Conciseness

The body is dense and assumes Claude's competence — no space is spent explaining what Netlify, TOML, or redirects are; nearly every line is platform-specific knowledge ('307 is unsupported', 'proxy timeout 26 s', 'Paths ... absolute relative to the base directory'). It misses a 5 because of minor trims: house rule 4 duplicates the per-scope precedence rule already stated in the Scopes paragraph, and the HTML comment markers add noise.

Actionability

Virtually every section provides copy-paste-ready executable snippets: TOML blocks for build/contexts, redirects, headers, functions, and dev config; a full '_redirects' syntax block with working example rules; CLI commands ('netlify env:set KEY value --secret'); and a Node ignore script. These cover the common cases directly.

Workflow Clarity

This is a reference-style skill rather than a linear workflow, and each task (add a redirect, set a scoped env var, configure monorepo paths) maps to unambiguous guidance with explicit failure-mode checkpoints ('a /x/ → /x 301! rule loops infinitely', 'oversized serialized output fails the deploy', secret scan 'fails the build on detection'). Not 5: there is no end-to-end validate-after-config sequence or feedback loop for verifying a config before deploy; not 3: checkpoints for the risky operations are explicitly present.

Progressive Disclosure

The body is well-sectioned but is a single ~280-line monolith with no bundle files at all: the full '_redirects' syntax catalog, the Secrets Controller policy details, and the env-var API/name catalog are prime candidates for references/ files. Additionally, the HTML comment 'agent-context/config/system.md — ... merged by ctx-gen' references a file that is not present in the bundle. Anchor 3 ('content that should be separate is inline'), not 4, because essentially no content is offloaded from SKILL.md.

Specificity

The description lists many concrete, specific actions — 'setting a build command or publish directory, adding redirects or rewrites or proxies, adding an SPA fallback rewrite, setting custom response headers or basic auth, ... configuring functions bundling, ignoring builds, or wiring up a monorepo' — with comprehensive coverage and no padding. Not 4: there are no meaningful gaps in the action coverage.

Completeness

It explicitly answers both 'what' ('Configure Netlify builds and routing via netlify.toml, _redirects, and _headers') and 'when' with an explicit 'Use when ...' clause enumerating concrete trigger scenarios. Clear anchor-5 match; not 4 because the when-clause is explicit and highly specific.

Trigger Term Quality

It covers natural phrases users would say ('build command', 'publish directory', 'redirects', 'proxies', 'basic auth', 'secrets', 'monorepo', 'SPA') plus the exact config filenames ('netlify.toml', '_redirects', '_headers') as file-level identifiers. Matches the comprehensive-with-synonyms anchor; a 4 would require missing natural terms, which is not the case.

Distinctiveness Conflict Risk

The Netlify-specific triggers ('netlify.toml', '_redirects', '_headers', 'Netlify') carve a clear niche with minimal overlap risk against generic deploy/hosting or CI skills. Not 4: the platform-named triggers make confusion with a closely related skill unlikely.