.headers["X-Correlation-ID"]
+    # Middleware generates a UUID and binds it. The route must read the
+    # SAME id back from request.state and stamp it onto the envelope.
+    assert body_id is not None
+    assert body_id == header_id
+
+
+# --- MCP shims ---------------------------------------------------------------
+
+
+def _reload_mcp_module(monkeypatch: pytest.MonkeyPatch, dotted: str) -> ModuleType:
+    """Set the env vars MCP servers expect at import-time and reload the module.
+
+    Both servers read AGENT_ID / AGENT_ROLE / ORCHESTRATOR_URL once at
+    import; we have to re-import after monkey-patching so the test sees
+    the patched values. The reload itself is the lazy import — keeping
+    importlib at the top-level keeps PLC0415 happy.
+    """
+    monkeypatch.setenv("ROBOCO_AGENT_ID", "00000000-0000-0000-0000-000000000001")
+    monkeypatch.setenv("ROBOCO_AGENT_ROLE", "developer")
+    monkeypatch.setenv("ROBOCO_ORCHESTRATOR_URL", "http://test-orchestrator:8000")
+    module = importlib.import_module(dotted)
+    return importlib.reload(module)
+
+
+@pytest.fixture
+def flow_module(monkeypatch: pytest.MonkeyPatch) -> ModuleType:
+    return _reload_mcp_module(monkeypatch, "roboco.mcp.flow_server")
+
+
+@pytest.fixture
+def do_module(monkeypatch: pytest.MonkeyPatch) -> ModuleType:
+    return _reload_mcp_module(monkeypatch, "roboco.mcp.do_server")
+
+
+def _fake_client(payload: dict[str, Any]) -> MagicMock:
+    fake_response = MagicMock()
+    fake_response.json.return_value = payload
+    fake_client = MagicMock()
+    fake_client.__enter__ = MagicMock(return_value=fake_client)
+    fake_client.__exit__ = MagicMock(return_value=False)
+    fake_client.post.return_value = fake_response
+    return fake_client
+
+
+def test_flow_server_attaches_correlation_id_header(
+    flow_module: ModuleType,
+) -> None:
+    fake = _fake_client({"status": "idle"})
+    with patch("httpx.Client", return_value=fake):
+        flow_module.give_me_work()
+    _args, kwargs = fake.post.call_args
+    headers = kwargs["headers"]
+    assert headers["X-Agent-ID"] == "00000000-0000-0000-0000-000000000001"
+    assert headers["X-Agent-Role"] == "developer"
+    assert "X-Correlation-ID" in headers
+    assert headers["X-Correlation-ID"]  # non-empty
+
+
+def test_flow_server_generates_unique_correlation_id_per_call(
+    flow_module: ModuleType,
+) -> None:
+    fake = _fake_client({"status": "idle"})
+    with patch("httpx.Client", return_value=fake):
+        flow_module.give_me_work()
+        flow_module.give_me_work()
+    first = fake.post.call_args_list[0].kwargs["headers"]["X-Correlation-ID"]
+    second = fake.post.call_args_list[1].kwargs["headers"]["X-Correlation-ID"]
+    assert first != second
+
+
+def test_do_server_attaches_correlation_id_header(
+    do_module: ModuleType,
+) -> None:
+    fake = _fake_client({"status": "noted"})
+    with patch("httpx.Client", return_value=fake):
+        do_module.note("hi")
+    _args, kwargs = fake.post.call_args
+    headers = kwargs["headers"]
+    assert headers["X-Agent-ID"] == "00000000-0000-0000-0000-000000000001"
+    assert headers["X-Agent-Role"] == "developer"
+    assert "X-Correlation-ID" in headers
+    assert headers["X-Correlation-ID"]
+
+
+# --- Audit-row stash ---------------------------------------------------------
+
+
+def test_choreographer_emit_rejection_includes_correlation_id_in_details() -> None:
+    """Audit row's `details` dict carries correlation_id from contextvars."""
+    audit = MagicMock()
+    audit.log_event = AsyncMock()
+    deps = ChoreographerDeps(
+        task=MagicMock(),
+        work_session=MagicMock(),
+        git=MagicMock(),
+        a2a=MagicMock(),
+        journal=MagicMock(),
+        audit=audit,
+        evidence_repo=MagicMock(),
+    )
+    chore = Choreographer(deps)
+
+    bad_env = Envelope.invalid_state(message="oops", remediate="do X")
+    structlog.contextvars.clear_contextvars()
+    structlog.contextvars.bind_contextvars(correlation_id="cid-9")
+    try:
+        asyncio.run(
+            chore._emit_rejection(
+                bad_env,
+                agent_id=UUID("00000000-0000-0000-0000-000000000001"),
+                task_id=None,
+                verb="i_will_work_on",
+            )
+        )
+    finally:
+        structlog.contextvars.clear_contextvars()
+
+    audit.log_event.assert_awaited_once()
+    kwargs = audit.log_event.await_args.kwargs
+    assert kwargs["details"]["correlation_id"] == "cid-9"