libretto: The AI toolkit for building reliable browser automations

by cashew-labs · Codex Skill · ★ 905

Last updated: · Indexed by AgentSkillsHub · Auto-synced every 8h

How to install libretto

npm install libretto
npx libretto setup

Taken from the project's README on GitHub. Check the security audit before running it.

Security audit verdict: SAFE · quality 74/100

None of the 42 rules matched — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

automationbrowserclaude-codecodexrpa

Quick Facts

Stars905
Forks71
LanguageTypeScript
CategoryCodex Skill
LicenseMIT
Quality Score74/100
Open Issues20
Last Updated2026-08-21
Created2026-03-02
Platformsbrowser, claude-code, codex, node
Est. Tokens~15k

About libretto

Libretto Libretto is a toolkit for building robust web integrations. It gives your coding agent a live browser and a token-efficient CLI to: Inspect live pages with minimal context overhead Capture network traffic to reverse-engineer site APIs Record user actions and replay them as automation scripts Debug broken workflows interactively against the real site We at Saffron Health built Libretto to...

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

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