demarkus-library — Debt & Deferred Work

Technical debt and consciously deferred improvements.

Reading-room rendering upgrades (inspired by markdownviewer.pages.dev)

Capabilities to absorb, NOT the tool (it's a client-side editor — inverse architecture). Split along ADR 0003:

Server-side, zero JS (do first): syntax highlighting via goldmark-highlighting/chroma; GFM alerts; emoji extension. Bluemonday policy must allow chroma classes/spans.
JS islands (tracked ADR 0003 concessions): mermaid.js island (degrades to <pre> code block); KaTeX island (degrades to TeX source). Vendored like htmx, no CDN.
Editor/split/export = Phase 3 cataloging desk (CodeMirror island already in the plan) — not a bolt-on.

Per-reader MCP session pool: idle eviction is lazy/inline; if pool churn ever matters, consider background sweep + metrics.
Broker rateLimit.tokens raised to 60/min during 429 incident — drop to ~30/min now that reads are 1 request (deploy-side).
mark_worlds enumeration tool on the broker would enable a generated floor page (today the root hub serves by convention).
Frontmatter strip is render-side only; the publishers that wrote metadata fences into bodies should be found and fixed at source.