The skill is mostly efficient and covers genuinely non-obvious information (unintuitive subcommand paths, boolean flag gotchas, SSL hostname confusion), but some sections are slightly verbose — e.g., the propagation delays section and KV Store gotchas could be tighter. The inline comments in code blocks sometimes over-explain. Overall it respects Claude's intelligence but could be trimmed ~15-20%.

Excellent actionability throughout. Every pattern includes copy-paste-ready bash commands with correct flags. The skill explicitly shows correct vs. wrong usage (boolean flags, domain creation), provides concrete curl validation commands, and includes specific flag values. The New VCL Service Setup Workflow is fully executable end-to-end.

The New VCL Service Setup Workflow is exemplary: 6 clearly sequenced steps with explicit validation checkpoints (pre-flight origin check, version validation before activation, propagation verification with retry guidance). Error recovery is addressed (500 Domain Not Found is normal, 503 means check SSL). The autoclone pattern prevents the most common workflow error (locked version).

Clean reference table at the top with 8 topic-specific files, each with a clear 'Use when...' description. The main SKILL.md serves as an effective overview with the most critical patterns inline, while pointing to detailed references for auth, compute, services, logging, NGWAF, stats, stores, TLS, and troubleshooting. All references are one level deep and clearly signaled.

Lists multiple specific concrete actions: managing CDN services, Compute deploys, deploying applications, managing backends/domains/VCL snippets, purging cache, configuring log streaming, setting up TLS certificates, managing KV/config/secret stores, checking service stats, authenticating with SSO, service CRUD, version management, autocloning, and troubleshooting CLI errors.

Clearly answers both 'what' (executes Fastly CLI commands for managing CDN services, Compute deploys, edge infrastructure, with extensive list of capabilities) and 'when' (explicit 'Use when' clause with detailed trigger scenarios including specific CLI commands, file references, and use cases).

Excellent coverage of natural trigger terms users would say: 'fastly', 'fastly CLI', 'fastly compute', 'fastly service', 'fastly auth', 'fastly.toml', 'purging cache', 'backends', 'domains', 'VCL snippets', 'TLS certificates', 'KV store', 'config store', 'secret store', 'Fastly SSO', and specific CLI subcommands. These match what users would naturally type.

Highly distinctive with a clear niche around the Fastly CLI specifically. The description is tightly scoped to Fastly CLI operations with specific subcommands and Fastly-specific terminology (fastly.toml, Fastly Compute, VCL snippets, autocloning), making it very unlikely to conflict with other skills.