feat: cache typecheck/lint/test/build tasks with turbo

document-cli is a single-package repo -- turbo.json declares only
leaf tasks (_typecheck, _lint, _test, _test:coverage, _test:smoke,
_test:workers, _build), none with a dependsOn, since there is no
other package to depend on. Each task declares its own real
inputs/outputs so turbo skips a re-run when nothing relevant has
changed. The bare script names now route through turbo run
_<name>; the underscore-prefixed names are the real leaf commands,
unchanged from what the bare names used to run directly, and stay
directly invocable to bypass the cache.

Author: Mearman

.gitignore

@@ -4,3 +4,4 @@ dist/
 .DS_Store
 coverage/
 .eslintcache
+.turbo/

package.json

@@ -49,15 +49,22 @@
     "node": ">=20"
   },
   "scripts": {
-    "build": "tsdown",
+    "build": "turbo run _build",
+    "_build": "tsdown",
     "prepublishOnly": "pnpm run lint && pnpm run typecheck && tsdown && publint && attw --pack",
-    "lint": "eslint . --fix --cache --max-warnings 0",
-    "typecheck": "tsc --noEmit",
-    "test": "vitest run --project unit",
+    "lint": "turbo run _lint",
+    "_lint": "eslint . --fix --cache --max-warnings 0",
+    "typecheck": "turbo run _typecheck",
+    "_typecheck": "tsc --noEmit",
+    "test": "turbo run _test",
+    "_test": "vitest run --project unit",
     "test:watch": "vitest --project unit",
-    "test:coverage": "vitest run --project unit --coverage",
-    "test:smoke": "tsdown && vitest run --project smoke",
-    "test:workers": "vitest run --config vitest.workers.config.ts",
+    "test:coverage": "turbo run _test:coverage",
+    "_test:coverage": "vitest run --project unit --coverage",
+    "test:smoke": "turbo run _test:smoke",
+    "_test:smoke": "tsdown && vitest run --project smoke",
+    "test:workers": "turbo run _test:workers",
+    "_test:workers": "vitest run --config vitest.workers.config.ts",
     "prepare": "husky",
     "release": "semantic-release"
   },
@@ -108,6 +115,7 @@
     "publint": "^0.3.22",
     "semantic-release": "^25.0.8",
     "tsdown": "^0.22.14",
+    "turbo": "^2.10.8",
     "typescript": "^6.0.3",
     "typescript-eslint": "^8.65.0",
     "vitest": "^4.1.10"

pnpm-lock.yaml

@@ -0,0 +1,34 @@
+{
+  "$schema": "https://turborepo.com/schema.json",
+  "globalDependencies": ["pnpm-lock.yaml"],
+  "tasks": {
+    "_typecheck": {
+      "inputs": ["$TURBO_DEFAULT$", "tsconfig.json"],
+      "outputs": []
+    },
+    "_lint": {
+      "inputs": ["$TURBO_DEFAULT$", "eslint.config.ts"],
+      "outputs": [".eslintcache"]
+    },
+    "_test": {
+      "inputs": ["src/**", "vitest.config.ts"],
+      "outputs": []
+    },
+    "_test:coverage": {
+      "inputs": ["src/**", "vitest.config.ts"],
+      "outputs": ["coverage/**"]
+    },
+    "_test:smoke": {
+      "inputs": ["src/**", "test/smoke.test.mjs", "vitest.config.ts", "tsdown.config.ts", "package.json"],
+      "outputs": ["dist/**"]
+    },
+    "_test:workers": {
+      "inputs": ["src/**", "test/workers/**", "vitest.workers.config.ts", "wrangler.jsonc"],
+      "outputs": []
+    },
+    "_build": {
+      "inputs": ["src/**", "tsdown.config.ts"],
+      "outputs": ["dist/**"]
+    }
+  }
+}