diff --git a/REBUILD.md b/REBUILD.md
index 92ae921..20e31c0 100644
--- a/REBUILD.md
+++ b/REBUILD.md
@@ -203,3 +203,8 @@ c. Group list: editable, owner by priority number (above). **Accepted.**
 d. Reposts: separate releases in phase 1, merged in phase 2. **Accepted.**
 e. Headers through the coordinator's relay, with prefetch (part 1).
    **Accepted.**
+f. Random-named releases (no file with a readable name) keep no chunk in
+   the header pass: their file keys and probe candidates only, until
+   phase 2 names them (bodies) and fetches their segments again. The full
+   history is ~3 TB with them, ~1.2–1.4 TB without (725 M of the 1.25 B
+   kept files; LOG.md 2026-10-09). **Accepted** 2026-10-09, not built yet.