Stagehand Python v4 alpha restores server-side caching as default

Stagehand Python v4.2.0a0.dev1530 flips server-side caching from opt-in back to on-by-default, matching v3 behavior after an upgrade gap silently dropped caching for users who did not opt in.

Markdown twin JSON

Open Source & Tooling Primary source release / significance 2

Briefing

Stagehand: Stagehand Python v4.2.0a0.dev1530 flips server-side caching from opt-in back to on-by-default, matching v3 behavior after an upgrade gap silently dropped caching for users who did not opt in.

Why it matters

This patch fixes a silent regression in v4 where users upgrading from v3 lost caching without any error or warning. Restoring caching as default reduces unnecessary repeat requests and improves performance for all users, making the upgrade path safer and more predictable.

Sources

Primary source · Stagehand · 2026-09-22 — browserbase/stagehand stagehand-python@4.2.0a0.dev1530: [AP-2925] Enable server-side caching by default in v4 (#2964)

Watch next

Will this caching default change be backported to stable v4 releases before the alpha tag is dropped?

Topics: Browserbase, Stagehand, stagehand, python, caching, regression-fix, open-source