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perf-lighthouse

Run Lighthouse audits locally via CLI or Node API, parse and interpret reports, and set performance budgets. Use when measuring site performance, understanding Lighthouse scores, setting up budgets, or integrating audits into CI. Triggers on: lighthouse, run lighthouse, lighthouse score, performance audit, performance budget. Do NOT use for fixing specific performance issues (use perf-web-optimization or core-web-vitals) or Astro-specific optimization (use perf-astro).

73

Quality

Does it follow best practices?

Impact

No eval scenarios have been run

SecuritybySnyk

Advisory

Suggest reviewing before use

SKILL.md
Quality
Evals
Security

Quality

Content

80%

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

The body is highly actionable and token-efficient with strong executable examples across CLI, Node API, CI, and parsing. Its main weakness is structure: a single dense file where detailed material could be offloaded to clearly signaled reference files, and workflows lack explicit validation checkpoints.

Suggestions

Move detailed reference material (e.g., the full lighthouserc.js config, budget.json schema, and the report-parsing API surface) into separate files under references/ and link to them with one-level-deep pointers to improve progressive disclosure.

Add explicit validation/feedback checkpoints to CI and comparison workflows (e.g., 'if assertion fails, exit non-zero and report which metric regressed before proceeding').

For the Compare Builds flow, number the steps and add an explicit pass/fail decision step so the sequence reads as a validated workflow rather than three commands.

DimensionReasoningScore

Conciseness

The body is lean and code-forward with no explanation of concepts Claude already knows; nearly every section is a runnable snippet or flag table that earns its tokens.

3 / 3

Actionability

Provides fully executable CLI commands, a complete Node API example, a GitHub Actions workflow, and copy-paste-ready JSON budget and parsing snippets.

3 / 3

Workflow Clarity

Sections are clearly grouped by use case and the Compare Builds section is sequenced, but there are no explicit validation checkpoints or error-recovery feedback loops for operations like budget assertion failures or CI gating.

2 / 3

Progressive Disclosure

Content is well-organized into sections but it is a ~230-line single-file monolith with no references directory; large referenceable material such as the full LHCI config and budget schema is inline rather than split into one-level-deep files.

2 / 3

Total

10

/

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.

The description is specific, complete, and well-differentiated with explicit triggers and exclusion guidance. It is concise yet covers what, when, and when-not-to-use clearly.

DimensionReasoningScore

Specificity

Lists multiple concrete actions ('Run Lighthouse audits locally via CLI or Node API, parse and interpret reports, and set performance budgets') rather than vague language.

3 / 3

Completeness

Explicitly states both what it does (run audits, parse reports, set budgets) and when to use it ('Use when measuring site performance, understanding Lighthouse scores, setting up budgets, or integrating audits into CI').

3 / 3

Trigger Term Quality

Explicit 'Triggers on: lighthouse, run lighthouse, lighthouse score, performance audit, performance budget' covers natural phrasings a user would say.

3 / 3

Distinctiveness Conflict Risk

Clear niche with a 'Do NOT use for...' clause distinguishing it from perf-web-optimization, core-web-vitals, and perf-astro, making mis-triggering unlikely.

3 / 3

Total

12

/

12

Passed

Validation

100%

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

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
tech-leads-club/agent-skills
Reviewed

Table of Contents

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