diff --git a/config/opencode/commands/workflow.md b/config/opencode/commands/workflow.md
index 2402427..f1b21ae 100644
--- a/config/opencode/commands/workflow.md
+++ b/config/opencode/commands/workflow.md
@@ -323,7 +323,7 @@ The workflow is forge-agnostic. It commits locally and stops. **Do not push, and
 
 ### Local Summary
 - Write `.opencode/workflow-summary.md` in the worktree with:
-  - Run timestamp
+  - **Run timestamp** — capture it from the shell at write time: `date -Iseconds` (e.g. `2026-05-07T11:24:13+02:00`). **Do not** use a placeholder like `???:???:??` or "session date" — if you cannot get a real timestamp, omit the field entirely rather than fabricating one.
   - Issue reference and title
   - Branch name and final commit SHA(s)
   - Summary of implementation