diff --git a/CLAUDE.md b/CLAUDE.md
index 959a77e..ed72162 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -146,3 +146,19 @@ Specs: `docs/working/specs/YYYY-MM-DD-<topic>-design.md`
 Plans: `docs/working/plans/YYYY-MM-DD-<topic>.md`
 
 The brainstorming and writing-plans skills default to `docs/superpowers/`; these lines override that default.
+
+### Plan status convention
+
+Every plan in `docs/working/plans/` must have a `**Status:**` line immediately after the title heading:
+
+| Status | Meaning |
+|---|---|
+| `📋 Not started` | Plan written; work not yet begun |
+| `🔄 In progress — <note>` | Actively being worked on |
+| `⏸️ Deferred — <reason>` | Intentionally postponed |
+| `✅ Complete (YYYY-MM-DD)` | Done |
+| `❌ Abandoned — <reason>` | Won't implement |
+
+**When asked what's open:** surface `Not started` and `In progress` plans. Show `Deferred` plans but label them clearly. Omit `Complete` and `Abandoned` unless explicitly asked.
+
+**When finishing a plan:** update the `**Status:**` field in the plan file to `✅ Complete (YYYY-MM-DD)` before closing the session. This applies whether execution was done by Claude directly, via the superpowers:executing-plans skill, or via superpowers:subagent-driven-development.