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- Guard LoopFollowDebugCorner descriptor, template, and placeholder branches with #if DEBUG so the diagnostic complication does not ship to end users. - Remove unused LAAppGroupSettings.setWatchSlots / watchSlots (the fixed-4-slot variant superseded by watchSelectedSlots). - Move WatchConnectivityManager.swift from the repo root into LoopFollow/LiveActivity/ next to the rest of the snapshot pipeline and drop the duplicate file header. - Serialize WatchConnectivityManager.lastWatchAckTimestamp access through a dedicated state queue. send(snapshot:) may run on any thread and WCSession delegate callbacks arrive on a background queue, so the bare TimeInterval was racy. - Assert main-thread access for WatchSessionReceiver.cacheComplication and document the invariant on cachedComplications. - Drop the no-op JSONEncoder/JSONDecoder iso8601 date strategies — GlucoseSnapshot has a custom encoder/decoder that writes/reads updatedAt as a Double, so the strategy was never consulted. - Nit: replace `if let _ = snapshot.projected` with `if snapshot.projected != nil`. - Nit: comment why SlotSelectionView excludes .delta / .projectedBG. - Remove CLAUDE.md.
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Addresses the pre-merge review items on #594.
Blockers
LoopFollowDebugCornerbehind#if DEBUG. The diagnostic complication (snapshotupdatedAtvs. ClockKit timeline-entry time) was listed ingetComplicationDescriptorsunconditionally, so end users would see "LoopFollow Debug" in the complication picker. The descriptor, the two template builders (graphicCornerDebugTemplate, the stale/placeholder debug branches), andComplicationID.debugCorneritself are now all wrapped in#if DEBUG.LAAppGroupSettings.setWatchSlots(_:)/watchSlots(). The fixed-4-slot variant was superseded bywatchSelectedSlotsand had no callers. Deleted along with thewatch.slotskey.File layout
WatchConnectivityManager.swiftintoLoopFollow/LiveActivity/. It previously sat at the repo root in the top-level Xcode group. The file is still compiled into the main iOS app only; the rename just puts it next to the rest of the snapshot pipeline (GlucoseSnapshotStore,LiveActivityManager,GlucoseSnapshotBuilder,LAAppGroupSettings).project.pbxprojupdated to reference the new group membership.WatchConnectivityManager.swifthad both the standard// LoopFollow / // WatchConnectivityManager.swiftheader and a second// WatchConnectivityManager.swift / // Philippe Achkar / // 2026-03-10block. Collapsed to the single standard header the rest of the codebase uses.Thread-safety
WatchConnectivityManager.lastWatchAckTimestamp.send(snapshot:)is documented as safe to call from any thread, and WCSession delegate callbacks arrive on an arbitrary background queue, so the bareTimeIntervalwas read/written without synchronization. Reads and writes now go through a dedicatedstateQueue(DispatchQueue(label: "com.loopfollow.WatchConnectivityManager.state")). Exposed as a computed property so callers don't change.WatchSessionReceiver.cacheComplication. The caller contract was only a doc comment. Now enforced withdispatchPrecondition(condition: .onQueue(.main))and the invariant is repeated oncachedComplications.Nits
JSONEncoder.dateEncodingStrategy = .iso8601/JSONDecoder.dateDecodingStrategy = .iso8601lines inGlucoseSnapshotStore,WatchConnectivityManager,WatchSessionReceiver, andLoopFollowWatchApp.decodeContextSnapshot.GlucoseSnapshothas a custom encoder/decoder that writes and readsupdatedAtas aDoubledirectly, so the strategy was never consulted.ComplicationEntryBuilder:if let _ = snapshot.projected→if snapshot.projected != nil.ContentView.SlotSelectionView: add a one-line comment explaining why.deltaand.projectedBGare filtered out of the picker (they're always shown on the glucose page).Also
CLAUDE.md.Build:
xcodebuild -workspace LoopFollow.xcworkspace -scheme LoopFollow -destination 'platform=iOS Simulator,name=iPhone 17' build→ BUILD SUCCEEDED.