Real AI agent use cases, with sources and setup prompts

Let Claude edit Word documents through an open-source Word clone

WordCraft is a clean-room open-source rebuild of Microsoft Word in Rust that reads and writes .docx. It was designed to be driven by people and AI agents: 422 commands are exposed through a CLI and an MCP server you can add to Claude Code, with folder limits for what the agent may read and write.

Free tier20 minutesIntermediateSource linked

Source

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

Written in our own words. Credit to the original author. Link checked 2026-10-17.

What they did

WordCraft is a clean-room open-source rebuild of Microsoft Word in Rust that reads and writes .docx. It was designed to be driven by people and AI agents: 422 commands are exposed through a CLI and an MCP server you can add to Claude Code, with folder limits for what the agent may read and write.

Result (as claimed)

Open source for Mac, Windows, Linux, BSD and web; 101 points on Hacker News.

Tools they used

Claude Code

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

Set it up

  1. Map the task

    Write the trigger, the inputs, the decisions and the output. Note which steps need a human yes.

  2. Connect the tools

    Set up Claude Code with the narrowest permissions that work. Use a test account or sandbox first.

  3. Build the workflow

    Create the steps in order. Add an approval step before anything sends, pays or deletes.

  4. Run it on real but low-stakes data

    Run a few times, read every output, and fix prompts or rules that misfire.

  5. Schedule and monitor

    Turn on the schedule or trigger, and add a daily summary or alert so you notice failures.

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 edit Word documents through an open-source Word clone
What the original author did: WordCraft is a clean-room open-source rebuild of Microsoft Word in Rust that reads and writes .docx. It was designed to be driven by people and AI agents: 422 commands are exposed through a CLI and an MCP server you can add to Claude Code, with folder limits for what the agent may read and write.
Reported result (as claimed by the author): Open source for Mac, Windows, Linux, BSD and web; 101 points on Hacker News.
Source: https://news.ycombinator.com/item?id=50050370
Tools they used: Claude Code
Category: Automation & business

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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Guides for this use case

How to vibe code an app with Claude Code · How to build AI agents for SEO and ads · How to run multiple coding agents together · How to build an MCP server for AI agents

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