diff --git a/Where/WhereCore/Sources/Journal/DayJournal.swift b/Where/WhereCore/Sources/Journal/DayJournal.swift
index c2e9a7e1..50ad6ab2 100644
--- a/Where/WhereCore/Sources/Journal/DayJournal.swift
+++ b/Where/WhereCore/Sources/Journal/DayJournal.swift
@@ -49,11 +49,26 @@ public actor DayJournal {
     /// The scanner is invalidated inline (not just via its async store-change
     /// observation) so the reconciles below recount from fresh data rather than
     /// racing it.
+    private func execute(_ plan: PostWriteReconcilePlan) async {
+        for step in plan.steps {
+            switch step {
+                case .invalidateIssues:
+                    await issueScanner.invalidate()
+                case .reconcileReminders:
+                    await reminders.reconcile()
+                case .reconcileIssueAlerts:
+                    await issueAlerts.reconcile()
+                case .publishWidgets:
+                    await widgets.publish()
+                case let .publishWidgetsAfterIngest(sample):
+                    await widgets.publishAfterIngest(of: sample)
+            }
+        }
+    }
+
     private func reconcileIssueState() async {
         await Self.logger.measure(.reconcileIssueState, budget: .seconds(3)) {
-            await issueScanner.invalidate()
-            await reminders.reconcile()
-            await issueAlerts.reconcile()
+            await execute(PostWriteReconcilePlan.forOutcome(.issueOnly))
         }
     }
 
@@ -64,16 +79,14 @@ public actor DayJournal {
     /// root points at this method via `BackupCoordinator`'s `onImport` hook.
     func reconcileAfterDayDataChange() async {
         await Self.logger.measure(.reconcileAfterDayDataChange, budget: .seconds(5)) {
-            await reconcileIssueState()
-            await widgets.publish()
+            await execute(PostWriteReconcilePlan.forOutcome(.dayDataChanged))
         }
     }
 
     /// Reminder/issue fan-out plus the hot-path widget policy: skip a rebuild
     /// when the sample cannot change what widgets show (same day + region).
     private func reconcileAfterSampleIngest(_ sample: LocationSample) async {
-        await reconcileIssueState()
-        await widgets.publishAfterIngest(of: sample)
+        await execute(PostWriteReconcilePlan.forOutcome(.sampleIngest(sample)))
     }
 
     // MARK: - Ingestion
diff --git a/Where/WhereCore/Sources/Journal/PostWriteReconcilePlan.swift b/Where/WhereCore/Sources/Journal/PostWriteReconcilePlan.swift
new file mode 100644
index 00000000..31afcd0b
--- /dev/null
+++ b/Where/WhereCore/Sources/Journal/PostWriteReconcilePlan.swift
@@ -0,0 +1,50 @@
+import Foundation
+
+/// What kind of store write just committed — drives the post-write fan-out plan in
+/// [`PostWriteReconcile`](../../Specifications/PostWriteReconcile/README.md).
+public enum PostWriteOutcome: Equatable, Sendable {
+    /// A single GPS sample append (live ingest or manual sample).
+    case sampleIngest(LocationSample)
+    /// Persisted day-level data changed (manual day, bulk ingest, clears, import).
+    case dayDataChanged
+    /// Issue dismiss/restore — recount badge/notification only.
+    case issueOnly
+}
+
+/// One step in the sequential fan-out after a committed write.
+public enum ReconcileStep: Equatable, Sendable {
+    case invalidateIssues
+    case reconcileReminders
+    case reconcileIssueAlerts
+    case publishWidgets
+    case publishWidgetsAfterIngest(LocationSample)
+}
+
+/// Declarative post-write pipeline derived from ``PostWriteOutcome``.
+///
+/// Execution stays in ``DayJournal``; this type is the digest the TLA
+/// `reconcilePhase` sequence maps to.
+public struct PostWriteReconcilePlan: Equatable, Sendable {
+    public let steps: [ReconcileStep]
+
+    public init(steps: [ReconcileStep]) {
+        self.steps = steps
+    }
+
+    public static func forOutcome(_ outcome: PostWriteOutcome) -> PostWriteReconcilePlan {
+        let issueSteps: [ReconcileStep] = [
+            .invalidateIssues,
+            .reconcileReminders,
+            .reconcileIssueAlerts,
+        ]
+        switch outcome {
+            case .issueOnly:
+                return PostWriteReconcilePlan(steps: issueSteps)
+            case let .sampleIngest(sample):
+                return PostWriteReconcilePlan(steps: issueSteps +
+                    [.publishWidgetsAfterIngest(sample)])
+            case .dayDataChanged:
+                return PostWriteReconcilePlan(steps: issueSteps + [.publishWidgets])
+        }
+    }
+}
diff --git a/Where/WhereCore/Tests/PostWriteReconcilePlanTests.swift b/Where/WhereCore/Tests/PostWriteReconcilePlanTests.swift
new file mode 100644
index 00000000..d76247c3
--- /dev/null
+++ b/Where/WhereCore/Tests/PostWriteReconcilePlanTests.swift
@@ -0,0 +1,44 @@
+import Foundation
+import RegionKit
+import Testing
+import WhereCore
+
+/// Mirrors [`PostWriteReconcile`](../../Specifications/PostWriteReconcile/README.md)
+/// fan-out tiers on the pure plan layer.
+struct PostWriteReconcilePlanTests {
+    private let issueSteps: [ReconcileStep] = [
+        .invalidateIssues,
+        .reconcileReminders,
+        .reconcileIssueAlerts,
+    ]
+
+    @Test func issueOnlyOmitsWidgetPublish() {
+        let plan = PostWriteReconcilePlan.forOutcome(.issueOnly)
+        #expect(plan.steps == issueSteps)
+    }
+
+    @Test func dayDataChangedAppendsFullWidgetPublish() {
+        let plan = PostWriteReconcilePlan.forOutcome(.dayDataChanged)
+        #expect(plan.steps == issueSteps + [.publishWidgets])
+    }
+
+    @Test func sampleIngestUsesAfterIngestWidgetPolicy() {
+        let sample = LocationSample(
+            timestamp: Date(timeIntervalSince1970: 1_735_689_600),
+            coordinate: Coordinate(latitude: 37.78, longitude: -122.42),
+            horizontalAccuracy: 10,
+            source: .gpsSignificantChange,
+        )
+        let plan = PostWriteReconcilePlan.forOutcome(.sampleIngest(sample))
+        #expect(plan.steps == issueSteps + [.publishWidgetsAfterIngest(sample)])
+    }
+
+    @Test func bulkAndManualDayPathsShareDayDataPlan() {
+        let dayPlan = PostWriteReconcilePlan.forOutcome(.dayDataChanged)
+        #expect(dayPlan.steps.last == .publishWidgets)
+        #expect(!dayPlan.steps.contains { step in
+            if case .publishWidgetsAfterIngest = step { return true }
+            return false
+        })
+    }
+}