v1.0.2 - Install Guidance and Validator Hardening

Highlights

• Simplified README quick-start installation to the mainstream npx skills add ClawEnable/html-artifact-best-practices command.
• Clarified verified install paths for Claude Code and Codex while marking other agent environments as unverified.
• Updated Claude plugin marketplace installation to use html-artifact-guide@clawenable.
• Bumped Claude plugin metadata and marketplace metadata to 1.0.2.
• Tightened the standalone HTML validator to reject stylesheet links, script src attributes, and multiple style/script blocks.
• Expanded validator tests from 5 to 7 cases.
• Updated AGENTS.md and CLAUDE.md with current release gate guidance.

Validation

• node --test tests/validate-artifact.test.js
• node scripts/validate-artifact.js skills/html-artifact-guide/assets/standalone-template.html tests/fixtures/valid-artifact.html
• ! rg "Replace with|<title></title>" skills/html-artifact-guide/assets tests/fixtures/valid-artifact.html
• test "$(rg -c "expected_action" skills/html-artifact-guide/evals/trigger-scenarios.md)" -ge 20
• git diff --check
• claude plugin validate .claude-plugin/plugin.json
• claude plugin validate .claude-plugin/marketplace.json