Libretto

Judgement

What it is

Developer tool

What it does

A toolkit for coding agents such as Claude Code and Codex to build, debug and maintain reliable browser automation scripts.

Adopt it when

You use a coding agent to write browser automations and want them to come out as maintainable code.

Watch out

Created in 2026 and still at 0.x.

Ready for

Experimental

Runs as

Command line and library

Built with

TypeScript

How established

Young: started 8 months ago, latest release v0.6.45.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-03 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Libretto → TypeScript → Go → runs on a microchip

How compilers were built, back to punched paper tape

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