Add two documentation pages to the site:
- site/docs/quickstart.html — prerequisites, disinto init walkthrough,
first issue lifecycle demo
- site/docs/architecture.html — agent loop diagram, phase protocol,
vault/quality gate, planner+predictor feedback cycle
Both pages are linked from the landing page navigation and footer.
Sitemap updated with new URLs.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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