Show when a task is parked on a third party

src/panopticon/client.py

@@ -232,6 +232,15 @@ def set_snooze(self, task_id: str, until: str | None) -> JsonObj:
             self._json(self._http.put(f"/tasks/{task_id}/snooze", json={"until": until})),
         )
 
+    def set_waiting_on(self, task_id: str, waiting_on: str | None) -> JsonObj:
+        """Record (or clear, with ``None``) why the task is parked on a third party."""
+        return cast(
+            JsonObj,
+            self._json(
+                self._http.put(f"/tasks/{task_id}/waiting-on", json={"waiting_on": waiting_on})
+            ),
+        )
+
     def set_paused(self, task_id: str, paused: bool) -> JsonObj:
         """Park the task (reaping its container, keeping its session) or bring it back."""
         return cast(

src/panopticon/core/models.py

@@ -27,6 +27,30 @@ class Actor(str, Enum):
     AGENT = "agent"
 
 
+class WaitingOn(str, Enum):
+    """Why a task is parked on a party that is **neither** the user nor the agent.
+
+    Deliberately *not* a third :class:`Actor`. ``turn`` is machine-driven — the container's Stop
+    hook sets it to ``user`` and its UserPromptSubmit hook sets it to ``agent`` on every turn
+    boundary — so a third turn value would be clobbered the moment the agent did anything. And
+    ``Actor`` is load-bearing in the state machine (``turn_on_enter``, ``advanced_by``,
+    responsibility gating), where a third party has no meaning: nothing external ever *advances* a
+    task. This is the separate axis the turn can't carry.
+
+    Also distinct from :attr:`Task.blocked`, which is the **agent's** own declaration that it is
+    stuck and is cleared explicitly. This is **derived** by the session service from the forge and
+    clears itself when the underlying condition does, so the two never need reconciling.
+
+    The point is triage: a task at ``turn=user`` looks actionable, and opening it only to find it's
+    parked on someone else's review is the cost this removes.
+    """
+
+    #: The PR is open and the forge says a review is still required. Nobody here can move it.
+    EXTERNAL_REVIEW = "external-review"
+    #: Checks are still running. Transient, but not actionable while it lasts.
+    CI = "ci"
+
+
 class Status(str, Enum):
     """Resolution status of a single responsibility."""
 
@@ -268,6 +292,12 @@ class Task:
     #: A deliberate "waiting on something" marker the agent sets; it is **orthogonal to the
     #: turn** and survives turn flips (cloude-cade's `:blocked:`), cleared only explicitly.
     blocked: bool = False
+    #: Why this task is parked on a third party (see :class:`WaitingOn`), or ``None`` when it isn't.
+    #: **Derived**, not declared: the session service reads the forge each pass and records what it
+    #: finds, so it clears itself when the PR is approved or the checks go green. The control plane
+    #: never computes it — it has no forge access and stays LLM-free and network-free by design.
+    #: Orthogonal to ``turn`` and to ``blocked``, and touched by neither.
+    waiting_on: WaitingOn | None = None
     #: A brief, one-line reminder of what the task is, collected when the task is created (shown
     #: in the dashboard's task summary) — a human label of *intent*, not a full description (that
     #: lives in the task's plan artifact). Distinct from the ``slug`` (a short identifier the

src/panopticon/migrations/versions/20260925_270851e082e2_add_task_waiting_on.py

@@ -0,0 +1,35 @@
+"""add task waiting_on
+
+Revision ID: 270851e082e2
+Revises: af3f4b8c8271
+Create Date: 2026-09-25 01:46:13.146962
+"""
+
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "270851e082e2"
+down_revision: str | None = "af3f4b8c8271"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table("task", schema=None) as batch_op:
+        batch_op.add_column(sa.Column("waiting_on", sa.String(), nullable=True))
+
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table("task", schema=None) as batch_op:
+        batch_op.drop_column("waiting_on")
+
+    # ### end Alembic commands ###

src/panopticon/sessionservice/host.py

@@ -42,6 +42,7 @@
 from panopticon.sessionservice.images import ImageBuilder
 from panopticon.sessionservice.local_runner import DEFAULT_IMAGE, LocalRunner
 from panopticon.sessionservice.provisioner import Provisioner
+from panopticon.sessionservice.review_watcher import ReviewWatcher
 from panopticon.sessionservice.shell_runner import ShellRunner
 from panopticon.sessionservice.spawner import Spawner
 from panopticon.sessionservice.stall import (
@@ -65,6 +66,7 @@ def __init__(
         provisioner: Provisioner,
         ask_worker: AskWorker | None = None,
         *,
+        review_watcher: ReviewWatcher | None = None,
         stall_monitor: StallMonitor | None = None,
         sleep: Callable[[float], None] = time.sleep,
         interval: float = 2.0,
@@ -73,6 +75,7 @@ def __init__(
         self._spawner = spawner
         self._provisioner = provisioner
         self._ask_worker = ask_worker
+        self._review_watcher = review_watcher
         self._stall_monitor = stall_monitor
         self._sleep = sleep
         self._interval = interval
@@ -113,6 +116,9 @@ def tick(self, tasks: list[JsonObj]) -> None:
                 # After heal: both self-gate, but reaping first would stop a container that heal
                 # then sees sessionless. It skips paused tasks, so the order is belt-and-braces.
                 self._spawner.reap_paused(task)
+                if self._review_watcher is not None:
+                    # Read-only and throttled: no container work, just the forge → triage marker.
+                    self._review_watcher.observe(task)
                 if self._stall_monitor is not None:
                     self._stall_monitor.tick(task)
             except Exception:  # a transient git/REST/FS error on one task must not stall the others
@@ -224,6 +230,7 @@ def run_host(
     )
     provisioner = Provisioner(client, clones_root=tasks_root, git=git, executions=executions)
     ask_worker = AskWorker(client, runner, spawner, runner_id=runner_id)
+    review_watcher = ReviewWatcher(client)
     stall_monitor = StallMonitor(
         client,
         runner,
@@ -240,6 +247,7 @@ def run_host(
         spawner,
         provisioner,
         ask_worker=ask_worker,
+        review_watcher=review_watcher,
         stall_monitor=stall_monitor,
         interval=interval,
         sleep=sleep,

src/panopticon/sessionservice/review_watcher.py

@@ -0,0 +1,163 @@
+"""Derive ``Task.waiting_on`` from the forge (ADR 0008's observe-and-record shape).
+
+The sibling of :class:`~panopticon.sessionservice.provisioner.Provisioner` and
+:class:`~panopticon.sessionservice.ask_worker.AskWorker` for the triage side. The task service
+records *why* a task is parked on a third party but cannot work it out — it has no forge access and
+stays network-free by design. The session service runs where ``gh`` is authenticated, so it owns
+the derivation: each pass it reads the PR of any task that has one and reports what it finds.
+
+**Derived, not declared.** Nothing has to remember to set this and nothing has to remember to clear
+it: when the PR is approved or the checks go green, the next pass reports ``None`` and the marker
+disappears on its own. That is the whole reason this is a watcher rather than an agent skill — a
+skill that forgets to clear leaves a task looking parked forever, which is worse than no marker at
+all, because the operator learns to distrust it.
+
+LLM-free. ``run`` is injectable so the emitted ``gh`` commands are unit-testable without a forge.
+"""
+
+from __future__ import annotations
+
+import json
+import logging
+import time
+from collections.abc import Callable, Sequence
+
+from panopticon.client import JsonObj, TaskServiceClient
+from panopticon.core.git import CommandRunner, _subprocess_run
+from panopticon.core.models import WaitingOn
+from panopticon.core.state import TERMINAL_LABELS
+
+_log = logging.getLogger(__name__)
+
+#: Seconds before a task's PR is re-read. The host daemon wakes on the change feed, not a timer, so
+#: a busy fleet can tick many times a second — without this, each tick would be one `gh` call per
+#: task with a PR. Review state changes on human timescales; a minute of staleness costs nothing.
+POLL_INTERVAL_SECONDS = 60.0
+
+#: Check states that mean CI hasn't finished. Anything else (SUCCESS, FAILURE, …) has concluded —
+#: a *failing* check is not "waiting on CI", it's work for whoever owns the task.
+_PENDING_CHECK_STATES = frozenset({"PENDING", "QUEUED", "IN_PROGRESS", "WAITING", "REQUESTED"})
+
+
+class ReviewWatcher:
+    """Reads each task's PR and records why it's parked, or that it no longer is."""
+
+    def __init__(
+        self,
+        client: TaskServiceClient,
+        *,
+        run: CommandRunner = _subprocess_run,
+        now: Callable[[], float] = time.monotonic,
+        poll_interval: float = POLL_INTERVAL_SECONDS,
+    ) -> None:
+        self._client = client
+        self._run = run
+        self._now = now
+        self._poll_interval = poll_interval
+        #: task id → monotonic time of its last successful read, for the throttle above.
+        self._last_polled: dict[str, float] = {}
+
+    def observe(self, task: JsonObj) -> WaitingOn | None:
+        """Record why ``task`` is parked on a third party, returning what was recorded.
+
+        Self-gating, so the host daemon can call it on every task each pass: a task with no PR, a
+        terminal one, or one polled within :data:`POLL_INTERVAL_SECONDS` is skipped and returns the
+        value already on the task.
+
+        A read failure is **not** treated as "nothing to wait on" — the previously recorded value is
+        left alone. Reporting ``None`` because ``gh`` was rate-limited would quietly mark a parked
+        task as actionable, which is the exact error this feature exists to prevent.
+        """
+        task_id = task["id"]
+        current = task.get("waiting_on")
+        if not task.get("url") or task["state"] in TERMINAL_LABELS:
+            return self._as_enum(current)
+        if task.get("paused"):
+            return self._as_enum(current)  # no container, no triage value — don't spend the call
+        last = self._last_polled.get(task_id)
+        if last is not None and self._now() - last < self._poll_interval:
+            return self._as_enum(current)
+
+        pr = self._read_pr(str(task["url"]))
+        if pr is None:
+            return self._as_enum(current)  # unreadable — keep what we had, don't guess
+        self._last_polled[task_id] = self._now()
+
+        waiting_on = self._derive(pr)
+        if waiting_on != self._as_enum(current):
+            self._client.set_waiting_on(task_id, waiting_on.value if waiting_on else None)
+            _log.info(
+                "task %s: waiting_on %s → %s",
+                task_id,
+                current,
+                waiting_on.value if waiting_on else None,
+            )
+        return waiting_on
+
+    @staticmethod
+    def _as_enum(value: object) -> WaitingOn | None:
+        """The task's recorded value as an enum. Tolerant: an unrecognized string (a newer runner
+        wrote a reason this one doesn't know) reads as ``None`` rather than raising mid-pass."""
+        if not isinstance(value, str):
+            return None
+        try:
+            return WaitingOn(value)
+        except ValueError:
+            return None
+
+    def _read_pr(self, url: str) -> JsonObj | None:
+        """The PR's review + check state, or ``None`` if it can't be read.
+
+        Every failure mode lands here and is swallowed deliberately: `gh` absent, unauthenticated,
+        rate-limited, the URL not being a PR, a network blip. None of those should stall a host
+        pass, and none of them are evidence about the PR.
+        """
+        try:
+            out = self._run(
+                [
+                    "gh",
+                    "pr",
+                    "view",
+                    url,
+                    "--json",
+                    "state,reviewDecision,statusCheckRollup",
+                ],
+                check=False,
+            )
+        except Exception:
+            _log.debug("gh pr view failed for %s", url, exc_info=True)
+            return None
+        try:
+            parsed = json.loads(out)
+        except (ValueError, TypeError):
+            return None  # `gh` printed an error rather than JSON (not a PR, no auth, …)
+        return parsed if isinstance(parsed, dict) else None
+
+    @staticmethod
+    def _derive(pr: JsonObj) -> WaitingOn | None:
+        """Fold the PR's state into a reason, or ``None`` when the ball is ours.
+
+        Precedence is review-before-CI, deliberately. Both mean "not yours", but a required review
+        sits for days while checks resolve in minutes, so the review is the more useful thing to
+        show. Two states that look like waiting but aren't:
+
+        * ``CHANGES_REQUESTED`` — the reviewer has acted and handed it *back*; that is work.
+        * a failing (not pending) check — also work, for the same reason.
+        """
+        if pr.get("state") != "OPEN":
+            return None  # merged or closed — nothing left to wait for
+        if pr.get("reviewDecision") == "REVIEW_REQUIRED":
+            return WaitingOn.EXTERNAL_REVIEW
+        rollup = pr.get("statusCheckRollup")
+        if isinstance(rollup, Sequence) and not isinstance(rollup, str | bytes):
+            for check in rollup:
+                if not isinstance(check, dict):
+                    continue
+                # `status` is the workflow-run field; `state` the commit-status one. A rollup mixes
+                # both kinds, so a check is pending if *either* says so.
+                if (
+                    str(check.get("status") or "").upper() in _PENDING_CHECK_STATES
+                    or str(check.get("state") or "").upper() in _PENDING_CHECK_STATES
+                ):
+                    return WaitingOn.CI
+        return None

src/panopticon/taskservice/api.py

@@ -20,7 +20,16 @@
 from pydantic import BaseModel, ConfigDict, Field
 
 from panopticon.core.artifacts import ArtifactError
-from panopticon.core.models import Actor, Ask, AskStatus, LifecyclePhase, Repo, Status, Task
+from panopticon.core.models import (
+    Actor,
+    Ask,
+    AskStatus,
+    LifecyclePhase,
+    Repo,
+    Status,
+    Task,
+    WaitingOn,
+)
 from panopticon.core.store import AlreadyExists, NotFound, StoreError
 from panopticon.core.workflow import IllegalTransition, InvalidWorkflow, ResponsibilitiesNotMet
 from panopticon.taskservice.service import (
@@ -90,6 +99,7 @@ class TaskSummaryOut(BaseModel):
     url: str | None
     snoozed_until: str | None = None
     paused: bool = False  # operator parked it: container reaped, session + workspace kept
+    waiting_on: WaitingOn | None = None  # parked on a third party (derived from the forge)
     branch: str | None
     clone: str | None
     claimed_by: str | None
@@ -131,6 +141,7 @@ class TaskOut(BaseModel):
         None  # operator-owned attention mute deadline (ISO-8601); None = not snoozed
     )
     paused: bool = False  # operator parked it: container reaped, session + workspace kept
+    waiting_on: WaitingOn | None = None  # parked on a third party (derived from the forge)
     branch: str | None
     clone: str | None
     claimed_by: str | None  # the runner that owns this task (the spawn gate), or None
@@ -349,6 +360,10 @@ class PauseIn(BaseModel):
     paused: bool
 
 
+class WaitingOnIn(BaseModel):
+    waiting_on: WaitingOn | None
+
+
 class SortWeightIn(BaseModel):
     sort_weight: int
 
@@ -742,6 +757,12 @@ async def set_turn(task_id: str, body: TurnIn) -> TaskOut:
     async def set_blocked(task_id: str, body: BlockedIn) -> TaskOut:
         return _task_out(await service.set_blocked(task_id, body.blocked))
 
+    @app.put("/tasks/{task_id}/waiting-on")
+    async def set_waiting_on(task_id: str, body: WaitingOnIn) -> TaskOut:
+        """Record (or clear) why a task is parked on a third party. Reported by the session
+        service, which reads the forge; the control plane has no forge access of its own."""
+        return _task_out(await service.set_waiting_on(task_id, body.waiting_on))
+
     @app.put("/tasks/{task_id}/pause")
     async def set_paused(task_id: str, body: PauseIn) -> TaskOut:
         """Park (or restore) a task. Records the fact only — the session service reaps the