perf-astro

Astro-specific performance optimizations for 95+ Lighthouse scores. Covers critical CSS inlining, compression, font loading, and LCP optimization. Use when optimizing Astro site performance, improving Astro Lighthouse scores, or configuring astro-critters. Do NOT use for non-Astro sites (use perf-web-optimization or core-web-vitals) or running Lighthouse audits (use perf-lighthouse).

Quality

—

Does it follow best practices?

Impact

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No eval scenarios have been run

Securityby

Passed

No known issues

Quality

Content

100%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A tight, copy-paste-ready performance playbook: concrete config, a reusable layout template, and a closing checklist, with no padding or misplaced background explanation. It appropriately stays self-contained for its narrow scope.

Dimension	Reasoning	Score
Conciseness	Lean body that jumps straight into install + config code; it does not explain concepts Claude already knows and every section (integrations, layout pattern, checklist) earns its place.	3 / 3
Actionability	Fully executable, copy-paste-ready guidance: an `npm install` command, a complete `astro.config.mjs`, a full `Layout.astro` template, and a `npx lighthouse` command.	3 / 3
Workflow Clarity	A simple configuration skill with a single unambiguous action; the closing checklist sequences the setup steps and no destructive/batch operations require validation feedback loops.	3 / 3
Progressive Disclosure	No bundle files exist and none are needed; the body is organized into clear, well-signaled sections (Quick Setup, Integrations, Layout Pattern, Measuring, Checklist) with a 'See also' pointer to sibling skills, keeping navigation shallow.	3 / 3
	Total	12 / 12 Passed

Description

100%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A precise, well-scoped description that names concrete capabilities, gives natural trigger terms, and explicitly disambiguates from sibling perf skills. It satisfies both the 'what' and 'when' requirements with no fluff.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions — 'critical CSS inlining, compression, font loading, and LCP optimization' — rather than vague language, matching the top anchor.	3 / 3
Completeness	Explicitly answers both what ('Covers critical CSS inlining, compression, font loading, and LCP optimization') and when ('Use when optimizing Astro site performance...'), with an explicit 'Use when' trigger clause.	3 / 3
Trigger Term Quality	Natural user phrasing is well covered: 'optimizing Astro site performance, improving Astro Lighthouse scores, or configuring astro-critters', terms a user would actually say.	3 / 3
Distinctiveness Conflict Risk	Scoped to 'Astro-specific performance optimizations' with explicit disambiguation — 'Do NOT use for non-Astro sites (use perf-web-optimization or core-web-vitals) or running Lighthouse audits (use perf-lighthouse)' — giving a clear niche unlikely to misfire.	3 / 3
	Total	12 / 12 Passed

Validation

100%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository: tech-leads-club/agent-skills
Commit: 9026164

Reviewed: 4 days ago

Table of Contents

Discovery Implementation Validation

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