Real AI agent use cases, with sources and setup prompts

Use all Codex Plugins inside Pi

Shipped Use all Codex Plugins inside Pi and shared it as a Show HN.

Free tier1-2 hoursIntermediateSource linked

Source

alexandroskyr on Hacker News · 2026-10-02 · Project link

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

What they did

Shipped Use all Codex Plugins inside Pi and shared it as a Show HN.

Result (as claimed)

Open-sourced on GitHub; shared on Show HN (22 points).

Tools they used

Cost: OpenAI Codex: free plan, paid from $8/mo. Checked 2026-10-14.

Set it up

  1. Pick a contained repo or task

    Start on a branch or side project where mistakes are cheap.

  2. Install and configure

    Set up OpenAI Codex, ChatGPT. Read what it can run on your machine and limit permissions where possible.

  3. Run it on a real task

    Give it a well-scoped issue and let it work. Review the diff like any pull request.

  4. Add guardrails

    Keep tests and CI in the loop, and never let an agent push to main or touch production secrets unattended.

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: Use all Codex Plugins inside Pi
What the original author did: Shipped Use all Codex Plugins inside Pi and shared it as a Show HN.
Reported result (as claimed by the author): Open-sourced on GitHub; shared on Show HN (22 points).
Source: https://news.ycombinator.com/item?id=49929381
Tools they used: OpenAI Codex, ChatGPT
Category: Dev & ops

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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