Where does the bug appear (feature/product)? Cursor IDE Describe the Bug [BUG] AI Agent Write/StrReplace Tools Blocked on .cursor/rules/private/*.mdc Files Summary The AI agent’s Write and StrReplace tools fail with “Write permission denied” when writing to .mdc files in .cursor/rules/private/, des…

Hey, thanks for the report. It looks like the Write and StrReplace tools are being blocked because .cursor/rules/ is considered a configuration directory. According to the security docs ( Agent Security | Cursor Docs ), agents can modify workspace files without confirmation, but configuration files r…

I’m encountering the same issue. Here’s a suggestion: similar to “Dotfile Protection,” we could add a “Configfile Protection” feature. The problem: From a usage perspective, .cursor/rules serves different purposes for different users: Static configuration: Some users treat it as configuration fi…

Thanks for the quick response, Dean! I understand that .cursor/rules/ is considered a configuration directory. However, the issue is that Cursor doesn’t ask for approval at all - it just automatically denies the operation with “Write permission denied.” According to the security docs you reference…

Exactly! I’m a user like your bullet point #2 - I use .cursor/rules dynamically. After a couple of prompts and progress, or when I read new Confluence pages at my company, I want to create new private rules for Cursor to be better at my specific work. So I make dynamic rules that update regularly a…

Thanks, got it. This is a bug: for .cursor/rules there should be a confirmation prompt, not an auto-decline. I’ve already passed it to the engineering team and we’ll fix it. We need a bit more info: Reproduce the StrReplace issue and send a separate Request ID Confirm whether Privacy Mode was tur…

Where does the bug appear (feature/product)? Cursor IDE Describe the Bug cursor ide can’t modify files under .cursor directory , write permissions denied on windows system Steps to Reproduce i ask agent to modify .cursor/commands/xxx.md files, but i failed. and i tried to change .cursor’s permis…

I’ve experienced the same (similar issue). Maybe it’s related to Flutter MCP and ClickUp MCP being installed? Still doesn’t work after removing them To reproduce, I’ve specifically asked the LLM to try using the tool ``` /Users/balazsbenedek/development/easyling/easyling/pagetranslate/src/main/…

This workaround works for me (Mac OS, Composer 1). Add this to your AGENTS.md file: Workaround: Editing .cursor/ files Problem: Cursor blocks Write/StrReplace tools on .cursor/ directory. write permission denied: Workaround: Use copy-ask-move (paths relative to repo root): :warning: Safety Note:…

New update: removing Flutter MCP and restarting the laptop helped!

Please guys, huge blocker. Sorry if bumping is against the rules. Problem statement: Agent should be able to edit files under .cursor/rules.

[BUG] AI Agent Write/StrReplace Tools Blocked on .cursor/rules/private/*.mdc Files

Support Bug Reports

alejandro_velez (Alejandro Velez Patiño) January 15, 2026, 5:47pm 19

Same problem here I am facing the same issue

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[BUG] AI Agent Write/StrReplace Tools Blocked on .cursor/rules/private/*.mdc Files

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