diff --git a/apps/server/src/orchestration/commandInvariants.test.ts b/apps/server/src/orchestration/commandInvariants.test.ts
index 9aaeba943423fc70274178f2f46b622882751f1c..93777c67d3e17bfd2bb504f9ae914b33dcdbf18e 100644
--- a/apps/server/src/orchestration/commandInvariants.test.ts
+++ b/apps/server/src/orchestration/commandInvariants.test.ts
@@ -11,12 +11,7 @@ import {
 } from "@t3tools/contracts";
 import * as Effect from "effect/Effect";
 
-import {
-  findThreadById,
-  listThreadsByProjectId,
-  requireThread,
-  requireThreadAbsent,
-} from "./commandInvariants.ts";
+import { listThreadsByProjectId, requireThread, requireThreadAbsent } from "./commandInvariants.ts";
 
 const now = "2026-01-01T00:00:00.000Z";
 
@@ -121,9 +116,7 @@ const messageSendCommand: OrchestrationCommand = {
 };
 
 describe("commandInvariants", () => {
-  it("finds threads by id and project", () => {
-    expect(findThreadById(readModel, ThreadId.make("thread-1"))?.projectId).toBe("project-a");
-    expect(findThreadById(readModel, ThreadId.make("missing"))).toBeUndefined();
+  it("lists threads by project", () => {
     expect(
       listThreadsByProjectId(readModel, ProjectId.make("project-b")).map((thread) => thread.id),
     ).toEqual([ThreadId.make("thread-2")]);
diff --git a/apps/server/src/orchestration/commandInvariants.ts b/apps/server/src/orchestration/commandInvariants.ts
index beaad93d5eefa0cb9f4025f2f4b72490af2f7777..110a499d37c92b63b6fe8adc0bcdebd8aafad8e5 100644
--- a/apps/server/src/orchestration/commandInvariants.ts
+++ b/apps/server/src/orchestration/commandInvariants.ts
@@ -18,7 +18,7 @@ function invariantError(commandType: string, detail: string): OrchestrationComma
   });
 }
 
-export function findThreadById(
+function findThreadById(
   readModel: OrchestrationReadModel,
   threadId: ThreadId,
 ): OrchestrationThread | undefined {