Real AI agent use cases, with sources and setup prompts

Let Claude and Codex work on trading charts like a human would

Built OpenChart, an open-source TradingView-style workspace where your existing AI plans annotate and act on charts.

Free tier1 dayIntermediateSource linked

Source

Warren93 on Hacker News · 2026-10-06 · Project link

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

What they did

Built OpenChart, an open-source TradingView-style workspace where your existing AI plans annotate and act on charts.

Result (as claimed)

Agents work through charts instead of only CLIs.

Tools they used

Claude CodeOpenAI Codex

Cost: Claude Code: free plan, paid from $17/mo; OpenAI Codex: free plan, paid from $8/mo. Checked 2026-10-14.

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 Claude Code 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: Let Claude and Codex work on trading charts like a human would
What the original author did: Built OpenChart, an open-source TradingView-style workspace where your existing AI plans annotate and act on charts.
Reported result (as claimed by the author): Agents work through charts instead of only CLIs.
Source: https://news.ycombinator.com/item?id=49979793
Tools they used: Claude Code, OpenAI Codex
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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