diff --git a/package.json b/package.json
index 226b708a3..16468a5e9 100644
--- a/package.json
+++ b/package.json
@@ -18,19 +18,19 @@
     "docs": "pnpm --filter @browserbasehq/stagehand-docs run dev",
     "evals": "tsx scripts/run-evals.ts",
     "evals:legacy": "tsx scripts/run-evals.ts",
-    "e2e": "pnpm run build && cd evals/deterministic && playwright test --config=e2e.playwright.config.ts",
-    "e2e:bb": "pnpm run build && cd evals/deterministic && playwright test --config=bb.playwright.config.ts",
-    "e2e:local": "pnpm run build && cd evals/deterministic && playwright test --config=local.playwright.config.ts",
+    "e2e": "pnpm run build && node scripts/build-e2e.mjs && node scripts/run-playwright.mjs --config=dist/playwright/evals/deterministic/e2e.playwright.config.js",
+    "e2e:bb": "pnpm run build && node scripts/build-e2e.mjs && node scripts/run-playwright.mjs --config=dist/playwright/evals/deterministic/bb.playwright.config.js",
+    "e2e:local": "pnpm run build && node scripts/build-e2e.mjs && node scripts/run-playwright.mjs --config=dist/playwright/evals/deterministic/local.playwright.config.js",
     "build-dom-scripts": "tsx lib/dom/genDomScripts.ts",
-    "build-types": "tsc --emitDeclarationOnly --outDir dist",
-    "build-js": "tsup lib/index.ts --dts",
-    "build:cli": "tsup evals/cli.ts --outDir dist/evals --format cjs && cp evals/evals.config.json dist/evals/ && chmod +x dist/evals/cli.js && npm link",
-    "build": "pnpm run lint && pnpm run gen-version && pnpm run build-dom-scripts && pnpm run build-js && pnpm run build-types",
+    "build-types": "tsc --project tsconfig.build.json",
+    "build:cli": "node scripts/build-cli.mjs",
+    "build": "pnpm run lint && pnpm run gen-version && pnpm run build-dom-scripts && pnpm run build:lib && pnpm run build-types",
     "gen-version": "tsx scripts/gen-version.ts",
     "prepare": "pnpm run build",
     "lint": "pnpm run prettier:fix && pnpm run eslint",
     "release": "pnpm run build && changeset publish",
-    "release-canary": "pnpm run build && changeset version --snapshot && changeset publish --tag alpha"
+    "release-canary": "pnpm run build && changeset version --snapshot && changeset publish --tag alpha",
+    "build:lib": "node scripts/build-lib.mjs"
   },
   "files": [
     "dist/**"
@@ -63,7 +63,6 @@
     "multer": "^1.4.5-lts.1",
     "prettier": "^3.2.5",
     "string-comparison": "^1.3.0",
-    "tsup": "^8.2.1",
     "tsx": "^4.10.5",
     "typescript": "^5.2.2",
     "typescript-eslint": "^8.17.0"
@@ -86,7 +85,8 @@
     "pino-pretty": "^13.0.0",
     "playwright": "^1.52.0",
     "ws": "^8.18.0",
-    "zod-to-json-schema": "^3.23.5"
+    "zod-to-json-schema": "^3.23.5",
+    "playwright-core": "^1.52.0"
   },
   "optionalDependencies": {
     "@ai-sdk/anthropic": "^1.2.6",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index cbd994598..01c915bf7 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -46,7 +46,14 @@ importers:
         version: 13.1.1
       playwright:
         specifier: ^1.52.0
+
+        version: 1.52.0
+      playwright-core:
+        specifier: ^1.52.0
+        version: 1.52.0
+
         version: 1.55.0
+
       ws:
         specifier: ^8.18.0
         version: 8.18.3
@@ -166,9 +173,12 @@ importers:
       string-comparison:
         specifier: ^1.3.0
         version: 1.3.0
+
+
       tsup:
         specifier: ^8.2.1
         version: 8.5.0(jiti@1.21.7)(postcss@8.5.6)(tsx@4.20.5)(typescript@5.9.2)(yaml@2.8.1)
+
       tsx:
         specifier: ^4.10.5
         version: 4.20.5
@@ -1411,6 +1421,10 @@ packages:
     engines: {node: '>=18'}
     hasBin: true
 
+
+  '@shikijs/core@3.11.0':
+    resolution: {integrity: sha512-oJwU+DxGqp6lUZpvtQgVOXNZcVsirN76tihOLBmwILkKuRuwHteApP8oTXmL4tF5vS5FbOY0+8seXmiCoslk4g==}
+
   '@radix-ui/primitive@1.1.3':
     resolution: {integrity: sha512-JTF99U/6XIjCBo0wqkU5sK10glYe27MRRsfwoiq5zzOEZLHU3A3KCMa5X/azekYRCJ0HlwI0crAXS/5dEHTzDg==}
 
@@ -1745,6 +1759,7 @@ packages:
   '@shikijs/engine-javascript@3.13.0':
     resolution: {integrity: sha512-Ty7xv32XCp8u0eQt8rItpMs6rU9Ki6LJ1dQOW3V/56PKDcpvfHPnYFbsx5FFUP2Yim34m/UkazidamMNVR4vKg==}
 
+
   '@shikijs/engine-oniguruma@3.13.0':
     resolution: {integrity: sha512-O42rBGr4UDSlhT2ZFMxqM7QzIU+IcpoTMzb3W7AlziI1ZF7R8eS2M0yt5Ry35nnnTX/LTLXFPUjRFCIW+Operg==}
 
@@ -2429,12 +2444,6 @@ packages:
   buffer@5.7.1:
     resolution: {integrity: sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==}
 
-  bundle-require@5.1.0:
-    resolution: {integrity: sha512-3WrrOuZiyaaZPWiEt4G3+IffISVC9HYlWueJEBWED4ZH4aIAC2PnkdnuRrR94M+w6yGWn4AglWtJtBI8YqvgoA==}
-    engines: {node: ^12.20.0 || ^14.13.1 || >=16.0.0}
-    peerDependencies:
-      esbuild: '>=0.18'
-
   busboy@1.6.0:
     resolution: {integrity: sha512-8SFQbg/0hQ9xy3UNTB0YEnsNBbWfhf7RtnzpL7TkBiTBRfrQ9Fxcnz7VJsleJpyp6rVLvXiuORqjlHi5q+PYuA==}
     engines: {node: '>=10.16.0'}
@@ -2443,10 +2452,6 @@ packages:
     resolution: {integrity: sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg==}
     engines: {node: '>= 0.8'}
 
-  cac@6.7.14:
-    resolution: {integrity: sha512-b6Ilus+c3RrdDk+JhLKUAQfzzgLEPy6wcXqS7f/xe1EETvsDP6GORG7SFuOs6cID5YkqchW/LXZbX5bc8j7ZcQ==}
-    engines: {node: '>=8'}
-
   cacheable-lookup@7.0.0:
     resolution: {integrity: sha512-+qJyx4xiKra8mZrcwhjMRMUhD5NR1R8esPkzIYxX96JiecFoxAXFuz/GpR3+ev4PE1WamHip78wV0vcmPQtp8w==}
     engines: {node: '>=14.16'}
@@ -2522,10 +2527,6 @@ packages:
     resolution: {integrity: sha512-7VT13fmjotKpGipCW9JEQAusEPE+Ei8nl6/g4FBAmIm0GOOLMua9NDDo/DWp0ZAxCr3cPq5ZpBqmPAQgDda2Pw==}
     engines: {node: '>= 8.10.0'}
 
-  chokidar@4.0.3:
-    resolution: {integrity: sha512-Qgzu8kfBvo+cA4962jnP1KkS6Dop5NS6g7R5LFYJr4b8Ub94PPQXUksCw9PvXoeXPRRddRNC5C1JQUR2SMGtnA==}
-    engines: {node: '>= 14.16.0'}
-
   chownr@2.0.0:
     resolution: {integrity: sha512-bIomtDF5KGpdogkLd9VspvFzk9KfpyyGlS8YFVZl7TGPBHL5snIOnxeshwVgPteQ9b4Eydl+pVbIyE1DcvCWgQ==}
     engines: {node: '>=10'}
@@ -2635,6 +2636,10 @@ packages:
     resolution: {integrity: sha512-27HBghJxjiZtIk3Ycvn/4kbJk/1uZuJFfuPEns6LaEvpvG1f0hTea8lilrouyo9mVc2GWdcEZ8OLoGmSADlrCw==}
     engines: {'0': node >= 0.8}
 
+
+  console-table-printer@2.12.1:
+    resolution: {integrity: sha512-wKGOQRRvdnd89pCeH96e2Fn4wkbenSP6LMHfjfyNLMbGuHEFbMqQNuxXqd0oXG9caIOQ1FTvc5Uijp9/4jujnQ==}
+
   confbox@0.1.8:
     resolution: {integrity: sha512-RMtmw0iFkeR4YV+fUOSucriAQNb9g8zFR52MWCtl+cCZOFRNL6zeB395vPzFhEjjn4fMxXudmELnl/KF/WrK6w==}
 
@@ -2645,6 +2650,7 @@ packages:
   console-table-printer@2.14.6:
     resolution: {integrity: sha512-MCBl5HNVaFuuHW6FGbL/4fB7N/ormCy+tQ+sxTrF6QtSbSNETvPuOVbkJBhzDgYhvjWGrTma4eYJa37ZuoQsPw==}
 
+
   content-disposition@0.5.4:
     resolution: {integrity: sha512-FveZTNuGw04cxlAiWbzi6zTAL/lhehaWbTtgluJh4/E95DqMwTmha3KZN1aAWA8cFIhHzMZUvLevkw5Rqk+tSQ==}
     engines: {node: '>= 0.6'}
@@ -3207,6 +3213,8 @@ packages:
   fd-slicer@1.1.0:
     resolution: {integrity: sha512-cE1qsB/VwyQozZ+q1dGxR8LBYNZeofhEdUNGSMbQD3Gw2lAzX9Zb3uIU6Ebc/Fmyjo9AWWfnn0AUCHqtevs/8g==}
 
+
+
   fdir@6.5.0:
     resolution: {integrity: sha512-tIbYtZbucOs0BRGqPJkshJUYdL+SDH7dVM8gjy+ERp3WAUjLEFJE+02kanyHtwjWOnwrKYBiwAmM0p4kLJAnXg==}
     engines: {node: '>=12.0.0'}
@@ -3216,6 +3224,7 @@ packages:
       picomatch:
         optional: true
 
+
   fetch-cookie@3.1.0:
     resolution: {integrity: sha512-s/XhhreJpqH0ftkGVcQt8JE9bqk+zRn4jF5mPJXWZeQMCI5odV9K+wEWYbnzFPHgQZlvPSMjS4n4yawWE8RINw==}
 
@@ -4006,10 +4015,6 @@ packages:
   lines-and-columns@1.2.4:
     resolution: {integrity: sha512-7ylylesZQ/PV29jhEDl3Ufjo6ZX7gCqJr5F7PKrqc93v7fzSymt1BpwEU8nAUXs8qzzvqhbjhK5QZg6Mt/HkBg==}
 
-  load-tsconfig@0.2.5:
-    resolution: {integrity: sha512-IXO6OCs9yg8tMKzfPZ1YmheJbZCiEsnBdcB03l0OcfK9prKnJb96siuHCr5Fl37/yo9DnKU+TLpxzTUspw9shg==}
-    engines: {node: ^12.20.0 || ^14.13.1 || >=16.0.0}
-
   locate-character@3.0.0:
     resolution: {integrity: sha512-SW13ws7BjaeJ6p7Q6CO2nchbYEc3X3J6WrmTTDto7yMPqVSZTUyY5Tjbid+Ab8gLnATtygYtiDIJGQRRn2ZOiA==}
 
@@ -4024,9 +4029,6 @@ packages:
   lodash.merge@4.6.2:
     resolution: {integrity: sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==}
 
-  lodash.sortby@4.7.0:
-    resolution: {integrity: sha512-HDWXG8isMntAyRF5vZ7xKuEvOhT4AhlRt/3czTSjvGUxjYCBVRQY48ViDHyfYz9VIoBkW4TMGQNapx+l3RUwdA==}
-
   lodash.startcase@4.4.0:
     resolution: {integrity: sha512-+WKqsK294HMSc2jEbNgpHpd0JfIBhp7rEV4aqXWqFr6AlXov+SlcgB1Fv01y2kGe3Gc8nMW7VA0SrGuSkRfIEg==}
 
@@ -4701,10 +4703,12 @@ packages:
     resolution: {integrity: sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==}
     engines: {node: '>=8.6'}
 
+
   picomatch@4.0.3:
     resolution: {integrity: sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==}
     engines: {node: '>=12'}
 
+
   pify@2.3.0:
     resolution: {integrity: sha512-udgsAY+fTnvv7kI7aaxbqwWNb0AHiB0qBO89PZKPkoTmGOgdbrHDKD+0B2X4uTfJ/FT1R09r9gTsjUjNJotuog==}
     engines: {node: '>=0.10.0'}
@@ -4784,24 +4788,6 @@ packages:
       ts-node:
         optional: true
 
-  postcss-load-config@6.0.1:
-    resolution: {integrity: sha512-oPtTM4oerL+UXmx+93ytZVN82RrlY/wPUV8IeDxFrzIjXOLF1pN+EmKPLbubvKHT2HC20xXsCAH2Z+CKV6Oz/g==}
-    engines: {node: '>= 18'}
-    peerDependencies:
-      jiti: '>=1.21.0'
-      postcss: '>=8.0.9'
-      tsx: ^4.8.1
-      yaml: ^2.4.2
-    peerDependenciesMeta:
-      jiti:
-        optional: true
-      postcss:
-        optional: true
-      tsx:
-        optional: true
-      yaml:
-        optional: true
-
   postcss-nested@6.2.0:
     resolution: {integrity: sha512-HQbt28KulC5AJzG+cZtj9kvKB93CFCdLvog1WFLf1D+xmMvPGlBstkpTEZfK5+AN9hfJocyBFCNiqyS48bpgzQ==}
     engines: {node: '>=12.0'}
@@ -4970,10 +4956,6 @@ packages:
     resolution: {integrity: sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==}
     engines: {node: '>=8.10.0'}
 
-  readdirp@4.1.2:
-    resolution: {integrity: sha512-GDhwkLfywWL2s6vEjyhri+eXmfH6j1L7JE27WhqLeYzoh/A3DBaYGEj2H/HFZCn/kMfim73FXxEJTw06WtxQwg==}
-    engines: {node: '>= 14.18.0'}
-
   real-require@0.2.0:
     resolution: {integrity: sha512-57frrGM/OCTLqLOAh0mhVA9VBMHd+9U7Zb2THMGdBUoZVOtGbJzjxsYGDJ3A9AYYCP4hn6y1TVbaOfzWtm5GFg==}
     engines: {node: '>= 12.13.0'}
@@ -5109,11 +5091,14 @@ packages:
     resolution: {integrity: sha512-g6QUff04oZpHs0eG5p83rFLhHeV00ug/Yf9nZM6fLeUrPguBTkTQOdpAWWspMh55TZfVQDPaN3NQJfbVRAxdIw==}
     engines: {iojs: '>=1.0.0', node: '>=0.10.0'}
 
+
+
   rollup@4.52.0:
     resolution: {integrity: sha512-+IuescNkTJQgX7AkIDtITipZdIGcWF0pnVvZTWStiazUmcGA2ag8dfg0urest2XlXUi9kuhfQ+qmdc5Stc3z7g==}
     engines: {node: '>=18.0.0', npm: '>=8.0.0'}
     hasBin: true
 
+
   router@2.2.0:
     resolution: {integrity: sha512-nLTrUKm2UyiL7rlhapu/Zl45FwNgkZGaCpZbIHajDYgwlJCOzLSk+cIPAnsEqV955GjILJnKbdQC1nVPz+gAYQ==}
     engines: {node: '>= 18'}
@@ -5326,11 +5311,6 @@ packages:
     resolution: {integrity: sha512-i5uvt8C3ikiWeNZSVZNWcfZPItFQOsYTUAOkcUPGd8DqDy1uOUikjt5dG+uRlwyvR108Fb9DOd4GvXfT0N2/uQ==}
     engines: {node: '>= 12'}
 
-  source-map@0.8.0-beta.0:
-    resolution: {integrity: sha512-2ymg6oRBpebeZi9UUNsgQ89bhx01TcTkmNTGnNO88imTmbSgy4nfujrgVEFKWpMTEGA11EDkTt7mqObTPdigIA==}
-    engines: {node: '>= 8'}
-    deprecated: The work that was done in this beta branch won't be included in future versions
-
   space-separated-tokens@2.0.2:
     resolution: {integrity: sha512-PEGlAwrG8yXGXRjW32fGbg66JAlOAwbObuqVoJpv/mRgoWDQfgH1wDPvtzWyUSNAXBGSk8h755YDbbcEy3SH2Q==}
 
@@ -5505,6 +5485,8 @@ packages:
   through@2.3.8:
     resolution: {integrity: sha512-w89qg7PI8wAdvX60bMDP+bFoD5Dvhm9oLheFp5O4a2QF0cSBGsBX4qZmadPMvVqlLJBBci+WqGGOAPvcDeNSVg==}
 
+
+
   tinyexec@0.3.2:
     resolution: {integrity: sha512-KQQR9yN7R5+OSwaK0XQoj22pwHoTlgYqmUscPYoknOoWCWfj/5/ABTMRi69FrKU5ffPVh5QcFikpWJI/P1ocHA==}
 
@@ -5512,6 +5494,7 @@ packages:
     resolution: {integrity: sha512-j2Zq4NyQYG5XMST4cbs02Ak8iJUdxRM0XI5QyxXuZOzKOINmWurp3smXu3y5wDcJrptwpSjgXHzIQxR0omXljQ==}
     engines: {node: '>=12.0.0'}
 
+
   tldts-core@6.1.86:
     resolution: {integrity: sha512-Je6p7pkk+KMzMv2XXKmAE3McmolOQFdxkKw0R8EYNr7sELW46JqnNeTX8ybPiQgvg1ymCoF8LXs5fzFaZvJPTA==}
 
@@ -5534,13 +5517,6 @@ packages:
   tr46@0.0.3:
     resolution: {integrity: sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==}
 
-  tr46@1.0.1:
-    resolution: {integrity: sha512-dTpowEjclQ7Kgx5SdBkqRzVhERQXov8/l9Ft9dVM9fmg0W0KQSVaXX9T4i6twCPNtYiZM53lpSSUAwJbFPOHxA==}
-
-  tree-kill@1.2.2:
-    resolution: {integrity: sha512-L0Orpi8qGpRG//Nd+H90vFB+3iHnue1zSSGmNOOCh1GLJ7rUKVwV2HvijphGQS2UmhUZewS9VgvxYIdgr+fG1A==}
-    hasBin: true
-
   trim-lines@3.0.1:
     resolution: {integrity: sha512-kRj8B+YHZCc9kQYdWfJB2/oUl9rA99qbowYYBtr4ui4mZyAQ2JpvVBd/6U2YloATfqBhBTSMhTpgBHtU0Mf3Rg==}
 
@@ -5565,6 +5541,10 @@ packages:
   tslib@2.8.1:
     resolution: {integrity: sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==}
 
+
+  tsx@4.19.4:
+    resolution: {integrity: sha512-gK5GVzDkJK1SI1zwHf32Mqxf2tSJkNx+eYcNly5+nHvWqXUJYUkWBQtKauoESz3ymezAI++ZwT855x5p5eop+Q==}
+
   tsup@8.5.0:
     resolution: {integrity: sha512-VmBp77lWNQq6PfuMqCHD3xWl22vEoWsKajkF8t+yMBawlUS8JzEI+vOVMeuNZIuMML8qXRizFKi9oD5glKQVcQ==}
     engines: {node: '>=18'}
@@ -5586,6 +5566,7 @@ packages:
 
   tsx@4.20.5:
     resolution: {integrity: sha512-+wKjMNU9w/EaQayHXb7WA7ZaHY6hN8WgfvHNQ3t1PnU91/7O8TcTnIhCDYTZwnt8JsO9IBqZ30Ln1r7pPF52Aw==}
+
     engines: {node: '>=18.0.0'}
     hasBin: true
 
@@ -5824,9 +5805,6 @@ packages:
   webidl-conversions@3.0.1:
     resolution: {integrity: sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==}
 
-  webidl-conversions@4.0.2:
-    resolution: {integrity: sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg==}
-
   whatwg-encoding@3.1.1:
     resolution: {integrity: sha512-6qN4hJdMwfYBtE3YBTTHhoeuUrDBPZmbQaxWAqSALV/MeEnR5z1xd8UKud2RAkFoPkmB+hli1TZSnyi84xz1vQ==}
     engines: {node: '>=18'}
@@ -5838,9 +5816,6 @@ packages:
   whatwg-url@5.0.0:
     resolution: {integrity: sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==}
 
-  whatwg-url@7.1.0:
-    resolution: {integrity: sha512-WUu7Rg1DroM7oQvGWfOiAK21n74Gg+T4elXEQYkOhtyLeWiJFoOGLXPKI/9gzIie9CtwVLm8wtw6YJdKyxSjeg==}
-
   which-boxed-primitive@1.1.1:
     resolution: {integrity: sha512-TbX3mj8n0odCBFVlY8AxkqcHASw3L60jIuF8jFP78az3C2YhmGvqbHBpAjTRH2/xqYunrJ9g1jSyjCjpoWzIAA==}
     engines: {node: '>= 0.4'}
@@ -7384,6 +7359,9 @@ snapshots:
       - react-native-b4a
       - supports-color
 
+
+  '@shikijs/core@3.11.0':
+
   '@radix-ui/primitive@1.1.3': {}
 
   '@radix-ui/react-arrow@1.1.7(@types/react@19.1.13)(react-dom@18.3.1(react@19.1.1))(react@19.1.1)':
@@ -7630,6 +7608,7 @@ snapshots:
     optional: true
 
   '@shikijs/core@3.13.0':
+
     dependencies:
       '@shikijs/types': 3.13.0
       '@shikijs/vscode-textmate': 10.0.2
@@ -8501,19 +8480,20 @@ snapshots:
       base64-js: 1.5.1
       ieee754: 1.2.1
 
+
+
   bundle-require@5.1.0(esbuild@0.25.10):
     dependencies:
       esbuild: 0.25.10
       load-tsconfig: 0.2.5
 
+
   busboy@1.6.0:
     dependencies:
       streamsearch: 1.1.0
 
   bytes@3.1.2: {}
 
-  cac@6.7.14: {}
-
   cacheable-lookup@7.0.0: {}
 
   cacheable-request@10.2.14:
@@ -8607,10 +8587,6 @@ snapshots:
     optionalDependencies:
       fsevents: 2.3.3
 
-  chokidar@4.0.3:
-    dependencies:
-      readdirp: 4.1.2
-
   chownr@2.0.0: {}
 
   chromium-bidi@0.10.2(devtools-protocol@0.0.1464554):
@@ -8719,11 +8695,15 @@ snapshots:
       readable-stream: 2.3.8
       typedarray: 0.0.6
 
+
+  console-table-printer@2.12.1:
+
   confbox@0.1.8: {}
 
   consola@3.4.2: {}
 
   console-table-printer@2.14.6:
+
     dependencies:
       simple-wcswidth: 1.1.2
 
@@ -9464,10 +9444,13 @@ snapshots:
     dependencies:
       pend: 1.2.0
 
+
+
   fdir@6.5.0(picomatch@4.0.3):
     optionalDependencies:
       picomatch: 4.0.3
 
+
   fetch-cookie@3.1.0:
     dependencies:
       set-cookie-parser: 2.7.1
@@ -10427,8 +10410,6 @@ snapshots:
 
   lines-and-columns@1.2.4: {}
 
-  load-tsconfig@0.2.5: {}
-
   locate-character@3.0.0: {}
 
   locate-path@5.0.0:
@@ -10441,8 +10422,6 @@ snapshots:
 
   lodash.merge@4.6.2: {}
 
-  lodash.sortby@4.7.0: {}
-
   lodash.startcase@4.4.0: {}
 
   lodash.topath@4.5.2: {}
@@ -11419,8 +11398,11 @@ snapshots:
 
   picomatch@2.3.1: {}
 
+
+
   picomatch@4.0.3: {}
 
+
   pify@2.3.0: {}
 
   pify@4.0.1: {}
@@ -11504,6 +11486,7 @@ snapshots:
     optionalDependencies:
       postcss: 8.5.6
 
+
   postcss-load-config@6.0.1(jiti@1.21.7)(postcss@8.5.6)(tsx@4.20.5)(yaml@2.8.1):
     dependencies:
       lilconfig: 3.1.3
@@ -11513,6 +11496,7 @@ snapshots:
       tsx: 4.20.5
       yaml: 2.8.1
 
+
   postcss-nested@6.2.0(postcss@8.5.6):
     dependencies:
       postcss: 8.5.6
@@ -11703,8 +11687,6 @@ snapshots:
     dependencies:
       picomatch: 2.3.1
 
-  readdirp@4.1.2: {}
-
   real-require@0.2.0: {}
 
   recma-build-jsx@1.0.0:
@@ -11935,6 +11917,8 @@ snapshots:
 
   reusify@1.1.0: {}
 
+
+
   rollup@4.52.0:
     dependencies:
       '@types/estree': 1.0.8
@@ -11963,6 +11947,7 @@ snapshots:
       '@rollup/rollup-win32-x64-msvc': 4.52.0
       fsevents: 2.3.3
 
+
   router@2.2.0:
     dependencies:
       debug: 4.4.3
@@ -12278,10 +12263,6 @@ snapshots:
 
   source-map@0.7.6: {}
 
-  source-map@0.8.0-beta.0:
-    dependencies:
-      whatwg-url: 7.1.0
-
   space-separated-tokens@2.0.2: {}
 
   spawndamnit@3.0.1:
@@ -12522,6 +12503,8 @@ snapshots:
 
   through@2.3.8: {}
 
+
+
   tinyexec@0.3.2: {}
 
   tinyglobby@0.2.15:
@@ -12529,6 +12512,7 @@ snapshots:
       fdir: 6.5.0(picomatch@4.0.3)
       picomatch: 4.0.3
 
+
   tldts-core@6.1.86: {}
 
   tldts@6.1.86:
@@ -12547,12 +12531,6 @@ snapshots:
 
   tr46@0.0.3: {}
 
-  tr46@1.0.1:
-    dependencies:
-      punycode: 2.3.1
-
-  tree-kill@1.2.2: {}
-
   trim-lines@3.0.1: {}
 
   trim-trailing-lines@2.1.0: {}
@@ -12569,6 +12547,9 @@ snapshots:
 
   tslib@2.8.1: {}
 
+
+  tsx@4.19.4:
+
   tsup@8.5.0(jiti@1.21.7)(postcss@8.5.6)(tsx@4.20.5)(typescript@5.9.2)(yaml@2.8.1):
     dependencies:
       bundle-require: 5.1.0(esbuild@0.25.10)
@@ -12598,6 +12579,7 @@ snapshots:
       - yaml
 
   tsx@4.20.5:
+
     dependencies:
       esbuild: 0.25.10
       get-tsconfig: 4.10.1
@@ -12871,8 +12853,6 @@ snapshots:
 
   webidl-conversions@3.0.1: {}
 
-  webidl-conversions@4.0.2: {}
-
   whatwg-encoding@3.1.1:
     dependencies:
       iconv-lite: 0.6.3
@@ -12884,12 +12864,6 @@ snapshots:
       tr46: 0.0.3
       webidl-conversions: 3.0.1
 
-  whatwg-url@7.1.0:
-    dependencies:
-      lodash.sortby: 4.7.0
-      tr46: 1.0.1
-      webidl-conversions: 4.0.2
-
   which-boxed-primitive@1.1.1:
     dependencies:
       is-bigint: 1.1.0
diff --git a/scripts/build-cli.mjs b/scripts/build-cli.mjs
new file mode 100644
index 000000000..d7b1e43fb
--- /dev/null
+++ b/scripts/build-cli.mjs
@@ -0,0 +1,82 @@
+import process from "node:process";
+import { build } from "esbuild";
+import { chmodSync, copyFileSync, mkdirSync, readFileSync } from "node:fs";
+import { spawnSync } from "node:child_process";
+import path from "node:path";
+
+const pkgJson = JSON.parse(
+  readFileSync(new URL("../package.json", import.meta.url)),
+);
+const externalDeps = Array.from(
+  new Set([
+    ...Object.keys(pkgJson.dependencies ?? {}),
+    ...Object.keys(pkgJson.peerDependencies ?? {}),
+    ...Object.keys(pkgJson.optionalDependencies ?? {}),
+  ]),
+);
+
+const distDir = path.join("dist", "evals");
+const cliOutfile = path.join(distDir, "cli.js");
+const configSource = path.join("evals", "evals.config.json");
+const configDestination = path.join(distDir, "evals.config.json");
+
+const commonOptions = {
+  bundle: true,
+  platform: "node",
+  target: "es2022",
+  sourcemap: true,
+  packages: "external",
+  external: externalDeps,
+};
+
+const shouldLink = (() => {
+  const flag = process.env.STAGEHAND_SKIP_NPM_LINK ?? "";
+  return flag !== "1" && flag.toLowerCase() !== "true";
+})();
+
+async function main() {
+  mkdirSync(distDir, { recursive: true });
+
+  await build({
+    entryPoints: ["evals/cli.ts"],
+    format: "cjs",
+    outfile: cliOutfile,
+    banner: { js: "#!/usr/bin/env node" },
+    ...commonOptions,
+  });
+
+  copyFileSync(configSource, configDestination);
+
+  try {
+    chmodSync(cliOutfile, 0o755);
+  } catch (error) {
+    const maybeSystemError = error;
+    if (
+      !maybeSystemError ||
+      typeof maybeSystemError !== "object" ||
+      !("code" in maybeSystemError) ||
+      (maybeSystemError.code !== "ENOSYS" && maybeSystemError.code !== "EPERM")
+    ) {
+      throw error;
+    }
+  }
+
+  if (!shouldLink) {
+    console.warn("Skipping npm link because STAGEHAND_SKIP_NPM_LINK is set.");
+    return;
+  }
+
+  const linkResult = spawnSync("npm", ["link"], {
+    stdio: "inherit",
+    shell: process.platform === "win32",
+  });
+
+  if (linkResult.status !== 0) {
+    process.exit(linkResult.status ?? 1);
+  }
+}
+
+main().catch((error) => {
+  console.error(error);
+  process.exit(1);
+});
diff --git a/scripts/build-e2e.mjs b/scripts/build-e2e.mjs
new file mode 100644
index 000000000..4c2899781
--- /dev/null
+++ b/scripts/build-e2e.mjs
@@ -0,0 +1,149 @@
+import fs from "node:fs";
+import path from "node:path";
+import process from "node:process";
+import { spawnSync } from "node:child_process";
+import { fileURLToPath } from "node:url";
+import { build } from "esbuild";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const ROOT = path.resolve(__dirname, "..");
+const SRC_DIR = path.join(ROOT, "evals", "deterministic");
+const OUT_BASE = path.join(ROOT, "dist", "playwright");
+const OUT_DIR = path.join(OUT_BASE, "evals", "deterministic");
+const STAGEHAND_ENTRY = path.join(ROOT, "dist", "index.js");
+const IMPORT_META_DECL =
+  'var import_meta = { url: require("node:url").pathToFileURL(__filename).href };';
+
+const shouldLink = (() => {
+  const flag = process.env.STAGEHAND_SKIP_NPM_LINK ?? "";
+  return flag !== "1" && flag.toLowerCase() !== "true";
+})();
+
+function ensureDir(dir) {
+  fs.mkdirSync(dir, { recursive: true });
+}
+
+function copyDir(src, dest) {
+  if (!fs.existsSync(src)) return;
+  ensureDir(dest);
+  for (const entry of fs.readdirSync(src, { withFileTypes: true })) {
+    const source = path.join(src, entry.name);
+    const target = path.join(dest, entry.name);
+    if (entry.isDirectory()) copyDir(source, target);
+    else fs.copyFileSync(source, target);
+  }
+}
+
+function patchImportMeta(filePath) {
+  let content = fs.readFileSync(filePath, "utf8");
+  if (!content.includes("var import_meta = {}")) {
+    return;
+  }
+
+  const importMetaPattern = /var import_meta = \{\};/g;
+  if (importMetaPattern.test(content)) {
+    content = content.replace(importMetaPattern, IMPORT_META_DECL);
+  }
+  fs.writeFileSync(filePath, content, "utf8");
+}
+
+function rewriteStagehandImports(filePath) {
+  let content = fs.readFileSync(filePath, "utf8");
+  if (!content.includes("@browserbasehq/stagehand")) {
+    return;
+  }
+
+  const relative = path.relative(path.dirname(filePath), STAGEHAND_ENTRY);
+  const basePath = relative.startsWith(".") ? relative : "./" + relative;
+  const importPath = basePath.split(path.sep).join("/");
+
+  content = content.replaceAll(
+    'require("@browserbasehq/stagehand")',
+    'require("' + importPath + '")',
+  );
+  content = content.replaceAll(
+    'from "@browserbasehq/stagehand"',
+    'from "' + importPath + '"',
+  );
+
+  fs.writeFileSync(filePath, content, "utf8");
+}
+
+function traverseOutputs(dir) {
+  for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
+    const entryPath = path.join(dir, entry.name);
+    if (entry.isDirectory()) {
+      traverseOutputs(entryPath);
+    } else if (entry.isFile() && entry.name.endsWith(".js")) {
+      patchImportMeta(entryPath);
+      rewriteStagehandImports(entryPath);
+    }
+  }
+}
+
+async function main() {
+  ensureDir(OUT_DIR);
+
+  const entryPoints = [];
+  const collectEntryPoints = (dir) => {
+    for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
+      const entryPath = path.join(dir, entry.name);
+      if (entry.isDirectory()) collectEntryPoints(entryPath);
+      else if (entry.isFile() && entryPath.endsWith(".ts")) {
+        entryPoints.push(entryPath);
+      }
+    }
+  };
+  collectEntryPoints(SRC_DIR);
+
+  const pkgJson = JSON.parse(
+    fs.readFileSync(path.join(ROOT, "package.json"), "utf8"),
+  );
+  const externalDeps = Array.from(
+    new Set([
+      ...Object.keys(pkgJson.dependencies ?? {}),
+      ...Object.keys(pkgJson.peerDependencies ?? {}),
+      ...Object.keys(pkgJson.optionalDependencies ?? {}),
+      "@playwright/test",
+      "playwright",
+    ]),
+  );
+
+  await build({
+    entryPoints,
+    outbase: ROOT,
+    outdir: OUT_BASE,
+    platform: "node",
+    target: "es2022",
+    format: "cjs",
+    bundle: true,
+    sourcemap: true,
+    tsconfig: path.join(SRC_DIR, "tsconfig.playwright.json"),
+    packages: "external",
+    external: externalDeps,
+    banner: {
+      js: "var __name = (target, value) => { try { Object.defineProperty(target, 'name', { value, configurable: true }); } catch {} return target; };",
+    },
+    logLevel: "silent",
+  });
+
+  traverseOutputs(OUT_BASE);
+
+  copyDir(path.join(SRC_DIR, "auxiliary"), path.join(OUT_DIR, "auxiliary"));
+
+  if (shouldLink) {
+    const linkResult = spawnSync("npm", ["link"], {
+      stdio: "inherit",
+      shell: process.platform === "win32",
+    });
+
+    if ((linkResult.status ?? 0) !== 0) {
+      process.exit(linkResult.status ?? 1);
+    }
+  }
+}
+
+main().catch((err) => {
+  console.error(err);
+  process.exit(1);
+});
diff --git a/scripts/build-lib.mjs b/scripts/build-lib.mjs
new file mode 100644
index 000000000..72f29035d
--- /dev/null
+++ b/scripts/build-lib.mjs
@@ -0,0 +1,40 @@
+import fs from "node:fs";
+import process from "node:process";
+import { build } from "esbuild";
+
+const pkgJson = JSON.parse(
+  fs.readFileSync(new URL("../package.json", import.meta.url)),
+);
+const externalDeps = Array.from(
+  new Set([
+    ...Object.keys(pkgJson.dependencies ?? {}),
+    ...Object.keys(pkgJson.peerDependencies ?? {}),
+    ...Object.keys(pkgJson.optionalDependencies ?? {}),
+  ]),
+);
+
+const commonOptions = {
+  bundle: true,
+  platform: "node",
+  target: "es2022",
+  sourcemap: true,
+  banner: {
+    js: "var __name = (target, value) => { try { Object.defineProperty(target, 'name', { value, configurable: true }); } catch {} return target; };",
+  },
+  packages: "external",
+  external: externalDeps,
+};
+
+async function main() {
+  await build({
+    entryPoints: ["lib/index.ts"],
+    format: "esm",
+    outfile: "dist/index.js",
+    ...commonOptions,
+  });
+}
+
+main().catch((error) => {
+  console.error(error);
+  process.exit(1);
+});
diff --git a/scripts/run-playwright.mjs b/scripts/run-playwright.mjs
new file mode 100644
index 000000000..10566db8f
--- /dev/null
+++ b/scripts/run-playwright.mjs
@@ -0,0 +1,23 @@
+import { spawnSync } from "node:child_process";
+import { createRequire } from "node:module";
+import process from "node:process";
+
+// Pass-through runner that executes the compiled Playwright config.
+// We intentionally avoid tsx/ts-node to sidestep worker loader timing issues.
+
+const args = process.argv.slice(2);
+const cliArgs = args[0] === "test" ? args : ["test", ...args];
+const require = createRequire(import.meta.url);
+const playwrightCli = require.resolve("@playwright/test/cli");
+
+const result = spawnSync(process.execPath, [playwrightCli, ...cliArgs], {
+  stdio: "inherit",
+  env: { ...process.env },
+});
+
+if (result.error) {
+  console.error(result.error);
+  process.exit(1);
+}
+
+process.exit(result.status ?? 0);
diff --git a/tsconfig.build.json b/tsconfig.build.json
new file mode 100644
index 000000000..ff5b5220f
--- /dev/null
+++ b/tsconfig.build.json
@@ -0,0 +1,21 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "declaration": true,
+    "emitDeclarationOnly": true,
+    "outDir": "dist",
+    "noEmit": false,
+    "stripInternal": false
+  },
+  "include": [
+    "lib/**/*.ts",
+    "lib/**/*.tsx",
+    "types/**/*.ts"
+  ],
+  "exclude": [
+    "node_modules",
+    "dist",
+    "types/evals.ts",
+    "evals/**"
+  ]
+}