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fix(task): stage-independent saveClineMessages + finalize open partial tool ask (split 1/6 of #1066) - #1927

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@easonLiangWorldedtech easonLiangWorldedtech commented Oct 5, 2026 •

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U12(1+2) — task save-stage semantics + finalize open partial tool ask

Part of the PR #1066 split (tracking issue #703). Own issue: #1933. Content source of record: 72143527fd33306e5541116093c2cbf803cce9e0..pr-1066-audit).

Why this unit exists: saveClineMessages() reports the message-write stage independently of the metadata/task-history stage, and finalizePartialToolAsk() closes an open partial tool ask by type+text. Planned as two units (U1 stage semantics, U2 finalize); merged because the stage-semantics tests call finalizePartialToolAsk, so the test blocks cannot be split without orphaning them (test-block atomicity). Soft budget overshoot: 481 a+d.

Boundaries

  • base: 72143527fd33
  • head: cf5abe64d
  • content source: 72143527fd33306e5541116093c2cbf803cce9e0..pr-1066-audit (local)

Fidelity (machine-verified)

zdt split verify --contract U12.json --worktree <wt> --head cf5abe64d

Result: PASS — standalone 481 a+d / 3 files (SOFT-OVERSHOOT (rationale required in PR body))

  • src/core/assistant-message/__tests__/presentAssistantMessage-custom-tool.spec.ts: OK (content subset of source)
  • src/core/task/Task.ts: OK (content subset of source)
  • src/core/task/__tests__/Task.spec.ts: OK (content subset of source)

Budget rationale (soft overshoot): see the deviations list

Design contract

Verification (this unit, as pushed)

  • Tests: 218 passed / 5 skipped (narrowest suites: Task.spec, writeToFileTool.spec, presentAssistantMessage-custom-tool.spec, removeClineFromStack-delegation.spec)
  • changed-line coverage: 18 covered / 0 uncovered — PASS
  • ESLint (--prune-suppressions --max-warnings=0): clean on every touched file; suppression counts unchanged
  • No .changeset file, no CHANGELOG edit.

Recreate policy

If the bot stalls on a pre-merge check and the existing head cannot obtain bot review/approval (empty-commit re-trigger attempted and failed), the unit is recreated from the tagged content source of record — never from a per-PR head. At most 1 PR per issue.

Linked issue

Closes #1933 (unit U12 of the #1066 split). Split plan and tracking issue: #703.

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Check persistence and lifecycle invariants: awaited atomic writes, rollback or explicit partial-failure behavior, cross-window state consistency, stale listeners/watchers, cancellation, idempotency, and safe restart/resume without lost or d...

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🔇 Additional comments (1)
src/core/task/__tests__/Task.spec.ts (1)

6161-6161: LGTM!

Also applies to: 6165-6167, 6169-6174, 6176-6182, 6184-6184, 6186-6187, 6189-6204


📝 Summary

Summary by CodeRabbit

  • Bug Fixes
    • Partial tool requests are now reliably marked complete and answered when finalized, with their progress status cleared. The matching request is selected by its text when provided, and updates appear only after the message is saved successfully.
    • Errors updating task history or metadata no longer cause a successful message save to be reported as failed. Webview update errors are logged without undoing finalization.

Walkthrough

Task message persistence now reports message-array write failures separately from later metadata or task-history errors. A new method finalizes a matching partial tool ask, persists it, and updates the webview when persistence succeeds.

Changes

Task persistence and partial tool asks

Layer / File(s) Summary
Separate message and metadata save outcomes
src/core/task/Task.ts, src/core/task/__tests__/Task.spec.ts
saveClineMessages returns false when writing the message array fails. Later metadata or task-history errors are logged without changing that result. Tests cover message-write and metadata-stage failures.
Finalize a matching partial tool ask
src/core/task/Task.ts, src/core/task/__tests__/Task.spec.ts, src/core/assistant-message/__tests__/presentAssistantMessage-custom-tool.spec.ts
finalizePartialToolAsk selects the latest partial tool ask, optionally requiring an exact text match. It marks the ask complete and answered, clears its progress status, persists it, and updates the webview after a successful save. Tests cover selection and persistence or webview-update failures.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant Caller
  participant Task
  participant MessageArrayStorage
  participant Webview
  Caller->>Task: finalizePartialToolAsk(text?)
  Task->>Task: Select and finalize partial tool ask
  Task->>MessageArrayStorage: saveClineMessages()
  MessageArrayStorage-->>Task: Message-array save result
  Task->>Webview: updateClineMessage()
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Merge Risk: ⚪ Minimal · up to cf920

This change makes message-save failures reported separately from later metadata errors and adds a way to finalize a partial tool ask. The supplied evidence shows no actionable merge risk.

🚥 Pre-merge checks | ✅ 7 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Regression Evidence ⚠️ Warning The metadata-derivation failure path lacks focused coverage. saveClineMessages() now catches failures from taskMetadata() and treats the message write as successful (Task.ts:1707–1742), but the … Add a focused Task.spec.ts test that makes taskMetadata() reject after saveTaskMessages() succeeds. Assert that saveClineMessages() reports success, logs Failed to save task metadata:, and allows finalizePartialToolAsk() to upda…
✅ Passed checks (7 passed)
Check name Status Explanation
Linked Issues check ✅ Passed Issue #1933 requires message-write status to remain independent of metadata and task-history failures, and requires finalization of a matching open partial tool ask. Task.saveClineMessages() returns…
Out of Scope Changes check ✅ Passed The whole-PR diff changes only Task.ts, Task.spec.ts, and presentAssistantMessage-custom-tool.spec.ts, which are within issue #1933's stated scope. The production changes implement the required …
Security Boundaries ✅ Passed No changed path meets the security failure conditions. In src/core/task/Task.ts, finalizePartialToolAsk only locates a partial tool ask by its type and optional exact text, then updates its saved …
Persistence Integrity ✅ Passed No changed persistence path meets the failure condition. saveClineMessages() awaits the message write and returns false if it fails; it separately catches and logs metadata/history failures while …
Lifecycle Resource Cleanup ✅ Passed No changed lifecycle leak or duplicate-work path is present. The diff changes Task message persistence and adds finalizePartialToolAsk in Task.ts; that method only mutates an existing message, saves i…
Title check ✅ Passed The title clearly identifies the two main changes: stage-independent message saving and finalizing an open partial tool ask. It is somewhat long, but it is specific and related to the changeset.
Description check ✅ Passed The description explains the changes, links issue #1933, and provides test, coverage, lint, and split-verification results. It omits some template sections, including the pre-submission checklist and …
Full details: Regression Evidence

Explanation

The metadata-derivation failure path lacks focused coverage. saveClineMessages() now catches failures from taskMetadata() and treats the message write as successful (Task.ts:1707–1742), but the added failure test rejects only updateTaskHistory() (Task.spec.ts:6165–6195). A rejection before history update can therefore regress without a test detecting it.

Resolution

Add a focused Task.spec.ts test that makes taskMetadata() reject after saveTaskMessages() succeeds. Assert that saveClineMessages() reports success, logs Failed to save task metadata:, and allows finalizePartialToolAsk() to update the webview.

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✅ All modified and coverable lines are covered by tests.

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Actionable comments posted: 1


  • 🪄 Fix CodeRabbit comments on this PR
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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @src/core/task/__tests__/Task.spec.ts:
- Around line 6150-6197: Update the “finalizePartialToolAsk still updates the
webview when a later save stage fails” test to isolate its file-backed task
data: remove the persisted ui_messages.json in a finally block, or give the test
a per-test globalStorageUri. Ensure cleanup runs whether assertions pass or
fail.

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🔇 Additional comments (4)
src/core/task/Task.ts (3)

71-71: LGTM!


1681-1742: LGTM!


2735-2784: LGTM!

src/core/assistant-message/__tests__/presentAssistantMessage-custom-tool.spec.ts (1)

92-92: LGTM!

Comment thread src/core/task/__tests__/Task.spec.ts
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…tests

The task uuid is mocked to a fixed value, so the ui_messages.json this save writes outlives the test that
created it. The sibling test below removes the whole directory and recreates it, which is the only reason
the leak has not surfaced: with merge = true, any later save that reads its merged output would fold in a
stale record and fail by run order rather than by behavior.

The body now runs in try/finally, removing ui_messages.json and restoring both spies whatever the
assertions do. The spies moved out of the try so the finally can see them.

Local run: 162 passed in Task.spec.ts (the one remaining failure, blocks a truncated write_to_file call
instead of executing it, fails identically at cf5abe6 without this change - local artifact), eslint
clean, no suppression change.
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Fixed at cf9206a42. The body now runs in try/finally: ui_messages.json under the fixed (uuid-mocked)
task id is removed and both spies are restored regardless of how the assertions land. The spies moved out
of the try so the finally can see them.

I kept the shared directory itself in place — the sibling test that removes it recreates it in its own
finally, and other tests in this block persist through the real fs — so the cleanup is scoped to the
record that actually leaks.

Local run: 162 passed in Task.spec.ts; the one other failure ("blocks a truncated write_to_file call
instead of executing it") fails identically at cf5abe64d without this change, so it is a local artifact.

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@easonLiangWorldedtech easonLiangWorldedtech changed the title fix(task): stage-independent saveClineMessages + finalize open partial tool ask (split 1/6 of #1066) fix(task): stage-independent saveClineMessages + finalize open partial tool ask (split 1/6 of #1066) Oct 6, 2026
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@easonLiangWorldedtech easonLiangWorldedtech changed the title fix(task): stage-independent saveClineMessages + finalize open partial tool ask (split 1/6 of #1066) fix(task): stage-independent saveClineMessages + finalize open partial tool ask (split 1/6 of #1066) Oct 6, 2026
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Review-state reconcile trigger: CodeRabbit approved at cf9206a42 (19:14Z) and every required check is green at this head; re-running the label reconciliation for this fork PR.

@github-actions github-actions Bot added the community-approved Fresh community approval on the current head; maintainer review still required label Oct 7, 2026

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[split-1066] U12(1+2) - task save-stage semantics + finalize open partial tool ask

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