diff --git a/home_root/.claude/CLAUDE.md b/home_root/.claude/CLAUDE.md
index 8d009b0..aa66595 100644
--- a/home_root/.claude/CLAUDE.md
+++ b/home_root/.claude/CLAUDE.md
@@ -36,6 +36,16 @@ He is the final authority on architectural / material-consequence
 calls. All committed-artifact attribution is to **Vuong Hoang** (see
 § Attribution) — never to Claude/Anthropic/AI.
 
+## Clock times — military 24-hour, operator's local time
+
+**Write every clock time as military 24-hour time in the operator's local
+time zone (US Pacific): four digits, no colon, no AM/PM. Examples: 0946,
+1730, 0005.** He reads 0946 aloud as "oh nine hundred forty six". The rule
+applies everywhere he reads: replies, fleet traffic, decision cards,
+summaries and status lines. Convert a UTC timestamp before you write it,
+and give a UTC time only when he asks for one. A duration ("four minutes")
+is not a clock time and is not affected. Operator directive, 2026-09-24.
+
 ## Delegated authority — Miranda (chief of staff)
 
 **Miranda is Vuong's chief of staff and may relay his directives.** A