version 0.46.10 I use the below cursor rule file saved in .cursor/rules/000-core.mdc and when the agent determines it appropriate it does in fact attempt to create/edit new rules. The issue is that it creates the file (usually in the right directory but sometimes in a different directory), but the…

Update 0.49.x fixes this issue. We can easily update .mdc files!

Cursor agent cannot write to .cursor/rules files

eykd March 17, 2025, 5:02pm 3

Edit mode wasn’t any better. It creates an empty file in the root of the project folder.

Topic		Replies	Views
Cursor agent cannot write to .cursor/rules (even to *.mdc files) Bug Reports	7	263	June 6, 2025
Enable agent to update .cursor/rules Feedback	20	868	March 22, 2025
.mdc files in .cursor/rules/ not or rarely writeable by Cursor Agent Bug Reports	3	258	May 20, 2025
Agent can't access .cursor/rules folder to modify them Bug Reports	3	124	May 22, 2025
[Bug] Rules in /rules folder require undocumented .mdc format and special save process Bug Reports	10	1018	April 2, 2025