diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e29d964..60fc197 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -751,6 +751,12 @@ importers:
       '@repo/core-eslint':
         specifier: workspace:*
         version: link:../../packages/core-eslint
+      '@repo/core-typescript':
+        specifier: workspace:*
+        version: link:../../packages/core-typescript
+      typescript:
+        specifier: ^5.8.0
+        version: 5.9.3
       vitest:
         specifier: ^3.1.0
         version: 3.2.4(@types/debug@4.1.13)(@types/node@25.5.2)(happy-dom@20.8.9)(jiti@2.6.1)(jsdom@25.0.1)(lightningcss@1.32.0)(sass@1.99.0)(terser@5.46.2)(tsx@4.21.0)
diff --git a/turbo/generators/__tests__/core-package-events.e2e.test.ts b/turbo/generators/__tests__/core-package-events.e2e.test.ts
index e5b7c1e..8c7fbf0 100644
--- a/turbo/generators/__tests__/core-package-events.e2e.test.ts
+++ b/turbo/generators/__tests__/core-package-events.e2e.test.ts
@@ -4,8 +4,8 @@ import { tmpdir } from "node:os";
 import { execSync } from "node:child_process";
 import { join, resolve } from "node:path";
 import { fileURLToPath } from "node:url";
-import { computeSnapshot } from "../lib/snapshot";
-import expectedSnapshot from "../__snapshots__/core-package/events.snapshot.json";
+import { computeSnapshot } from "../lib/snapshot.js";
+import expectedSnapshot from "../__snapshots__/core-package/events.snapshot.json" with { type: "json" };
 
 // Repo root is 2 levels up from turbo/generators/__tests__
 const REPO_ROOT = resolve(fileURLToPath(import.meta.url), "..", "..", "..", "..");
diff --git a/turbo/generators/__tests__/core-package-realtime.e2e.test.ts b/turbo/generators/__tests__/core-package-realtime.e2e.test.ts
index 7fe157d..d976b44 100644
--- a/turbo/generators/__tests__/core-package-realtime.e2e.test.ts
+++ b/turbo/generators/__tests__/core-package-realtime.e2e.test.ts
@@ -4,8 +4,8 @@ import { tmpdir } from "node:os";
 import { execSync } from "node:child_process";
 import { join, resolve } from "node:path";
 import { fileURLToPath } from "node:url";
-import { computeSnapshot } from "../lib/snapshot";
-import expectedSnapshot from "../__snapshots__/core-package/realtime.snapshot.json";
+import { computeSnapshot } from "../lib/snapshot.js";
+import expectedSnapshot from "../__snapshots__/core-package/realtime.snapshot.json" with { type: "json" };
 
 // Repo root is 2 levels up from turbo/generators/__tests__
 const REPO_ROOT = resolve(fileURLToPath(import.meta.url), "..", "..", "..", "..");
diff --git a/turbo/generators/__tests__/core-package-trpc.e2e.test.ts b/turbo/generators/__tests__/core-package-trpc.e2e.test.ts
index 60310a8..55774e3 100644
--- a/turbo/generators/__tests__/core-package-trpc.e2e.test.ts
+++ b/turbo/generators/__tests__/core-package-trpc.e2e.test.ts
@@ -4,8 +4,8 @@ import { tmpdir } from "node:os";
 import { execSync } from "node:child_process";
 import { join, resolve } from "node:path";
 import { fileURLToPath } from "node:url";
-import { computeSnapshot } from "../lib/snapshot";
-import expectedSnapshot from "../__snapshots__/core-package/trpc.snapshot.json";
+import { computeSnapshot } from "../lib/snapshot.js";
+import expectedSnapshot from "../__snapshots__/core-package/trpc.snapshot.json" with { type: "json" };
 
 // Repo root is 2 levels up from turbo/generators/__tests__
 const REPO_ROOT = resolve(fileURLToPath(import.meta.url), "..", "..", "..", "..");
diff --git a/turbo/generators/__tests__/core-package-ui.e2e.test.ts b/turbo/generators/__tests__/core-package-ui.e2e.test.ts
index e46c39b..ac85741 100644
--- a/turbo/generators/__tests__/core-package-ui.e2e.test.ts
+++ b/turbo/generators/__tests__/core-package-ui.e2e.test.ts
@@ -4,8 +4,8 @@ import { tmpdir } from "node:os";
 import { execSync } from "node:child_process";
 import { join, resolve } from "node:path";
 import { fileURLToPath } from "node:url";
-import { computeSnapshot } from "../lib/snapshot";
-import expectedSnapshot from "../__snapshots__/core-package/ui.snapshot.json";
+import { computeSnapshot } from "../lib/snapshot.js";
+import expectedSnapshot from "../__snapshots__/core-package/ui.snapshot.json" with { type: "json" };
 
 // Repo root is 2 levels up from turbo/generators/__tests__
 const REPO_ROOT = resolve(fileURLToPath(import.meta.url), "..", "..", "..", "..");
diff --git a/turbo/generators/config.test.ts b/turbo/generators/config.test.ts
index 025b026..69b1db9 100644
--- a/turbo/generators/config.test.ts
+++ b/turbo/generators/config.test.ts
@@ -1,6 +1,6 @@
 import { describe, it, expect } from "vitest";
 import type { PlopTypes } from "@turbo/gen";
-import generator from "./config";
+import generator from "./config.js";
 
 describe("core-package generator", () => {
   it("is registered with realtime and events in choices list", () => {
diff --git a/turbo/generators/lib/core-package-utils.test.ts b/turbo/generators/lib/core-package-utils.test.ts
index f21f53c..54f7f03 100644
--- a/turbo/generators/lib/core-package-utils.test.ts
+++ b/turbo/generators/lib/core-package-utils.test.ts
@@ -1,6 +1,5 @@
 import { describe, it, expect } from "vitest";
 import {
-  existsSync,
   mkdtempSync,
   mkdirSync,
   writeFileSync,
@@ -12,10 +11,9 @@ import {
   assertOptionalPackageNotPresent,
   addToTranspilePackages,
   splicePluginRulesAt,
-  splicePluginImportsAt,
   addBoundariesEntry,
   emitTemplateTree,
-} from "./core-package-utils";
+} from "./core-package-utils.js";
 
 describe("assertOptionalPackageNotPresent", () => {
   it("throws if packages/<name>/ exists in cwd", () => {
diff --git a/turbo/generators/lib/snapshot.test.ts b/turbo/generators/lib/snapshot.test.ts
index 19c3d34..5715472 100644
--- a/turbo/generators/lib/snapshot.test.ts
+++ b/turbo/generators/lib/snapshot.test.ts
@@ -2,7 +2,7 @@ import { describe, it, expect } from "vitest";
 import { mkdtempSync, mkdirSync, writeFileSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { computeSnapshot } from "./snapshot";
+import { computeSnapshot } from "./snapshot.js";
 
 describe("computeSnapshot", () => {
   it("returns sorted file paths + sha256 hashes", () => {
diff --git a/turbo/generators/package.json b/turbo/generators/package.json
index 4108f79..8b6d077 100644
--- a/turbo/generators/package.json
+++ b/turbo/generators/package.json
@@ -4,13 +4,17 @@
   "version": "0.0.0",
   "type": "module",
   "scripts": {
-    "test": "vitest run"
+    "lint": "eslint .",
+    "test": "vitest run",
+    "typecheck": "tsc --noEmit"
   },
   "dependencies": {
     "@turbo/gen": "^2.4.0"
   },
   "devDependencies": {
     "@repo/core-eslint": "workspace:*",
+    "@repo/core-typescript": "workspace:*",
+    "typescript": "^5.8.0",
     "vitest": "^3.1.0"
   }
 }