Perf

Skill Dragoon0x/dragoon-skills/skills/perf

design intelligence for ai coding agents. one unified cli, 36 commands across recon, review, build, plan, ship, test, reflect, power. zero npm deps.

Install

npx -y skills add Dragoon0x/dragoon-skills --skill perf

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What its author says it does

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Static performance hints (large images, missing img dimensions, no loading=lazy, sync script tags) plus optional Lighthouse JSON report ingestion that surfaces failing audits ranked by potential ms savings. Use when the user wants to audit web performance or process a Lighthouse report. Dragoon does NOT run Lighthouse itself - generate the report with `npx lighthouse <url> --output json --output-path lh.json` and pass --lighthouse. Run as `node ~/.claude/skills/dragoon/skills/perf/scripts/perf.js [--lighthouse path]`.

SKILL.md

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/perf

Two halves: static hints from your codebase, and parsing of Lighthouse JSON reports.

When to use

The user wants to audit web performance
After running Lighthouse, to surface the most impactful audits
Before launch, to catch image and script issues early

Static rules

perf-001 large-image (>500KB) (medium)
perf-002 img-missing-dimensions causes CLS (low)
perf-003 img-without-loading-lazy below the fold (low)
perf-004 sync-script-tag blocks parsing (medium)

Lighthouse ingestion

npx lighthouse https://example.com --output json --output-path lh.json
dragoon perf --lighthouse lh.json

Output: scores per category, core web vitals (LCP/CLS/TBT/INP/FCP/SI), and the top 6 failing audits ranked by ms savings.

Run it

dragoon perf                                # static only
dragoon perf --lighthouse lh.json           # add lighthouse summary
dragoon perf --severity medium              # filter
dragoon perf --json                         # CI mode