Agent conventions + ignore wishlist drafts

AGENTS.md: wishlist-draft flow, few-commits norm, release flow,
secret handling. .gitignore: drafts stay local-only.

.gitignore

@@ -23,6 +23,11 @@ app.*.map.json
 # Logs
 *.log
 
+# Local-only agent draft lists (raw wishlists; translated into docs by an
+# agent, never committed) — see AGENTS.md
+docs/Wishlist.md
+docs/drafts/
+
 # IDE
 .idea/
 *.iml