alt.hn

7/21/2026 at 9:01:57 PM

Show HN: Browser Tools SDK – an optimal browser harness for agents

https://libretto.sh/browser-tools

by tanishqkanc

7/21/2026 at 10:18:32 PM

What make browser tools sdk more efficient than just using playwright-cli? With playwright-cli agent typically executes code written with playwright too.

Where do your sdk’s efficiency boosts come from?

by opwizardx

7/22/2026 at 1:33:14 PM

with playwright-cli, the agent makes reasoning decisions between each cli call. with browser-tools, the agent can write big playwright code blocks that execute in one go meaning less turns and the agent can select exactly what it needs from the result.

I think the code version of playwright-cli is still supported but we just use the default instructions given by the cli which push it towards per cli call usage

by tanishqkanc

7/21/2026 at 11:10:10 PM

[flagged]

by tanishqkanc

7/22/2026 at 6:14:43 AM

Does it use the user login or open a headless broswer?

by chriswunan

7/22/2026 at 1:29:38 PM

If you’re using a local provider, it can open browsers in headed mode so it can log in. For remote providers, you’ll need to ask the agent for the live url which will be a proxy feed of the page to log in

by tanishqkanc

7/22/2026 at 3:13:11 AM

Yeah to get any serious attention, publish the 26 tasks, and compare the session and tokens before you make such claims.

by cognitiveinline

7/22/2026 at 1:52:08 PM

[flagged]

by kalpitrathore