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openclaw - ✅(Solved) Fix [Bug] edit tool requires exact text match causing memory write failures [1 pull requests, 1 participants]

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openclaw/openclaw#62465•Fetched 2026-04-08 03:03:57
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Error Message

The edit tool requires exact string matching between oldText and file content, including all whitespace and newlines. When a file is modified by another process or concurrent session, the edit fails silently or with 'Could not find the exact text' error.

Fix Action

Fixed

PR fix notes

PR #62507: fix(edit-tool): improve error messages when fuzzy matching is used (#62465)

Description (problem / solution / changelog)

Summary

Issue #62465: edit tool requires exact text match causing memory write failures

The edit tool in pi-coding-agent has fuzzy matching capability, but the error messages always said "exact text" even when fuzzy matching was attempted. This was confusing for users who saw errors like "Could not find the exact text" when fuzzy matching had already been tried and failed, or "Found N occurrences" when fuzzy normalization caused multiple matches.

Changes

  • Modified to include a hint when fuzzy matching was applied but the text was not found
  • Modified to explain when fuzzy matching normalized the text causing multiple matches, and suggest adding more context
  • Updated to pass the flag to error functions

The patch is applied automatically via the postinstall script () to avoid modifying pi-coding-agent directly in node_modules.

Example Error Messages

Before:

After (when fuzzy matching was attempted):

Before:

After (when fuzzy matching caused duplicates):

Testing

All existing tests pass. The changes only affect error message content, not the edit logic itself.

Changed files

  • package.json (modified, +4/-0)
  • scripts/patches/apply-pi-coding-agent-edit-diff-patch.mjs (added, +109/-0)
  • scripts/patches/pi-coding-agent-edit-diff.patch (added, +59/-0)
  • scripts/postinstall-bundled-plugins.mjs (modified, +112/-1)
  • src/plugins/contracts/package-manifest.contract.test.ts (modified, +2/-2)

Code Example

[tools] edit failed: Could not find the exact text in /Users/jayden/.openclaw/workspace/AUDIT_LEDGER.md. The old text must match exactly including all whitespace and newlines.
[tools] edit failed: Could not find the exact text in /Users/jayden/.openclaw/workspace/memory/2026-04-05.md. The old text must match exactly including all whitespace and newlines.
[tools] edit failed: Found 11 occurrences of the text in /Users/jayden/.openclaw/workspace/memory/2026-04-05.md. The text must be unique. Please provide more context to make it unique.
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Bug Description

The edit tool requires exact string matching between oldText and file content, including all whitespace and newlines. When a file is modified by another process or concurrent session, the edit fails silently or with 'Could not find the exact text' error.

Frequency

7 occurrences observed across 2026-04-05 to 2026-04-07

Log Evidence

[tools] edit failed: Could not find the exact text in /Users/jayden/.openclaw/workspace/AUDIT_LEDGER.md. The old text must match exactly including all whitespace and newlines.
[tools] edit failed: Could not find the exact text in /Users/jayden/.openclaw/workspace/memory/2026-04-05.md. The old text must match exactly including all whitespace and newlines.
[tools] edit failed: Found 11 occurrences of the text in /Users/jayden/.openclaw/workspace/memory/2026-04-05.md. The text must be unique. Please provide more context to make it unique.

Impact

  • Memory writes fail → risk of data loss
  • Long-running memory entries get corrupted mid-write
  • Forces user to re-read file before every edit (anti-pattern)

Suggested Fix

  1. Provide 'force overwrite' mode that ignores whitespace differences
  2. Use semantic/hunk-based diff instead of exact string match
  3. Show diff preview before failing

extent analysis

TL;DR

Implement a 'force overwrite' mode or use a semantic diff approach to mitigate edit failures due to whitespace differences.

Guidance

  • Consider implementing a 'force overwrite' mode that ignores whitespace differences between the old text and file content to reduce edit failures.
  • Explore using a semantic or hunk-based diff instead of exact string matching to improve the edit tool's robustness against concurrent modifications.
  • Displaying a diff preview before attempting to edit the file could help users identify and resolve potential issues proactively.
  • Reviewing the log evidence suggests that providing more context to make the text unique could be a temporary workaround for some cases.

Example

No explicit code example is provided due to the lack of specific implementation details in the issue.

Notes

The suggested fixes aim to address the issue of exact string matching causing edit failures. However, the best approach may depend on the specific requirements and constraints of the edit tool and its usage scenario.

Recommendation

Apply a workaround, such as implementing a 'force overwrite' mode, as it seems to be a more straightforward and immediate solution to mitigate the edit failures, although using a semantic diff approach might be a more robust long-term fix.

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