docs: Add process for drafting comments in scratch files

Author: domdomegg

CLAUDE.md

@@ -51,6 +51,17 @@ This document contains critical information about working with this codebase. Fo
 - NEVER ever mention a `co-authored-by` or similar aspects. In particular, never
   mention the tool used to create the commit message or PR.
 
+## Drafting Comments and Messages
+
+When drafting PR comments, GitHub issue responses, or other messages for review:
+
+1. Create a scratch file in `/tmp/` (e.g., `/tmp/comment.md`)
+2. Write the draft content to that file
+3. Open it in VS Code using `code /tmp/comment.md` for review
+4. User will review and post manually
+
+This allows for easy editing and review before posting.
+
 ## Python Tools
 
 ## Code Formatting