feat(api): abort signal support for opencode-go by easonLiangWorldedtech · Pull Request #1652 · Zoo-Code-Org/Zoo-Code

easonLiangWorldedtech · 2026-09-16T03:05:51Z

Wires the external abort signal and per-request timeout into the completePrompt (non-streaming) and createMessage (streaming) paths of the Opencode Go provider. Stacks on the shared-util unit of this split (resolveModelWithAbort in utils/abort-signal.ts).

completePrompt: forwards options?.abortSignal / options?.timeoutMs to all three wire formats (Anthropic /v1/messages, OpenAI chat.completions, and the Responses /v1/responses path); timeoutMs <= 0 omits the SDK timeout option (the SDK treats timeout: 0 as an immediate abort); aborted completions and SDK connection/timeout errors normalize to the provider AbortError.
createMessage: bridges metadata?.abortSignal (Bedrock pattern: pre-aborted guard, { once: true } listener, detached on completion so a task-scoped signal does not accumulate listeners) into a per-request AbortController shared by all three streaming wire formats; model resolution runs inside the shared resolveModelWithAbort cancellation scope (pre-aborted fast-fail, mid-resolution race).
Aborted/timeout requests normalize to the provider AbortError on all three wire formats, both pre-stream and mid-stream; non-abort failures keep the wrapped "Opencode Go completion error:" identity.

Tests:

Ported the reference abort/timeout completePrompt pass-through tests (signal, timeoutMs incl. 0, and no-options backward compatibility) for all three wire formats, plus normalization/identity tests for aborted and timed-out completions.
createMessage bridging tests: pre-aborted signal -> rejects with the standardized AbortError before any request work; abort mid-resolution -> settles on the standardized AbortError before the lookup is released; mid-stream abort on each wire format -> standardized AbortError; detach tests use the reference-identity pattern (the resolution race registers its own listener, so the bridge is the last "abort" registration).

Series and unit

Unit 2/3 of the #1295 split (content source: 62f596c5d); stacks on the shared-util unit.

Part of the abort-signal series (round 1). Builds on #674, #901, #1008. Addresses #404.

Review response (maintainer review of #1295)

The Responses completePrompt catch now has the same abort normalization as the OpenAI path (isRequestAborted(error, options?.abortSignal) || error instanceof APIConnectionTimeoutError -> provider AbortError), pinned by "preserves abort identity on the Responses completion path" and "surfaces Responses request timeouts as an AbortError in completePrompt".
The Responses streaming branch now has a mid-stream catch mirroring the anthropic branch, and streamResponsesMessage has the same pre-stream guard as streamAnthropicMessage (aborted/timeout requests normalize instead of wrapping).
The model-resolution guard/race/normalization lives once in the shared util (resolveModelWithAbort, unit 1/3); opencode-go's pre-aborted fast-fail happens before any catalog/SDK work (pinned: catalog and SDK both uncalled).
The createMessage catch uses the wider isRequestAborted condition (aborted signal, DOM AbortError, SDK APIUserAbortError, exact "Request was aborted." message; name/message checks require a real Error instance).
The detach test asserts reference identity on the last "abort" registration, because the resolution race registers its own listener on the same external signal.

Evidence

vitest: 123/123 passing in the opencode-go suite (154 changed executable lines, all covered)
Local Stryker mutation gate (unit delta vs own base): 209 valid mutants (≤400), 202 killed, 7 directive-ignored (the per-request bridge's unreachable pre-aborted branch plus two inner-guard equivalence proofs — see the equivalence note below), 0 Survived / 0 NoCoverage / 0 Timeout

CodeRabbit fix (post-review)

CodeRabbit's finding on this PR (cleanup terminal paths): the OpenAI branch converted messages and built the request body before its try/finally, so a conversion failure (e.g. an unstringifiable tool input) left the bridged abort listener attached. Fixed:

the conversion and request construction now run inside the same cleanup scope as the Anthropic and Responses branches (listener detaches on conversion failure too); abort normalization for successful/aborted requests is unchanged,
a kill test pins the new terminal path: an unstringifiable tool input propagates unchanged and detaches the bridge listener by reference,
the re-indentation made the gate instrument pre-existing request-construction lines for the first time; their previously unobservable mutants are now kill-tested (R1 tool-result merge shape for preserveReasoning models and the plain shape for non-preserveReasoning models, the includeMaxTokens on/off branches with a ceiling-bounded model, and the parallel_tool_calls default/explicit-false).

Equivalence note (directive proofs)

Two of the directives cover provably-equivalent inner-guard mutants. createMessage wraps the yield* of each streaming generator in an outer catch that applies the identical isRequestAborted check to the same per-request controller signal and re-throws the standardized AbortError. Therefore:

the inner pre-stream guard's condition (Responses path): a mutation of the condition only changes behavior for errors the outer predicate would not catch — but every abort-flavored error that reaches the inner layer implies the controller signal is already aborted (the SDK rejects because the bridged signal aborted), so the outer predicate fires identically and re-standardizes;
the inner guard's provider-name literal: the inner throw's output is itself re-caught by the outer layer, whose predicate matches on the standardized error's own name === "AbortError", so the outer re-standardizes with the correct provider name and the inner literal is unobservable.

The inner layer's unique, kill-tested behavior is the non-abort "Opencode Go completion error:" wrap.

…utils Extend src/api/providers/utils/abort-signal.ts with the abort-signal series helpers used by the gateway providers: - isRequestAborted(error, signal): wider abort detection - an aborted signal, a DOM AbortError, the OpenAI/Anthropic SDK APIUserAbortError (name check), or the exact SDK abort message "Request was aborted." - trusting name/message only on real Error instances so a plain object that merely looks like an abort propagates unchanged - createAbortError(providerName): fresh error satisfying the Task.ts abort contract (name "AbortError", message ending in "aborted") - rejectOnAbort(pending, signal, providerName): settle a signal-less async phase (model discovery) on the provider AbortError when the signal fires first; the abort listener detaches when pending settles - resolveModelWithAbort(fetchModel, signal, providerName): run model resolution inside a cancellation scope - entry fast-fail for a pre-aborted signal, the rejectOnAbort race while the lookup is pending, and normalization of abort-flavored lookup failures; any other resolution failure propagates unchanged Includes direct unit tests for the resolveModelWithAbort cancellation scope (pre-aborted fast-fail, no-signal pass-through, mid-resolution race, abort normalization, non-abort propagation), the isRequestAborted instanceof tightening tests, and the settle-guard test utility. Unit 1/3 of the Zoo-Code-Org#1295 split (content source: 62f596c). Part of the abort-signal series (round 1). Builds on Zoo-Code-Org#674, Zoo-Code-Org#901, Zoo-Code-Org#1008. Addresses Zoo-Code-Org#404.

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103-113: LGTM!

📝 Summary

Summary by CodeRabbit

Bug Fixes
- Opencode Go requests now handle cancellation consistently, including during streaming, and support request timeouts across supported response formats. Canceled or timed-out requests return a standardized abort error.
- Circular data now produces a clear error instead of potentially causing excessive recursion. Repeated references that are not circular continue to be handled.
- Improved Opencode Go handling of tool-result text, parallel tool calls, and token limits across response formats.

Walkthrough

Opencode Go streaming and completion requests now forward abort signals, pass positive timeouts where supported, and normalize abort and timeout failures to AbortError. sanitizeSurrogatesDeep now detects circular traversal paths while still processing shared references.

Changes

Opencode Go cancellation handling

Layer / File(s)	Summary
Streaming cancellation and stream handling `src/api/providers/opencode-go.ts`, `src/api/providers/__tests__/opencode-go.spec.ts`	Streaming requests use per-request abort signals and normalize cancellation errors. Tests cover abort bridging and listener cleanup, plus stream output and message-conversion behavior.
Non-streaming completion cancellation `src/api/providers/opencode-go.ts`, `src/api/providers/__tests__/opencode-go.spec.ts`	Anthropic, Responses, and OpenAI completion requests forward caller signals and positive timeouts. Tests cover timeout omission, cancellation normalization, and completion options.

Surrogate sanitization cycle detection

Layer / File(s)	Summary
Detect circular traversal paths `src/api/transform/sanitize-surrogates.ts`, `src/api/transform/__tests__/sanitize-surrogates.spec.ts`	`sanitizeSurrogatesDeep` throws a circular-structure `TypeError` for cycles on the active traversal path. Tests also verify that shared non-circular references are sanitized.

Priority: ⬇️ Low

Estimated code review effort: 4 (Complex) | ~45 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant Caller
  participant OpencodeGoHandler
  participant ModelCatalog
  participant OpenAIClient
  Caller->>OpencodeGoHandler: createMessage with AbortSignal
  OpencodeGoHandler->>ModelCatalog: resolve model with abort handling
  ModelCatalog-->>OpencodeGoHandler: return model
  OpencodeGoHandler->>OpenAIClient: start stream with internal AbortSignal
  Caller->>OpencodeGoHandler: abort request
  OpencodeGoHandler->>OpenAIClient: abort internal request signal
  OpenAIClient-->>OpencodeGoHandler: stream or cancellation error
  OpencodeGoHandler-->>Caller: stream output or standardized AbortError

Merge Risk: 🔵 Low · up to 3eb63

A canceled non-streaming completion may remain pending until model lookup finishes. This is a limited cancellation-responsiveness gap; account for it before relying on prompt cancellation during lookup.

Security Architecture Review

Security architecture risk: 🔵 Low · up to 3eb63

The change improves cancellation handling and rejects cyclic inputs. Risk is low, but termination of actual network work is not fully established. Non-streaming requests also retain an existing metadata-loading stage that cancellation and request timeouts do not bound.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

inferred — Cancellation state is isolated per streaming invocation. Shared cycle-validation behavior can affect existing provider consumers of tool schemas and nested tool data, but the reviewed changes do not add callers or expand credential authority. Complete transitive consumer coverage is not established.

Trust Boundaries and Controls

observed — MCP tool schemas already pass through the shared sanitizer at outbound request construction. The added cycle guard rejects circular in-memory structures at that existing boundary; it is an input-validity control, not an authentication or tool-execution authorization control.

Resilience and Maintainability Implications

inferred — Signal propagation and cleanup support request-level failure containment, but mocked SDK behavior does not prove termination of production HTTP requests or remote generation. An already-aborted signal reaching an SDK after completion model resolution is therefore not evidence that no network work can occur.

🚥 Pre-merge checks | ✅ 7 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Regression Evidence	⚠️ Warning	Focused coverage is missing for two changed input cases. `sanitizeSurrogatesDeep` now applies cycle detection to arrays and objects, but its cycle test uses only a self-referential object; the array t…	Add a focused test that passes a self-referential array to `sanitizeSurrogatesDeep` and asserts the circular-structure error. Add negative `timeoutMs` tests for all three `completePrompt` wire formats and assert that the SDK options omit `t…

✅ Passed checks (7 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Security Boundaries	✅ Passed	No changed path meets the security failure conditions. The `opencode-go.ts` changes add abort-signal and timeout forwarding, cancellation normalization, and listener cleanup; they do not expose secret…
Persistence Integrity	✅ Passed	No changed persistence path exists. The provider changes forward abort signals and timeouts to SDK requests and yield or return response data. `sanitizeSurrogatesDeep` only transforms input objects an…
Lifecycle Resource Cleanup	✅ Passed	No changed lifecycle path shows a resource leak or duplicate work. `createMessage` removes the bridged abort listener in `finally` for the Anthropic, Responses, and OpenAI branches, including request …
Title check	✅ Passed	The title clearly identifies the main change: adding abort-signal support to the Opencode Go provider.
Description check	✅ Passed	The description explains the implementation across all three wire formats, summarizes test coverage and results, and links the related issue. It provides enough detail for review, though it does not r…

Full details: Regression Evidence

Explanation

Focused coverage is missing for two changed input cases. sanitizeSurrogatesDeep now applies cycle detection to arrays and objects, but its cycle test uses only a self-referential object; the array test covers only a shared, non-cyclic array. A self-referential array therefore has no test for the new circular-structure error. Also, completePrompt omits SDK timeouts for timeoutMs <= 0 on the Anthropic, OpenAI, and Responses paths, but the tests cover 0, positive values, and omitted options—not a negative value. CompletePromptOptions.timeoutMs is a number, and the changed code explicitly defines negative values as disabled timeouts.

Resolution

Add a focused test that passes a self-referential array to sanitizeSurrogatesDeep and asserts the circular-structure error. Add negative timeoutMs tests for all three completePrompt wire formats and assert that the SDK options omit timeout.

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github-actions · 2026-09-16T03:06:48Z

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codecov · 2026-09-16T03:10:53Z

Codecov Report

❌ Patch coverage is 92.47312% with 7 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
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Actionable comments posted: 1

⚠️ Outside the diff (1)

🟡 Minor · completePrompt ignores options.abortSignal during model resolution.

src/api/providers/opencode-go.ts:805
🩺 Stability & Availability | 🟡 Minor | ⚡ Quick win

completePrompt ignores options.abortSignal during model resolution.

Line 805 calls this.resolveModel() without the caller signal. Two gaps follow. A caller that aborts before or during the catalog fetch does not fail fast; the request still starts after resolution completes. An abort-flavored catalog failure propagates raw, because the per-format catches only wrap the SDK call. createMessage already uses resolveModelWithAbort for the same purpose at line 212.
🛠️ Proposed fix
-		const { id: modelId, format, temperature, reasoningEffort, maxTokens } = await this.resolveModel()
+		const { id: modelId, format, temperature, reasoningEffort, maxTokens } = await resolveModelWithAbort(
+			() => this.resolveModel(),
+			options?.abortSignal,
+			"Opencode Go",
+		)
🤖 Prompt for AI Agents
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In `@src/api/providers/opencode-go.ts` at line 805, Update completePrompt to
resolve the model through resolveModelWithAbort using options.abortSignal,
matching createMessage’s existing behavior. Ensure aborts before or during model
resolution fail fast and preserve the expected abort error handling before the
per-format SDK call catches.

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Inline comments:
In `@src/api/providers/opencode-go.ts`:
- Around line 223-233: Ensure the OpenAI format-conversion and
request-construction path is covered by the same cleanup scope as streaming, so
failures from convertToR1Format, convertToOpenAiMessages, or
convertToolsForOpenAI remove abortListener before propagating. Update the
surrounding format dispatch or OpenAI branch while preserving existing abort
behavior for successful requests.

---

Outside diff comments:
In `@src/api/providers/opencode-go.ts`:
- Line 805: Update completePrompt to resolve the model through
resolveModelWithAbort using options.abortSignal, matching createMessage’s
existing behavior. Ensure aborts before or during model resolution fail fast and
preserve the expected abort error handling before the per-format SDK call
catches.

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🔇 Additional comments (4)

src/api/providers/utils/abort-signal.ts (1)

52-65: LGTM!

Also applies to: 80-146

src/api/providers/utils/__tests__/abort-signal.spec.ts (1)

11-96: LGTM!

Also applies to: 98-195, 331-339

src/test-utils/settle-guard.ts (1)

10-26: LGTM!

src/api/providers/__tests__/opencode-go.spec.ts (1)

73-88: LGTM!

Also applies to: 406-485, 488-743, 986-1299, 1528-1584, 1615-1739, 2225-2287

- createMessage: bridge metadata.abortSignal to a per-request AbortController (Bedrock pattern: pre-aborted guard, once-listener, detached on completion so a task-scoped signal does not accumulate listeners); model resolution runs inside the shared resolveModelWithAbort cancellation scope (pre-aborted fast-fail, mid-resolution race) - aborted/timeout requests normalize to the provider AbortError on all three wire formats (anthropic /v1/messages, responses /v1/responses, openai chat completions), both pre-stream and mid-stream; non-abort failures keep the wrapped "Opencode Go completion error:" identity - the OpenAI branch runs message conversion and request construction inside the same cleanup scope as the Anthropic and Responses branches, so a conversion failure (e.g. an unstringifiable tool input) still detaches the bridged abort listener (CodeRabbit fix on this PR) - completePrompt: forwards abortSignal/timeoutMs to all three SDK paths (timeoutMs <= 0 omits the SDK timeout option, since the SDK treats timeout: 0 as an immediate abort); aborted completions and APIConnectionTimeoutError/APITimeoutError normalize to the provider AbortError (series standard) The two inner pre-stream guard mutants (the abort-normalization condition and its provider-name literal) are documented as provably equivalent with mutator-specific Stryker directives: createMessage's outer catch applies the identical isRequestAborted check to the same controller signal and re-standardizes, so the inner layer's only unique behavior is the non-abort completion-error wrap (stays kill-tested). The cleanup-scope re-indentation made the gate instrument pre-existing request-construction lines for the first time; their previously unobservable mutants are kill-tested: R1 tool-result merge shape for preserveReasoning models and the plain shape for non-preserveReasoning models, the includeMaxTokens on/off branches with a ceiling-bounded model, and the parallel_tool_calls default/explicit-false. Unit 2/3 of the Zoo-Code-Org#1295 split (content source: 62f596c); stacks on the shared-util unit. Part of the abort-signal series (round 1). Builds on Zoo-Code-Org#674, Zoo-Code-Org#901, Zoo-Code-Org#1008. Addresses Zoo-Code-Org#404.

…encode-go

…de-go

Zoo-Code-Org#1651 landed, so the shared abort-signal helpers and the settle-guard helper are the single implementations: this branch's duplicate copies are dropped. The deep sanitizer main added recursed without a cycle guard, so a circular tool argument ran to the stack limit instead of failing the way JSON.stringify does. The guard tracks the current path, not every node seen, so a node reached twice under two keys still sanitizes.

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Review comments at @src/api/transform/sanitize-surrogates.ts:
- Line 70: Add a regression test for sanitizeSurrogatesDeep that passes the same
array through two object properties and asserts both results are sanitized
arrays, covering cleanup in the array branch.

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src/api/transform/sanitize-surrogates.ts

[warning] 70-70: Mutation test advisory
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easonLiangWorldedtech · 2026-10-04T05:01:29Z

Conflict resolution against upstream main (3859e5dd8), pushed as c94e6140c.

The duplicated abort-signal.ts and its spec resolve to main's version (#1651 is the single implementation).

One real defect surfaced by the merge: main's sanitizeSurrogatesDeep recursed without a cycle guard, so a circular tool argument ran to the stack limit instead of failing the way JSON.stringify does — which is what this unit's test asserts. The guard now tracks the current path rather than every node seen, so a node reached twice under two keys still sanitizes.

Validation at this head: tsc --noEmit clean, 173 tests green, prettier and eslint clean. Mutation gate on the guard: 27 valid mutants, 23 killed, 3 timeouts, 1 survived — that survivor is a false negative from the Stryker 10 + vitest runtime-activation defect (the coverage map missed the cycle test); running the mutant by hand is killed by reports a cycle instead of recursing to the stack limit. Per-package changed executable lines: 18.

Note on re-requesting review: GitHub's human-reviewer Re-request review button cannot be driven by this token — POST /pulls/<n>/requested_reviewers returns 404 on fork PRs. The push itself is what re-triggers the review request, so a reviewer re-request has to be clicked in the Reviews panel.

The shared-reference test only covered an object, so the array branch's cleanup was not exercised. Passing the same array through two properties covers it: the guard tracks the current path, so a node reached twice is not a cycle.

easonLiangWorldedtech · 2026-10-04T05:04:48Z

Done in 3eb6333ce. The shared-reference test only covered the object branch, so the array branch's path.delete(value) cleanup had no test.

Added the suggested case (same array through two properties). Running the mutant by hand now fails on that test, so the CallExpression advisory at line 70 is covered.

Note on re-requesting review: GitHub's human-reviewer Re-request review cannot be driven by this token (POST /pulls/1652/requested_reviewers returns 404 on fork PRs). The push itself re-triggers the review request, so a re-request has to be clicked in the Reviews panel.

easonLiangWorldedtech · 2026-10-04T05:19:21Z

@coderabbitai full review

Re-review at the current head so the review decision and the label reflect the resolved state: 0 open threads, CI green, prettier/eslint/tsc clean, and the mutation gate clean on the unit delta.

coderabbitai · 2026-10-04T05:20:06Z

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easonLiangWorldedtech requested review from JamesRobert20, edelauna, hannesrudolph, navedmerchant and taltas as code owners September 16, 2026 03:05

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feat(api): abort signal support for opencode-go, unbound, vercel-ai-gateway, zoo-gateway #1295

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Merge branch 'main' into feat/abort-r1-u2-opencode-go

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Merge branch 'main' into feat/abort-r1-u2-opencode-go

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Cover the array branch of the cycle guard

3eb6333

The shared-reference test only covered an object, so the array branch's cleanup was not exercised. Passing the same array through two properties covers it: the guard tracks the current path, so a node reached twice is not a cycle.

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feat(api): abort signal support for opencode-go - #1652

feat(api): abort signal support for opencode-go#1652
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