[Fix] Tasks stall when interrupted subtasks resume by zoomote[bot] · Pull Request #1470 · Zoo-Code-Org/Zoo-Code

zoomote · 2026-08-31T21:42:13Z

Created by Roomote. Follow up by mentioning @roomote, in the web UI, or in Discord.

What changed

Isolated native tool-call chunk and argument state by API request so late chunks from an abandoned task cannot contaminate an active task.
Kept LM Studio, OpenRouter, and Qwen Code completion IDs local to each provider stream while preserving upstream reasoning-before-text ordering.
Added parser, Task, and provider overlap regressions covering scoped/default finish reasons, exact parser event ownership, missing IDs, non-tool finish reasons, duplicate finalization, cleanup, and late fragments; provider suites share one typed parser-stream helper.
Extended the lifecycle verification suite with a production-connected parser-scope submodel that exhausts 924 valid two-request interleavings, six actions, and eight semantic landmarks.
Made the parser model runner cross-platform and safe on shared hosts by bundling in a unique private temporary directory with guaranteed cleanup.
Passed all Vitest dependency-related tests to changed-code mutation runs so filename heuristics cannot silently omit valid coverage.
Documented the parser model's state boundaries, invariants, production mapping, limits, and independent relationship to persisted task lifecycle state.

Why this change was made

An overlapping subtask E2E run combined a tool ID and name from one request with arguments from the next request, causing malformed tool execution and a 30-second timeout. The same commit passed on rerun, exposing a real production race behind the flaky timing and motivating an executable regression model for the complete request-scope protocol.

Closes #1468.

Impact

Cancelling, abandoning, or draining one task no longer corrupts another task's streamed native tool call. The verified lifecycle suite now continuously checks request-scoped parser identity, arguments, completion, cleanup, and late-fragment behavior alongside the existing persisted lifecycle and shared-store models.

github-actions · 2026-08-31T21:42:26Z

Review status

This PR was opened by an automated account. A human maintainer must verify the change intent, provenance, and validation before merging.

Current step: Resolve the merge conflicts. The review sequence resumes after the branch is mergeable.

Review-state labels are managed by this workflow; do not edit them manually.

codecov · 2026-08-31T21:47:27Z

Codecov Report

❌ Patch coverage is 98.80952% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/core/task/Task.ts	83.33%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

edelauna · 2026-08-31T23:48:26Z

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📝 Summary

Summary by CodeRabbit

Bug Fixes
- Improved native tool-call streaming so overlapping requests remain isolated and do not mix call IDs or arguments.
- Completion events are emitted only for identified calls that finish with a tool-call completion signal.
- Prevented stale completion events from carrying over between requests or repeated stream completions.
Tests
- Added coverage for concurrent streams, missing call IDs, normal stops, repeated completion signals, and parser state cleanup.
Documentation
- Added documentation describing request-isolation guarantees and verification coverage.

Walkthrough

Changes

The change scopes native tool-call parser state per request, updates Task integration, and changes three providers to emit completion events only for identified tool calls with tool_calls finish reasons. It adds concurrent-stream tests, an exhaustive scope model checker, architecture documentation, and broader Stryker test discovery.

Native tool-call streaming

Layer / File(s)	Summary
Scope parser state `src/core/assistant-message/NativeToolCallParser.ts`, `src/core/assistant-message/__tests__/NativeToolCallParser.spec.ts`	`NativeToolCallParser` stores raw-chunk and streaming state per scope. Cleanup removes empty scope entries. Tests cover compatibility, cleanup, finalization, and interleaved scopes.
Wire request-local task scopes `src/core/task/Task.ts`, `src/core/task/__tests__/Task.spec.ts`	`Task` creates a parser scope and passes it through streaming, parsing, finalization, and cleanup. Concurrent task tests verify isolated assembled tool calls.
Handle provider tool-call completion `src/api/providers/lm-studio.ts`, `src/api/providers/openrouter.ts`, `src/api/providers/qwen-code.ts`, `src/api/providers/__tests__/*`, `src/test-utils/native-tool-call-stream.ts`	Providers track streamed tool-call IDs and emit `tool_call_end` only for `tool_calls` finish reasons. Tests cover missing IDs, normal stops, repeated finishes, and overlapping streams.
Validate scope isolation `scripts/check-native-tool-call-parser-scoping.ts`, `scripts/run-native-tool-call-parser-scoping.mjs`, `package.json`, `docs/architecture/native-tool-call-parser-scoping-model.md`, `docs/architecture/task-lifecycle-model.md`	The model checker exhaustively replays two request scopes and validates ownership, isolation, cleanup, finalization, and late-fragment behavior. The focused check is added to the lifecycle command and documented separately.

Related test discovery

Layer / File(s)	Summary
Use all related test files `scripts/stryker-diff.mjs`, `scripts/stryker-diff.test.mjs`	Stryker now keeps every test file reported by Vitest related-file discovery. Tests cover differently named related files.

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

Merge Risk: ⚪ Minimal · up to 84211

This change scopes native tool-call streaming state to each request and adds coverage for overlapping streams, cleanup, and completion behavior. No concrete merge-blocking risk remains in the supplied evidence.

Sequence Diagram(s)

sequenceDiagram
  participant Task
  participant ProviderStream
  participant NativeToolCallParser
  Task->>NativeToolCallParser: createScope()
  ProviderStream->>Task: tool_call_partial chunks
  Task->>NativeToolCallParser: process chunks with request scope
  NativeToolCallParser-->>Task: scoped parser events
  ProviderStream->>Task: tool_calls finish reason
  Task->>NativeToolCallParser: finalize scoped calls
  NativeToolCallParser-->>Task: isolated tool_use results

🚥 Pre-merge checks | ✅ 4 | ❌ 3

❌ Failed checks (3 warnings)

Check name	Status	Explanation	Resolution
Out of Scope Changes check	⚠️ Warning	Most changes support issue `#1468`, but the scripts/stryker-diff.mjs and scripts/stryker-diff.test.mjs changes alter mutation-test file discovery and address a separate testing concern unrelated to nati…	Remove the Stryker test-discovery changes from this pull request, or link and document a separate approved issue that requires them.
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 15 functions across 15 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.
Regression Evidence	⚠️ Warning	The changed `discoverRelatedTestFiles` behavior lacks focused coverage. The pull request removes `preferDirectTestFiles`, so discovery must return every Vitest-related file. The new test only calls `p…	Add a focused `discoverRelatedTestFiles` test with a fake Vitest executable and JSON report containing both a direct-named test and a differently named related test. Assert that the function returns both normalized paths. Keep the existing …

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the user-visible failure addressed by the request-scoping fix for interrupted subtasks.
Description check	✅ Passed	The description explains the cause, implementation, impact, linked issue, and regression coverage. It does not use every template heading, but it provides the required information in equivalent sectio…
Linked Issues check	✅ Passed	The changes satisfy issue `#1468` by scoping parser state per request, updating Task lifecycle handling, preventing late-fragment contamination, preserving default-scope compatibility, and adding determ…
Trust And Persistence Invariants	✅ Passed	No changed path matches the stated failure conditions. The production diff only scopes in-memory parser state with `WeakMap`s and tracks provider completion IDs in request-local `Set`s; it adds no sec…

Full details: Out of Scope Changes check

Explanation

Most changes support issue #1468, but the scripts/stryker-diff.mjs and scripts/stryker-diff.test.mjs changes alter mutation-test file discovery and address a separate testing concern unrelated to native tool-call request isolation.

Full details: Regression Evidence

Explanation

The changed discoverRelatedTestFiles behavior lacks focused coverage. The pull request removes preferDirectTestFiles, so discovery must return every Vitest-related file. The new test only calls parseVitestTestFiles, which was not changed and already returned every file. That test would pass even if discoverRelatedTestFiles still applied the removed filename filter. The only direct discovery test covers a missing Vitest executable, not returned-file selection.

Resolution

Add a focused discoverRelatedTestFiles test with a fake Vitest executable and JSON report containing both a direct-named test and a differently named related test. Assert that the function returns both normalized paths. Keep the existing launch-error test for its negative branch.

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edelauna · 2026-09-03T02:13:25Z

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In `@package.json`:
- Line 16: Make the parser-scope:model-check package script a single node
invocation by moving esbuild bundling, generated-file execution, cleanup, and
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src/api/providers/__tests__/qwen-code-native-tools.spec.ts
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src/core/assistant-message/__tests__/NativeToolCallParser.spec.ts (1)

297-372: LGTM!

zoomote · 2026-09-03T12:25:04Z

PR #1470 is current through 8421174d9.

Replaced the predictable parser-model bundle path with a unique private temporary directory and guaranteed recursive cleanup.
Consolidated the LM Studio, OpenRouter, and Qwen parser-stream test logic into one typed shared helper without adding parser dependencies to unrelated stream test utilities.
Replied to and resolved both CodeRabbit threads; no review threads remain unresolved.
Local validation passed: parser-scope model checking (924/924 schedules, 6/6 actions, 8/8 landmarks), 48 provider tests, type checking, linting, and the full test suite (7,974 passed, 39 skipped).
All substantive current-head CI checks pass, including Linux and Windows tests, mocked E2E, visual checks, CodeQL, and mutation testing. The PR review gate passes and is awaiting fresh human maintainer/CODEOWNER approval.

Visual proof handoff is blocked with blocker type proof capture timed out; capture was not retried. The shipped changes have no rendered UI surface. Two earlier reconciliation runs failed to strip labels because GitHub returned Resource not accessible by integration; a later reconciliation completed and published the passing review gate, so those failures are historical rather than a code regression.

edelauna · 2026-09-03T22:17:17Z

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coderabbitai · 2026-09-03T22:17:22Z

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Actionable comments posted: 2

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Inline comments:
In `@scripts/run-native-tool-call-parser-scoping.mjs`:
- Line 9: Update the temporary bundle handling around outfile so it creates an
owner-only directory with mkdtemp(), writes the generated bundle inside that
directory, and imports it from there. Ensure the temporary directory is removed
recursively in a finally block, including when bundling or execution fails.

In `@src/api/providers/__tests__/lmstudio-native-tools.spec.ts`:
- Around line 362-384: Move the duplicated collectAndTrack helper into
src/test-utils/stream.ts as a shared typed utility, preserving its
NativeToolCallParser scope creation, tool_call_partial forwarding, chunk
collection, and cleanup behavior. Update all three test suites to import and
reuse the helper, removing their local implementations.

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📒 Files selected for processing (11)

package.json
scripts/run-native-tool-call-parser-scoping.mjs
scripts/stryker-diff.mjs
scripts/stryker-diff.test.mjs
src/api/providers/__tests__/lmstudio-native-tools.spec.ts
src/api/providers/__tests__/openrouter.spec.ts
src/api/providers/__tests__/qwen-code-native-tools.spec.ts
src/api/providers/lm-studio.ts
src/api/providers/qwen-code.ts
src/core/assistant-message/NativeToolCallParser.ts
src/core/assistant-message/__tests__/NativeToolCallParser.spec.ts

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src/api/providers/qwen-code.ts
src/api/providers/__tests__/qwen-code-native-tools.spec.ts
src/api/providers/__tests__/lmstudio-native-tools.spec.ts
src/api/providers/lm-studio.ts
src/api/providers/__tests__/openrouter.spec.ts

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src/api/providers/__tests__/qwen-code-native-tools.spec.ts
src/api/providers/__tests__/lmstudio-native-tools.spec.ts
src/api/providers/__tests__/openrouter.spec.ts
src/core/assistant-message/__tests__/NativeToolCallParser.spec.ts

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scripts/stryker-diff.test.mjs
scripts/run-native-tool-call-parser-scoping.mjs
src/api/providers/qwen-code.ts
scripts/stryker-diff.mjs
src/api/providers/__tests__/qwen-code-native-tools.spec.ts
src/api/providers/__tests__/lmstudio-native-tools.spec.ts
src/api/providers/lm-studio.ts
src/api/providers/__tests__/openrouter.spec.ts
src/core/assistant-message/__tests__/NativeToolCallParser.spec.ts
src/core/assistant-message/NativeToolCallParser.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/qwen-code.ts
src/api/providers/__tests__/qwen-code-native-tools.spec.ts
src/api/providers/__tests__/lmstudio-native-tools.spec.ts
src/api/providers/lm-studio.ts
src/api/providers/__tests__/openrouter.spec.ts
src/core/assistant-message/__tests__/NativeToolCallParser.spec.ts
src/core/assistant-message/NativeToolCallParser.ts

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Files:

scripts/stryker-diff.test.mjs
scripts/run-native-tool-call-parser-scoping.mjs
src/api/providers/qwen-code.ts
scripts/stryker-diff.mjs
src/api/providers/__tests__/qwen-code-native-tools.spec.ts
src/api/providers/__tests__/lmstudio-native-tools.spec.ts
src/api/providers/lm-studio.ts
package.json
src/api/providers/__tests__/openrouter.spec.ts
src/core/assistant-message/__tests__/NativeToolCallParser.spec.ts
src/core/assistant-message/NativeToolCallParser.ts

Add focused tests for UI binding and save behavior, persistence or normalization, and the value returned by `getStateToPostToWebview()`, including true and false/unset cases when defaults could hide omissions.

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Files:

src/api/providers/__tests__/qwen-code-native-tools.spec.ts
src/api/providers/__tests__/lmstudio-native-tools.spec.ts
src/api/providers/__tests__/openrouter.spec.ts
src/core/assistant-message/__tests__/NativeToolCallParser.spec.ts

Fix lint violations in new TypeScript code instead of suppressing them.

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Files:

src/api/providers/qwen-code.ts
src/api/providers/__tests__/qwen-code-native-tools.spec.ts
src/api/providers/__tests__/lmstudio-native-tools.spec.ts
src/api/providers/lm-studio.ts
src/api/providers/__tests__/openrouter.spec.ts
src/core/assistant-message/__tests__/NativeToolCallParser.spec.ts
src/core/assistant-message/NativeToolCallParser.ts

After editing a file, run ESLint with pruning and zero warnings for that relative file, and confirm its suppression count did not increase.

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Files:

src/api/providers/qwen-code.ts
src/api/providers/__tests__/qwen-code-native-tools.spec.ts
src/api/providers/__tests__/lmstudio-native-tools.spec.ts
src/api/providers/lm-studio.ts
src/api/providers/__tests__/openrouter.spec.ts
src/core/assistant-message/__tests__/NativeToolCallParser.spec.ts
src/core/assistant-message/NativeToolCallParser.ts

🔇 Additional comments (16)

src/api/providers/lm-studio.ts (1)

120-120: LGTM!

Also applies to: 143-147

src/api/providers/qwen-code.ts (2)

244-253: LGTM!

Also applies to: 295-297

309-313: 🩺 Stability & Availability

No change needed. Task.ts calls NativeToolCallParser.finalizeRawChunks() when the provider stream ends and emits tool_call_end for every remaining started call, regardless of finishReason.

src/api/providers/__tests__/qwen-code-native-tools.spec.ts (1)

288-325: LGTM!

src/core/assistant-message/NativeToolCallParser.ts (6)

54-90: LGTM!

114-127: LGTM!

Also applies to: 137-137

189-197: LGTM!

212-226: LGTM!

235-245: LGTM!

Also applies to: 257-275, 318-323

337-342: LGTM!

src/core/assistant-message/__tests__/NativeToolCallParser.spec.ts (3)

296-326: LGTM!

328-341: LGTM!

378-453: LGTM!

package.json (1)

16-17: LGTM!

scripts/stryker-diff.mjs (1)

295-308: LGTM!

scripts/stryker-diff.test.mjs (1)

199-216: LGTM!

edelauna · 2026-09-04T02:27:20Z

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coderabbitai · 2026-09-04T02:27:26Z

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edelauna · 2026-09-04T03:25:25Z

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coderabbitai · 2026-09-04T03:25:30Z

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coderabbitai Bot previously approved these changes Aug 31, 2026

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edelauna marked this pull request as ready for review September 1, 2026 00:29

edelauna requested review from JamesRobert20, edelauna, hannesrudolph, navedmerchant and taltas as code owners September 1, 2026 00:29

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Comment thread src/api/providers/__tests__/lmstudio-native-tools.spec.ts Outdated

zoomote Bot force-pushed the fix/native-tool-call-parser-race-189jg1xq3yp5w branch from 51bd89d to 110c15f Compare September 3, 2026 12:55

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roomote and others added 9 commits September 4, 2026 20:25

fix: isolate native tool parser streams (#1468)

8b8a0a2

test(task): model and verify native tool-call stream isolation

ab3ad60

test: harden parser scope verification

8cbfb94

test: satisfy parser mutation gate

f843e37

test: assert provider parser event ownership

9eb4d22

test: exclude equivalent parser cleanup mutation

9b3338a

test: keep parser mutation selection focused

2aae10b

fix: retain all mutation-related tests

b429f4c

fix: address parser model review feedback

2f860b8

edelauna force-pushed the fix/native-tool-call-parser-race-189jg1xq3yp5w branch from 8421174 to 2f860b8 Compare September 5, 2026 00:25

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