diff --git a/docs/journals/INDEX.md b/docs/journals/INDEX.md
index 5f0cf41..56a6d2a 100644
--- a/docs/journals/INDEX.md
+++ b/docs/journals/INDEX.md
@@ -10,4 +10,5 @@
 - 2026-05-11 — iter pr.1: plan-recon subagent → 2026-05-11-iter-pr.1.md
 - 2026-05-11 — iter or.2: orchestrator-agent design correction (no nested subagent dispatch) → 2026-05-11-iter-or.2.md
 - 2026-05-11 — iter cadence: audit/fieldtest/docwriter cadence restructure → 2026-05-11-iter-cadence.md
+- 2026-05-11 — iter 23.4-prep: checker prerequisites for prelude free fns → 2026-05-11-iter-23.4-prep.md
 - 2026-05-11 — iter gc.1: grounding-check agent + brainstorm Step 7.5 → 2026-05-11-iter-gc.1.md