sec04: Schaverien #16 refined (psyjournal variant titles, flibusta/livelib negatives); flibusta.su added as source (param=ask); CONTEXT quirks updated

AGENTS.md

@@ -99,7 +99,16 @@ sections/0N-<name>/  # one .md per BOOK (chapter-level list items are merged int
 - labirint.ru/books/<id> server-rendered w/ full specs (publisher, year, pages, ISBN, translator).
 - Ozon product pages: blocked from curl (redirect loop) — fetch_content also fails; use browser.
 
-### Not usable / low value
+#### 10. flibusta.su — big e-book library, server-rendered search
+- Search: `https://flibusta.su/booksearch/?ask=<query>` (param is **ask**, not query!)
+  HTML parsing: links `/book/<id>-<slug>` and `/author/<id>-<slug>`.
+- API endpoints are blocked on .su (api/search.php → 403, /jsonrpc → 404); flibusta.is unreachable.
+- Good for negative verification: author search returns all same-name authors (e.g. «Нойманн»
+  → 5 namesakes, no Эрих; «Амманн» → Кит/Даниэль, no Рут; «Паттис» → only С. Паттисон).
+- Verified 2026-07-09: no «Выявляющий образ», no «Число и время» (Franz), no «Сэндплей» titles,
+  no «Тайный мир рисунка» (Furth), no «Тест Дерево», no «Искусство и творческое бессознательное».
+
+## Not usable / low value
 - libgen biblioservice worldcat/googlebooks/isbndb/udc (broken on this mirror)
 - imaton.com (МААП educational publisher, not translations)
 - bookmate.com (403 bot protection), gtmarket.ru (JS app, no HTML content)