fix(webview): batch repeated tool preambles - #1658
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📝 SummarySummary by CodeRabbit
WalkthroughThe change updates chat batching to use the preceding non-ignorable message as context. Repeated identical assistant preambles can be ignored between matching tool requests. Tests cover batching, boundaries, restoration, and rendered file batches. ChangesChat batching
Priority: ➖ Normal Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix · Severity of issue fixed: Medium Suggested reviewers: Merge Risk: ⚪ Minimal · up to The chat batching change is covered for the reported repeated-preamble behavior and its key boundaries, with no remaining actionable merge risk identified. 🚥 Pre-merge checks | ✅ 8✅ Passed checks (8 passed)
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Inline comments:
In `@webview-ui/src/components/chat/__tests__/ChatView.spec.tsx`:
- Line 501: Strengthen the assertion in the test around toolRows[0] by parsing
the tool payload instead of checking only for the "batchFiles" key. Assert that
batchFiles contains both a.ts and b.ts in the expected order, preserving the
test’s existing setup and behavior.
In `@webview-ui/src/utils/batchNearby.ts`:
- Line 56: Update the inner scan in batchNearby to evaluate isBoundary before
isTarget, ensuring items matching both predicates stop merging rather than being
added to the batch. Add a regression test covering overlapping predicates where
both return true.
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📒 Files selected for processing (4)
webview-ui/src/components/chat/__tests__/ChatView.spec.tsxwebview-ui/src/utils/__tests__/batchNearby.spec.tswebview-ui/src/utils/batchNearby.tswebview-ui/src/utils/chatBatchingPredicates.ts
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Require regression coverage at the lowest valid harness with behavior-focused assertions, including relevant negative, error, false/unset, and boundary cases.
⚙️ CodeRabbit configuration file
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webview-ui/src/utils/__tests__/batchNearby.spec.tswebview-ui/src/components/chat/__tests__/ChatView.spec.tsx
Check strict typing and exhaustive behavior across normal, boundary, error, cancellation, retry, and compatibility paths.
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webview-ui/src/utils/__tests__/batchNearby.spec.tswebview-ui/src/utils/chatBatchingPredicates.tswebview-ui/src/components/chat/__tests__/ChatView.spec.tsxwebview-ui/src/utils/batchNearby.ts
Check React state and effect dependencies, cleanup, accessibility, i18n, and light/dark theme behavior.
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webview-ui/src/utils/__tests__/batchNearby.spec.tswebview-ui/src/utils/chatBatchingPredicates.tswebview-ui/src/components/chat/__tests__/ChatView.spec.tsxwebview-ui/src/utils/batchNearby.ts
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webview-ui/src/utils/__tests__/batchNearby.spec.tswebview-ui/src/utils/chatBatchingPredicates.tswebview-ui/src/components/chat/__tests__/ChatView.spec.tsxwebview-ui/src/utils/batchNearby.ts
🪛 GitHub Check: mutation-diff
webview-ui/src/utils/chatBatchingPredicates.ts
[warning] 19-19: Mutation test advisory
webview-ui/src/utils/chatBatchingPredicates.ts:19: 2 mutation test gaps; example: Survived MethodExpression mutant (replacement: batchContext.text). See the job summary for the complete list and resolution guidance.
[warning] 18-18: Mutation test advisory
webview-ui/src/utils/chatBatchingPredicates.ts:18: Survived ConditionalExpression mutant (replacement: true). See the job summary for the complete list and resolution guidance.
[warning] 16-16: Mutation test advisory
webview-ui/src/utils/chatBatchingPredicates.ts:16: 2 mutation test gaps; example: Survived MethodExpression mutant (replacement: msg.text). See the job summary for the complete list and resolution guidance.
[warning] 15-15: Mutation test advisory
webview-ui/src/utils/chatBatchingPredicates.ts:15: Survived ConditionalExpression mutant (replacement: true). See the job summary for the complete list and resolution guidance.
webview-ui/src/utils/batchNearby.ts
[warning] 62-62: Mutation test advisory
webview-ui/src/utils/batchNearby.ts:62: 2 mutation test gaps; example: Survived ConditionalExpression mutant (replacement: true). See the job summary for the complete list and resolution guidance.
[warning] 49-49: Mutation test advisory
webview-ui/src/utils/batchNearby.ts:49: Survived ConditionalExpression mutant (replacement: true). See the job summary for the complete list and resolution guidance.
[warning] 48-48: Mutation test advisory
webview-ui/src/utils/batchNearby.ts:48: NoCoverage UpdateOperator mutant (replacement: contextIndex++). See the job summary for the complete list and resolution guidance.
🔇 Additional comments (2)
webview-ui/src/utils/chatBatchingPredicates.ts (1)
11-22: LGTM!webview-ui/src/utils/__tests__/batchNearby.spec.ts (1)
97-135: LGTM!
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Summary
Fixes #1656
Validation
Note
Validation ran successfully under Node 26.8.2; the repository declares Node 22.23.1.