Stagehand Python 4.2.0a0.dev1528 restores V3 network capture via CDP sidecar
Stagehand released a dev build that reimplements Browse V3 network capture for the Python SDK using a CLI-private CDP sidecar, avoiding changes to the core protocol or public SDKs.
Briefing
- Stagehand: Stagehand released a dev build that reimplements Browse V3 network capture for the Python SDK using a CLI-private CDP sidecar, avoiding changes to the core protocol or public SDKs.
Why it matters
This fix addresses a regression in network capture functionality for users migrating from Stagehand V3 to V4, but deliberately keeps the network-event schema out of the public API. That means developers relying on network capture in automation scripts will need to use the CLI sidecar approach rather than expecting a stable, documented protocol endpoint, which could complicate integration with custom tooling.
Sources
- Primary source · Stagehand · 2026-09-22 — browserbase/stagehand stagehand-python@4.2.0a0.dev1528: fix(cli): restore V3 network capture through a CDP sidecar (#2849)
Watch next
Will Stagehand eventually commit to a public network-event schema, or will the CDP sidecar remain the long-term solution for network capture?