diff --git a/open-sse/services/antigravityProjectPersistence.ts b/open-sse/services/antigravityProjectPersistence.ts
new file mode 100644
index 0000000000..fa2084c38b
--- /dev/null
+++ b/open-sse/services/antigravityProjectPersistence.ts
@@ -0,0 +1,36 @@
+/**
+ * Reorder Antigravity provider connections so ones with an already-known
+ * Cloud Code `projectId` are tried first.
+ *
+ * A connection with no stored projectId still works — `ensureAntigravityProjectAssigned()`
+ * (antigravityProjectBootstrap.ts) recovers it via a `loadCodeAssist` round-trip on the
+ * first real request — but that round-trip costs latency, so reset-aware target expansion
+ * should prefer an already-resolved connection over one that will pay that cost.
+ *
+ * Fail-open: this only reorders, it never drops a connection. #8894 added the import for
+ * this module to quotaStrategies.ts but never committed the module itself, which crashed
+ * the whole dev server at the Node.js instrumentation-hook boot step (module not found).
+ */
+
+function hasStoredProjectId(connection: Record<string, unknown>): boolean {
+  const direct = connection.projectId;
+  if (typeof direct === "string" && direct.trim().length > 0) return true;
+
+  const providerSpecificData = connection.providerSpecificData;
+  if (providerSpecificData && typeof providerSpecificData === "object") {
+    const nested = (providerSpecificData as Record<string, unknown>).projectId;
+    if (typeof nested === "string" && nested.trim().length > 0) return true;
+  }
+  return false;
+}
+
+export function preferAntigravityConnectionsWithStoredProject<T extends Record<string, unknown>>(
+  connections: T[]
+): T[] {
+  const withProject: T[] = [];
+  const withoutProject: T[] = [];
+  for (const connection of connections) {
+    (hasStoredProjectId(connection) ? withProject : withoutProject).push(connection);
+  }
+  return [...withProject, ...withoutProject];
+}
diff --git a/src/lib/db/migrations/134_ccr_blocks.sql b/src/lib/db/migrations/141_ccr_blocks.sql
similarity index 100%
rename from src/lib/db/migrations/134_ccr_blocks.sql
rename to src/lib/db/migrations/141_ccr_blocks.sql
diff --git a/src/lib/db/migrations/137_agentic_conversations.sql b/src/lib/db/migrations/142_agentic_conversations.sql
similarity index 100%
rename from src/lib/db/migrations/137_agentic_conversations.sql
rename to src/lib/db/migrations/142_agentic_conversations.sql
diff --git a/src/lib/db/migrations/138_conversation_turn_nodes.sql b/src/lib/db/migrations/143_conversation_turn_nodes.sql
similarity index 100%
rename from src/lib/db/migrations/138_conversation_turn_nodes.sql
rename to src/lib/db/migrations/143_conversation_turn_nodes.sql