Claude Desktop Filesystem extension ships outdated dist with root path normalization bug #3417

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1. xXMrNidaXx commented on Feb 28, 2026

   

   xXMrNidaXx

   on Feb 28, 2026

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   This is a build/release pipeline issue — the extension bundle shipped to Claude Desktop users doesn't match the source.

   Immediate workaround for affected users:

   1. Find the installed extension:

      ~/Library/Application\ Support/Claude/claude_desktop_config.json
      

      Check mcpServers.filesystem.command for the path to the installed package.

   2. Patch the regex directly in dist/path-utils.js:

      // Change this:
      return p.replace(/\/+/g, '/').replace(/\/+$/, '');
      
      // To this:
      return p.replace(/\/+/g, '/').replace(/(?<!^)\/$/, '');

   3. Or, install the upstream version directly instead of using the bundled extension:

      npm install -g @modelcontextprotocol/server-filesystem@latest

      Then update claude_desktop_config.json to point to the global install.

   Root cause speculation:

   The extension version 2025.8.21 suggests a snapshot from August 2025. If the fix landed after that snapshot was taken, it wouldn't be in the bundled build. The versioning gap (2025.8.21 vs upstream 0.6.3) makes it hard to track which commits are included.

   Suggestion for maintainers:

   Consider adding a CI check that verifies the dist/ output is deterministic and matches a clean rebuild from src/. This would catch cases where dist/ gets out of sync with src/ before a release.
2. cliffhall commented on Oct 19, 2026

   

   cliffhall

   on Oct 19, 2026

   Member

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   Closing: superseded by the v2 release.

   Thank you for reporting this, and apologies for the long wait for a response.

   Since this was filed, the reference servers have been rebuilt for the 2026-07-28 MCP specification (#4857) and released as v2 (2.0.0 on npm for the TypeScript servers, 2026.10.19 on PyPI for the Python servers). Each server now runs on v2 of its SDK, and the behavior described here has either been fixed or no longer exists in the same form. The root-path normalization fix is in current source; the outdated build ships in the Claude Desktop extension bundle, which is maintained outside this repository.

   This is not a judgment on whether the problem was real; it's a consequence of the code it describes having been replaced. This is happening as part of the backlog triage in #4875.

   If this still happens on the v2 release, we'd genuinely like to know. Please open a fresh issue with the version you're running and steps to reproduce, and we'll look at it. Note that this repository accepts contributions as issues rather than pull requests; see CONTRIBUTING.md.

   Thanks for taking the time to report it.
3. cliffhall

   closed this as not plannedon Oct 19, 2026
4. cliffhall

   added

   closed-superseded-v2Closed: fixed or made obsolete by the v2 / 2026-07-28 refactor (#4875)Closed: fixed or made obsolete by the v2 / 2026-07-28 refactor (#4875)

   on Oct 19, 2026