# 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.

- Canonical: https://extractfeed.io/story/stagehand-python-4-2-0a0-dev1528-restores-v3-network-capture-ecdec96/
- JSON: https://extractfeed.io/api/v1/stories/stagehand-python-4-2-0a0-dev1528-restores-v3-network-capture-ecdec96.json
- Beat: Open Source & Tooling · Evidence: Primary source · Type/significance: release/2 · First seen: 2026-09-22T23:45:17.273043+00:00 · Updated: 2026-09-22T23:45:17.273043+00:00 · Edition: 2026-11-05
- Framing: model-written (headline, standfirst, why it matters, tags); source facts deterministic

## 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 \(\#2849\)](https://github.com/browserbase/stagehand/releases/tag/stagehand-python%404.2.0a0.dev1528)

## 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?

Topics: Stagehand, Browserbase, stagehand, python-sdk, cdp, network-capture, cli, regression-fix

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