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[Fix] apply_diff auto-approves edits outside the workspace - #2343

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kanchinadd98:fix/apply-diff-outside-workspace

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@kanchinadd98 kanchinadd98 commented Nov 7, 2026 •

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Related GitHub Issue

Closes: #2249

I commented "Claiming" on the issue. Maintainer assignment is pending.

Description

apply_diff did not set isOutsideWorkspace in its approval payload. checkAutoApproval reads a missing value as false. So with alwaysAllowWrite on, auto-approval approved diffs to files outside the workspace. This occurred even when alwaysAllowWriteOutsideWorkspace was off and no allowedWriteFiles pattern matched the path. write_to_file and edit asked for approval in the same situation.

This PR computes isPathOutsideWorkspace(absolutePath) in ApplyDiffTool and adds it to the payload. It uses the same pattern as EditTool and WriteToFileTool. The change covers two places:

  • execute: the approval payload. Both the diff-view path and the preventFocusDisruption path use this payload.
  • handlePartial: the streaming preview payload.

The auto-approval logic does not change.

Test Procedure

New spec: src/core/tools/__tests__/applyDiffTool.outsideWorkspace.spec.ts

  • The approval payload reports isOutsideWorkspace for a file inside and a file outside the workspace, on the diff-view path and on the preventFocusDisruption path.
  • The partial preview payload reports isOutsideWorkspace for both cases.
  • The payload goes through checkAutoApproval with alwaysAllowWrite: true:
    • Outside the workspace, alwaysAllowWriteOutsideWorkspace: false: ask.
    • Outside the workspace, alwaysAllowWriteOutsideWorkspace: true: approve.
    • Inside the workspace: approve.

I ran the new spec without the fix. 7 of 9 tests failed, including the "outside the workspace asks" case. The 2 approve cases passed, as expected.

applyDiffTool.failureReporting.spec.ts now mocks isPathOutsideWorkspace. Its vscode mock has no workspace export, and the tool now calls the check.

Commands (from src):

npx vitest run core/tools core/auto-approval core/assistant-message   # 56 files, 1096 tests pass
pnpm run check-types                                                  # pass
pnpm exec eslint --prune-suppressions --max-warnings=0 <changed files> # pass, no suppression change

Pre-Submission Checklist

  • Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
  • Scope: My changes are focused on the linked issue (one major feature/fix per PR).
  • Self-Review: I reviewed my own code with care.
  • Writing Style: The PR title and description use Simplified Technical English (ASD-STE100): short sentences, plain words, active voice, one idea per sentence, no contractions.
  • Testing: New and/or updated tests have been added to cover my changes (if applicable).
  • Test Helpers (test changes only): Shared test helpers (src/test-utils/, @/utils/test-utils) are used only for mechanical duplication; test intent and scenario-specific mocks remain visible.
  • Visual Snapshot (UI changes only): Not applicable. This PR has no UI change.
  • Documentation Impact: I checked if my changes need documentation updates (see "Documentation Updates" section below).
  • Contribution Guidelines: I read and agree to the Contributor Guidelines.

Documentation Updates

  • No documentation updates are required.

Additional Notes

The change has an effect only when auto-approval and alwaysAllowWrite are on. apply_diff edits only files that exist. It does not create new files.

Get in Touch

Discord: kanchinadd_79159

apply_diff did not set isOutsideWorkspace in its approval payload.
Auto-approval read the missing value as inside the workspace, so with
alwaysAllowWrite on it approved diffs to files outside the workspace
even when alwaysAllowWriteOutsideWorkspace was off.

Compute the flag in execute and handlePartial, as write_to_file and
edit already do.

Closes Zoo-Code-Org#2249

Co-authored-by: Cursor <cursoragent@cursor.com>
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Explain Change →

No actionable comments were generated in the recent review.

Summary

Summary by CodeRabbit

  • New Features
    • Applied-diff approval messages and previews now indicate when a file is outside the workspace. Outside-workspace files require approval unless that option is enabled.

ApplyDiffTool now marks completed and partial applied-diff messages with whether the resolved target path is outside the workspace. Tests cover reported flags and auto-approval decisions under outside-workspace settings.

Changes: Outside-workspace diff approval

Layer / File(s) Summary
Report and verify diff workspace status
src/core/tools/ApplyDiffTool.ts, src/core/tools/__tests__/applyDiffTool.outsideWorkspace.spec.ts, src/core/tools/__tests__/applyDiffTool.failureReporting.spec.ts
Completed and partial applied-diff messages include the outside-workspace status of the resolved path. Tests check the status for inside and outside paths, and verify auto-approval outcomes when outside-workspace writes are allowed or disallowed.

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Possibly related PRs

  • Zoo-Code-Org/Zoo-Code#1918: Routes apply_diff saves through guardedWrite, which requires approval data for outside-workspace targets.
  • Zoo-Code-Org/Zoo-Code#1917: Passes outside-workspace approval and a captured canonical target from ApplyDiffTool to guarded saves.
Merge Risk: Minimal · up to a4b20

The change addresses outside-workspace diff approval without adding a merge-blocking risk. The separate, pre-existing symlink gap remains for follow-up.

Pre-merge checks: Passed 8

Check name Status Explanation
Title check Passed The title identifies the outside-workspace auto-approval bug that the PR fixes.
Description check Passed The description links the issue and explains the fix, tests, checklist, and documentation impact. The omitted visual sections do not apply to this change.
Linked Issues check Passed [#2249] ApplyDiffTool adds isOutsideWorkspace to execution and partial-preview payloads using the resolved path. Existing auto-approval logic honors alwaysAllowWriteOutsideWorkspace and `allowed…
Out of Scope Changes check Passed [#2249] The payload changes, new tests, and failure-reporting test mock support the outside-workspace approval fix. The whole-PR summary shows no unrelated changes.
Regression Evidence Passed The new tests cover both approval paths, partial previews, and the auto-approval decisions for inside and outside paths. A real workspace check covers ../ traversal. Existing tests cover write allow…
Security Boundaries Passed The change adds workspace classification to both approval payloads and partial previews. The existing auto-approval logic uses the classification to restrict outside-workspace writes. The diff does no…
Persistence Integrity Passed The changes add workspace classification to approval and preview payloads. They do not change the file-write, rollback, or persisted-default paths.
Lifecycle Resource Cleanup Passed The production change adds workspace classification to approval and preview payloads. The classification helper reads workspace folders and resolves paths; it does not create lifecycle resources or sc…
Full details: Linked Issues check

Explanation

[#2249] ApplyDiffTool adds isOutsideWorkspace to execution and partial-preview payloads using the resolved path. Existing auto-approval logic honors alwaysAllowWriteOutsideWorkspace and allowedWriteFiles. The new tests cover both approval paths, partial previews, and approval decisions.

Full details: Regression Evidence

Explanation

The new tests cover both approval paths, partial previews, and the auto-approval decisions for inside and outside paths. A real workspace check covers ../ traversal. Existing tests cover write allowlists and the no-workspace case.

Full details: Security Boundaries

Explanation

The change adds workspace classification to both approval payloads and partial previews. The existing auto-approval logic uses the classification to restrict outside-workspace writes. The diff does not introduce a security-boundary bypass.

Full details: Lifecycle Resource Cleanup

Explanation

The production change adds workspace classification to approval and preview payloads. The classification helper reads workspace folders and resolves paths; it does not create lifecycle resources or schedule work.

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55-59: LGTM!

Also applies to: 141-141, 177-209

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✅ All modified and coverable lines are covered by tests.

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Actionable comments posted: 2


  • Fix comments: Fix CodeRabbit comments on this PR
Prompt to fix all issues
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Inline comments:
Review comments at
@src/core/tools/__tests__/applyDiffTool.outsideWorkspace.spec.ts:
- Around line 1-196: Add a relative-traversal test to the ApplyDiffTool
isOutsideWorkspace suite that exercises the real isPathOutsideWorkspace check
with a mocked workspace folder and a ../ path resolving outside it, rather than
relying on the mocked return value in runExecute. Assert the approval payload
marks isOutsideWorkspace true and checkAutoApproval returns ask when outside
writes are disabled and no allowlist entry matches.

Review comments at @src/core/tools/ApplyDiffTool.ts:
- Line 142: Update the path validation around isPathOutsideWorkspace so it
checks the effective destination after resolving symlinks, not only absolutePath
lexically. Use the project’s established path-resolution mechanism and ensure
writes through workspace symlinks to outside targets are classified as outside
and still require approval when preventFocusDisruption and alwaysAllowWrite are
enabled.

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Comment thread src/core/tools/ApplyDiffTool.ts Resolved
@github-actions github-actions Bot added awaiting-author PR is waiting for the author to address requested changes and removed coderabbit-review-active Required CI passed; CodeRabbit review is active awaiting-coderabbit Waiting for CodeRabbit to approve the latest commit labels Nov 7, 2026
…heck

Run isPathOutsideWorkspace against a mocked workspace folder. A ../ path
that resolves outside the workspace sets isOutsideWorkspace and asks for
approval. A path inside the workspace is still auto-approved.

Co-authored-by: Cursor <cursoragent@cursor.com>
@github-actions github-actions Bot removed the awaiting-author PR is waiting for the author to address requested changes label Nov 7, 2026
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