Adds two single-file HTML artifacts:
- docs/canvases-feature.html — the canonical "what is this thing" doc.
Inline-SVG architecture diagram, the four renderer types with
payload examples, the three-tier extension model, the 18 paranoia
checks grouped into security/correctness/robustness, file map,
try-it recipe, roadmap, and deliberate non-goals.
- docs/canvases-codex-review-2026-05-06.html — review writeup of the
pass-13 codex findings (1 P2 file-diff cap, 1 P3 path parser
corner case). Includes the recommendation to fix the P2 in this
PR and defer the P3.
Both are self-contained: inline CSS, system fonts, light + dark mode
via prefers-color-scheme, no external CSS/JS/font CDN. Open offline,
attach to a PR, share over Slack.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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