feat: add target repo examples and file layout guidance

he-maintainer/SKILL.md

@@ -66,6 +66,18 @@ Depending on the request, create or update one or more of:
 
 Prefer short, maintainable files over one giant document.
 
+## Target-repo file roles
+
+Use these roles by default:
+
+- `AGENTS.md`: the shortest practical working guide; key commands, constraints, and major repo structure
+- `ai/project-map.md`: directory responsibilities, entrypoints, and important data or control flow notes
+- `ai/task-templates.md`: reusable task request formats for bugfix, feature, refactor, migration, and test-writing work
+- `ai/risk-guardrails.md`: high-risk areas, forbidden changes, slow validations, generated files, and deployment-sensitive zones
+- `ai/harness-health.md`: current harness audit snapshot and next improvement priorities
+
+If the repo is small, keep most content in `AGENTS.md` and delay the extra files until needed.
+
 ## Update policy
 
 Prefer targeted edits over full rewrites.