computer-use MCP server: checkAccessibility/registerEscape undefined errors on initialization

Bug Description

The computer-use MCP server fails on every tool call with JavaScript runtime errors indicating internal objects are not initialized properly.

Errors

On request_access and list_granted_applications:

Cannot read properties of undefined (reading 'checkAccessibility')

On screenshot:

Cannot read properties of undefined (reading 'registerEscape')

Steps to Reproduce

1. Have computer-use MCP server connected (shows "Reconnected to computer-use" on /mcp)
2. Call any computer-use tool (e.g. request_access, screenshot, list_granted_applications)
3. All calls fail with the above errors

Attempted Fixes (none worked)

• Reconnecting MCP via /mcp command
• Fully quitting and relaunching the app
• Verifying accessibility/screen recording permissions in System Settings

Environment

• macOS (Darwin 25.3.0)
• Claude Code CLI

Notes

The errors are JavaScript TypeErrors — the server's internal modules (checkAccessibility, registerEscape) are undefined at call time, suggesting an initialization/startup failure in the MCP server process.

🤖 Generated with Claude Code