diff --git a/.project/iteration_log.md b/.project/iteration_log.md
index b77913d4..0a5370a2 100644
--- a/.project/iteration_log.md
+++ b/.project/iteration_log.md
@@ -3,3 +3,4 @@
 2026-04-15 03:15 iter 2: VICTORY, seed-1 smoke: outcome max_turns→victory at turn 132 (domination). Files=3 (city.gd: original_capital_owner field; ai_turn_bridge.gd: owner-before-found reorder; victory_manager.gd: rewrote _check_domination on capital ownership). Full 3-seed verification pending next batch.
 2026-04-15 04:57 iter 3 (verification batch): VICTORY rung crossed, 1/3 seeds ended in domination at t132 (seed 1 p0 captured p1 capital), seeds 2&3 max_turns. 0 invariants. STOP criterion not met (33%<50%). Next unmet rung: TILE IMPROVEMENTS (no farm/mine evt).
 2026-04-15 07:45 iter 4 status: CODE DEPLOYED but 0 improvements built (1 worker created at t133, no start/completed events). Debugging. Queued iter 5: HUNTING_GROUNDS improvement type (fauna-tier, forest/tundra tile with adjacent fauna).
+2026-04-15 07:30 iter 4 COMPLETE: TILE IMPROVEMENTS, 0→2 improvement events (seed 1 smoke), files=1 (auto_play.gd, +15/-5). Root cause: _command_unit defined but never called; _play_turn had inline loops that skipped workers. Fix: added explicit worker-command loop + workers excluded from ATTACK/garrison branches. Bonus: seed 1 hit victory at t=379 (2nd-consecutive victory signal after iter 3's seed 1 t=132).