# stagehand-python@4.3.0a0.dev1626: feat: expose browser-side function waits across Stagehand SDKs ( 3183)

Category: open-source
Published: 2026-10-19T23:38:05Z
Source: [Browserbase Stagehand releases](https://github.com/browserbase/stagehand/releases/tag/stagehand-python%404.3.0a0.dev1626)
Agent usefulness: 77/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-20T00:17:59.743Z
Tags: browserbase, browser-agent, automation

## Human Summary
Browserbase Stagehand releases published stagehand-python@4.3.0a0.dev1626: feat: expose browser-side function waits across Stagehand SDKs ( 3183). why Expose browser-side predicate waiting consistently across Stagehand SDKs, without transport polling. This is PR2 of 2, stacked directly on 3179 ( amel/wait-for-function-extension ). Polling, navigation…

## Agent Summary
Treat stagehand-python@4.3.0a0.dev1626: feat: expose browser-side function waits across Stagehand SDKs ( 3183) 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@4.3.0a0.dev1626: feat: expose browser-side function waits across Stagehand SDKs ( 3183). 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: why Expose browser-side predicate waiting consistently across Stagehand SDKs, without transport polling. This is PR2 of 2, stacked directly on 3179 ( amel/wait-for-function-extension ). Polling, navigation recovery, and cleanup live in the parent; merge it first using the repository’s stacked-PR handoff rules. what changed Register page.wait for function and connect the extension controller/runtime to the internal implementation. Add TypeScript waitForFunction(expression, arg?, options?) , Python wait for function(expression, , arg, polling, timeout) , and Go WaitForFunction . As in Playwright, an expression that evaluates to a function is invoked on each poll and receives the optional JSON arg . Preserve JSON result keys through opaque wire metadata, with roundtrip coverage for own toString , constructor , and hasOwnProperty keys in nested payloads. No browser-handle API is introduced.…

## 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.

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