Show HN: Libretto – Making AI browser automations deterministic(github.com)
47 pointsby muchael4 hours ago12 comments
  • z3ugma6 minutes ago
    Love it! Do you have a BAA with Claude though? Otherwise, your demo is likely exposing PHI to 3rd parties and exposing you to risk related to HIPAA
    • muchaela minute ago
      Yes, we do have a BAA + ZDR with Anthropic and OpenAI! Was using Codex in the demo
  • alexbike36 minutes ago
    The network-request-first approach is the right call. DOM parsing is fragile because it's scraping a rendering artifact — any style refactor, framework upgrade, or A/B test can silently break it. Intercepting the actual API calls the browser is already making is closer to testing the contract, not the presentation.

    The healthcare context makes this especially sharp. Those portals are notoriously inconsistent and rarely built for automation. Would be curious how you handle cases where the app uses WebSockets or chunked responses instead of clean REST calls.

  • daveguy10 minutes ago
    What is the license?

    Edit: nevermind. I see from the website it is MIT. Probably should add a COPYING.md or LICENSE.md to the repository itself.

  • etwiggan hour ago
    Thanks for this! We have clear answers for things that are 100% and 0% automated, but it’s always that 80%-99% automated slice where the frontier is, great idea.
  • seagull2 hours ago
    I've wanted something like this for ages, excited to try this out!
  • messh2 hours ago
    how does it differ from playwright-cli?
    • muchaelan hour ago
      At its core, libretto generates, validates, and helps with debugging RPA scripts. As far as I understand tools like playwright CLI are more focused on letting your agent use playwright to perform one-off automations.

      The implementation is also pretty different:

      - libretto gives your agent a single exec tool (instead of different tools for each action) so it can write arbitrary playwright/javascript and is more context efficient

      - Also we gave libretto instructions on bot detection avoidance so that it will prefer using network requests for automation (something that other tools don’t support), but will fall back to playwright if it identifies network requests as too risky

  • gbibas2 hours ago
    Cool. Thank you for sharing. While AI tools are extremely powerful, packages like this help create some good standards and stepping stones for connectivity that the models haven’t gotten around to yet. Thanks again.
  • arpadavan hour ago
    this looks awesome
  • devstatic2 hours ago
    this is interesting
  • KaiShips39 minutes ago
    [dead]
  • 2 hours ago
    undefined
  • surgical_fire2 hours ago
    For a moment I throught it was something about libretro. As an avid RetroArch user the headline picked my interest.

    Then I clicked and realized it's just some other AI shit.

    • muchaela few seconds ago
      Lol sorry for the misleading click. We named it libretto after the term in theater, inspired by Playwright. No retro gaming here, just browser automation!