diff --git a/gitops/reuse.ymal b/gitops/reuse.ymal
index 02c0fd1e..ecd107d1 100644
--- a/gitops/reuse.ymal
+++ b/gitops/reuse.ymal
@@ -23,6 +23,8 @@ spec:
       services:
         - hwlab-cloud-api
         - hwlab-project-management
+        - hwlab-tasktree-api
+        - hwlab-tasktree-worker
         - hwlab-cloud-web
         - hwlab-gateway
         - hwlab-edge-proxy
@@ -138,6 +140,53 @@ spec:
           - package-lock.json
           - deploy/runtime/launcher/hwlab-env-reuse-launcher.ts
           - internal/dev-entrypoint/artifact-runtime.mjs
+    hwlab-tasktree-api:
+      runtimeReuse:
+        enabled: true
+        codeIdentity:
+          paths:
+            - cmd/hwlab-tasktree-api
+            - internal/tasktree
+            - tools/src/tasktree-cli.ts
+            - deploy/runtime/boot/hwlab-tasktree-api.sh
+        envIdentity:
+          paths:
+            - package.json
+            - package-lock.json
+            - deploy/runtime/launcher/hwlab-env-reuse-launcher.ts
+            - internal/dev-entrypoint/artifact-runtime.mjs
+      envReuse:
+        enabled: true
+        mode: env-reuse-git-mirror-checkout
+        nodeDepsPath: /opt/hwlab-env/node_modules
+        envIdentityFiles:
+          - package.json
+          - package-lock.json
+          - deploy/runtime/launcher/hwlab-env-reuse-launcher.ts
+          - internal/dev-entrypoint/artifact-runtime.mjs
+    hwlab-tasktree-worker:
+      runtimeReuse:
+        enabled: true
+        codeIdentity:
+          paths:
+            - cmd/hwlab-tasktree-worker
+            - internal/tasktree
+            - deploy/runtime/boot/hwlab-tasktree-worker.sh
+        envIdentity:
+          paths:
+            - package.json
+            - package-lock.json
+            - deploy/runtime/launcher/hwlab-env-reuse-launcher.ts
+            - internal/dev-entrypoint/artifact-runtime.mjs
+      envReuse:
+        enabled: true
+        mode: env-reuse-git-mirror-checkout
+        nodeDepsPath: /opt/hwlab-env/node_modules
+        envIdentityFiles:
+          - package.json
+          - package-lock.json
+          - deploy/runtime/launcher/hwlab-env-reuse-launcher.ts
+          - internal/dev-entrypoint/artifact-runtime.mjs
     hwlab-cloud-web:
       runtimeReuse:
         enabled: true
diff --git a/scripts/ci-plan.test.mjs b/scripts/ci-plan.test.mjs
index 964e280d..d1f47320 100644
--- a/scripts/ci-plan.test.mjs
+++ b/scripts/ci-plan.test.mjs
@@ -1483,6 +1483,38 @@ test("v03 planner reads env reuse declarations and catalog from v03 lane config"
   }
 });
 
+test("v03 TaskTree API and worker share one TypeScript environment artifact", async () => {
+  const reuse = await readStructuredFile(process.cwd(), "gitops/reuse.ymal");
+  const group = reuse.spec?.envArtifactGroups?.["hwlab-ts-runtime-env"];
+  const services = reuse.spec?.services ?? {};
+  const tasktreeServiceIds = ["hwlab-tasktree-api", "hwlab-tasktree-worker"];
+  const expectedEnvIdentity = [
+    "package.json",
+    "package-lock.json",
+    "deploy/runtime/launcher/hwlab-env-reuse-launcher.ts",
+    "internal/dev-entrypoint/artifact-runtime.mjs"
+  ];
+
+  assert.ok(group, "shared TypeScript environment group");
+  for (const serviceId of tasktreeServiceIds) {
+    assert.equal(group.services?.includes(serviceId), true, `${serviceId} shared environment membership`);
+    assert.deepEqual(services[serviceId]?.runtimeReuse?.envIdentity?.paths, expectedEnvIdentity, `${serviceId} runtime env identity`);
+    assert.deepEqual(services[serviceId]?.envReuse?.envIdentityFiles, expectedEnvIdentity, `${serviceId} env reuse identity`);
+    assert.equal(services[serviceId]?.envReuse?.mode, "env-reuse-git-mirror-checkout", `${serviceId} runtime mode`);
+  }
+  assert.deepEqual(services["hwlab-tasktree-api"].runtimeReuse.codeIdentity.paths, [
+    "cmd/hwlab-tasktree-api",
+    "internal/tasktree",
+    "tools/src/tasktree-cli.ts",
+    "deploy/runtime/boot/hwlab-tasktree-api.sh"
+  ]);
+  assert.deepEqual(services["hwlab-tasktree-worker"].runtimeReuse.codeIdentity.paths, [
+    "cmd/hwlab-tasktree-worker",
+    "internal/tasktree",
+    "deploy/runtime/boot/hwlab-tasktree-worker.sh"
+  ]);
+});
+
 test("v03 planner builds one shared Go env artifact for compatible Go services", async () => {
   const repo = await createFixtureRepo({ catalog: false });
   await addGoEnvReuseFixture(repo);