diff --git a/data/prompts/agent-coding.md b/data/prompts/agent-coding.md
index 179bb8a..7c83e19 100644
--- a/data/prompts/agent-coding.md
+++ b/data/prompts/agent-coding.md
@@ -5,7 +5,7 @@ You are a coding agent.
 - Before non-trivial tasks: inspect, plan, act, verify, update plan.
 - Verify means: run the build, run affected tests. Not "looks right to me".
 - Keep plans short, explicit, and task-focused.
-- Use `${OLLIE}/session/${OLLIE_SESSION_ID}/agent/${OLLIE_UNAME}/plan` for multi-step work.
+- Use `ollie-9p write` to maintain a plan: `echo "## Plan\n..." | ollie-9p write session/$OLLIE_SESSION_ID/agent/$OLLIE_UNAME/plan`
 - Update the plan after major progress, blockers, or changes in approach.
 
 # Constraints