docs: audit + low-confidence doc live in <library>/../_logs/ now

AGENTS.md

@@ -238,7 +238,7 @@ never re-fetch them again):
    - **Weak tier**: when nothing reaches the threshold, a hit >= `WEAK_MIN`
      (0.50) is accepted but flagged low confidence - `[w]` in the plan,
      `confidence: low` in the audit, listed in
-     `<library>/sorter_low_confidence.txt`. Weak and tokenless adoptions
+     `sorter_low_confidence.txt` in the log dir (see below). Weak and tokenless adoptions
      require a shared non-generic token; tokenless normal adoption needs
      +0.08 (`TOKENLESS_BONUS`); cross-system adoption additionally needs
      token containment (`_token_contained`), because char-ratio lies
@@ -255,6 +255,11 @@ never re-fetch them again):
      full-catalog and different-faction adoptions need token
      containment (`_contained_somewhere`).
 
+   - **Bookkeeping location (fixed 2026-10-08)**: the audit and the
+     low-confidence doc are written to `<library>/../_logs/` by default
+     (`--audit` overrides) - never inside the library itself, because the
+     library may be a seeded torrent whose file set is frozen.
+
    The catalog deliberately covers all GW systems (needed for
    catalog-agnostic use) - wrong-system placement is prevented by matching
    discipline and the drop filter, not by shrinking the catalog.