chore(tooling): add Knip configuration to detect unused files and dependencies

.agents/skills/databuddy-internal/SKILL.md

@@ -77,6 +77,7 @@ Keep additions **minimal**: one bullet, a new `rg` hint, or a routing note—eno
 - `packages/sdk`: published analytics SDK for React, Vue, and Node
 - `packages/tracker`: internal tracker script build and release package
 - `packages/encryption`, `packages/notifications`, `packages/cache`, `packages/redis`, `packages/services`, `packages/validation`, `packages/api-keys`: shared infra and domain packages
+- Knip is configured in root `knip.json` (run `bun run knip`); per-workspace test globs are required because the root `test:watch` (`bun test --watch ./apps`) script shadows the Bun plugin's per-workspace script parsing; `apps/cron` is ignored (standalone scripts, no package.json)
 
 Read [codebase-map.md](./references/codebase-map.md) when you need deeper routing guidance.
 

knip.json

@@ -0,0 +1,100 @@
+{
+  "$schema": "./node_modules/knip/schema.json",
+  "workspaces": {
+    ".": {
+      "entry": ["scripts/**/*.ts"],
+      "ignore": ["apps/cron/**"],
+      "ignoreBinaries": ["where", "which", "up"]
+    },
+    "apps/dashboard": {
+      "entry": ["**/*.test.{ts,tsx}"],
+      "ignoreDependencies": ["topojson-specification"]
+    },
+    "apps/docs": {
+      "entry": ["source.config.ts", "content/**/*.mdx", "**/*.test.{ts,tsx}"]
+    },
+    "apps/insights": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "apps/links": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "apps/slack": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "apps/uptime": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "apps/video": {
+      "entry": ["remotion.config.ts", "src/index.ts"],
+      "ignoreBinaries": ["out/intelligence-platform.mp4"]
+    },
+    "packages/ai": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/api-keys": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/db": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/devtools": {
+      "entry": ["src/{core,react,vue}/index.ts"]
+    },
+    "packages/email": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/encryption": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/env": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/migrate": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/notifications": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/nuxt": {
+      "entry": [
+        "src/module.ts",
+        "src/runtime/**/*.ts",
+        "playground/**/*.{ts,vue}"
+      ]
+    },
+    "packages/redis": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/rpc": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/sdk": {
+      "entry": [
+        "src/{core,node,react,vue}/index.ts",
+        "test-entry.ts",
+        "tests/**/*.test.{ts,tsx}",
+        "tests/**/*.types.ts"
+      ]
+    },
+    "packages/services": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/shared": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    },
+    "packages/tracker": {
+      "entry": [
+        "src/{errors,index,vitals}.ts",
+        "test-server.ts",
+        "tests/unit/**/*.test.ts"
+      ]
+    },
+    "packages/ui": {
+      "ignoreDependencies": ["tailwindcss", "tw-animate-css"]
+    },
+    "packages/validation": {
+      "entry": ["**/*.test.{ts,tsx}"]
+    }
+  }
+}

package.json

@@ -1,6 +1,5 @@
 {
   "name": "databuddy",
-  "module": "index.ts",
   "devDependencies": {
     "@babel/plugin-proposal-optional-chaining": "^7.21.0",
     "@babel/plugin-transform-react-jsx": "^7.28.6",
@@ -44,6 +43,7 @@
     "test:watch": "dotenv -- bun test --watch ./apps",
     "test:coverage": "dotenv -- bun test --coverage ./apps",
     "lint": "bunx ultracite check && bun run lint:policies",
+    "knip": "knip",
     "lint:policies": "bunx tsc --project scripts/tsconfig.json && bun test scripts/lint-policy.test.ts && bun scripts/lint-policy.ts",
     "format": "bunx ultracite fix",
     "check-types": "dotenv -- turbo run check-types",