diff --git a/docs/atproto-digest/TODO.md b/docs/atproto-digest/TODO.md
index 6c348cc..3809622 100644
--- a/docs/atproto-digest/TODO.md
+++ b/docs/atproto-digest/TODO.md
@@ -31,10 +31,10 @@ D5=b (2 skills/session, HARD STOP after skill 2).
       notifications firehose).
 - [x] atproto-pds-ops (provisioning, monitoring, migration, backup).
 
-## Phase 4 — Skill pair 3
+## Phase 4 — Skill pair 3 (DONE 2026-08-17)
 
-- [ ] atproto-lexicon-registry (registries, authoring, discovery).
-- [ ] atproto-identity-deep (did:web via goat, PLC replica + audit, passkey rotation).
+- [x] atproto-lexicon-registry (registries, authoring, discovery).
+- [x] atproto-identity-deep (did:web via goat, PLC replica + audit, passkey rotation).
 
 ## Phase 5 — Skill pair 4