From babc9a8096a2fa13be3dbda3c873db605035dadb Mon Sep 17 00:00:00 2001
From: Andreas Schneider <aksdb@gmx.de>
Date: Thu, 20 Aug 2026 16:42:08 +0200
Subject: [PATCH] =?UTF-8?q?=F0=9F=A7=AA=20Reproduce=20failing=20sync=20fro?=
 =?UTF-8?q?m=20zero?=
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---
 internal/store/sync_store_test.go | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/internal/store/sync_store_test.go b/internal/store/sync_store_test.go
index b6da3b4..5da33ef 100644
--- a/internal/store/sync_store_test.go
+++ b/internal/store/sync_store_test.go
@@ -83,6 +83,33 @@ func TestSyncPruneStaleClient(t *testing.T) {
 	}
 }
 
+func TestSyncBootstrapAfterPruneReturnsLatestData(t *testing.T) {
+	s := mustSyncStore(t)
+	ctx := context.Background()
+
+	old := &domain.Entry{ID: "old", DayKey: "2026-01-01", UpdatedAt: time.Now().Add(-31 * 24 * time.Hour).UnixMilli()}
+	latest := &domain.Entry{ID: "latest", DayKey: "2026-02-01", UpdatedAt: time.Now().UnixMilli()}
+	if err := s.LogEntry(ctx, old); err != nil {
+		t.Fatal(err)
+	}
+	if err := s.Prune(ctx, -time.Millisecond); err != nil {
+		t.Fatal(err)
+	}
+	if err := s.LogEntry(ctx, latest); err != nil {
+		t.Fatal(err)
+	}
+
+	// A zero-version client has no history to reconcile. It should receive
+	// current data rather than being rejected because older history was pruned.
+	changes, _, err := s.Pull(ctx, 0)
+	if err != nil {
+		t.Fatalf("bootstrap should return latest data after pruning, got %v", err)
+	}
+	if len(changes) != 1 || changes[0].EntityID != "latest" {
+		t.Fatalf("expected only latest data, got %+v", changes)
+	}
+}
+
 func TestSyncPruneNoRows(t *testing.T) {
 	s := mustSyncStore(t)
 	ctx := context.Background()