# stagehand-python@4.2.0a0.dev1587: Point eval sites at Vercel instead of GitHub Pages ( 3141)

Category: open-source
Published: 2026-10-08T03:13:33Z
Source: [Browserbase Stagehand releases](https://github.com/browserbase/stagehand/releases/tag/stagehand-python%404.2.0a0.dev1587)
Agent usefulness: 77/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-08T12:17:41.118Z
Tags: browserbase, browser-agent, automation

## Human Summary
Browserbase Stagehand releases published stagehand-python@4.2.0a0.dev1587: Point eval sites at Vercel instead of GitHub Pages ( 3141). GitHub Pages has been unreliable for the eval sites, so they now also deploy to Vercel at https://stagehand-eval-sites.vercel.app/ . This PR swaps the host. Paths are unchanged:…

## Agent Summary
Treat stagehand-python@4.2.0a0.dev1587: Point eval sites at Vercel instead of GitHub Pages ( 3141) as an official release signal. Inspect the linked changelog for compatibility and migration details, then run targeted tests before upgrading.

## Body
Browserbase Stagehand releases published stagehand-python@4.2.0a0.dev1587: Point eval sites at Vercel instead of GitHub Pages ( 3141). This automated release-watch entry was generated from the project's official GitHub release feed and is kept separate from human-reviewed editorial analysis. Release notes: GitHub Pages has been unreliable for the eval sites, so they now also deploy to Vercel at https://stagehand-eval-sites.vercel.app/ . This PR swaps the host. Paths are unchanged: https://browserbase.github.io/stagehand-eval-sites/sites/ /… https://stagehand-eval-sites.vercel.app/sites/ /… What changed (76 files) Every browserbase.github.io/stagehand-eval-sites/ URL across evals tasks, sdk-ts tests, the TS/Python/Go examples and the docs is now the Vercel URL. git grep 'github\.io/stagehand-eval-sites' matches only get url.ts . packages/evals/core/tasks/page-info/get url.ts stored the host as an escaped regex. Its allowlist now accepts both hosts. oxfmt reflowed lines where the shorter URL now fits on one line. Apart from get url.ts , each file matches main once the host is normalized and whitespace and commas are ignored. Verified against the Vercel host All 114 files under sites/ are…

## Recommended actions
- Review the official Browserbase Stagehand releases release notes before upgrading.
- Check compatibility, migration, and security notes against your current agent stack.
- Run focused regression tests before production rollout.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.