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fix(opencode-go): lower Codex-private input items Console Go rejects - #3838

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fix(opencode-go): lower Codex-private input items Console Go rejects#3838
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@jpierrevd jpierrevd commented Sep 7, 2026

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Codex Desktop sends tool declarations as additional_tools input items and inter-agent traffic as agent_message items. Console Go's Responses validator uses a closed item union and rejects the whole request (input[N] did not match any supported type) on the first chained turn with tools, while single-shot turns pass.

Changes

  • Promote additional_tools declarations to top-level tools and drop the items (deduplicated by type/namespace/name), in the existing Go gate next to normalizeOpenCodeGoAgentMessages.
  • Convert mixed plaintext/ciphertext agent_message items to user messages carrying only wire-safe parts. Inter-agent ciphertext can never be decoded by Console Go; all-ciphertext items keep the existing fail-closed path.

Verification

  • New/updated unit tests: tests/providers/opencode-go-agent-messages.test.ts (24 pass), tests/providers/opencode-go-grok46-responses.test.ts (9 pass); bun run typecheck and bun run privacy:scan clean.
  • End-to-end against the live https://opencode.ai/zen/go/v1 endpoint with a real 70-item Codex replay (14 exec tool calls, compaction + agent traffic): HTTP 400 before, HTTP 200 after, same payload.
  • Full tests/providers + tests/responses suites: remaining failures byte-identical on pristine base (environmental, Kiro/xAI lock + Unicode accounting), zero regressions from this change.

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Summary by CodeRabbit

  • Bug Fixes

    • Improved OpenCode Go request compatibility by safely handling mixed message content and retaining supported text.
    • Moved supported tool declarations to the correct request location, removed duplicates, and excluded unsupported entries.
    • Prevented unsupported or non-text content from being forwarded in affected requests.
    • Preserved empty content and existing request data during normalization.
  • Tests

    • Added coverage for mixed content, tool handling, empty inputs, immutability, and supported request transformations.

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@github-actions github-actions Bot added the bug Something isn't working label Sep 7, 2026
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📝 Walkthrough

Walkthrough

OpenCode Go request handling now filters agent-message content to wire-safe parts and promotes embedded additional_tools into top-level tools. The OpenAI Responses adapter applies both normalizers before reasoning-effort mapping. Tests cover filtering, deduplication, immutability, and the updated request shape.

Changes

OpenCode Go request normalization

Layer / File(s) Summary
OpenCode Go normalization rules
src/adapters/opencode-go.ts, src/responses/custom-tool-compat.ts
The adapter retains input_text, input_image, and input_file parts, removes unsupported mixed-content parts, and promotes deduplicated additional_tools into body.tools. customToolWireName is exported for tool identity calculation.
Adapter normalization pipeline
src/adapters/openai-responses.ts
Non-forward OpenCode Go requests apply agent-message and additional-tool normalization before reasoning-effort mapping.
Normalization and integration coverage
tests/providers/opencode-go-agent-messages.test.ts, tests/providers/opencode-go-grok46-responses.test.ts
Tests cover plaintext filtering, mixed content, empty content, immutability, malformed tools, deduplication, promotion, and the updated request shape.

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

Merge Risk: 🟡 Moderate · up to 36cf0

The OpenCode Go compatibility fix should not merge yet: its changed tests cannot parse, and requests containing duplicate existing tools may still be rejected by the upstream validator.

Sequence Diagram(s)

sequenceDiagram
  participant OpenAIResponsesAdapter
  participant normalizeOpenCodeGoAgentMessages
  participant normalizeOpenCodeGoAdditionalTools
  participant RequestTransformer
  OpenAIResponsesAdapter->>normalizeOpenCodeGoAgentMessages: normalize agent messages
  normalizeOpenCodeGoAgentMessages-->>OpenAIResponsesAdapter: filtered request body
  OpenAIResponsesAdapter->>normalizeOpenCodeGoAdditionalTools: normalize additional_tools
  normalizeOpenCodeGoAdditionalTools-->>OpenAIResponsesAdapter: promoted tools and filtered input
  OpenAIResponsesAdapter->>RequestTransformer: map reasoning effort
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Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 9 functions across 5 files. Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title clearly and concisely describes the main change: lowering Codex-private OpenCode Go input items so Console Go accepts the requests. It matches the changes to additional_tools promotion and a…
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@lidge-jun

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리뷰 · 우선순위 66 / 80

이 PR은 Codex Desktop이 OpenCode Console Go(https://opencode.ai/zen/go/v1)로 보낼 때 생기는 400 오류를 고칩니다. 지금 dev HEAD는 bf85e6754(2.46.0 open, #3836 delivery-note privacy scan 직후)이고, 제품 방향은 axis5 표시/CLI 정리와 catalog·provider 쪽입니다. 그래도 OpenCode Go 경로는 그대로 살아 있는 라우팅 축이라, 이 버그는 “문서만”이 아니라 실제 chained turn이 막히는 문제입니다.

증상은 PR 본문대로입니다. Codex Desktop은 도구 선언을 additional_tools input item으로 넣고, 에이전트 간 통신은 agent_message item으로 넣습니다. Console Go의 Responses 검증기는 닫힌(item union)이라 모르는 타입을 만나면 요청 전체를 input[N] did not match any supported type로 거절합니다. 한 번만 보내는 turn은 통과하는데, 도구가 붙은 다음 turn부터 깨지는 패턴입니다. 현재 devsrc/adapters/opencode-go.ts에는 이미 normalizeOpenCodeGoAgentMessages가 있고, src/adapters/openai-responses.ts의 Go 게이트(대략 isOpenCodeGo 분기, forward가 아닐 때)에서 그걸 호출합니다. 다만 지금 구현은 “내용이 전부 plaintext일 때만” agent_message를 user message로 바꿉니다. plaintext와 ciphertext가 섞인 item은 그대로 남겨서 Go가 또 거절합니다. 또 additional_tools item은 parser가 도구 표면으로 모으더라도 outbound body에 item이 남아 Go validator에 걸립니다. 이 PR은 (1) normalizeOpenCodeGoAdditionalToolsadditional_tools를 top-level tools로 올리고 item을 제거하고, (2) mixed agent_message는 wire-safe plaintext만 남긴 user message로 바꾸고, (3) ciphertext만 있는 item은 예전처럼 fail-closed로 둡니다. 호출 위치도 기존 Go 게이트 바로 옆이라 types.ts/config.ts 분리 캠페인에 무효화되지 않습니다. 단위 테스트(tests/providers/opencode-go-agent-messages.test.ts, opencode-go-grok46-responses.test.ts)와 live 70-item replay(400→200) 주장까지 있으면, 방향 자체는 dev에 맞는 실사용 버그픽스입니다.

라인 / 심볼로 본 문제:

enforce-target / ancestry - CI가 wrong ancestry로 실패했고, dev 대비 behind 약 59·ahead 6·diverged입니다. 게이트가 draft로 내린 상태(isDraft: true, merge BLOCKED)라 지금 머지할 수 없습니다. 브랜치 커밋 히스토리에 release promote merge가 섞여 보여서, 깨끗한 rebase가 필요합니다.

src/adapters/opencode-go.ts normalizeOpenCodeGoAdditionalTools / toolIdentityKey - type·name이 없는 malformed tool은 key가 undefined인데도 promoted에 그대로 들어갑니다. 같은 malformed가 여러 번 오면 dedupe 없이 중복 push될 수 있습니다. 드물지만 Go body를 더럽힐 수 있으니, key 없는 tool은 skip하거나 한 번만 넣는 쪽이 안전합니다.

src/adapters/opencode-go.ts namespace vs flat dedupe - identity가 type+namespace+name이라, top-level {type:"custom", name:"exec"}{type:"namespace", name:"functions", tools:[exec]}는 서로 다른 키입니다. Codex Desktop이 namespace 묶음과 flat 선언을 같이 보내면 Go tools에 비슷한 선언이 둘 다 남을 수 있습니다. 의도일 수 있지만, live replay에서 중복 선언이 실제로 안 나오는지 한 줄로 확인하면 좋습니다.

src/adapters/openai-responses.ts Go 게이트 순서 - PR은 normalizeOpenCodeGoAgentMessages 다음에 normalizeOpenCodeGoAdditionalTools를 붙입니다. 순서는 자연스럽습니다. 다만 promotion 이후 hosted-tool drop / namespace lowering이 여전히 top-level tools만 보는지, additional_tools item에만 기대던 옛 테스트 가정이 없는지 opencode-go-grok46-responses 외 경로도 한 번 더 보면 안심입니다. (이 PR이 grok46 테스트를 promote 기대값으로 고친 것은 맞습니다.)

PR 본문 checklist - readiness 네 칸이 전부 비어 있고, quality gate가 draft를 유지합니다. 코드 리뷰와 별개로 게이트를 통과시키려면 checklist + ancestry 회복이 먼저입니다.

관련 이슈 - #2495(native→routed sub-agent plaintext rewrite)와 주제는 닮았지만 범위가 다릅니다. #2495는 일반 routed V2 collaboration feature이고, 이 PR은 Console Go validator가 거절하는 Codex-private item을 Go 게이트에서만 낮춥니다. 같은 PR로 묶지 말고, 필요하면 “Go-only lowering; #2495와 별개”라고만 적어두면 됩니다. #3807(unpaired tool result)과도 다른 축입니다.

메인테이너의 판단이 필요한 지점

  • dev에 깨끗이 rebase한 뒤에도 live 70-item replay(또는 동등한 fixture)를 한 번 더 돌릴지, 유닛만으로 충분한지
  • malformed/namespace vs flat 중복을 “관대히 통과”로 둘지, promote 단계에서 더 세게 걸러낼지
  • OpenCode Go를 쓰는 사용자 볼륨 기준으로 이 픽스를 2.46.0 open-dev에 바로 넣을지, axis5/docs tip 뒤에 둘지

너의 추천
지금 코드 방향은 좋고 dev 무효화 대상도 아닙니다. 다만 ancestry/gate 때문에 머지 불가입니다. 작성자에게 dev 최신(bf85e6754) 위로 rebase(또는 새 브랜치에 픽스 커밋만 cherry-pick) → checklist 체크 → draft 해제 → CI 재통과를 요청하세요. rebase 후 유닛이 그대로 초록이면, malformed tool skip 한 줄만 확인하고 머지해도 됩니다. 우선순위 66은 “실사용 Go 400을 막는 좁은 픽스 + 테스트” 점수이고, ancestry가 정리되면 68~70까지 올려도 됩니다.

이 댓글은 grok-bot이 작성했습니다

Codex Desktop sends tool declarations as additional_tools input items
and inter-agent traffic as agent_message items. Console Go's Responses
validator uses a closed item union and rejects the whole request
(`input[N] did not match any supported type`) on the first chained
turn with tools, while single-shot turns pass.

- Promote additional_tools declarations to top-level tools and drop
  the items (deduplicated by type/namespace/name).
- Convert mixed plaintext/ciphertext agent_message items to user
  messages carrying only wire-safe parts. Inter-agent ciphertext can
  never be decoded by Console Go; all-ciphertext items keep the
  existing fail-closed path.

Verified end-to-end against the live endpoint with a real 70-item
Codex replay: HTTP 400 before, HTTP 200 after.

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Actionable comments posted: 1

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Inline comments:
In `@src/adapters/opencode-go.ts`:
- Line 55: Update the namespace handling around the key deduplication check so
matching namespace containers are merged before deduplicating child
declarations; preserve distinct children from multiple additional_tools entries
sharing the same namespace, then apply child-level deduplication and namespace
lowering. Add a regression case covering two additional_tools items with
different children under the functions namespace, ensuring tool calls remain
preserved.

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Comment thread src/adapters/opencode-go.ts Outdated
- Dedupe promotions by wire identity (customToolWireName), descending
  into namespace groups so flat and grouped declarations of the same
  tool do not double upstream.
- Skip entries without a type/name identity instead of promoting them:
  unmatchable by every downstream pass, guaranteed-400 on Console Go.
- Export customToolWireName for reuse (single-word change).
@jpierrevd
jpierrevd force-pushed the fix/opencode-go-mixed-agent-message branch from 75a05bb to 74e0c56 Compare September 7, 2026 01:40
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Done on this branch (rebased onto dev@bf85e67, ancestry clean):

Local: focused suites green (opencode-go/custom-tool, 100+ tests), typecheck + privacy:scan clean; full-suite remaining failures byte-identical on pristine base (environmental). CI running on the force-push.

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jpierrevd marked this pull request as ready for review September 7, 2026 01:42
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jpierrevd marked this pull request as ready for review September 7, 2026 01:46

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Inline comments:
In `@src/adapters/opencode-go.ts`:
- Line 61: Update the namespace promotion logic around promotedGroups and the
child-selection path to seed an immutable index from existing tools, merge
promoted children into existing namespace containers, and mark each accepted
child in seen so duplicate siblings are emitted only once. Preserve tool-call
serialization and adapter/provider contracts, and add regression coverage for
duplicate children within one namespace and promotion into a namespace already
present in tools.

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Comment thread src/adapters/opencode-go.ts Outdated
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Inline comments:
In `@src/adapters/opencode-go.ts`:
- Line 79: Update the tool normalization logic around claim() and
outTools.push(tool) to build output only from successfully claimed declarations.
Deduplicate flat tools by their identity, and merge namespace declarations into
one container per namespace while retaining only claimed children. Add coverage
for duplicate pre-existing flat tools, namespace children, and namespace
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Comment thread src/adapters/opencode-go.ts Outdated
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Follow-up, second root cause found on the live endpoint: after the item-shape fix, chained turns still fail with reasoning.encrypted_content cannot be used with previous_response_id. Console Go rejects the combination, so the full-history + previous_response_id shape Codex sends can never pass there.

Fix: seed statelessResponses: true on the opencode-go registry entry (same mechanism DeepSeek uses) — the adapter already drops previous_response_id (store=false) and forwards explicit history, which is the shape verified working.

Verification (live, paid endpoint): fresh T1 (high effort, real reasoning blob + function call) then T2 with full history AND previous_response_id together — HTTP 200. Without the flag this exact shape 400s.

This commit only adds the registry seed + a pinning test; no adapter logic changes. Local focused suites green (45 tests), typecheck clean.

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End-to-end validation (Codex CLI harness, isolated CODEX_HOME, production proxy with this patch): (1) parent on opencode-go/muse-spark-1.3-contributor completed a multi-turn read+write tool task; (2) parent on gpt-5.6-luna spawned a spawn_agent worker on opencode-go/muse-spark-1.3-contributor which completed its task. All worker turns HTTP 200 with tool chaining (function calls, file writes); proxy log shows zero 4xx across both runs. Remaining 429s observed separately are provider capacity, not protocol.

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Landed via #3986 at 7b22237

Maintainer carry: #3986 reimplemented the remaining OpenCode Go additional_tools placement + canonical Go stateless continuation intent from this PR (while #3942 already preserved the fail-closed mixed agent_message contract). Closing as superseded/completed under landed-via-maintainer.

이 댓글은 grok-bot이 작성했습니다

@lidge-jun lidge-jun added the landed-via-maintainer Original PR closed after landing via a maintainer merge train label Sep 8, 2026
@lidge-jun lidge-jun closed this Sep 8, 2026
pull Bot pushed a commit to zxfandyy/opencodex that referenced this pull request Sep 8, 2026
Reimplements remaining placement and stateless intent from lidge-jun#3838 at d84e5a8. Preserves the already-landed fail-closed agent-message contract.

Co-authored-by: jpierrevd <265811239+jpierrevd@users.noreply.github.com>
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