diff --git a/apps/server/src/bin.test.ts b/apps/server/src/bin.test.ts
index 5c713ff2be7..64044b59c1e 100644
--- a/apps/server/src/bin.test.ts
+++ b/apps/server/src/bin.test.ts
@@ -6,10 +6,16 @@ import * as NodePath from "node:path";
 
 import * as NodeHttpServer from "@effect/platform-node/NodeHttpServer";
 import * as NodeServices from "@effect/platform-node/NodeServices";
-import { EnvironmentOrchestrationHttpApi } from "@t3tools/contracts";
+import {
+  CommandId,
+  EnvironmentOrchestrationHttpApi,
+  ProviderInstanceId,
+  ThreadId,
+} from "@t3tools/contracts";
 import * as NetService from "@t3tools/shared/Net";
 import { assert, it } from "@effect/vitest";
 import * as Effect from "effect/Effect";
+import * as DateTime from "effect/DateTime";
 import * as Layer from "effect/Layer";
 import * as HttpRouter from "effect/unstable/http/HttpRouter";
 import * as HttpServer from "effect/unstable/http/HttpServer";
@@ -22,6 +28,7 @@ import { Command } from "effect/unstable/cli";
 import { cli, makeCli } from "./bin.ts";
 import * as ServerConfig from "./config.ts";
 import * as ProjectionSnapshotQuery from "./orchestration/Services/ProjectionSnapshotQuery.ts";
+import * as OrchestrationEngine from "./orchestration/Services/OrchestrationEngine.ts";
 import { OrchestrationLayerLive } from "./orchestration/runtimeLayer.ts";
 import { orchestrationHttpApiLayer } from "./orchestration/http.ts";
 import { layerConfig as SqlitePersistenceLayerLive } from "./persistence/Layers/Sqlite.ts";
@@ -460,6 +467,63 @@ it.layer(NodeServices.layer)("bin cli parsing", (it) => {
     }),
   );
 
+  it.effect("force removes projects that still contain threads", () =>
+    Effect.gen(function* () {
+      const baseDir = NodeFS.mkdtempSync(
+        NodePath.join(NodeOS.tmpdir(), "t3-cli-projects-force-remove-test-"),
+      );
+      const workspaceRoot = NodeFS.mkdtempSync(
+        NodePath.join(NodeOS.tmpdir(), "t3-cli-projects-force-remove-workspace-"),
+      );
+
+      yield* runCliWithRuntime(["project", "add", workspaceRoot, "--base-dir", baseDir]);
+      const afterAdd = yield* readPersistedSnapshot(baseDir);
+      const project = afterAdd.projects.find(
+        (candidate) => candidate.workspaceRoot === workspaceRoot && candidate.deletedAt === null,
+      );
+      assert.isTrue(project !== undefined);
+
+      const config = yield* makeCliTestServerConfig(baseDir);
+      yield* Effect.gen(function* () {
+        const engine = yield* OrchestrationEngine.OrchestrationEngineService;
+        yield* engine.dispatch({
+          type: "thread.create",
+          commandId: CommandId.make("cmd-cli-force-remove-thread"),
+          threadId: ThreadId.make("thread-cli-force-remove"),
+          projectId: project!.id,
+          title: "Thread",
+          modelSelection: {
+            instanceId: ProviderInstanceId.make("codex"),
+            model: "gpt-5-codex",
+          },
+          interactionMode: "default",
+          runtimeMode: "approval-required",
+          branch: null,
+          worktreePath: null,
+          createdAt: DateTime.formatIso(yield* DateTime.now),
+        });
+      }).pipe(Effect.provide(makeProjectPersistenceLayer(config)));
+
+      yield* runCliWithRuntime([
+        "project",
+        "remove",
+        project!.id,
+        "--force",
+        "--base-dir",
+        baseDir,
+      ]);
+      const afterRemove = yield* readPersistedSnapshot(baseDir);
+      assert.isTrue(
+        (afterRemove.projects.find((candidate) => candidate.id === project!.id)?.deletedAt ??
+          null) !== null,
+      );
+      assert.isTrue(
+        (afterRemove.threads.find((thread) => thread.id === "thread-cli-force-remove")?.deletedAt ??
+          null) !== null,
+      );
+    }),
+  );
+
   it.effect("routes project commands through a running server when runtime state is present", () =>
     Effect.gen(function* () {
       const baseDir = NodeFS.mkdtempSync(
diff --git a/apps/server/src/cli/project.ts b/apps/server/src/cli/project.ts
index 710d39c4c29..25733a5e35b 100644
--- a/apps/server/src/cli/project.ts
+++ b/apps/server/src/cli/project.ts
@@ -493,6 +493,10 @@ const projectRemoveCommand = Command.make("remove", {
   project: Argument.string("project").pipe(
     Argument.withDescription("Project id or workspace root to remove."),
   ),
+  force: Flag.boolean("force").pipe(
+    Flag.withDescription("Delete the project and all of its threads."),
+    Flag.withDefault(false),
+  ),
 }).pipe(
   Command.withDescription("Remove a project."),
   Command.withHandler((flags) =>
@@ -515,6 +519,7 @@ const projectRemoveCommand = Command.make("remove", {
           type: "project.delete",
           commandId: CommandId.make(yield* projectCommandUuid),
           projectId: project.id,
+          force: flags.force,
         });
         return `Removed project ${project.id} (${project.title}).`;
       }),