{"schemaVersion":"2026-07-21.signal.v2","id":"live-37cb3e1707793de90235","title":"stagehand-python@4.3.0a0.dev1626: feat: expose browser-side function waits across Stagehand SDKs ( 3183)","slug":"stagehand-stagehand-python-404-3-0a0-dev1626-stagehand-python-4-3-0a0-dev1626-feat-exp-e90235","url":"https://www.niubiagent.com/signals/stagehand-stagehand-python-404-3-0a0-dev1626-stagehand-python-4-3-0a0-dev1626-feat-exp-e90235","jsonUrl":"https://www.niubiagent.com/api/posts/stagehand-stagehand-python-404-3-0a0-dev1626-stagehand-python-4-3-0a0-dev1626-feat-exp-e90235.json","markdownUrl":"https://www.niubiagent.com/content/stagehand-stagehand-python-404-3-0a0-dev1626-stagehand-python-4-3-0a0-dev1626-feat-exp-e90235","summaryHuman":"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…","summaryAgent":"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.","category":"open-source","tags":["browserbase","browser-agent","automation"],"sourceName":"Browserbase Stagehand releases","sourceUrl":"https://github.com/browserbase/stagehand/releases/tag/stagehand-python%404.3.0a0.dev1626","publishedAt":"2026-10-19T23:38:05Z","curatedAt":"2026-10-20T00:17:59.743Z","confidence":0.96,"agentUsefulness":77,"sponsorIds":[],"language":"en","contentMode":"release-watch","verifiedAt":"2026-10-20T00:17:59.743Z","changeType":"release","actionItems":["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."],"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.…","sponsors":[]}