Real AI agent use cases, with sources and setup prompts

Build a hold-to-talk Mac assistant on your Claude plan

Ninth-grader built Atticus, a macOS hold-to-talk assistant that runs tasks via Claude -p without a separate API key.

Free tier1 weekIntermediateSource linked

Source

SaarthRanka on Hacker News · 2026-10-12 · Project link

Written in our own words. Credit to the original author. Link checked 2026-10-15.

What they did

Ninth-grader built Atticus, a macOS hold-to-talk assistant that runs tasks via Claude -p without a separate API key.

Result (as claimed)

Open-sourced; uses Claude Pro or Max plan instead of API billing.

Tools they used

Claude Code

Cost: Claude Code: free plan, paid from $17/mo. Checked 2026-10-14.

Set it up

  1. Define the job

    Say exactly what you want done and what the agent may and may not do on your behalf.

  2. Share only what is needed

    Give Claude Code the minimum files or access required. Avoid sharing passwords in chat when a safer login flow exists.

  3. Review the plan

    Ask the agent to show its plan or draft before it acts, and approve each step that has real consequences.

  4. Check the result

    Confirm the outcome yourself (order placed, request sent, document understood) and keep a record.

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

Goal: Build a hold-to-talk Mac assistant on your Claude plan
What the original author did: Ninth-grader built Atticus, a macOS hold-to-talk assistant that runs tasks via Claude -p without a separate API key.
Reported result (as claimed by the author): Open-sourced; uses Claude Pro or Max plan instead of API billing.
Source: https://news.ycombinator.com/item?id=50049588
Tools they used: Claude Code
Category: Personal & life

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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