The description mentions 'finds AND fixes security problems' and references handling 'credentials, user input, or external data,' but it doesn't list multiple specific concrete actions (e.g., what specific fixes it performs, what steps are involved). It names the domain and some actions but isn't comprehensive about the concrete capabilities.

Clearly answers both 'what' (finds and fixes security problems in a Flows app) and 'when' (when fixing security issues, before shipping features handling credentials/user input/external data, when user asks for security fix/hardening/vulnerability remediation). Explicit trigger guidance is provided.

Excellent coverage of natural trigger terms including 'security fix', 'vulnerability', 'XSS', 'injection', 'credentials', 'secrets', 'auth', 'authentication', 'authorization', 'token', 'sensitive data', 'input validation', 'CORS', 'CSP', 'dependency audit'. These are terms users would naturally use when requesting security-related work.

Clearly scoped to security issues in a 'Flows app' context, with distinct security-specific triggers. The combination of domain (Flows app security) and extensive security-specific trigger terms makes it unlikely to conflict with non-security skills.

The skill is fairly long but most content earns its place — the grep commands, fix patterns, and code examples are all actionable. However, some sections include explanatory text that Claude doesn't need (e.g., explaining what CDF is, why secrets are bad, what DOMPurify does). The 'What is acceptable' subsection in Step 2 and some of the table entries could be tightened.

Excellent actionability throughout. Every step includes concrete grep/bash commands to find issues, specific code examples showing before/after fixes, exact package install commands (pnpm add dompurify, pnpm add zod), and copy-paste ready configuration blocks (CSP headers, Zod schemas, DOMPurify usage).

The 9-step workflow is clearly sequenced with a logical progression (map surface → fix SDK usage → credentials → DOM → auth → validation → config → dependencies → report). Each step includes both detection and remediation. Step 9 provides a validation/reporting checkpoint with a summary table. The 'find AND fix' mandate with the final report of unfixable items creates a clear feedback loop.

The content is a single monolithic file with no references to supporting documents, which is understandable given no bundle files exist. However, at ~250+ lines, some sections (like the CDF SDK migration table, the Vite config details, or the Zod validation examples) could benefit from being split into referenced files. The structure within the file is well-organized with clear headers and numbered steps.