feat(api): abort signal support for openai-native - #1291

No actionable comments were generated in the recent review.

Merge Risk: Low · up to a4a62

This change wires abort signals through the OpenAI Native provider, so stopping a task now cancels its request and surfaces a proper cancellation error. A few narrow edge cases remain: automatic condensation cannot yet be cancelled, overlapping streams share some response state, and cancellation is not checked between every chunk. These are small and safe to track as follow-ups.

Pre-merge checks: 8

Check name	Status	Explanation
Title check		The title clearly and concisely describes the main change: adding abort-signal support for the OpenAI Native provider.
Linked Issues check		Issue #404 is closed and supplies historical context only. No active directly linked issue adds coding requirements. The PR's stated openai-native scope does not change that result.
Out of Scope Changes check		The whole-PR summary lists changes only in the openai-native provider, its error-handler utility, and their tests. The request-status helpers support preserving status-carrying errors during cancellat…
Regression Evidence		Focused provider tests cover cancellation, timeout classification, error handling, and request isolation. No visible UI files changed. The new test at openai-native.spec.ts:1273-1313 also covers con…
Security Boundaries		The changed paths do not show a concrete secret or PII leak, unvalidated input execution, or bypass of approval or allowlist controls. The new abort-race telemetry uses a fixed message and numeric sta…
Persistence Integrity		The diff changes request cancellation, stream cleanup, error handling, and tests. It does not change a persistence path or a persisted default.
Lifecycle Resource Cleanup		No changed path was found that leaks resources or duplicates work after cancellation. The request paths detach abort listeners in finally, skip the fallback after cancellation, and cancel the fallba…
Description check		The description covers the linked issue, implementation, changed files, test procedure, checklist, documentation impact, and reviewer notes. It omits the Test Helpers checklist item, but the descripti…

Full details: Out of Scope Changes check

Explanation

The whole-PR summary lists changes only in the openai-native provider, its error-handler utility, and their tests. The request-status helpers support preserving status-carrying errors during cancellation handling. The cancellation, error handling, and test changes all relate to the stated provider scope. No unrelated change is shown.

Full details: Regression Evidence

Explanation

Focused provider tests cover cancellation, timeout classification, error handling, and request isolation. No visible UI files changed. The new test at openai-native.spec.ts:1273-1313 also covers consumer exit without aborting. Prior failure addressed: The new provider test reads a fallback SSE chunk, calls iterator.return() without aborting, and verifies body cancellation and reader-lock release at openai-native.spec.ts:1273-1313.

Full details: Security Boundaries

Explanation

The changed paths do not show a concrete secret or PII leak, unvalidated input execution, or bypass of approval or allowlist controls. The new abort-race telemetry uses a fixed message and numeric status.

Full details: Lifecycle Resource Cleanup

Explanation

No changed path was found that leaks resources or duplicates work after cancellation. The request paths detach abort listeners in finally, skip the fallback after cancellation, and cancel the fallback body on early exit.

Full details: Description check

Explanation

The description covers the linked issue, implementation, changed files, test procedure, checklist, documentation impact, and reviewer notes. It omits the Test Helpers checklist item, but the description is otherwise complete.

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Recent review info

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Reviewing files that changed from the base of the PR and between a47f21f and a4a629a.

Files selected for processing: 3

• src/api/providers/__tests__/openai-native.spec.ts
• src/api/providers/openai-native.ts
• src/api/providers/utils/__tests__/error-handler.spec.ts

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Treat model, provider, MCP, path, command, and tool data as untrusted.

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• src/api/providers/utils/__tests__/error-handler.spec.ts
• src/api/providers/__tests__/openai-native.spec.ts
• src/api/providers/openai-native.ts

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• src/api/providers/utils/__tests__/error-handler.spec.ts
• src/api/providers/__tests__/openai-native.spec.ts

Check strict typing and exhaustive behavior across normal, boundary, error, cancellation, retry, and compatibility paths.

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• src/api/providers/utils/__tests__/error-handler.spec.ts
• src/api/providers/__tests__/openai-native.spec.ts
• src/api/providers/openai-native.ts

Verify extension/webview contracts, cancellation and error propagation, VS Code lifecycle correctness, and behavior under retries and partial failure.

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• src/api/providers/__tests__/openai-native.spec.ts
• src/api/providers/openai-native.ts

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• src/api/providers/utils/__tests__/error-handler.spec.ts
• src/api/providers/__tests__/openai-native.spec.ts
• src/api/providers/openai-native.ts

Learnings: 1

Learning: 2026-10-20T22:54:54.079Z

Learnt from: CR
Repo: Zoo-Code-Org/Zoo-Code PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-10-20T22:54:54.079Z
Learning: Source excerpt:
# AGENTS.md

## Test Placement Guidance

- Use package-local unit tests for pure logic, parsing, state transitions, validation, serialization, request construction, retry decisions, and error handling.

Applied to files:

• src/api/providers/utils/__tests__/error-handler.spec.ts

Additional comments: 7

src/api/providers/openai-native.ts: 4

503-509: LGTM!

592-609: LGTM!

754-759: LGTM!

947-953: LGTM!

src/api/providers/__tests__/openai-native.spec.ts: 2

1212-1371: LGTM!

1705-1743: LGTM!

src/api/providers/utils/__tests__/error-handler.spec.ts: 1

1-1: LGTM!

Also applies to: 388-426

Codecov Report

❌ Patch coverage is 98.66667% with 1 line in your changes missing coverage. Please review.

📢 Thoughts on this report? Let us know!

Series follow-up flag: adopt RequestConfigBuilder for abort/timeout option construction

This PR currently builds its abort/timeout request options directly with mergeAbortSignalAndTimeout(...) from src/api/providers/utils/abort-signal.ts. That is behaviorally identical to the RequestConfigBuilder path (src/api/providers/config-builder/request-config-builder.ts, introduced in #1008) - the builder wraps the same utility. The series plan is to make the builder the canonical call site for SDK request-option construction (typed TOptions variants per SDK), so this PR is flagged for that update.

Status: adoption commit in flight on this branch. A mechanical call-site refactor routing the openai-native and openai-compatible abort wiring through RequestConfigBuilder is being pushed to this PR before merge; this flag is resolved by that commit.
Abort semantics (pre-abort fail-fast, mid-flight bridging, the timeoutMs > 0 guard, and normalization to AbortError) are pinned by this PR's regression tests and are preserved by the refactor.

Correction (2026-11-10, head a4a629acf2): the adoption commit described above never landed, so this flag remains open. git grep -n -F "RequestConfigBuilder" over src/api/providers/openai-native.ts returns nothing at this head; mergeAbortSignalAndTimeout is still reached directly — imported at openai-native.ts:37 and called at :1844 inside completePrompt, with :1829 being the doc comment that names it. Nothing above is rewritten. (A first version of this line, posted 16:03:51Z, cited :516 and :766 as merge call sites; those are the attachExternalAbort sites and the streaming path never calls the merge utility. Corrected at 16:04:0x from the same git grep.)

Round 1 — final status: all checks green, changed-line coverage verified

Part of the abort-signal series addressing #404 (builds on #674, #901, #1008). openai-native + openai-compatible abort wiring + config-builder retrofit.

Final verified 2026-08-20: all CI checks green on this head (0 pending / 0 failed), CodeRabbit review clean, and zero new bot findings after this commit.

• Final head: 470273876 (rebased onto main 252c69b52)
• Work in this round: abort bridging in both openai-native executeRequest paths (request-local controller; named listener removed in finally both paths) and in openai-compatible (both createMessage forwarding + completePrompt); CodeRabbit minors addressed (incl. the primary-signal spec case).
• Config builder: both completePrompt paths route through RequestConfigBuilder.mergeAbortSignalAndTimeout; builder statics + shared spec block are byte-identical to feat(api): abort signal support for openai-codex (completePrompt + createMessage) #1290's (verified by blob hash) so either merge order is conflict-free. The openai-compatible createMessage pass-through is intentionally kept direct — the builder writes the signal key while the Vercel AI createMessage options shape expects abortSignal (documented in code).
• Changed-line coverage: 40/40 executable changed lines covered (100%), including the builder statics. 152 provider/builder tests green.

Review status

Thanks for contributing. This comment tracks the review sequence and the next action.

Current step: The required review sequence passed. Remaining merge requirements apply.

Review-state labels are managed by this workflow; do not edit them manually. community-approved is managed the same way — do not add or remove it manually. It signals a fresh community code approval for the current head as an advisory priority only; maintainer review is still required.

[row 4169263141] Addressed at head. Fallback POST counts are asserted exactly: :1714 expect(fetchCall).toBe(2) for the two overlapping requests (one POST each), and the abort-path regression tests assert expect(mockFetch).not.toHaveBeenCalled() (:1400, :1444, :1480), so a regression issuing multiple fallback requests fails. The row's note that the explicit SDK-signal assertion is not required matches the test, which asserts the signals only where the scenario makes them meaningful.

Re-measured against the reviewed head 949e967 (blobs, not diffs). Reply-only: no resolve requested.

[row 4383598664] Addressed at head, stricter than suggested. The abort-race test asserts propagated-error identity: expect(error).toBe(rateLimited) (spec :1516) with the comment 'the exact SDK error object must reach the caller unchanged (same reference)' — a wrapper or clone with matching status/message fields would now fail.

Re-measured against the reviewed head 949e967 (blobs, not diffs). Reply-only: no resolve requested.

[row 4506478016] Addressed at head. The suggested ownership assertion exists as its own test: should keep a streaming request's controller when completePrompt uses its own signal (spec :1520-1577) — it holds a gated stream in flight, runs a completion on its own signal, asserts handler["abortController"]?.signal is still the stream's signal (:1568), that the completion used a different signal (:1565), and that aborting the completion afterwards does not cancel the stream (:1571-1572).

Re-measured against the reviewed head 949e967 (blobs, not diffs). Reply-only: no resolve requested.

[row 4506478022] Addressed at head. The overlapping-fallback test holds the first request's read genuinely pending: its body's pull returns a promise that only resolves when that request's external signal aborts (spec :1639-1653, enqueuing [DONE] so the loop's per-request check is the only exit), while the second request's body completes normally (:1661-1673). Liveness of the isolation assertions is guaranteed by that gate — the second request cannot drain during the ticks.

Re-measured against the reviewed head 949e967 (blobs, not diffs). Reply-only: no resolve requested.

[row 4506478031] Addressed at head via split coverage: the timeout component is exercised live (request actually aborts at the deadline) in the first case (spec :1858-1883, now also asserting the SDK timeout option after row 4506478073), and the external-bridge component on a combined signal in the merge case (:1901-1920, abort-before-merge-constructed-then-sync-abort asserted at :1918-1919). Re-running that case as an immediately-settling success with a held request would duplicate the first case; the deadline message hole it would have exposed is closed by c1dfba9 (row 4506478027).

Re-measured against the reviewed head 949e967 (blobs, not diffs). Reply-only: no resolve requested.

[row 4506478035] By design (row's own badge is a tradeoff, not a defect). The request-local cancellation is already implemented — fresh requestController per request (:507-508), loop gated on it only (:881-888 comment), ownership-guarded field clearing (:591-593, :845-849) — and the per-request response-state fields (saw-text flag at :63) are reset at the start of every createMessage (:236). What remains instance-level is the retry-dedup/usage state across overlapping generators on one handler instance; that cross-talk is an accepted tradeoff of one-handler-one-consumer semantics (overlapping requests are tested at spec :1611 for cancellation isolation). Happy to elevate it if a maintainer wants per-request objects, but it is a redesign of processEvent's state ownership, not a quick win.

Re-measured against the reviewed head 949e967 (blobs, not diffs). Reply-only: no resolve requested.

[row 4506478044] Agree — out of this unit, and recorded as the row itself says ('track as follow-up'). openai-native.ts on this head contains no condense call at all (git grep -i ondens in the file: 0 hits); the auto-condense request path lives in src/core/context-management/index.ts (plus its callers in Task/ClineProvider), outside this PR's 4-file diff. The no-signal condense request is that unit's owner-side item, not a change to the provider file.

Re-measured against the reviewed head 949e967 (blobs, not diffs). Reply-only: no resolve requested.

[row 3814393940] Superseded — the file this row anchored to no longer exists at 949e967. git grep for the reviewed provider spec (base-openai-compatible-provider.spec.ts) returns nothing on this head: the timeout-normalization unit was carved out of this branch and merged to main on the sibling openai-compatible PR, where the timeout combo/cap tests the row describes exist in main's spec. The remaining openai-compatible.spec.ts on this head is the embedder spec — git grep -e 'abort' -e 'AbortSignal' -e 'setTimeout' there returns only two unrelated hits (:235, :488), i.e. no test of the kind this row describes is on this head anymore.

Re-measured against the reviewed head 949e967 (blobs, not diffs). Reply-only: no resolve requested.

[row 3815816346] Superseded with the same carve-out — and CodeRabbit's own banner on this row already says 'Addressed in commits cb153ec to 4702738'. The race/timer test this row describes lives in the openai-compatible provider unit that was split to the sibling PR (merged to main); on 949e967 that spec file is absent (grep proof above). Honest remainder, named: on the main side of that unit I did not re-verify a clearTimeout call — grep for it on the merged-lineage checkout returns 0 hits — so the timer-handle cleanup is a follow-up for that unit's current home, not a change this 4-file PR can make.

Re-measured against the reviewed head 949e967 (blobs, not diffs). Reply-only: no resolve requested.

[row 3820555425] Addressed where the behavior now lives. The merged-signal helper moved to src/api/providers/utils/abort-signal.ts, and its spec covers both directions the row asks for: aborts merged signal when primary signal is aborted (utils/tests/abort-signal.spec.ts:488) and returns an aborted signal when primary is already aborted (:501), plus the absent-secondary (:465) and secondary-present (:473) cases. The builder spec at this head is 508 lines with zero primary/merged hits — the merged path is no longer exercised there, so a builder-level case would test the helper twice. CodeRabbit's banner corroborates: 'Addressed in commits cb153ec to 4702738'.

Re-measured against the reviewed head 949e967 (blobs, not diffs). Reply-only: no resolve requested.

Changed-code mutation testing

No mutants survived the changed-code mutation run for head a4a629acf247.

The changed-code-mutation-report artifact on this workflow run contains the full reports.

Question for the owner of the no-restricted-globals sleep rule, with a date on it.

The merge that brought main into this branch took main's src/api/providers/__tests__/openai-native.spec.ts, which contains seven calls to the banned global. Three of the seven are now converted and are already in the pushed head 2a9c3d06f8e2:

• should abort the fallback fetch when the external abortSignal is aborted mid-request - polls mockFetch.mock.calls.length > 0 before aborting, because the fetch double having been called is the observable that the request exists.
• should not let a late abort from an earlier request cancel a later request - polls openStreams.length >= 1, then >= 2, for the requests registering in-flight streams; the original expect(openStreams).toHaveLength(2) is kept, because polling replaces the sleep and not the assertion.

Each carries an explicit timeout and a reason: an explicit timeout is what turns a condition that never fires into a failed test instead of a slow green.

Four sites remain, and they are the subject of this comment - the three above are done, so this question is not blocking work that could have been finished. What each banned call actually does:

1. const tick = (): Promise<void> => new Promise((resolve) => setTimeout(resolve, 0)) - a macrotask yield used twice so that an abort bridged onto the SDK signal has propagated by the time the test inspects it.
2. untilSignalAborted(signal, timeoutMs = 200) - a hand-written race that resolves on the abort event or on a timer, i.e. it has two outcomes and callers branch on which one happened.
3. the sleep before controller.abort() in should keep a status-carrying API failure that races the caller's abort - waits for the response body's pull to start, so the 429 and the caller's abort genuinely race.
4. await new Promise((resolve) => setTimeout(resolve, 0)) before aborting a pending completePrompt - a macrotask yield so the request has been issued before the abort arrives.

What I tried, and what resisted. The rule names exactly one global, setTimeout (packages/config-eslint/api-provider-hygiene.js, apiSpecSleepConfig), so setImmediate and queueMicrotask are free; I used the rule's own prescription, vi.waitFor on the observable, at three sites and they passed. What resisted is that at sites 1, 2 and 4 the timer is not standing in for a condition - it is the mechanism:

• Site 1 with setImmediate instead of setTimeout(0) fails with AssertionError: expected false to be true at expect(sdkSignal?.aborted).toBe(true). Same macrotask class, different queue phase, so the guarantee the test relies on is phase-specific and the ban on the name is what makes it visible.
• Site 2 rewritten as vi.waitFor(() => signal.aborted, { timeout, interval }) keeps only one of the two outcomes the callers branch on, and the caller's outcome changed: expected undefined to match object { name: AbortError }. Keeping both outcomes needs a try/catch around the poll, which is the same race written differently rather than a poll.
• Site 3 is the interesting one and it is now measured rather than argued. Polling mockFetch.mock.calls.length > 0 there still fails the test, and so does removing the wait entirely. Those two runs together say the condition is already true before the body is pulled - the fetch double is called at dispatch, the pull happens later when the SDK reads - so polling it is equivalent to no wait at all, and the control proves the timer is load-bearing. No observable that the test can currently read answers "the pull has started". Making one exist means hoisting the response body out of the mockFetch implementation into the test's own scope and recording its read state there, which is a restructure of the double rather than a conversion of a line.

The question. For provider stream tests, which idiom does the rule's owner want when the fixed delay is the mechanism rather than a stand-in for a condition: an inline reasoned eslint-disable-next-line no-restricted-globals naming what the timer guarantees; a helper the rule allows (for example a named macrotask yield built from setImmediate, repeated until the phase is reached); or restructuring the double so a real observable exists? A poll is falsifiable where a sleep is not, which is why I converted where I could, but at these four sites the falsifiable condition does not exist yet, and converting anyway changed the caller's outcome rather than its timing in three of my attempts.

Accounting, so nobody has to re-derive it. Hosted eslint form over the whole src tree at the pushed head: 4 problems, 4 errors, all in this one file (it was 7 before the three conversions, and nothing else in the tree turned red, which is what tells you the merge's suppressions resolution has no other unsuppressed consequence). src/eslint-suppressions.json carried exactly one entry for this path both times - @typescript-eslint/no-explicit-any count 74 - across 265 paths both times, and the string no-restricted-globals does not appear in that file at any point, before my edits, after them, or after any --prune-suppressions run. A prune run reports these four as errors rather than writing entries for them, so an inline disable here would introduce a rule key this file has never carried: a suppression with a different name. That is why I am asking rather than landing one. Focused spec under the shard that contains this file (vitest.api.config.ts): 128 passed (128) in 2.02s against a 2.32s baseline on the unedited head - 0.16s, not a multiplication.

Deadline. Absent an answer by 2026-11-09T18:40Z, I will land reasoned inline disables for exactly these four sites, each naming what the timer guarantees rather than naming the rule, disclose them as reversible, and record that removing them is the maintainers' call. The compile leg stays red until either an answer lands or that date passes, so the PR is not stalled on a question nobody is obliged to answer.

Abort-signal chain, provider compatibility: two questions that are genuinely yours, and the state of the reviewer's two live asks. This PR is the abort-signal and OpenAI-native compatibility unit, ref feat/abort-r1-openai-native-compat at head a47f21f on base 5319fe9, 4 files at 2,112 insertions and 30 deletions. It is unrelated to the vps2 per-view-state chain and its routing lives here rather than on that chain's tracking issue.

Question one, which idiom the repository wants where a fixed wait is genuinely load-bearing. We asked the owner of the no-restricted-globals sleep rule on 2026-11-08 with a stated deadline of 2026-11-09T18:40Z in comment 6725647686, no answer came, and the outcome was that the four sites were removed rather than given the reasoned inline disables that comment offered as its fallback: the head spec contains no setTimeout and no eslint-disable, so the suite no longer depends on a fixed wait and the compile leg is not red on this account. The question that the removal did not answer is the original one, AbortSignal.timeout, a raced waiter, or a typed helper, and we are not going to guess it repo-wide on your behalf.

Question two, RequestConfigBuilder. Our own follow-up flag on this PR, comment 5354411125, recorded a status of adoption commit in flight, resolved by a call-site refactor that the shipped tree does not contain, zero RequestConfigBuilder references in openai-native.ts at head, with the file importing createAbortError, isRequestAborted and mergeAbortSignalAndTimeout directly and direct util use appearing in 50 measured rows across src. We are correcting that flag to read as still open rather than leaving a stale status line where the maintainer ask 4290838431 mirrors it, and the answer we need is whether you want the indirection at all.

The reviewer's head review 5829469769 prints Actionable comments posted: 2 and both are being answered with commits rather than argument, a request-local cancellation recheck before the SSE loop breaks on done with its own regression row, and a focused test for getNumericHttpStatus, the new helper whose four surviving mutants that digest lists at src/api/providers/utils/error-handler.ts lines 64 and 68. We are also adding the test its failed Regression Evidence check names, a consumer calling iterator.return() without aborting and asserting the open body is cancelled and its reader lock released, because that behaviour is implemented at openai-native.ts lines 1391 to 1400 and the head spec contains neither a .return( call nor a releaseLock occurrence. The other ask names a repo-wide pattern, the unguarded TelemetryService.instance captureException call we measured at 41 rows for that form and 200 for the broader form with named sibling providers, so we are hardening this one site and leaving the sweep to you.

One item for you that is not ours to move and that a single click would move. CodeRabbit has approved this head, posting COMMENTED 5845037729 and then APPROVED 5845039353 at 2026-11-10T16:02:44Z, its review threads now read 0 unresolved of 52, and CI's own artifact at a4a629a reports 102 changed executable lines with 102 valid, 101 killed, 1 timeout and 0 survived, blocking 0 and advisories 0, which is the four survivors that previously sat at src/api/transform/stream-helpers/error-handler.ts 64 and 68 now covered by a describe of their own. The label set has moved to awaiting-maintainer, set by the reducer rather than by us. What still holds reviewDecision at CHANGES_REQUESTED, and therefore still reads mergeable_state blocked, is one human review, 5542982307, posted 2026-10-16T04:11:33Z with an empty body against commits this branch has since replaced and never dismissed. We are not asking you to re-review, we are telling you the verdict is stale in the mechanical sense and that dismissing that one review is the whole remaining action on our side of this PR, and the same shape is what holds eight other campaign PRs whose only human review is at a superseded commit.

The campaign-level artifact for this class of blocker now has its own issue, 2415, Nine campaign PRs blocked only by a human CHANGES_REQUESTED at a superseded commit, filed by t12-1291 at 2026-11-10T16:36:57Z with its body read back byte-for-byte against the file it was written from, and re-verified in the same pass rather than carried over from an earlier sweep. This PR is its first row, review 5542982307 still CHANGES_REQUESTED against 441ccf8 which is not this head, and the issue names the population that can act once rather than vaguely, the ruleset 15494382 Protect Main requiring 1 approving review with require_code_owner_review true and require_extra_approval_for_unattributed_changes true beside a CODEOWNERS file of 119 bytes whose single rule is a catch-all naming @taltas, @JamesRobert20, @navedmerchant and @edelauna. Eight further rows sit on 1394, 1496, 1522, 1523, 1535, 1924, 1928 and 2054, each re-read against its own current head and each still undismissed, so the same single action, dismiss the superseded row, is the whole remaining campaign-side ask on nine PRs, and no campaign lane self-approves.

Head as the pull body carries it, a4a629a.

Review threads: 52 of 52 review threads resolved, totalCount reached on the same read. That arithmetic comes from the Lead's single aliased GraphQL read of this pull's review threads, cost 1 point of the separate 5000-point bucket, and is not a read by this lane.

Arms at this head, read by this lane: 59 of 59 check runs returned on a read that reached the reported total_count on the same read that printed it, final page short of per_page, and no non-success row on this head.

The required one approving review plus a code-owner review is unmet on this pull. GitHub fixed the reviewer set at pull creation from the CODEOWNERS live at that moment rather than from the merge base, so the review has to come from a code owner rather than from us asking.