diff --git a/plans/README.md b/plans/README.md
index ab37e12..bbcf751 100644
--- a/plans/README.md
+++ b/plans/README.md
@@ -21,7 +21,7 @@ your row when done.
 | 003 | Money-path hardening — daily self-restart, positive-evidence contract, reconcile, cage count | P1 | M | 001 | DONE |
 | 004 | Learning flywheel — one population module, scheduled eod_replay + nightly_tune, atomic writes | P1 | M | 001 (002 rec.) | DONE |
 | 005 | Entry-path unification + decision receipts | P2 | M | 001, 003, 004 | DONE |
-| 006 | Experiment OS — pre-registered counterfactual experiments over logged fires (flagship) | P1 | L | 004 (005 rec.) | TODO |
+| 006 | Experiment OS — pre-registered counterfactual experiments over logged fires (flagship) | P1 | L | 004 (005 rec.) | DONE |
 | 007 | Operator control plane — dashboard truth + kill switch + effective config (step 1 = prod bug fix, ship early) | P2 | M | 001, 003 (006 for ledger data) | TODO |
 
 Status values: TODO | IN PROGRESS | DONE | BLOCKED (with one-line reason) | REJECTED (with one-line rationale)