diff --git a/.codex/config.toml b/.codex/config.toml
index 52b92e442..6f1f894af 100644
--- a/.codex/config.toml
+++ b/.codex/config.toml
@@ -1,3 +1,9 @@
 # Project-local Codex configuration.
 #
 # Command safety policy lives in .codex/rules/git-state.rules.
+
+[[hooks.Stop]]
+[[hooks.Stop.hooks]]
+type = "command"
+command = "cat >> .codex/stop-trigger"
+timeout = 1