Winning Web Speed Hackathon

Systematic workflow to maximize Lighthouse scores in CyberAgent's Web Speed Hackathon. The competition provides a deliberately de-tuned React + Node.js app; your job is to optimize it while passing VRT and regulation checks.

Use this skill when participating in Web Speed Hackathon, or aggressively optimizing a React/Node.js web app for Lighthouse Performance scores.

Scoring Model

Lighthouse v10 Performance scoring weights per page:

• FCP x10 | SI x10 | LCP x25 | TBT x30 | CLS x25

User flow scoring: TBT x25 + INP x25

LCP and TBT dominate. Prioritize accordingly.

Phase 0: Reconnaissance (First 30 min)