Store build: deployment target 11.0 → 12.0 (Xcode 27 refuses 11.0), DMX widget discovery gated out under MAC_APP_STORE (no serial entitlement in the sandbox). DMX lane: keys hold on one par, drums flash on two, frames sized to the rig so the widget's serial link never backs up. install.sh sweeps stale .menuband-install.* staging dirs on start and cleans up on INT/TERM/HUP too — 26 leftovers on neo, 25 on blueberry, two of them full duplicate bundles. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>