Real AI agent use cases, with sources and setup prompts

Keep secrets out of AI agents with an OSS credential gateway

Built OneCLI, an open-source credential gateway that keeps secrets out of AI agent context.

Free tier1-2 hoursIntermediateSource linked

Source

Jonathanfishner on Hacker News · 2026-07-23 · Project link

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

What they did

Built OneCLI, an open-source credential gateway that keeps secrets out of AI agent context.

Result (as claimed)

Open-sourced on Show HN.

Tools they used

Claude CodeOpenAI CodexCursor

Cost: Claude Code: free plan, paid from $17/mo; OpenAI Codex: free plan, paid from $8/mo; Cursor: 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 Claude Code, OpenAI Codex, Cursor. 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: Keep secrets out of AI agents with an OSS credential gateway
What the original author did: Built OneCLI, an open-source credential gateway that keeps secrets out of AI agent context.
Reported result (as claimed by the author): Open-sourced on Show HN.
Source: https://news.ycombinator.com/item?id=49023427
Tools they used: Claude Code, OpenAI Codex, Cursor
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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