Real AI agent use cases, with sources and setup prompts

Libretto PR agents: Automatically fix failing playwright scripts

Built Libretto PR agents, automatically fix failing playwright scripts.

See pricing page1-2 hoursIntermediateSource linked

Source

muchael on Hacker News · 2026-07-16 · Project link

Written in our own words. Credit to the original author. Link checked 2026-10-16.

What they did

Built Libretto PR agents, automatically fix failing playwright scripts.

Result (as claimed)

Launched publicly; shared on Show HN (22 points).

Tools they used

playwright

Cost: Pricing depends on the tools you pick; check each official pricing page.

Set it up

  1. Gather the documents

    Collect statements, bills, invoices or tax documents for the period you want reviewed.

  2. Ask for an audit, not actions

    Have playwright list findings, amounts and suggested next steps before it does anything.

  3. Approve each action

    Approve cancellations, disputes or payments one at a time. Never give an agent open-ended access to move money.

  4. Track the result

    Record what changed and what you saved so you can check it next month. This is not financial advice.

Copy the full setup prompt

Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.

You are helping me set up this AI use case end to end in Claude Code.

Goal: Libretto PR agents: Automatically fix failing playwright scripts
What the original author did: Built Libretto PR agents, automatically fix failing playwright scripts.
Reported result (as claimed by the author): Launched publicly; shared on Show HN (22 points).
Source: https://news.ycombinator.com/item?id=48939710
Tools they used: playwright
Category: Money

Please:
1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like).
2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure.
3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data.
4. Finish with a checklist to run it again next time.

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