docs: add critical git rules for parallel agent work

Multiple agents may work on different files in the same worktree.
Added rules to prevent agents from accidentally committing or
destroying each other's work.

AGENTS.md

@@ -142,3 +142,43 @@ The script handles: version bump, CHANGELOG finalization, commit, tag, publish,
 ## **CRITICAL** Tool Usage Rules **CRITICAL**
 - NEVER use sed/cat to read a file or a range of a file. Always use the read tool (use offset + limit for ranged reads).
 - You MUST read every file you modify in full before editing.
+
+## **CRITICAL** Git Rules for Parallel Agents **CRITICAL**
+
+Multiple agents may work on different files in the same worktree simultaneously. You MUST follow these rules:
+
+### Committing
+- **ONLY commit files YOU changed in THIS session**
+- NEVER use `git add -A` or `git add .` - these sweep up changes from other agents
+- ALWAYS use `git add <specific-file-paths>` listing only files you modified
+- Before committing, run `git status` and verify you are only staging YOUR files
+- Track which files you created/modified/deleted during the session
+
+### Forbidden Git Operations
+These commands can destroy other agents' work:
+- `git reset --hard` - destroys uncommitted changes
+- `git checkout .` - destroys uncommitted changes
+- `git clean -fd` - deletes untracked files
+- `git stash` - stashes ALL changes including other agents' work
+- `git add -A` / `git add .` - stages other agents' uncommitted work
+
+### Safe Workflow
+```bash
+# 1. Check status first
+git status
+
+# 2. Add ONLY your specific files
+git add packages/ai/src/providers/transform-messages.ts
+git add packages/ai/CHANGELOG.md
+
+# 3. Commit
+git commit -m "fix(ai): description"
+
+# 4. Push (pull --rebase if needed, but NEVER reset/checkout)
+git pull --rebase && git push
+```
+
+### If Rebase Conflicts Occur
+- Resolve conflicts in YOUR files only
+- If conflict is in a file you didn't modify, abort and ask the user
+- NEVER force push