Real AI agent use cases, with sources and setup prompts

Build a Redis-compatible database in Rust with Claude as your pair

A developer started KiviDB in February to learn Rust after hitting GC pauses and out-of-memory crashes with Dragonfly at work. He used AI a lot but made the design decisions himself, based on tests Claude picked from his history of troubleshooting sessions. It speaks RESP2 and RESP3, shards the keyspace across threads and uses io_uring on Linux.

See pricing pageWeeksAdvancedSource linked

Source

murtazayusuf on Hacker News · 2026-10-19 · Project link

Written in our own words. Credit to the original author. Link checked 2026-10-19.

What they did

A developer started KiviDB in February to learn Rust after hitting GC pauses and out-of-memory crashes with Dragonfly at work. He used AI a lot but made the design decisions himself, based on tests Claude picked from his history of troubleshooting sessions. It speaks RESP2 and RESP3, shards the keyspace across threads and uses io_uring on Linux.

Result (as claimed)

57 points on Hacker News; he published a benchmark repo with Terraform and scripts so others can re-check the numbers.

Tools they used

Cost: Pricing depends on the tools you pick; check each official pricing page.

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, AWS. 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: Build a Redis-compatible database in Rust with Claude as your pair
What the original author did: A developer started KiviDB in February to learn Rust after hitting GC pauses and out-of-memory crashes with Dragonfly at work. He used AI a lot but made the design decisions himself, based on tests Claude picked from his history of troubleshooting sessions. It speaks RESP2 and RESP3, shards the keyspace across threads and uses io_uring on Linux.
Reported result (as claimed by the author): 57 points on Hacker News; he published a benchmark repo with Terraform and scripts so others can re-check the numbers.
Source: https://news.ycombinator.com/item?id=50152541
Tools they used: Claude, AWS
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.

The Daily 5

Get five new use cases tomorrow morning

Free. Real sources. Unsubscribe any time.

Guides for this use case

How to build AI agents for SEO and ads · How to add memory to coding agents · How to build agent memory and context layers · How to use AI agents for Linux, servers and homelabs

Related use cases

Dev & opsHacker News · ofrzeta

Let Claude design schematics and PCBs in KiCad

Konnect is a KiCad 10 plugin that lets Claude and other assistants design schematics and PCBs over MCP: 228 tools for schematic capture, layout, routing, ERC/DRC checks, JLCPCB part search and manufacturing exports, with skills that teach Claude KiCad conventions.

See pricing page1 hourAdvanced