# demarkus-library — Roadmap & Resume

Pick-up-where-we-left-off doc. Authoritative plan is
[/plans/universe-library.md](/plans/universe-library.md); this tracks status and
the queued work. Build model: Opus 4.8 default, Fable 5 for load-bearing
transport/auth/concurrency design.

## Where we are (2026-06-11, end of session)

All merged to `main` (HEAD c4aab23):

- **Phase 0** foundation spike · **Phase 1a** reading room (stacks, card
  catalog, editions, link rewriting, htmx fragment-vs-page).
- **Phase 1b — library card: DONE.** Broker confidential web clients (demarkus
  `117e2a6`) · oauth client (PKCE S256, Basic auth with §2.3.1 escaping) ·
  server-side sessions + single-flight refresh · ctx threading on ports ·
  broker MCP `WorldGateway` with **per-reader pooled sessions** (1 request per
  read; fixed the live 429s) · login turnstile (/login, /login/start,
  /auth/callback, /logout; HX-Redirect for htmx) · composition-root swap
  `DEMARKUS_TRANSPORT=quic|broker` · native TLS serving for local e2e
  (mkcert + hosts-file recipe in journal 2026-06-11). **E2e verified live.**
- **Multi-world floor + federation** (fc4277c): (world, path) addressing,
  `/w/<world>/...` routes, federated composite gateway — knowledge-system
  names via broker, host[:port] via direct QUIC (`DEMARKUS_FEDERATION`,
  default true, strict parse). Read token never leaves home host (test-pinned).
  Cross-world mark:// links clickable; root hub = the floor.
- **Frontmatter strip** in markdown adapter (render-side mitigation).

## How to resume

```sh
cd ~/latebit/demarkus-library && go test ./... && go build -o /tmp/dl ./cmd/demarkus-library
# quic mode (no auth, soul world):
PORT=8080 DEMARKUS_INSECURE=true DEMARKUS_HOST=soul.demarkus.io \
  DEMARKUS_AUTH=<token from .mcp.json> /tmp/dl
# broker mode: env per config.go (BROKER_URL, CLIENT_ID/SECRET, REDIRECT_URI,
# WORLD=root, TLS_CERT/KEY for local https) — full recipe in journal 2026-06-11.
```

### File map (hexagonal — ADR 0002)

- `internal/core/{domain,port,service}` — entities, ports (ctx+world on every
  method), Read/Browse/History/Search
- `internal/adapter/inbound/web` — Echo handlers/routes (`/w/:world/...`),
  auth turnstile, session pkg, templates, links.go (cross-world rewriting)
- `internal/adapter/outbound/{world,broker,federated,oauth,markdown}` —
  direct QUIC (token→home only), MCP pool, shape-router, broker OAuth, goldmark
- `internal/adapter/bearer` — ctx token contract between middleware & gateway
- `cmd/demarkus-library` — composition root, AppConfig, brokerAuth shim

## Next sessions — queued work

### 1. Deploy manifests (next up)
Dockerfile + helm chart for the library, mirroring the broker chart's
conventions: Secret for `DEMARKUS_CLIENT_SECRET` + session cookie material,
ingress with TLS (native TLS serving stays a local-dev knob), env wiring per
`config.go`. Outcome: library in-cluster next to the broker; mkcert path
retired to dev-only.

### 2. Broker rate limit back down (deploy-side, demarkus repo)
`rateLimit.tokens` was raised to 60/min burst 30 during the 429 incident.
Reads are now 1 request each (session pool) — drop to ~30/min burst ~15 in
the broker AppSet values.

### 3. Rendering upgrades (full split in [debt.md](/demarkus-library/debt.md))
Order: (a) chroma syntax highlighting via goldmark-highlighting — server-side,
zero JS, biggest visible win; bluemonday must allow chroma spans/classes.
(b) GFM alerts + emoji extensions. (c) Later, islands: mermaid.js + KaTeX,
vendored, degradable (ADR 0003 concessions).

### 4. Phase 2 — restricted collections (per /plans/universe-library.md)
Per-world/per-path authorization surfaced in the reading room. Depends on
broker-side authz semantics — re-read the plan + broker `authz.go` first.

### Standing deferred
- Backlinks / "cited by" (needs graph crawl; viz deferred).
- `mark_worlds` enumeration tool on broker → generated floor page.
- Find + fix publishers that wrote metadata fences into bodies (strip is
  render-side mitigation only).
- Phase 3 cataloging desk (writes, CodeMirror island) · Phase 4 AI librarian
  (SSE) · Phase 5 public face.

## History (condensed — details in journals + ADRs)

- 2026-06-10: Phases 0 + 1a built and merged (PRs #1–2).
- 2026-06-11: Phase 1b planned ([plan](/demarkus-library/plans/phase-1b-web-sso.md),
  [ADR 0004](/demarkus-library/adr/0004-broker-web-sso.md) — broker loopback
  finding, device flow rejected, confidential web client chosen) and fully
  shipped (PRs #3–#9); floor + federation; frontmatter strip. Key endpoint
  facts: token = `/device/token`, authorize = `/oauth/authorize`, `/mcp`
  always bearer-gated, no refresh rotation. Gotchas in
  [debugging.md](/demarkus-library/debugging.md).

## Git / process notes

- Work on `feature/*` / `fix/*` branches. **Never auto-commit** — Fritz
  commits and opens PRs; CodeRabbit reviews via `.coderabbit.yaml`.
- PR scopes: domain, port, service, web, world, markdown, cmd, view, deps,
  ci, broker, auth, session, oauth, federated.