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feat(loop): continue a stopped run — same objective, a new ceiling, briefed on what already landed (refs #806) - #819

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loop-continue-806
Sep 19, 2026
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Slice (ii) of #806 — "grant more iterations and continue". Items 1, 2 and 3(b) still wait on the owner decision recorded on the issue; this is the half that needed none.

What it does

POST /v1/instances/:id/loop/:runId/continue carries a stopped run's objective onto a new run. Not a resumed invocation: a finished agent_loop_runs row has no live Workflow to grant steps to, and #523's option (b) — checkpoint the OBJECTIVE, not the transcript — means there is no transcript to reanimate. The continuity is the resume note, composed at the start of the new run from what the old one left on the record.

The route is thin on purpose. driver.start() already picks the repo, opens or reuses the session, runs admission and takes the single-flight claim. What the route decides is only:

The lookback is the whole difference from a restart

#806 item 4 asks that this work "even hours later", and RESUME_NOTE_LOOKBACK_MS is six hours — so a Continue pressed the next morning would have started a run briefed on nothing at all. A continue passes CONTINUE_RESUME_LOOKBACK_MS (30 days) through LoopStartInput → the workflow params → pendingCodingResumeNotelastUnfinishedRunForRepo.

It moves the floor only. The predecessor is still the most recent finished run on the repo, judged afterwards, so a verdict in between still ends the note's job. That is also why the note is not pinned to the continued run's id — pinning would skip that check and brief the new run on a checkpoint another run has already consumed.

Console + MCP

Verified

42 new tests — 24 route, 13 console-lib, 3 real-schema lookback, 1 driver threading, 1 workflow wiring.

Mutation-checked: dropping the lookback at any of its three links, the cross-instance guard, the unfinished-run guard or the ceiling default each turns tests red.

Full suite 11,793/11,793; pnpm -r typecheck; biome; docs:drift; all 13 check-*.mjs.

Not verified

No live run. That needs a real run stopped for a resumable reason, followed by Continue — agent_trace on the successor shows whether the note fired and whether the new run built on it.

🤖 Generated with Claude Code

…iling, briefed on what already landed — refs #806

Slice (ii) of #806: "grant more iterations and continue". Items 1, 2 and 3(b) still
wait on the owner decision recorded on the issue; this is the half that needed none.

POST /v1/instances/:id/loop/:runId/continue carries a stopped run's objective onto a
NEW run. It is not a resumed invocation: a finished agent_loop_runs row has no live
Workflow to grant steps to, and #523's option (b) — checkpoint the OBJECTIVE, not the
transcript — means there is no transcript to reanimate. The continuity is the resume
note, composed at the start of the new run from what the old one left on the record.

The route is thin on purpose. driver.start() already picks the repo, opens or reuses
the session, runs admission and takes the single-flight claim; assembling any of that
here would be a second, quieter copy of the start path. What it decides is only: which
runs may be continued (RESUMABLE_STOP_REASONS, refusing everything else with a sentence
naming the next step instead), what the new run starts with (the stopped run's
objective, its repo via its session, its own step cap unless the caller grants more,
clamped by the same #477 account ceiling), and a FRESH budget — #184's rule that every
autonomous entry point admits separately, or one admission funds an unbounded chain.

The lookback is the whole difference from a restart. #806 item 4 asks that this work
"even hours later", and RESUME_NOTE_LOOKBACK_MS is six hours — so a Continue pressed
the next morning would have started a run briefed on nothing at all. A continue passes
CONTINUE_RESUME_LOOKBACK_MS (30 days) through LoopStartInput → the workflow params →
pendingCodingResumeNote → lastUnfinishedRunForRepo. It moves the FLOOR only: the
predecessor is still the most recent FINISHED run on the repo, judged afterwards, so a
verdict in between still ends the note's job. That is also why the note is NOT pinned
to the continued run's id — pinning would skip that check and brief the new run on a
checkpoint another run has already consumed.

Console: a Continue button beside the ending label, offered only after an ending with
no verdict (canContinueRun, pure and tested, with a test that reads the worker's own
RESUMABLE_STOP_REASONS so the two lists cannot drift silently).

MCP: continue_instance_run, beside start_instance_loop. Not part of #613's sweep — the
route is new here, and shipping the console button without a tool would have ADDED a
gap to the ratchet #613 is driving to zero. Parity holds at 29 recorded gaps, unchanged.
Server 0.1.38 → 0.1.39 with its SURFACE_LOCK entry; 196 → 197 registrations.

Verified: 42 new tests (24 route, 13 console-lib, 3 real-schema lookback, 1 driver
threading, 1 workflow wiring). Mutation-checked — dropping the lookback at any of its
three links, the cross-instance guard, the unfinished-run guard or the ceiling default
each turns tests red. Full suite 11,793/11,793; pnpm -r typecheck; biome; docs:drift;
all 13 check-*.mjs.

Not verified: no live run. That needs a real run stopped for a resumable reason,
followed by Continue — agent_trace on the successor shows whether the note fired.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
@serge-ivo
serge-ivo merged commit 1b8cdb4 into main Sep 19, 2026
1 check passed
serge-ivo pushed a commit that referenced this pull request Sep 19, 2026
… one — refs #821

Run cda38e26 opened PR #819 on this repository, whose whole workflow is commit-and-push
to main. The objective told it not to; it did anyway, near its iteration limit. That
instruction was layer 1 of the #314 merge-authority gate, and layer 1 is advisory.

`direct` is a fourth MergePolicy, and it is the MIRROR of `pr` rather than a rung above
it: it PERMITS the trunk — that is the point of it — and forbids `pr.open` instead. The
three existing layers carry it unchanged: the Pilot's prompt is told to push to the
default branch, the instruction screen refuses to relay "open a PR" to the Engine, and an
observed `pr.open` halts the run with an `act.unauthorized` event and a board card.

Layer 2 is the one that sits in front of the actual incident — #819 was opened by an
Engine the Pilot had instructed — and it is deterministic rather than a request.

The default is untouched: DEFAULT_MERGE_POLICY stays `merge`, the repo column still
defaults to '' (inherit), and `merge` and `pr` both still permit opening a pull request.
Migration 0154 only adds the option to the seeded `merge_policy` select, so the console
settings card and MCP `set_instance_settings` both accept it (they validate against the
select's options). There is no schema change — `coding_repos.merge_policy` carries no
CHECK constraint, so a repo override already stored and already resolved.

repo-path-writer's migration walk resolves settingsSchema FIELD ids; 0154 appends an
OPTION to an existing field and provably changes no field, so the parser is taught that
shape rather than having the assertion loosened.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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2 participants