feat: add git commit step to map-codebase workflow

get-shit-done/workflows/map-codebase.md

@@ -335,6 +335,28 @@ wc -l .planning/codebase/*.md
 
 If any checks fail, report issues to user.
 
+Continue to commit_codebase_map.
+</step>
+
+<step name="commit_codebase_map">
+Commit the codebase map:
+
+```bash
+git add .planning/codebase/*.md
+git commit -m "$(cat <<'EOF'
+docs: map existing codebase
+
+- STACK.md - Technologies and dependencies
+- ARCHITECTURE.md - System design and patterns
+- STRUCTURE.md - Directory layout
+- CONVENTIONS.md - Code style and patterns
+- TESTING.md - Test structure
+- INTEGRATIONS.md - External services
+- CONCERNS.md - Technical debt and issues
+EOF
+)"
+```
+
 Continue to offer_next.
 </step>