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| Layer / File(s) | Summary |
|---|---|
Define and expose read_files packages/types/src/read-files/*, packages/types/src/tool-params.ts, packages/types/src/tool.ts, src/core/prompts/tools/native-tools/*, src/shared/tools.ts, .github/workflows/code-qa.yml, scripts/code-qa-workflow.test.mjs |
Adds the public batch parameter schema and tool name, shared file-reading parameter schemas, native tool registration, tool-registry mappings, provider coverage, and a types-package workflow build step. |
Parse calls and preserve read compatibility src/core/assistant-message/*, src/core/tools/ReadFileTool.ts, src/core/tools/file-reading/ReadFileTool.ts, src/core/tools/file-reading/readLegacyFiles.ts, src/core/tools/file-reading/readFileText.ts, src/core/tools/file-reading/readFileResults.ts, src/integrations/misc/indentation-reader.ts, src/core/mentions/index.ts, src/eslint-suppressions.json |
Validates and dispatches read_files calls. Moves single-file reading into file-reading, retains legacy multi-file handling, and updates result formatting and UTF-8-safe line truncation. |
Execute and bound sequential batches src/core/tools/file-reading/ReadFilesTool.ts, src/core/tools/file-reading/readFileBatch*.ts, src/core/tools/file-reading/clipUtf8.ts, src/core/tools/file-reading/__tests__/*, docs/architecture/bounded-file-batches.md, apps/vscode-e2e/src/fixtures/read-file.ts, apps/vscode-e2e/src/suite/tools/read-files.test.ts, webview-ui/src/components/chat/__tests__/ChatRow.read-files.spec.tsx |
Reads entries in order and combines results within context and 64 KiB output limits. Tests and documentation cover statuses, cancellation, approvals, truncation, compatibility, UI behavior, and end-to-end batch reads. |
Priority: ➖ Normal
Estimated code review effort: 4 (Complex) | ~45 minutes
Change: Feature · Severity of issue fixed: Low
Sequence Diagram(s)
sequenceDiagram
participant NativeToolCallParser
participant presentAssistantMessage
participant ReadFilesTool
participant ReadFileTool
NativeToolCallParser->>presentAssistantMessage: validate read_files entries
presentAssistantMessage->>ReadFilesTool: dispatch batch
ReadFilesTool->>ReadFileTool: read entries sequentially
ReadFileTool-->>ReadFilesTool: return entry results
ReadFilesTool-->>presentAssistantMessage: return bounded batch output
Merge Risk: 🔵 Low · up to 78ef7
The local comparison shows fewer requests but more returned data. Without whole-task timing and model-task error or retry measurements, the end-to-end benefit remains uncertain; keep that validation as a follow-up.
Pre-merge checks | 
✅ Passed checks (8 passed)
| Check name | Status | Explanation |
|---|---|---|
| Linked Issues check |  |
[#1948] The reviewed changes provide bounded read_files batches, sequential per-entry reads and approvals, stable ordered results, context-aware aggregate budgeting with a 64 KiB ceiling, strict-com… |
| Out of Scope Changes check | |
The reader relocation, shared schema, and compatibility adapters support the batch feature and existing read behavior. The tests and architecture note cover its contract. The Unicode clipping fix supp… |
| Regression Evidence | |
Focused coverage is present for the changed reader behavior. ReadFilesTool adds batch validation, sequential processing, cancellation, per-entry approvals, limits, and output budgeting (`src/core/to… |
| Security Boundaries | |
No changed path bypasses file-access controls. NativeToolCallParser validates read_files arguments, and ReadFilesTool.execute validates them again before processing (NativeToolCallParser.ts:756–… |
| Persistence Integrity | |
No changed persistence path introduces a state-loss condition. The new batch executor processes entries sequentially and awaits each read before adding its result (`src/core/tools/file-reading/ReadFil… |
| Lifecycle Resource Cleanup | |
No changed lifecycle path shows a resource leak or duplicate work after cancellation. ReadFilesTool processes entries sequentially and marks remaining entries cancelled after denial or cancellation;… |
| Title check | |
The title clearly identifies the main change: restoring bounded native multi-file reading. It is concise and specific. |
| Description check | |
The description includes the linked issue, implementation details, test procedure, environment information, checklist, documentation impact, limitations, and dependency context. It does not reproduce … |
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Stack/dependency update: #1950 is the reader foundation; this PR is the dependent batch feature and must be reviewed/merged after that foundation. The feature branch has been restacked on the foundation and preserves the final implementation, with additional audited boundary fixes and a clean-build regression fix. There is an access blocker for representing the stack correctly in GitHub: my account has READ permission in the upstream repository, while the foundation branch exists only in my fork. GitHub cannot target a fork branch as the base of an upstream PR. A maintainer can unblock the stacked diff by creating upstream branch Until that base ref exists (or #1950 is merged through the normal review process), this PR's comparison to main necessarily includes the foundation and the executable-line scope job will keep seeing the combined diff. I have not added exclusions, changed limits, disabled checks, or manually changed review-state labels. The individually prepared foundation and feature diffs both fall below the existing 500-line scope limit. The previous compile failure was reproduced on Node 22.23.1 in a clean checkout and fixed by explicitly building runtime types before standalone model checks; the check itself remains enabled. CI and automatic review are being followed on the latest heads. No merge or deployment has been performed. |
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Inline comments:
Review comments at @docs/architecture/bounded-file-batches.md:
- Line 20: Update the `ReadFilesTool.execute()` link in the architecture
document to use a GitHub line fragment (`#L27`) instead of a colon suffix, so
the URL targets the method’s line.
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📒 Files selected for processing (48)
.github/workflows/code-qa.ymlapps/vscode-e2e/src/fixtures/read-file.tsapps/vscode-e2e/src/suite/tools/read-files.test.tsdocs/architecture/bounded-file-batches.mdpackages/types/src/index.tspackages/types/src/read-files/__tests__/read-files-contracts.test.tspackages/types/src/read-files/legacy-read-file-params.tspackages/types/src/read-files/read-files-params.tspackages/types/src/read-files/read-files-tool-name.tspackages/types/src/read-files/read-files.tspackages/types/src/tool-params.tspackages/types/src/tool.tsscripts/code-qa-workflow.test.mjssrc/api/providers/__tests__/openai-codex.spec.tssrc/core/assistant-message/NativeToolCallParser.tssrc/core/assistant-message/__tests__/readFilesParser.spec.tssrc/core/assistant-message/presentAssistantMessage.tssrc/core/mentions/index.tssrc/core/prompts/tools/native-tools/__tests__/read_file.spec.tssrc/core/prompts/tools/native-tools/__tests__/read_files.independence.spec.tssrc/core/prompts/tools/native-tools/__tests__/read_files.spec.tssrc/core/prompts/tools/native-tools/file-reading/__tests__/readFileParameters.spec.tssrc/core/prompts/tools/native-tools/file-reading/readFileParameters.tssrc/core/prompts/tools/native-tools/index.tssrc/core/prompts/tools/native-tools/read_file.tssrc/core/prompts/tools/native-tools/read_files.tssrc/core/tools/ReadFileTool.tssrc/core/tools/file-reading/ReadFileTool.tssrc/core/tools/file-reading/ReadFilesTool.tssrc/core/tools/file-reading/__tests__/readFileBatchBudget.spec.tssrc/core/tools/file-reading/__tests__/readFileBatchEntry.spec.tssrc/core/tools/file-reading/__tests__/readFileResults.spec.tssrc/core/tools/file-reading/__tests__/readFileText.spec.tssrc/core/tools/file-reading/__tests__/readFileTool.spec.tssrc/core/tools/file-reading/__tests__/readFilesTool.spec.tssrc/core/tools/file-reading/clipUtf8.tssrc/core/tools/file-reading/readFileBatchBudget.tssrc/core/tools/file-reading/readFileBatchEntry.tssrc/core/tools/file-reading/readFileBatchOutput.tssrc/core/tools/file-reading/readFileConstants.tssrc/core/tools/file-reading/readFileResults.tssrc/core/tools/file-reading/readFileText.tssrc/core/tools/file-reading/readLegacyFiles.tssrc/eslint-suppressions.jsonsrc/integrations/misc/__tests__/indentation-reader-unicode.spec.tssrc/integrations/misc/indentation-reader.tssrc/shared/tools.tswebview-ui/src/components/chat/__tests__/ChatRow.read-files.spec.tsx
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- src/core/tools/ReadFileTool.ts
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GitHub Actions: Changed-code mutation testing / 0_mutation-diff.txt: feat: restore bounded native multi-file reading (#1948)
Conclusion: failure
##[group]Run BASE_SHA="$(git rev-parse "$HEAD_SHA^1")"
�[36;1mBASE_SHA="$(git rev-parse "$HEAD_SHA^1")"�[0m
�[36;1mnode scripts/stryker-diff.mjs ci --base "$BASE_SHA" --head "$HEAD_SHA"�[0m
shell: /usr/bin/bash -e {0}
env:
PNPM_HOME: /home/runner/setup-pnpm/node_modules/.bin
STORE_PATH: /home/runner/setup-pnpm/node_modules/.bin/store/v10
HEAD_SHA: 17ead5b6ef197c688fcd9194691921de8d16b018
##[endgroup]
Mutation gate failed: extension has 709 changed executable lines (limit 500). Split the PR or obtain a maintainer-reviewed narrow exclusion.
##[error]Process completed with exit code 1.
GitHub Actions: Changed-code mutation testing / mutation-diff: feat: restore bounded native multi-file reading (#1948)
Conclusion: failure
##[group]Run BASE_SHA="$(git rev-parse "$HEAD_SHA^1")"
�[36;1mBASE_SHA="$(git rev-parse "$HEAD_SHA^1")"�[0m
�[36;1mnode scripts/stryker-diff.mjs ci --base "$BASE_SHA" --head "$HEAD_SHA"�[0m
shell: /usr/bin/bash -e {0}
env:
PNPM_HOME: /home/runner/setup-pnpm/node_modules/.bin
STORE_PATH: /home/runner/setup-pnpm/node_modules/.bin/store/v10
HEAD_SHA: 17ead5b6ef197c688fcd9194691921de8d16b018
##[endgroup]
Mutation gate failed: extension has 709 changed executable lines (limit 500). Split the PR or obtain a maintainer-reviewed narrow exclusion.
##[error]Process completed with exit code 1.
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Treat model, provider, MCP, path, command, and tool data as untrusted.
⚙️ CodeRabbit configuration file
Files:
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Reserve end-to-end coverage for behavior that requires the real VS Code host, workspace APIs, extension activation, webview messaging, file watchers, or a full workflow.
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apps/vscode-e2e/src/suite/tools/read-files.test.tsapps/vscode-e2e/src/fixtures/read-file.ts
Check React state and effect dependencies, cleanup, accessibility, i18n, and light/dark theme behavior.
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Require full commit SHA pins, least-privilege permissions, safe expression and shell interpolation, and trusted metadata handling.
⚙️ CodeRabbit configuration file
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.github/workflows/code-qa.yml
Verify extension/webview contracts, cancellation and error propagation, VS Code lifecycle correctness, and behavior under retries and partial failure.
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Files:
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🪛 ast-grep (0.45.3)
apps/vscode-e2e/src/suite/tools/read-files.test.ts
[warning] 17-17: Filesystem path is not a string literal; a request-/variable-derived path can enable path traversal. Validate and normalize the path before use.
Context: fs.writeFile(slicePath, "first\nsecond")
Note: [CWE-22] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
(detect-non-literal-fs-filename-typescript)
[warning] 18-18: Filesystem path is not a string literal; a request-/variable-derived path can enable path traversal. Validate and normalize the path before use.
Context: fs.writeFile(blockPath, "function greet() {\n return 'hello'\n}")
Note: [CWE-22] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
(detect-non-literal-fs-filename-typescript)
src/core/tools/file-reading/readLegacyFiles.ts
[warning] 118-118: Filesystem path is not a string literal; a request-/variable-derived path can enable path traversal. Validate and normalize the path before use.
Context: fs.readFile(fullPath, "utf8")
Note: [CWE-22] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
(detect-non-literal-fs-filename-typescript)
src/core/tools/file-reading/__tests__/readFilesTool.spec.ts
[warning] 30-33: Filesystem path is not a string literal; a request-/variable-derived path can enable path traversal. Validate and normalize the path before use.
Context: fs.writeFile(
path.join(cwd, "source.ts"),
"const header = 1\nfunction example() {\n return header\n}\nconst tail = 2",
)
Note: [CWE-22] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
(detect-non-literal-fs-filename-typescript)
[warning] 34-34: Filesystem path is not a string literal; a request-/variable-derived path can enable path traversal. Validate and normalize the path before use.
Context: fs.writeFile(path.join(cwd, "test.ts"), "first\nsecond\nthird")
Note: [CWE-22] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
(detect-non-literal-fs-filename-typescript)
[warning] 207-207: Filesystem path is not a string literal; a request-/variable-derived path can enable path traversal. Validate and normalize the path before use.
Context: fs.writeFile(path.join(cwd, "large.ts"), Array.from({ length: 3000 }, () => "🔥".repeat(3000)).join("\n"))
Note: [CWE-22] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
(detect-non-literal-fs-filename-typescript)
[warning] 220-220: Filesystem path is not a string literal; a request-/variable-derived path can enable path traversal. Validate and normalize the path before use.
Context: fs.writeFile(path.join(cwd, "document.pdf"), Buffer.from([0, 1, 2]))
Note: [CWE-22] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
(detect-non-literal-fs-filename-typescript)
[warning] 221-221: Filesystem path is not a string literal; a request-/variable-derived path can enable path traversal. Validate and normalize the path before use.
Context: fs.writeFile(path.join(cwd, "image.svg"), "")
Note: [CWE-22] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
(detect-non-literal-fs-filename-typescript)
[warning] 222-222: Filesystem path is not a string literal; a request-/variable-derived path can enable path traversal. Validate and normalize the path before use.
Context: fs.writeFile(path.join(cwd, "binary.bin"), Buffer.from([0, 1, 2]))
Note: [CWE-22] Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
(detect-non-literal-fs-filename-typescript)
🔇 Additional comments (46)
.github/workflows/code-qa.yml (1)
95-96: LGTM!packages/types/src/index.ts (1)
23-23: LGTM!packages/types/src/read-files/__tests__/read-files-contracts.test.ts (1)
1-126: LGTM!packages/types/src/read-files/legacy-read-file-params.ts (1)
1-48: LGTM!packages/types/src/read-files/read-files-params.ts (1)
1-56: LGTM!packages/types/src/read-files/read-files-tool-name.ts (1)
1-2: LGTM!packages/types/src/read-files/read-files.ts (1)
1-4: LGTM!packages/types/src/tool-params.ts (1)
4-8: LGTM!packages/types/src/tool.ts (1)
2-2: LGTM!Also applies to: 28-28
src/core/prompts/tools/native-tools/file-reading/readFileParameters.ts (1)
1-90: LGTM!src/core/prompts/tools/native-tools/read_file.ts (1)
2-7: LGTM!Also applies to: 60-62, 87-87
src/core/prompts/tools/native-tools/read_files.ts (1)
1-26: LGTM!src/core/prompts/tools/native-tools/index.ts (1)
15-15: LGTM!Also applies to: 63-63
src/shared/tools.ts (1)
4-4: LGTM!Also applies to: 102-102, 115-115, 292-292, 321-321
src/core/prompts/tools/native-tools/__tests__/read_file.spec.ts (1)
2-2: LGTM!Also applies to: 13-18
src/core/prompts/tools/native-tools/__tests__/read_files.independence.spec.ts (1)
1-14: LGTM!src/core/prompts/tools/native-tools/__tests__/read_files.spec.ts (1)
1-53: LGTM!src/core/prompts/tools/native-tools/file-reading/__tests__/readFileParameters.spec.ts (1)
1-59: LGTM!scripts/code-qa-workflow.test.mjs (1)
29-42: LGTM!src/core/assistant-message/NativeToolCallParser.ts (1)
3-3: LGTM!Also applies to: 421-424, 756-760
src/core/assistant-message/__tests__/readFilesParser.spec.ts (1)
1-60: LGTM!src/core/assistant-message/presentAssistantMessage.ts (1)
5-5: LGTM!Also applies to: 20-21, 449-453, 895-902
src/core/tools/file-reading/ReadFileTool.ts (1)
1-355: LGTM!src/core/tools/file-reading/readLegacyFiles.ts (1)
1-134: LGTM!src/eslint-suppressions.json (1)
1007-1011: LGTM!src/core/tools/file-reading/readFileConstants.ts (1)
1-8: LGTM!src/core/tools/file-reading/readFileText.ts (1)
1-49: LGTM!src/core/tools/file-reading/readFileResults.ts (1)
1-41: LGTM!src/core/tools/file-reading/__tests__/readFileResults.spec.ts (1)
1-68: LGTM!src/core/tools/file-reading/__tests__/readFileText.spec.ts (1)
1-37: LGTM!src/core/tools/file-reading/__tests__/readFileTool.spec.ts (1)
16-33: LGTM!Also applies to: 1468-1486
src/core/mentions/index.ts (1)
14-14: LGTM!src/integrations/misc/__tests__/indentation-reader-unicode.spec.ts (1)
1-10: LGTM!src/integrations/misc/indentation-reader.ts (1)
20-20: LGTM!Also applies to: 241-245
webview-ui/src/components/chat/__tests__/ChatRow.read-files.spec.tsx (1)
1-59: LGTM!src/core/tools/file-reading/ReadFilesTool.ts (1)
1-117: LGTM!src/core/tools/file-reading/readFileBatchBudget.ts (1)
1-27: LGTM!src/core/tools/file-reading/readFileBatchEntry.ts (1)
1-95: LGTM!src/core/tools/file-reading/readFileBatchOutput.ts (1)
1-37: LGTM!src/core/tools/file-reading/clipUtf8.ts (1)
1-8: LGTM!src/core/tools/file-reading/__tests__/readFileBatchBudget.spec.ts (1)
1-115: LGTM!src/core/tools/file-reading/__tests__/readFileBatchEntry.spec.ts (1)
1-62: LGTM!src/core/tools/file-reading/__tests__/readFilesTool.spec.ts (1)
1-411: LGTM!apps/vscode-e2e/src/fixtures/read-file.ts (1)
2-2: LGTM!Also applies to: 19-63
apps/vscode-e2e/src/suite/tools/read-files.test.ts (1)
1-59: LGTM!src/api/providers/__tests__/openai-codex.spec.ts (1)
12-21: LGTM!Also applies to: 737-766
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Final autonomous verification for head 78ef79d:
Remaining blockers, not bypassed:
Merge order: #1950 first, then this dependent feature PR. No PR was merged and no deployment was performed. |
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Related GitHub Issue
Closes #1948
Description
Restore bounded multi-file reading through the companion
read_filesnative tool. This reduces intervening model/tool turns for already-known independent paths without introducing parallel dispatch or changing the Sol/Codex Responses Lite single-call constraint.This aligns with reliability-first exploration and provider-dependent reduction of model round trips, not a claim of faster disk I/O.
Test Procedure
Validated again in a clean worktree based on upstream main, excluding the six unrelated commits from the original working branch:
Environment: macOS, Node 24.7.0, pnpm 10.8.1. The repository requests Node 22.23.1; local commands emitted the engine warning but passed. CI should validate the declared runtime.
To reproduce the central feature coverage, run package-local Vitest for the file-reading feature directory, native tool/parser suites, and the Codex provider suite; run all tests in the shared-types package and the focused read-file approval/chat suites in the webview package.
Pre-Submission Checklist
Documentation Updates
Added an architecture note covering the native contract, interruption policy, aggregate-budget semantics, narrower image support, and reproducible local comparison.
Additional Notes
Autonomous verification update
Latest audited feature head: 3fa7910. It contains the reader foundation from #1950. On Node 22.23.1 the full monorepo test command completed successfully (13/13 tasks), including 9,787 extension tests and 1,893 webview tests; the seven existing file-read smoke scenarios and the new single-call native batch scenario passed in the real VS Code 1.100.0 extension host with a mock provider. Full lifecycle/parser/delegation model checks and MCP OAuth integration checks also passed locally. The compile prerequisite issue is fixed with a tested runtime-types build step, without disabling any check.
Stack access blocker: the upstream target still cannot be retargeted to the fork-only foundation branch. A maintainer must create the upstream base ref or merge #1950 through the normal process. The prepared separate extension diffs are 408 lines for the foundation and 301 lines for this feature; the combined comparison against main continues to exceed the unchanged 500-line scope gate. No scope exclusions or manual review-state label edits were added. CI and CodeRabbit completion are not inferred from local tests or a skipped-review status.