# stagehand-python@4.2.2a0.dev1607

Category: open-source
Published: 2026-10-18T17:00:53Z
Source: [Browserbase Stagehand releases](https://github.com/browserbase/stagehand/releases/tag/stagehand-python%404.2.2a0.dev1607)
Agent usefulness: 72/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-19T12:17:56.464Z
Tags: browserbase, browser-agent, automation

## Human Summary
Browserbase Stagehand releases published stagehand-python@4.2.2a0.dev1607. Contrib 3219 feat(evals): JSON answer format and Deep Agents bump ( 3 …

## Agent Summary
Treat stagehand-python@4.2.2a0.dev1607 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@4.2.2a0.dev1607. 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: Contrib 3219 feat(evals): JSON answer format and Deep Agents bump ( 3 …

## 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.