fix(opencode): a command that never calls the model no longer leaves the turn running by juliusmarminge · Pull Request #27378 · pingdotgg/t3code

juliusmarminge · 2026-10-30T04:26:11Z

Problem

On OpenCode 2, a registered slash command whose callback never calls the model left the T3 turn running forever. The thread showed "Working", Stop failed with OpenCode session … had nothing running to stop, and follow-ups were rejected with "is stopping and cannot be steered". Reproduced on main with OpenCode 2.2.2 and a plugin command whose execute does nothing: session.command returns 204, OpenCode starts no execution, and no session.execution.* event ever arrives to end the turn.

Change

After session.command returns, the OpenCode 2 adapter checks whether the command started anything. If an execution start has already been seen, or session.active lists the session, it does nothing: that execution's events end the turn as before. Otherwise it reads the session history past the boundary it recorded before the command. If no user, assistant or idle item is there, nothing ran, and the turn ends as completed (or interrupted, if Stop came in meanwhile). If such an item is there, an execution already ran and its events may still be on the way, so the turn is left to them. If either check fails, the turn stays as it was and a warning is logged.

The opencode2_command replay fixture gains the session.active request and reply the adapter now makes after the command. The frames were added by hand, and the fixture metadata says so.

Scope and approval

Fixes #27348

Verification

Focused tests (apps/server/src/orchestration-v2/Adapters/OpenCode2AdapterV2.test.ts):

finishes a workspace command that never starts an execution: fails on main with the /noop command turn never ended: expected undefined to equal 'completed', passes here.
ends a command from execution events that arrive after its reply: a model-calling command that finishes before its SSE events arrive ends failed from those events, not completed, and offers no continuation. It fails without the history check (expected 'completed' to equal 'failed').
The whole adapter file and OpenCodeReplayFixtures.integration.test.ts pass (107 tests). vp run check:changed passes on the merge with main.

Runtime, real OpenCode (synthetic plugin with noop, which does nothing, and ask, which calls ctx.session.prompt), raw protocol right after the 204:

OpenCode 2.2.2 and 2.0.28, identical:
noop    command=HTTP204  in session.active=False  history after command: []
ask     command=HTTP204  in session.active=True   history: [user, assistant, idle]   events: execution.started, execution.succeeded
review  command=HTTP204  in session.active=True   history: [user, assistant, ...]    events: execution.started

T3 web dev server with OpenCode 2.2.2, fresh database each side:

	main (`c8a606c`)	this branch
`/noop`	Stays "Working" (1m+); Stop logs `ProviderAdapterProtocolError: … had nothing running to stop`; a follow-up is rejected with "is stopping and cannot be steered"	Run completes in about 1 s; a follow-up prompt and `/ask` then run and complete normally, each as a single run

Before/after screenshots are in the first comment below.

Not checked: macOS desktop (the reporter's platform). The fix is in the server adapter and platform-independent. Older OpenCode 2.0.x versions than 2.0.28 were not run.

Model and harness: Claude Opus 5.5 (lead, red test, implementation, review B) and GPT-6.1-Sol (review A), via Claude Code in T3 Code.

🤖 Generated with Claude Code

…ver ends its turn A recognized OpenCode 2 command whose handler never starts an execution returns 204 and emits no session.execution.* events, so the adapter never ends the T3 turn. This test reproduces #27348 and fails on main. Co-Authored-By: Claude Opus 5.5 <[email protected]>

An OpenCode 2 command whose handler never prompts the model returns 204 and emits no session.execution events, so the T3 turn stayed active forever: the thread showed Working, Stop found nothing to stop, and follow-ups were rejected. After session.command returns, the adapter now reads session.active. If OpenCode does not list the session and no execution start was seen, it ends the turn under the event lock (interrupted if Stop was pressed, held behind pending steers like any other completed execution). If the check fails, the turn is left as before for reconnect reconciliation. Co-Authored-By: Claude Opus 5.5 <[email protected]>

A command missing from session.active may still have run an execution whose events trail the HTTP replies. Before ending the turn as completed, read the history newer than the command's boundary: a user, assistant, or idle item means an execution ran, so its own events end the turn. Co-Authored-By: Claude Opus 5.5 <[email protected]>

juliusmarminge · 2026-10-30T04:26:26Z

Runtime captures, T3 web dev server with OpenCode 2.2.2 and a synthetic plugin command /noop (no model call). Before = main c8a606c, after = this branch.

juliusmarminge · 2026-10-30T04:28:05Z

Repro scripts (synthetic, not part of the PR). OpenCode plugin directory registered via { "plugins": ["<dir>"] } in the OpenCode 2 config:

// Synthetic repro plugin: `noop` never calls a model; `ask` hands a prompt to the session.
export default {
  id: "repro-noop-command",
  setup: async (ctx) => {
    await ctx.command.transform((editor) => {
      editor.add({ name: "noop", description: "Completes without a model call", execute: async () => {} });
      editor.add({
        name: "ask",
        description: "Prompts the model",
        execute: async ({ sessionID }) => {
          await ctx.session.prompt({ sessionID, text: "Reply with exactly: HELLO" });
        },
      });
    });
  },
};

Raw protocol driver (session.active and history right after the 204):

#!/usr/bin/env bash
# For each command: POST it, then immediately read session/active; record execution events.
set -u
B=http://127.0.0.1:47348; A="opencode:$(cat /tmp/issue-lead-27348-r1/repro/pw)"
OUT=/tmp/issue-lead-27348-r1/repro/active-$(date +%Y%m%dT%H%M%S); mkdir -p "$OUT"
curl -sN -u "$A" -H 'accept: text/event-stream' "$B/api/event" > "$OUT/events.sse" & SSE=$!
sleep 1
for CMD in noop ask review; do
  SID=$(curl -s -u "$A" -H 'content-type: application/json' -d '{"location":{"directory":"/tmp/issue-lead-27348-r1/repro/project"},"model":{"providerID":"opencode","id":"big-pickle"}}' "$B/api/session" | python3 -c 'import json,sys;print(json.load(sys.stdin)["data"]["id"])')
  CODE=$(curl -s -o /dev/null -w '%{http_code}' -u "$A" -H 'content-type: application/json' -d "{\"name\":\"$CMD\",\"text\":\"\"}" "$B/api/session/$SID/command")
  ACT=$(curl -s -u "$A" "$B/api/session/active")
  echo "$CMD session=$SID command=HTTP$CODE active_immediately=$(echo "$ACT" | python3 -c "import json,sys;print('$SID' in json.load(sys.stdin)['data'])")" | tee -a "$OUT/transcript.txt"
  echo "$SID $CMD" >> "$OUT/sessions"
done
sleep 20; kill $SSE
grep '^data:' "$OUT/events.sse" | sed 's/^data: //' | python3 -c "
import json,sys
names={l.split()[0]:l.split()[1] for l in open('$OUT/sessions')}
for l in sys.stdin:
    try: e=json.loads(l)
    except Exception: continue
    d=e.get('data') or {}
    if isinstance(d,dict) and d.get('sessionID') in names and e['type'].startswith('session.execution'): print(names[d['sessionID']], e['type'])
" | tee -a "$OUT/transcript.txt"
echo "OUT=$OUT"

Transcript, OpenCode 2.2.2:

noop session=ses_e751f25d5ffeNEAaIRJTUfS1zv command=HTTP204 active_immediately=False
ask session=ses_e751f2575ffeUBIt44Qi7OR4nE command=HTTP204 active_immediately=True
review session=ses_e751f24c8ffekypOq7W96Y7TBB command=HTTP204 active_immediately=True
ask session.execution.started
review session.execution.started
ask session.execution.succeeded

Transcript, OpenCode 2.0.28:

noop session=ses_e74f260aeffeJrdF05A01Wy1j0 command=HTTP204 active_immediately=False
ask session=ses_e74f26011ffeL54pKLD6K8DTqy command=HTTP204 active_immediately=True
review session=ses_e74f25f1effe3L8ADJ530e03fl command=HTTP204 active_immediately=True
ask session.execution.started
review session.execution.started
ask session.execution.succeeded

macroscopeapp · 2026-10-30T04:28:13Z

Approvability

Verdict: Approved at 8c3e25a

Macroscope's review found this PR approvable — Commands that never start a model execution now finish their turns instead of remaining running. Active-session and history checks, followed by guarded completion through the existing lifecycle handler, keep the change narrowly scoped.

^{You can add or adjust custom eligibility rules. Learn more.}

github-actions · 2026-10-30T04:30:34Z

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	5.0 KiB	5.0 KiB	0 B (0.0%)	6.8 KiB	✅
Codex	Thread snapshot wire	3.8 KiB	3.8 KiB	0 B (0.0%)	4.9 KiB	✅
Codex	Live turn WebSocket wire	1.2 KiB	1.2 KiB	0 B (0.0%)	2.0 KiB	✅
Codex	Live turn WebSocket decoded	21.5 KiB	21.5 KiB	0 B (0.0%)	24.4 KiB	✅
Codex	Live turn messages	1	1	0 (0.0%)	8	✅
Claude	Total thread wire	5.0 KiB	5.0 KiB	0 B (0.0%)	6.8 KiB	✅
Claude	Thread snapshot wire	3.8 KiB	3.8 KiB	0 B (0.0%)	4.9 KiB	✅
Claude	Live turn WebSocket wire	1.2 KiB	1.2 KiB	0 B (0.0%)	2.0 KiB	✅
Claude	Live turn WebSocket decoded	21.9 KiB	21.9 KiB	0 B (0.0%)	24.4 KiB	✅
Claude	Live turn messages	1	1	0 (0.0%)	8	✅

Baseline: 79bca43 · PR result: 8c3e25a · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

Codex decoded thread snapshot: 108.5 KiB
Claude decoded thread snapshot: 108.8 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

coderabbitai · 2026-10-30T04:34:36Z

No actionable comments were generated in the recent review.

Walkthrough

Recognized OpenCode commands now trigger session activity and history checks. If the session is inactive and no relevant history appears, the adapter completes or interrupts the active, non-busy turn according to its interruption state. Tests cover commands without execution events, delayed execution events, and reconnect reconciliation.

Changes: Command completion

Layer / File(s)	Summary
Command execution reconciliation `packages/provider-opencode/src/server/v2/adapter.ts`, `apps/server/src/orchestration-v2/Adapters/OpenCode2AdapterV2.test.ts`, `apps/server/src/orchestration-v2/testkit/fixtures/opencode2_command/opencode_transcript.ndjson`	The adapter checks session activity and recent history after a recognized command. It settles the active, non-busy turn when no execution evidence appears. Tests cover commands with no execution events, delayed execution events, and a running session during reconnect reconciliation.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix · Severity of issue fixed: Medium

Suggested reviewers: maria-rcks

Merge Risk: Low · up to 8c3e2

The change makes commands that never call a model finish instead of leaving the turn running. A Stop pressed in a very short window after such a command may be reported as completed rather than interrupted. This is a minor pre-existing edge case, so the change is mergeable with owner awareness.

Pre-merge checks: 4

Check name	Status	Explanation
Title check		The title clearly and concisely describes the primary fix: commands that do not call the model no longer leave the turn running.
Description check		The description includes complete Problem, Change, Scope and approval, and Verification sections. It explains the reproduction, implementation, focused tests, runtime checks, limitations, and linked i…
Linked Issues check		Direct issue [`#27348`] requires a registered OpenCode command that does not call a model to end its T3 turn. The adapter records the pre-command history boundary, checks `session.active`, and checks ne…
Out of Scope Changes check		The changed adapter code addresses the command completion path in [`#27348`]. The added tests cover no-execution completion and delayed execution events. The replay fixture adds the `session.active` req…

Full details: Description check

Explanation

The description includes complete Problem, Change, Scope and approval, and Verification sections. It explains the reproduction, implementation, focused tests, runtime checks, limitations, and linked issue. The scope section does not include an explicit maintainer approval comment or a clear explanation for why the fix qualifies as an obvious bug exemption, but the description is otherwise substantially complete.

Full details: Linked Issues check

Explanation

Direct issue [#27348] requires a registered OpenCode command that does not call a model to end its T3 turn. The adapter records the pre-command history boundary, checks session.active, and checks new user, assistant, or idle history. It ends the turn as completed, or as interrupted when Stop arrived. It waits for execution events when activity or post-command history exists. The added no-execution test covers the reported case. The delayed-event test covers model-calling commands whose events arrive after session.command returns. The supplied runtime evidence reports that /noop completes and later actions succeed on OpenCode 2.2.2. Related issue [#24549] is background context and does not add a requirement.

Full details: Out of Scope Changes check

Explanation

The changed adapter code addresses the command completion path in [#27348]. The added tests cover no-execution completion and delayed execution events. The replay fixture adds the session.active request and response required by the adapter check. These changes support the issue and do not show unrelated feature or release work.

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Files selected for processing: 2

`apps/server/src/orchestration-v2/Adapters/OpenCode2AdapterV2.test.ts`

`packages/provider-opencode/src/server/v2/adapter.ts`

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Inline comments:
Review comments at @packages/provider-opencode/src/server/v2/adapter.ts:
- Line 3338: Preserve Stop intent through command reconciliation so the status
selection using turn.interrupted reports “interrupted” when Stop arrives after
session.command returns, even if reconciliation clears the flag or turn.unsent
is already false. Extend the /noop test to cover Stop arriving during this
reconciliation window.

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apps/server/src/orchestration-v2/Adapters/OpenCode2AdapterV2.test.ts
apps/server/src/orchestration-v2/testkit/fixtures/opencode2_command/opencode_transcript.ndjson
packages/provider-opencode/src/server/v2/adapter.ts

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…e-27348 # Conflicts: # apps/server/src/orchestration-v2/Adapters/OpenCode2AdapterV2.test.ts # packages/provider-opencode/src/server/v2/adapter.ts

juliusmarminge · 2026-11-11T01:13:36Z

The automated pipeline stopped on this pull request and will not merge it:

someone else pushed to fix/issue-27348 (head is now bbf95ca); the pipeline does not build on commits it did not review

It stays open for a person to finish or close.

juliusmarminge and others added 4 commits October 30, 2026 03:34

Merge remote-tracking branch 'origin/main' into fix/issue-27348

bbf95ca

github-actions Bot added vouch:trusted Author is trusted by repo permissions or the VOUCHED list. size:M 30-99 changed lines (additions + deletions). labels Oct 30, 2026

macroscopeapp Bot approved these changes Oct 30, 2026

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Comment thread packages/provider-opencode/src/server/v2/adapter.ts Resolved

juliusmarminge added bugfix Fix PR opened by an issue lead; enters the PR loop pr:gate-failed A land gate failed labels Oct 30, 2026

saphid mentioned this pull request Nov 3, 2026

fix(opencode): nested custom commands like /git/commit run as commands #29765

Merged

Merge commit '79bca436b24a6eabb05d3d1a95348ae40d31e713' into fix/issu…

8c3e25a

…e-27348 # Conflicts: # apps/server/src/orchestration-v2/Adapters/OpenCode2AdapterV2.test.ts # packages/provider-opencode/src/server/v2/adapter.ts

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fix(opencode): a command that never calls the model no longer leaves the turn running - #27378

fix(opencode): a command that never calls the model no longer leaves the turn running#27378
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