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+---
+name: "Consolidate is_permission_approval into chat::util"
+---
+
+# Refactor 440: Consolidate is_permission_approval into chat::util
+
+## Current State
+
+- TBD
+
+## Desired State
+
+Three copies of `is_permission_approval` exist across Slack (`chat/transport/slack/commands.rs`), WhatsApp (`chat/transport/whatsapp/commands.rs`), and Matrix (`chat/transport/matrix/bot/messages.rs`). The Slack and WhatsApp versions are identical; the Matrix version is a superset that also strips @mentions. Consolidate into a single `pub` function in `chat::util` using the Matrix superset behavior, then delete the 3 private copies.
+
+## Acceptance Criteria
+
+- [ ] Single pub fn is_permission_approval exists in chat::util
+- [ ] All 3 private copies are removed
+- [ ] Matrix @mention-stripping behavior is preserved in the shared version
+- [ ] All call sites use the shared version
+
+## Out of Scope
+
+- TBD