chore: add AGENTS.md

AGENTS.md

@@ -0,0 +1,16 @@
+Before finishing your work, you must run the FULL verification suite below.
+
+```sh
+pnpm build                              # Build all packages (required before test/typecheck)
+pnpm run typecheck                      # Typecheck
+pnpm run ci:biome                       # Format + lint check
+pnpm test                               # Run tests
+```
+
+If issues arise, fix the issues and run the FULL verification suite again. Repeat this process until the ENTIRE suite passes.
+
+Use the following command to fix format and lint issues.
+
+```sh
+  pnpm exec biome check --write <files>   # Format + lint fix
+```

CLAUDE.md

@@ -0,0 +1 @@
+@AGENTS.md