core-web-vitals

core-web-vitals18 wordsCuratedinstall-now-after-trust-gate

Curated third-party skill source. Run external-skill-auditor before repo promotion.

Quick Start

Install:

npx skills add addyosmani/web-quality-skills --skill web-quality-audit --skill accessibility --skill seo --skill performance --skill core-web-vitals --skill best-practices -y -g -a antigravity claude-code codex crush cursor gemini-cli github-copilot grok opencode

Use: /core-web-vitals

Works with Claude Code, Gemini CLI, OpenCode, and other agentskills.io-compatible agents.

Curated external (hand-maintained)

Composed compose-external-wave-3 using authoring SSOT (docs/src/authoring/skills/core-web-vitals.mdx) + research. Do not run wagents docs generate on this file (HAND-MAINTAINED sentinel). Run external-skill-auditor before using in production or promoting.

What It Does

Specialized for LCP, INP, CLS (the three CWV affecting Google ranking). Thresholds: LCP<=2.5s, INP<=200ms, CLS<=0.1. Trigger phrases reference specific metrics or “page experience”. Deep focus within the broader performance skill.

Harness Coverage

Targets verified harnesses: antigravity, claude-code, codex, crush, cursor, gemini-cli, github-copilot, grok, opencode.

Portable multi-harness install command:

npx skills add addyosmani/web-quality-skills --skill web-quality-audit --skill accessibility --skill seo --skill performance --skill core-web-vitals --skill best-practices -y -g -a antigravity claude-code codex crush cursor gemini-cli github-copilot grok opencode

Trust / Audit

Trust tier: Curated (curated-trust-gated)

Curated status: install-now-after-trust-gate

Risk notes: Curated third-party skill source. Run external-skill-auditor before repo promotion.

Entry maintained via authoring + research for compose-external-wave-3; provenance and audit notes are authoritative there (research context is advisory).

Install Prerequisites

npx skills add addyosmani/web-quality-skills --skill core-web-vitals -y -g -a antigravity claude-code codex crush cursor gemini-cli github-copilot grok opencode. status=install-now-after-trust-gate; selector=named (group install supports multiple). Supports Claude plugin, Codex marketplace, Gemini extensions, manual copy.

Public Metadata

Field	Value
Source Type	curated-external
Display Source	addyosmani/web-quality-skills
Source Kind	github
Installability	portable command
Review State	curated
Trust Tier	curated-trust-gated
Target Agents	antigravity, claude-code, codex, crush, cursor, gemini-cli, github-copilot, grok, opencode

General

Field	Value
Name	core-web-vitals

Curated catalog entry

docs/src/authoring/skills/core-web-vitals.mdx (full SSOT excerpt)

---
name: "core-web-vitals"
description: "Curated third-party skill source. Run external-skill-auditor before repo promotion."
title: "Core Web Vitals"
source_kind: "curated-external"
source: "addyosmani/web-quality-skills"
install_source: "addyosmani/web-quality-skills"
status: "install-now-after-trust-gate"
trust_tier: "curated-trust-gated"
provenance_status: "verified-install-command"
install_command: "npx skills add addyosmani/web-quality-skills --skill web-quality-audit --skill accessibility --skill seo --skill performance --skill core-web-vitals --skill best-practices -y -g -a antigravity claude-code codex crush cursor gemini-cli github-copilot grok opencode"
target_agents: [antigravity, claude-code, codex, crush, cursor, gemini-cli, github-copilot, grok, opencode]
source_url: "https://github.com/addyosmani/web-quality-skills"
notes: "Curated third-party skill source. Run external-skill-auditor before repo promotion."
risk_notes: "Curated third-party skill source. Run external-skill-auditor before repo promotion."
promotion_policy: "Install only after trust gate; audit again before repo promotion."
provenance_evidence: "Curated `npx skills add` command with named `--skill` selectors under `install-now-after-trust-gate` in config/external-skills.md."
---

{/* GENERATED-AUTHORING: source=config/external-skills.md; entry=core-web-vitals; re-run migration to refresh */}

Curated third-party skill source. Run external-skill-auditor before repo promotion.

Install / provenance (from authoring frontmatter + research):

Field	Value
install_command	npx skills add addyosmani/web-quality-skills --skill web-quality-audit --skill accessibility --skill seo --skill performance --skill core-web-vitals --skill best-practices -y -g -a antigravity claude-code codex crush cursor gemini-cli github-copilot grok opencode
source	addyosmani/web-quality-skills
source_url	https://github.com/addyosmani/web-quality-skills
trust_tier	curated-trust-gated
curated_status	install-now-after-trust-gate
target_agents	antigravity, claude-code, codex, crush, cursor, gemini-cli, github-copilot, grok, opencode

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