mangaBookmark/userscript/AGENTS.md

Guidance for OpenCode (and Claude Code) working under userscript/. See root AGENTS.md for the project-wide architecture diagram, hard constraints, and design system.

Userscript structure (single IIFE, manga-bookmark.user.js)

1. Site adapters — one per host, detect(location, document) return page type + IDs. Identify type/IDs from URL regex (most stable); pull title/cover from og:title/og:image meta tags, not CSS classes.
2. API client — apiGet/apiPut/apiDelete with bearer header; localStorage key mangabm:cache for instant render + offline fallback.
3. Progress logic — auto-upsert last_chapter only when chapterNum >= stored last_chapter_num (re-reading old chapters must not regress progress; unparseable -> set current). Manual panel override forces any value.
4. Retry queue — every write go through pushBookmark/pushDelete, so failed mutation park in localStorage (mangabm:queue) and replayed on next navigation, reconnect, or refresh(). Entries are markers ({key, op, sendStatus, attempts}), never payloads — body read from cache at send time, so one entry per key give ordering and coalescing for free. sendStatus is sticky: while archive pending, later writes to that key keep carrying bucket, which stop successful in-between write from silently un-archiving series. refresh() drains before it fetches and overlays anything still pending, so list never flaps. 400 drops entry, 401 abort pass and keep queue, and transient failures retry to cap of 10. Latest-chapter writes deliberately stay out of queue. See docs/superpowers/specs/2026-07-27-offline-retry-queue-design.md.
5. UI — rendered inside Shadow DOM root to isolate from site CSS (critical on mobile). Three tabs (All / Favourites / Archived) and row of link chips to web UI and both manga sites; WEB_BASE sits in CONFIG block next to API_BASE. FAB is 7 × 44 edge tab whose hit area widened to 28 × 72 by invisible #hit child; #fab must keep touch-action: none and must not regain overflow: hidden. Since touch-action resolved at gesture start, strip can't be both browser-scrolled and script-dragged, so makeDraggable splits by intent: swipe from #hit scrolls via window.scrollBy, hold of ARM_MS arms reposition drag, visible sliver drags with no hold. See docs/superpowers/specs/2026-07-28-edge-tab-hitbox-design.md.
6. SPA navigation — Asura is Astro, client-routed on comic/chapter pages: patch history.pushState/replaceState + listen popstate, re-run detect() on URL change so auto-update fire without reload. Demonic uses classic reloads (initial document-idle run suffice).

Live URL shapes (verified 2026-07-26, may drift — re-check against live pages before trust)

• asurascans.com: series /comics/<slug> (slug carries trailing site-wide build-hash suffix, e.g. -059befe1, that rotates on every redeploy), chapter /comics/<slug>/chapter/<n>. seriesId must strip hash (/-[0-9a-f]{8}$/, stripBuildHash in userscript, asuraBuildHash in backend); URLs keep full slug — stale-hash URLs 302 to current ones. Astro-rendered; chapter links present in raw server HTML.
• demonicscans.org: series /manga/<slug> (slug may URL-encode punctuation, e.g. %2527 for '), chapter /title/<slug>/chapter/<n>/<page> (older chaptered.php?manga=<id>&chapter=<n> form still exists as redirect, what series-page chapter-list anchors link through). Encodings (incl. triple-encoded punctuation like %25252D) identical on /manga/ and /title/ pages, so decode-once seriesIds match — verified 2026-07-28.