Knowledge Graph: "Built in the open"

This very vault, rendered on the site as an interactive Obsidian-style graph. The "I document / I reason" meta-proof of North Star - Site as Proof. Decision: D010 - Knowledge Graph Build in the Open.

Architecture: /brain vault (.md + [[wikilinks]] + frontmatter) → build-time parser (gray-matter + remark) → graph.json + note HTML + backlinks → /brain graph island + /brain/[slug] pages

Render: d3-force on custom <canvas>, node size by degree, color by note type, hover highlights neighbors + dims rest, pan/zoom/drag, tag filter. (react-force-graph-2d is the faster alt.)
Accessibility: every note is a crawlable HTML page reachable via a list/tree fallback; reduced-motion → static pre-computed layout; canvas aria-hidden.
SEO: notes in the sitemap + AI-crawler-visible → your reasoning becomes citable (D009 - SEO and AI Crawlers).
Opens in real Obsidian, the /brain folder is a genuine vault.

Living-doc discipline: one note per decision, created when made. This node graph you're reading is the feature.