sources 19-20 (NLR/РНБ Primo via CRW; RSL-Aleph direct WAU works / WTI+SYS empty); SWEEP-R7.md full surname results; Cunningham 2018; all 26 ❌ re-confirmed on independent NLR catalog

AGENTS.md

@@ -167,6 +167,28 @@ sections/0N-<name>/  # one .md per BOOK (chapter-level list items are merged int
 - Limits: Ozon and chitai-gorod search are API/anti-bot protected — CRW returns nothing.
 - Insales shops (castalia.ru) don't need it: product data is server-side JSON-LD (curl OK).
 
+### 19. NLR / РНБ (National Library of Russia) via Primo (primo.nlr.ru) + CRW
+- Tool: `tools/nlr.py "query"` — free-text search (all fields, words ANDed), page 1 (20 rows).
+- Search is client-rendered → the tool renders the `search.do?fn=search&ct=search&
+  vl(freeText0)=QUERY&vid=07NLR_VU1&mode=Basic&initialSearch=true` URL via CRW and parses
+  title/author/year/holding (+ doc IDs when the linked layout renders).
+- Full record (GOST description, incl. translators): CRW on
+  `display.do?tabs=detailsTab&ct=display&fn=search&doc=<07NLR_LMS#########>&displayMode=full&vid=07NLR_VU1`
+  (plain curl gives only the shell — details tab is XHR).
+- Value: complements RSL — own St. Petersburg holdings + GOST records; author rows carry
+  life dates and NLR auth IDs. Count line parsing is flaky — trust the parsed row list.
+- Verified 2026-07-09: all 35 section-04 surnames swept (see sections/04-pictures/SWEEP-R7.md).
+
+### 20. RSL direct (aleph.rsl.ru, Ex Libris Aleph) — PARTIAL
+- find-a flow works: GET /F/-?func=file&file_name=find-a → parse action URL (session token)
+  → POST func=find-b&find_code=WAU&request=<name> → results 10/page with pagination.
+- Full record: follow the result row's `full-set-set` link (session-dependent); gives
+  translator, series, ISBN, UDC (verified: Нойманн «Амур и Психея» МИФ 2024, ISBN
+  978-5-00214-519-5, пер. М. Виноградова).
+- Quirk: find_code WTI (title) and SYS (ISBN) return EMPTY 0-byte responses; only WAU
+  (author) reliably works so far. libgen proxy (tools/rsl.py) still covers title/ISBN queries.
+- search.rsl.ru — same catalog, Yii app, no JSON API found (2026-07-09).
+
 ## Not usable / low value
 - libgen biblioservice worldcat/googlebooks/isbndb/udc (broken on this mirror)
 - imaton.com (МААП educational publisher, not translations)