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gemini-cli - 💡(How to fix) Fix Cannot read properties of undefined (reading 'type') on write_file/replace tools

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What happened?

The write_file and replace tools are consistently failing with a TypeError related to reading a type property of an undefined object, likely causing a crash in the tool's internal validation engine. This prevents any file modifications.

What did you expect to happen?

I expected the write_file and replace tools to successfully write or modify the files with the provided content, returning a confirmation message and reflecting the changes on the filesystem immediately.

Client information

  • CLI Version: 0.42.0
  • Git Commit: 68e2196d5
  • Session ID: 0d20c76f-20da-4e94-aa5d-3b4d8b2d4a20
  • Operating System: win32 v24.13.0
  • Sandbox Environment: no sandbox
  • Model Version: auto-gemini-3
  • Auth Type: oauth-personal
  • Memory Usage: 319.1 MB
  • Terminal Name: xterm.js(6.1.0-beta.213)
  • Terminal Background: #1f1f1f
  • Kitty Keyboard Protocol: Supported
  • IDE Client: VS Code

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