Mostly efficient and focused on PostHog-specific details Claude would not know, but repeats itself: the 'personal-API-key only' caveat appears three times (workflow, example, and Important notes), and the Example Interaction section largely restates the Workflow's report format and findings.

Provides fully executable SQL queries against named tables/columns, concrete tool calls, a copy-paste-ready report template, and specific next-step questions tied to exact endpoint-update parameters — copy-paste ready.

A clear 5-step sequence with explicit checkpoints ('No rows → say so and stop'), cross-referencing between steps, and confirm-before-act feedback loops guarding the destructive write path, matching the top anchor.

No bundle files exist, so all content lives in SKILL.md, but it is organized into clear, navigable sections (When to use, Available tools, What counts as an issue, Workflow, Important notes) with no nested reference chains — well-organized for discovery.

Lists multiple concrete actions — 'Audit every endpoint ... for staleness, failed materialisations, and unused materialised versions' and 'Produces a prioritised report grouped by issue type, with recommended actions' — matching the top anchor for multiple specific concrete actions.

Explicitly answers both what (audit endpoints / produce a prioritised report) and when ('Use when the user asks ...'), with an explicit 'Use when' trigger clause, hitting the top anchor.

Quotes natural user phrasings verbatim — 'what endpoints can I clean up?', 'are any of my endpoints broken?', 'which materialised versions are still being called?' — giving good coverage of terms a user would actually say.

Scoped to a clear niche (PostHog Endpoints product auditing) with distinct triggers and an explicit hand-off boundary ('does not modify anything without explicit confirmation'), making overlap with other skills unlikely.