Exporters Builder

Use this skill when implementing export functions (CSS variables and JSON) and output formatting per v0.3 spec.

Workflow

1. Read src/planning/spec-v0.3.md and the relevant phase in src/planning/roadmap-v0.3.md.
2. Implement exporters in src/export with OutputOptions (precision, formats).
3. Ensure optional meta data is included only when requested.
4. Add minimal snapshot-like tests for CSS vars and JSON output.

Guardrails

• Preserve the public API surface for v0.3 (exportThemeCss, exportThemeJson).
• Keep output stable and deterministic (ordering, precision).