diff --git a/AGENTS.md b/AGENTS.md
index b0b4734..3e3a794 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -82,6 +82,12 @@ sections/0N-<name>/  # one .md per BOOK (chapter-level list items are merged int
     **Migration DONE 2026-09-21** (219/219 cards, `tools/migrate_cards_v3.py`, linter
   `tools/check-md.py` = 0 issues; Downloads tables rebuilt from MANIFESTs; sec04 #22 = ES section).
   New cards (sec05+) start on v3.
+- **SECTION FILES UNIFICATION DONE 2026-09-21** (order: MANIFEST → INDEX → MISSING → SUMMARY →
+  dossiers; scripts: `tools/migrate_manifests.py`, `migrate_indexes.py`, `make_authors_table.py`,
+  `restructure_summary.py`, `migrate_dossiers.py`). Findings baked in: sec01 +4 missing EN files
+  (ia byte-verified), sec04 Red Book +4 files, libgen f_ids recovered from queue logs,
+  136 card DL sources normalized, MISSING anchors = card gate refs (17+34+30+27), living authors
+  keep open-ended dates `[1951-]`.
 - **Section file CANONS v1 (agreed 2026-09-21, migration in order: MANIFEST → INDEX → MISSING → SUMMARY → dossiers):**
   **SUMMARY.md:** H1 `# Section NN — <Name>: summary (<date>)` → `## Final counts` (одна строка:
   статусы + файлы) → `## Publication status at a glance` (ОБЯЗАТЕЛЬНЫЙ, колонки `# | EN book | EN ISBN