[FEATURE] .claudeignore

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I often struggle with credential management, and I'm unwilling to delegate reading and utilizing credentials to my agents directly.

Proposed Solution

similar to .gitignore, I'd like explicitly set Claude not to be able to read/interact with certain filesystem paths or names

Alternative Solutions

I've tried putting some things into my prompts, claude.md, or agents, but my tolerance for leaking credentials is at 0, so having something clear and always applied matters to me.

Priority

Medium - Would be very helpful

Feature Category

Developer tools/SDK

Use Case Example

I'm working a on a react front end.
I have production and local keys. I'd like claude to be able to interact with my local keys, but not my production ones directly.

Additional Context

_No response_