chore: use TypeScript project references (#5423)

package.json

@@ -18,7 +18,7 @@
     "test": "turbo --filter \"./packages/*\" test",
     "e2e:smoke": "turbo --filter \"./e2e/*\" e2e:smoke",
     "e2e:integration": "turbo --filter \"./e2e/*\" e2e:integration",
-    "typecheck": "turbo --filter \"./packages/*\" typecheck"
+    "typecheck": "tsc --build"
   },
   "devDependencies": {
     "@biomejs/biome": "2.2.4",

packages/better-auth/package.json

@@ -32,6 +32,7 @@
   "module": "./dist/index.js",
   "exports": {
     ".": {
+      "better-auth-dev-source": "./src/index.ts",
       "import": {
         "types": "./dist/index.d.ts",
         "default": "./dist/index.js"
@@ -42,6 +43,7 @@
       }
     },
     "./social-providers": {
+      "better-auth-dev-source": "./src/social-providers/index.ts",
       "import": {
         "types": "./dist/social-providers/index.d.ts",
         "default": "./dist/social-providers/index.js"
@@ -52,6 +54,7 @@
       }
     },
     "./client": {
+      "better-auth-dev-source": "./src/client/index.ts",
       "import": {
         "types": "./dist/client/index.d.ts",
         "default": "./dist/client/index.js"
@@ -62,6 +65,7 @@
       }
     },
     "./client/plugins": {
+      "better-auth-dev-source": "./src/client/plugins/index.ts",
       "import": {
         "types": "./dist/client/plugins/index.d.ts",
         "default": "./dist/client/plugins/index.js"
@@ -72,6 +76,7 @@
       }
     },
     "./types": {
+      "better-auth-dev-source": "./src/types/index.ts",
       "import": {
         "types": "./dist/types/index.d.ts",
         "default": "./dist/types/index.js"
@@ -82,6 +87,7 @@
       }
     },
     "./crypto": {
+      "better-auth-dev-source": "./src/crypto/index.ts",
       "import": {
         "types": "./dist/crypto/index.d.ts",
         "default": "./dist/crypto/index.js"
@@ -92,6 +98,7 @@
       }
     },
     "./cookies": {
+      "better-auth-dev-source": "./src/cookies/index.ts",
       "import": {
         "types": "./dist/cookies/index.d.ts",
         "default": "./dist/cookies/index.js"
@@ -102,6 +109,7 @@
       }
     },
     "./oauth2": {
+      "better-auth-dev-source": "./src/oauth2/index.ts",
       "import": {
         "types": "./dist/oauth2/index.d.ts",
         "default": "./dist/oauth2/index.js"
@@ -112,6 +120,7 @@
       }
     },
     "./react": {
+      "better-auth-dev-source": "./src/client/react/index.ts",
       "import": {
         "types": "./dist/client/react/index.d.ts",
         "default": "./dist/client/react/index.js"
@@ -122,6 +131,7 @@
       }
     },
     "./solid": {
+      "better-auth-dev-source": "./src/client/solid/index.ts",
       "import": {
         "types": "./dist/client/solid/index.d.ts",
         "default": "./dist/client/solid/index.js"
@@ -132,6 +142,7 @@
       }
     },
     "./lynx": {
+      "better-auth-dev-source": "./src/client/lynx/index.ts",
       "import": {
         "types": "./dist/client/lynx/index.d.ts",
         "default": "./dist/client/lynx/index.js"
@@ -142,6 +153,7 @@
       }
     },
     "./test": {
+      "better-auth-dev-source": "./src/test-utils/index.ts",
       "import": {
         "types": "./dist/test-utils/index.d.ts",
         "default": "./dist/test-utils/index.js"
@@ -152,6 +164,7 @@
       }
     },
     "./api": {
+      "better-auth-dev-source": "./src/api/index.ts",
       "import": {
         "types": "./dist/api/index.d.ts",
         "default": "./dist/api/index.js"
@@ -162,6 +175,7 @@
       }
     },
     "./db": {
+      "better-auth-dev-source": "./src/db/index.ts",
       "import": {
         "types": "./dist/db/index.d.ts",
         "default": "./dist/db/index.js"
@@ -172,6 +186,7 @@
       }
     },
     "./vue": {
+      "better-auth-dev-source": "./src/client/vue/index.ts",
       "import": {
         "types": "./dist/client/vue/index.d.ts",
         "default": "./dist/client/vue/index.js"
@@ -182,6 +197,7 @@
       }
     },
     "./plugins": {
+      "better-auth-dev-source": "./src/plugins/index.ts",
       "import": {
         "types": "./dist/plugins/index.d.ts",
         "default": "./dist/plugins/index.js"
@@ -192,6 +208,7 @@
       }
     },
     "./svelte-kit": {
+      "better-auth-dev-source": "./src/integrations/svelte-kit.ts",
       "import": {
         "types": "./dist/integrations/svelte-kit.d.ts",
         "default": "./dist/integrations/svelte-kit.js"
@@ -202,6 +219,7 @@
       }
     },
     "./solid-start": {
+      "better-auth-dev-source": "./src/integrations/solid-start.ts",
       "import": {
         "types": "./dist/integrations/solid-start.d.ts",
         "default": "./dist/integrations/solid-start.js"
@@ -212,6 +230,7 @@
       }
     },
     "./svelte": {
+      "better-auth-dev-source": "./src/client/svelte/index.ts",
       "import": {
         "types": "./dist/client/svelte/index.d.ts",
         "default": "./dist/client/svelte/index.js"
@@ -222,6 +241,7 @@
       }
     },
     "./next-js": {
+      "better-auth-dev-source": "./src/integrations/next-js.ts",
       "import": {
         "types": "./dist/integrations/next-js.d.ts",
         "default": "./dist/integrations/next-js.js"
@@ -232,6 +252,7 @@
       }
     },
     "./react-start": {
+      "better-auth-dev-source": "./src/integrations/react-start.ts",
       "import": {
         "types": "./dist/integrations/react-start.d.ts",
         "default": "./dist/integrations/react-start.js"
@@ -242,6 +263,7 @@
       }
     },
     "./node": {
+      "better-auth-dev-source": "./src/integrations/node.ts",
       "import": {
         "types": "./dist/integrations/node.d.ts",
         "default": "./dist/integrations/node.js"
@@ -252,6 +274,7 @@
       }
     },
     "./adapters/prisma": {
+      "better-auth-dev-source": "./src/adapters/prisma-adapter/index.ts",
       "import": {
         "types": "./dist/adapters/prisma-adapter/index.d.ts",
         "default": "./dist/adapters/prisma-adapter/index.js"
@@ -262,6 +285,7 @@
       }
     },
     "./adapters/drizzle": {
+      "better-auth-dev-source": "./src/adapters/drizzle-adapter/index.ts",
       "import": {
         "types": "./dist/adapters/drizzle-adapter/index.d.ts",
         "default": "./dist/adapters/drizzle-adapter/index.js"
@@ -272,6 +296,7 @@
       }
     },
     "./adapters/mongodb": {
+      "better-auth-dev-source": "./src/adapters/mongodb-adapter/index.ts",
       "import": {
         "types": "./dist/adapters/mongodb-adapter/index.d.ts",
         "default": "./dist/adapters/mongodb-adapter/index.js"
@@ -282,6 +307,7 @@
       }
     },
     "./adapters/memory": {
+      "better-auth-dev-source": "./src/adapters/memory-adapter/index.ts",
       "import": {
         "types": "./dist/adapters/memory-adapter/index.d.ts",
         "default": "./dist/adapters/memory-adapter/index.js"
@@ -292,6 +318,7 @@
       }
     },
     "./adapters/test": {
+      "better-auth-dev-source": "./src/adapters/test.ts",
       "import": {
         "types": "./dist/adapters/test.d.ts",
         "default": "./dist/adapters/test.js"
@@ -302,6 +329,7 @@
       }
     },
     "./adapters": {
+      "better-auth-dev-source": "./src/adapters/index.ts",
       "import": {
         "types": "./dist/adapters/index.d.ts",
         "default": "./dist/adapters/index.js"
@@ -312,6 +340,7 @@
       }
     },
     "./plugins/access": {
+      "better-auth-dev-source": "./src/plugins/access/index.ts",
       "import": {
         "types": "./dist/plugins/access/index.d.ts",
         "default": "./dist/plugins/access/index.js"
@@ -322,6 +351,7 @@
       }
     },
     "./plugins/admin": {
+      "better-auth-dev-source": "./src/plugins/admin/index.ts",
       "import": {
         "types": "./dist/plugins/admin/index.d.ts",
         "default": "./dist/plugins/admin/index.js"
@@ -332,6 +362,7 @@
       }
     },
     "./plugins/admin/access": {
+      "better-auth-dev-source": "./src/plugins/admin/access/index.ts",
       "import": {
         "types": "./dist/plugins/admin/access/index.d.ts",
         "default": "./dist/plugins/admin/access/index.js"
@@ -342,6 +373,7 @@
       }
     },
     "./plugins/anonymous": {
+      "better-auth-dev-source": "./src/plugins/anonymous/index.ts",
       "import": {
         "types": "./dist/plugins/anonymous/index.d.ts",
         "default": "./dist/plugins/anonymous/index.js"
@@ -352,6 +384,7 @@
       }
     },
     "./plugins/bearer": {
+      "better-auth-dev-source": "./src/plugins/bearer/index.ts",
       "import": {
         "types": "./dist/plugins/bearer/index.d.ts",
         "default": "./dist/plugins/bearer/index.js"
@@ -362,6 +395,7 @@
       }
     },
     "./plugins/custom-session": {
+      "better-auth-dev-source": "./src/plugins/custom-session/index.ts",
       "import": {
         "types": "./dist/plugins/custom-session/index.d.ts",
         "default": "./dist/plugins/custom-session/index.js"
@@ -372,6 +406,7 @@
       }
     },
     "./plugins/email-otp": {
+      "better-auth-dev-source": "./src/plugins/email-otp/index.ts",
       "import": {
         "types": "./dist/plugins/email-otp/index.d.ts",
         "default": "./dist/plugins/email-otp/index.js"
@@ -382,6 +417,7 @@
       }
     },
     "./plugins/generic-oauth": {
+      "better-auth-dev-source": "./src/plugins/generic-oauth/index.ts",
       "import": {
         "types": "./dist/plugins/generic-oauth/index.d.ts",
         "default": "./dist/plugins/generic-oauth/index.js"
@@ -392,6 +428,7 @@
       }
     },
     "./plugins/jwt": {
+      "better-auth-dev-source": "./src/plugins/jwt/index.ts",
       "import": {
         "types": "./dist/plugins/jwt/index.d.ts",
         "default": "./dist/plugins/jwt/index.js"
@@ -402,6 +439,7 @@
       }
     },
     "./plugins/haveibeenpwned": {
+      "better-auth-dev-source": "./src/plugins/haveibeenpwned/index.ts",
       "import": {
         "types": "./dist/plugins/haveibeenpwned/index.d.ts",
         "default": "./dist/plugins/haveibeenpwned/index.js"
@@ -412,6 +450,7 @@
       }
     },
     "./plugins/oidc-provider": {
+      "better-auth-dev-source": "./src/plugins/oidc-provider/index.ts",
       "import": {
         "types": "./dist/plugins/oidc-provider/index.d.ts",
         "default": "./dist/plugins/oidc-provider/index.js"
@@ -422,6 +461,7 @@
       }
     },
     "./plugins/magic-link": {
+      "better-auth-dev-source": "./src/plugins/magic-link/index.ts",
       "import": {
         "types": "./dist/plugins/magic-link/index.d.ts",
         "default": "./dist/plugins/magic-link/index.js"
@@ -432,6 +472,7 @@
       }
     },
     "./plugins/multi-session": {
+      "better-auth-dev-source": "./src/plugins/multi-session/index.ts",
       "import": {
         "types": "./dist/plugins/multi-session/index.d.ts",
         "default": "./dist/plugins/multi-session/index.js"
@@ -442,6 +483,7 @@
       }
     },
     "./plugins/oauth-proxy": {
+      "better-auth-dev-source": "./src/plugins/oauth-proxy/index.ts",
       "import": {
         "types": "./dist/plugins/oauth-proxy/index.d.ts",
         "default": "./dist/plugins/oauth-proxy/index.js"
@@ -452,6 +494,7 @@
       }
     },
     "./plugins/organization": {
+      "better-auth-dev-source": "./src/plugins/organization/index.ts",
       "import": {
         "types": "./dist/plugins/organization/index.d.ts",
         "default": "./dist/plugins/organization/index.js"
@@ -462,6 +505,7 @@
       }
     },
     "./plugins/organization/access": {
+      "better-auth-dev-source": "./src/plugins/organization/access/index.ts",
       "import": {
         "types": "./dist/plugins/organization/access/index.d.ts",
         "default": "./dist/plugins/organization/access/index.js"
@@ -472,6 +516,7 @@
       }
     },
     "./plugins/one-time-token": {
+      "better-auth-dev-source": "./src/plugins/one-time-token/index.ts",
       "import": {
         "types": "./dist/plugins/one-time-token/index.d.ts",
         "default": "./dist/plugins/one-time-token/index.js"
@@ -482,6 +527,7 @@
       }
     },
     "./plugins/passkey": {
+      "better-auth-dev-source": "./src/plugins/passkey/index.ts",
       "import": {
         "types": "./dist/plugins/passkey/index.d.ts",
         "default": "./dist/plugins/passkey/index.js"
@@ -492,6 +538,7 @@
       }
     },
     "./plugins/phone-number": {
+      "better-auth-dev-source": "./src/plugins/phone-number/index.ts",
       "import": {
         "types": "./dist/plugins/phone-number/index.d.ts",
         "default": "./dist/plugins/phone-number/index.js"
@@ -502,6 +549,7 @@
       }
     },
     "./plugins/two-factor": {
+      "better-auth-dev-source": "./src/plugins/two-factor/index.ts",
       "import": {
         "types": "./dist/plugins/two-factor/index.d.ts",
         "default": "./dist/plugins/two-factor/index.js"
@@ -512,6 +560,7 @@
       }
     },
     "./plugins/username": {
+      "better-auth-dev-source": "./src/plugins/username/index.ts",
       "import": {
         "types": "./dist/plugins/username/index.d.ts",
         "default": "./dist/plugins/username/index.js"
@@ -522,6 +571,7 @@
       }
     },
     "./plugins/siwe": {
+      "better-auth-dev-source": "./src/plugins/siwe/index.ts",
       "import": {
         "types": "./dist/plugins/siwe/index.d.ts",
         "default": "./dist/plugins/siwe/index.js"
@@ -532,6 +582,7 @@
       }
     },
     "./plugins/device-authorization": {
+      "better-auth-dev-source": "./src/plugins/device-authorization/index.ts",
       "import": {
         "types": "./dist/plugins/device-authorization/index.d.ts",
         "default": "./dist/plugins/device-authorization/index.js"

packages/better-auth/tsconfig.json

@@ -1,10 +1,15 @@
 {
-  "extends": "../../tsconfig.json",
+  "extends": "../../tsconfig.base.json",
   "compilerOptions": {
-    "rootDir": "./src",
-    "outDir": "./dist",
     "lib": ["esnext", "dom", "dom.iterable"],
     "types": ["node", "bun"]
   },
-  "include": ["src"]
+  "references": [
+    {
+      "path": "../core/tsconfig.json"
+    },
+    {
+      "path": "../telemetry/tsconfig.json"
+    }
+  ]
 }

packages/better-auth/tsdown.config.ts

@@ -1,7 +1,7 @@
 import { defineConfig } from "tsdown";
 
 export default defineConfig({
-	dts: true,
+	dts: { build: true, incremental: true },
 	format: ["esm", "cjs"],
 	entry: [
 		"./src/index.ts",

packages/cli/tsconfig.json

@@ -1,9 +1,11 @@
 {
-  "extends": "../../tsconfig.json",
+  "extends": "../../tsconfig.base.json",
   "compilerOptions": {
-    "rootDir": "./src",
-    "outDir": "./dist",
     "lib": ["esnext", "dom", "dom.iterable"]
   },
-  "include": ["src"]
+  "references": [
+    {
+      "path": "../better-auth/tsconfig.json"
+    }
+  ]
 }

packages/cli/tsconfig.test.json

@@ -1,15 +0,0 @@
-{
-  "extends": "../../tsconfig.json",
-  "compilerOptions": {
-    "rootDir": ".",
-    "outDir": "./node_modules/.cache/test",
-    "tsBuildInfoFile": "tsconfig.test.tsbuildinfo",
-    "lib": ["esnext", "dom", "dom.iterable"]
-  },
-  "references": [
-    {
-      "path": "../better-auth/tsconfig.json"
-    }
-  ],
-  "include": ["test", "src"]
-}

packages/core/package.json

@@ -7,6 +7,7 @@
   "module": "./dist/index.js",
   "exports": {
     ".": {
+      "better-auth-dev-source": "./src/index.ts",
       "import": {
         "types": "./dist/index.d.ts",
         "default": "./dist/index.js"
@@ -17,6 +18,7 @@
       }
     },
     "./api": {
+      "better-auth-dev-source": "./src/api/index.ts",
       "import": {
         "types": "./dist/api/index.d.ts",
         "default": "./dist/api/index.js"
@@ -27,6 +29,7 @@
       }
     },
     "./async_hooks": {
+      "better-auth-dev-source": "./src/async_hooks/index.ts",
       "import": {
         "types": "./dist/async_hooks/index.d.ts",
         "default": "./dist/async_hooks/index.js"
@@ -37,6 +40,7 @@
       }
     },
     "./context": {
+      "better-auth-dev-source": "./src/context/index.ts",
       "import": {
         "types": "./dist/context/index.d.ts",
         "default": "./dist/context/index.js"
@@ -47,6 +51,7 @@
       }
     },
     "./env": {
+      "better-auth-dev-source": "./src/env/index.ts",
       "import": {
         "types": "./dist/env/index.d.ts",
         "default": "./dist/env/index.js"
@@ -57,6 +62,7 @@
       }
     },
     "./error": {
+      "better-auth-dev-source": "./src/error/index.ts",
       "import": {
         "types": "./dist/error/index.d.ts",
         "default": "./dist/error/index.js"
@@ -67,6 +73,7 @@
       }
     },
     "./utils": {
+      "better-auth-dev-source": "./src/utils/index.ts",
       "import": {
         "types": "./dist/utils/index.d.ts",
         "default": "./dist/utils/index.js"
@@ -77,6 +84,7 @@
       }
     },
     "./social-providers": {
+      "better-auth-dev-source": "./src/social-providers/index.ts",
       "import": {
         "types": "./dist/social-providers/index.d.ts",
         "default": "./dist/social-providers/index.js"
@@ -87,6 +95,7 @@
       }
     },
     "./db": {
+      "better-auth-dev-source": "./src/db/index.ts",
       "import": {
         "types": "./dist/db/index.d.ts",
         "default": "./dist/db/index.js"
@@ -97,6 +106,7 @@
       }
     },
     "./db/adapter": {
+      "better-auth-dev-source": "./src/db/adapter/index.ts",
       "import": {
         "types": "./dist/db/adapter/index.d.ts",
         "default": "./dist/db/adapter/index.js"
@@ -107,6 +117,7 @@
       }
     },
     "./oauth2": {
+      "better-auth-dev-source": "./src/oauth2/index.ts",
       "import": {
         "types": "./dist/oauth2/index.d.ts",
         "default": "./dist/oauth2/index.js"

packages/core/tsconfig.json

@@ -1,10 +1,7 @@
 {
-  "extends": "../../tsconfig.json",
+  "extends": "../../tsconfig.base.json",
   "compilerOptions": {
-    "rootDir": "./src",
-    "outDir": "./dist",
     "lib": ["esnext", "dom", "dom.iterable"],
     "types": ["node"]
-  },
-  "include": ["src"]
+  }
 }

packages/core/tsdown.config.ts

@@ -1,7 +1,7 @@
 import { defineConfig } from "tsdown";
 
 export default defineConfig({
-	dts: true,
+	dts: { build: true, incremental: true },
 	format: ["esm", "cjs"],
 	entry: [
 		"./src/index.ts",

packages/expo/package.json

@@ -19,11 +19,13 @@
   },
   "exports": {
     ".": {
+      "better-auth-dev-source": "./src/index.ts",
       "types": "./dist/index.d.ts",
       "import": "./dist/index.js",
       "require": "./dist/index.cjs"
     },
     "./client": {
+      "better-auth-dev-source": "./src/client.ts",
       "types": "./dist/client.d.ts",
       "import": "./dist/client.js",
       "require": "./dist/client.cjs"

packages/expo/tsconfig.json

@@ -1,9 +1,11 @@
 {
-  "extends": "../../tsconfig.json",
+  "extends": "../../tsconfig.base.json",
   "compilerOptions": {
-    "rootDir": "./src",
-    "outDir": "./dist",
     "lib": ["esnext", "dom", "dom.iterable"]
   },
-  "include": ["src"]
+  "references": [
+    {
+      "path": "../better-auth/tsconfig.json"
+    }
+  ]
 }

packages/expo/tsdown.config.ts

@@ -1,7 +1,7 @@
 import { defineConfig } from "tsdown";
 
 export default defineConfig({
-	dts: true,
+	dts: { build: true, incremental: true },
 	format: ["esm", "cjs"],
 	entry: ["./src/index.ts", "./src/client.ts"],
 	external: [

packages/sso/package.json

@@ -30,11 +30,13 @@
   },
   "exports": {
     ".": {
+      "better-auth-dev-source": "./src/index.ts",
       "types": "./dist/index.d.ts",
       "import": "./dist/index.js",
       "require": "./dist/index.cjs"
     },
     "./client": {
+      "better-auth-dev-source": "./src/client.ts",
       "types": "./dist/client.d.ts",
       "import": "./dist/client.js",
       "require": "./dist/client.cjs"

packages/sso/tsconfig.json

@@ -1,9 +1,11 @@
 {
-  "extends": "../../tsconfig.json",
+  "extends": "../../tsconfig.base.json",
   "compilerOptions": {
-    "rootDir": "./src",
-    "outDir": "./dist",
     "lib": ["esnext", "dom", "dom.iterable"]
   },
-  "include": ["src"]
+  "references": [
+    {
+      "path": "../better-auth/tsconfig.json"
+    }
+  ]
 }

packages/sso/tsdown.config.ts

@@ -1,7 +1,7 @@
 import { defineConfig } from "tsdown";
 
 export default defineConfig({
-	dts: true,
+	dts: { build: true, incremental: true },
 	format: ["esm", "cjs"],
 	entry: ["./src/index.ts", "./src/client.ts"],
 	external: ["better-auth", "better-call", "@better-fetch/fetch", "stripe"],

packages/stripe/package.json

@@ -23,11 +23,13 @@
   },
   "exports": {
     ".": {
+      "better-auth-dev-source": "./src/index.ts",
       "types": "./dist/index.d.ts",
       "import": "./dist/index.js",
       "require": "./dist/index.cjs"
     },
     "./client": {
+      "better-auth-dev-source": "./src/client.ts",
       "types": "./dist/client.d.ts",
       "import": "./dist/client.js",
       "require": "./dist/client.cjs"

packages/stripe/tsconfig.json

@@ -1,9 +1,14 @@
 {
-  "extends": "../../tsconfig.json",
+  "extends": "../../tsconfig.base.json",
   "compilerOptions": {
-    "rootDir": "./src",
-    "outDir": "./dist",
     "lib": ["esnext", "dom", "dom.iterable"]
   },
-  "include": ["src"]
+  "references": [
+    {
+      "path": "../better-auth/tsconfig.json"
+    },
+    {
+      "path": "../core/tsconfig.json"
+    }
+  ]
 }

packages/stripe/tsdown.config.ts

@@ -1,7 +1,7 @@
 import { defineConfig } from "tsdown";
 
 export default defineConfig({
-	dts: true,
+	dts: { build: true, incremental: true },
 	format: ["esm", "cjs"],
 	entry: ["./src/index.ts", "./src/client.ts"],
 	external: ["better-auth", "better-call", "@better-fetch/fetch", "stripe"],

packages/telemetry/package.json

@@ -7,6 +7,7 @@
   "module": "./dist/index.js",
   "exports": {
     ".": {
+      "better-auth-dev-source": "./src/index.ts",
       "import": {
         "types": "./dist/index.d.ts",
         "default": "./dist/index.js"

packages/telemetry/tsconfig.json

@@ -1,9 +1,8 @@
 {
-  "extends": "../../tsconfig.json",
-  "compilerOptions": {
-    "outDir": "dist",
-    "rootDir": "src"
-  },
-  "include": ["src/**/*"],
-  "exclude": ["node_modules", "dist"]
+  "extends": "../../tsconfig.base.json",
+  "references": [
+    {
+      "path": "../core/tsconfig.json"
+    }
+  ]
 }

packages/telemetry/tsdown.config.ts

@@ -1,7 +1,7 @@
 import { defineConfig } from "tsdown";
 
 export default defineConfig({
-	dts: true,
+	dts: { build: true, incremental: true },
 	format: ["esm", "cjs"],
 	entry: ["./src/index.ts"],
 });

tsconfig.base.json

@@ -0,0 +1,30 @@
+{
+  "compilerOptions": {
+    "strict": true,
+    "target": "esnext",
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "downlevelIteration": true,
+    "baseUrl": ".",
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "verbatimModuleSyntax": true,
+    "noUncheckedIndexedAccess": true,
+    "exactOptionalPropertyTypes": false,
+    "incremental": true,
+    "noErrorTruncation": true,
+    "composite": true,
+    "declaration": true,
+    "emitDeclarationOnly": true,
+    "types": ["node", "bun"],
+    // Put the .d.ts files output and cache file (tsbuildinfo) in a directory
+    // that will be ignored by other tools.
+    "outDir": "${configDir}/node_modules/.cache/ts/out",
+    "tsBuildInfoFile": "${configDir}/node_modules/.cache/ts/tsbuildinfo",
+    // A custom condition that can be set to the "exports" filed in package.json
+    // and it should directs to the source .ts files. This enables the
+    // jump-to-definition feature in IDEs to function properly.
+    "customConditions": ["better-auth-dev-source"]
+  },
+  "exclude": ["**/dist/**", "**/node_modules/**"]
+}

tsconfig.json

@@ -1,19 +1,31 @@
 {
-  "compilerOptions": {
-    "strict": true,
-    "target": "esnext",
-    "module": "esnext",
-    "moduleResolution": "bundler",
-    "downlevelIteration": true,
-    "baseUrl": ".",
-    "esModuleInterop": true,
-    "skipLibCheck": true,
-    "verbatimModuleSyntax": true,
-    "noUncheckedIndexedAccess": true,
-    "exactOptionalPropertyTypes": false,
-    "incremental": true,
-    "noErrorTruncation": true,
-    "types": ["node", "bun"]
-  },
-  "exclude": ["**/dist/**", "**/node_modules/**"]
+  "extends": "./tsconfig.base.json",
+  "include": [
+    // Only include files that are in the root directory. All other files are included by the references.
+    "./*.ts",
+    "./*.js"
+  ],
+  "references": [
+    {
+      "path": "./packages/better-auth/tsconfig.json"
+    },
+    {
+      "path": "./packages/cli/tsconfig.json"
+    },
+    {
+      "path": "./packages/core/tsconfig.json"
+    },
+    {
+      "path": "./packages/expo/tsconfig.json"
+    },
+    {
+      "path": "./packages/sso/tsconfig.json"
+    },
+    {
+      "path": "./packages/stripe/tsconfig.json"
+    },
+    {
+      "path": "./packages/telemetry/tsconfig.json"
+    }
+  ]
 }