Lists multiple specific concrete actions: 'CORS, rate limiting, security headers, trusted hosts, input validation, HTTPS redirect, and request size limits.' These are all concrete, specific security features.

Clearly answers both what ('CORS, rate limiting, security headers...') AND when ('Apply these whenever you create or modify any FastAPI app', 'If you are writing app = FastAPI(), you must also add these'). Explicit trigger guidance is provided.

Includes natural keywords users would say: 'FastAPI', 'security', 'CORS', 'rate limiting', 'HTTPS', and the explicit code pattern 'app = FastAPI()'. Good coverage of both technical terms and framework-specific language.

Highly specific to FastAPI security defaults with clear niche. The explicit mention of 'FastAPI' and specific security features like 'trusted hosts' and 'request size limits' makes it unlikely to conflict with general security or other framework skills.

The skill is comprehensive but includes some redundancy - the WRONG/RIGHT pattern repeats explanations, and some rules are stated multiple times across sections. The checklist at the end duplicates information already covered in detail above.

Excellent actionability with fully executable, copy-paste ready code examples for every security measure. Each section provides complete, working code with proper imports and configuration, plus explicit WRONG vs RIGHT comparisons.

Clear sequencing with explicit middleware order section explaining why order matters. The numbered list of 7 requirements, the middleware order code block, and the final checklist provide unambiguous workflow guidance for implementing security in FastAPI apps.

The skill is self-contained with good internal structure (numbered sections, clear headers), but at ~350 lines it could benefit from splitting detailed examples into separate reference files. The verifiers section at the end provides good external references but the main content is monolithic.