Design mobile apps by chatting with AI
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AI agent use cases: Coding
Real coding projects people built with AI agents, with recipes.
Use cases
Turn screenshots into working front-end code
Screenshot to Code converts a screenshot, mockup, recording or prompt into HTML/Tailwind, React or Vue, then refines it from plain-English follow-ups.
Turn a text idea into an iOS and Android app
AppAlchemy turns a plain-text idea into app designs and a working mobile app without code.
Spend leftover Claude and Codex quota on small pull requests
A founder built a bot that turns spare subscription tokens into pull requests for small tasks he never gets around to.
Drive coding agents from Telegram and resume after usage limits
A developer built nightmux to control Claude Code agents from Telegram and auto-resume past usage limits overnight.
Run a fleet of coding agents like a teaching hospital
Two Cockroach Labs engineers turned GitHub issues into 'patients' handled by agent roles (triage nurse, fellow, reviewing attending, discharge nurse) and shipped production code for five months.
Decompile a classic shooter with a swarm of coding agents
Over three months, a developer and community helpers had up to 16 Claude Code and Codex agents rebuild an old first-person shooter as readable C++ that runs without noticeable bugs.
Let your agents draw arrows and boxes on your screen
A developer made a tool so coding agents can point at things on your screen with big arrows, boxes and text.
Make Claude’s replies half as long with a plugin
A developer annoyed by long, filler-heavy replies built a Claude Code plugin that cuts them.
Have Claude Code review your requirements against your roadmap
A developer found Claude Code more useful for reviewing requirements than writing them.
Find where a cheaper model would have done the job
A developer open-sourced AgentFare, which reads Claude Code, Codex CLI and Gemini CLI logs and shows where a cheaper model would have worked.
Cap spending before you let a coding agent spawn sub-agents
A developer reports that a simple UI review task in Codex spawned 826 child tasks and roughly $78,000 in usage without his approval.
Keep your Mac awake only while coding agents work
A developer made a free menu bar app that keeps a Mac awake, lid closed too, only while Claude Code, Codex, Cursor or Gemini CLI is working.
Make Rust libraries faster by looping agents against benchmarks
A data scientist got agents to write Rust ML and utility crates that beat established libraries on speed by giving them benchmark targets and strict anti-cheating rules.
Catch conflicting plans between parallel coding agents before they merge
A team running several coding agents on one repo built a tool to catch intent conflicts Git cannot see.
Notice you no longer understand your own app, and go back to coding by hand
A solo developer who added features at breakneck speed with Claude realized he no longer understood his app.
Agree on PR rules before a teammate sends a 5,000-line vibe-coded PR
A developer wrote about his business partner sending a 5,000-line vibe-coded PR he had not tested.
Sell one API for every LLM provider
LLM Gateway routes requests across 280+ models from 35+ providers with one key and real-time cost tracking.
Post a daily Sentry error digest to Slack with a Claude routine
A team runs a Claude routine with no internet except Slack and Sentry that compares errors to source code and posts a daily digest.
Debug user issues in minutes with Claude, observability and read-only DB access
A developer connects Claude to dash0, Linear and a read-only production database, and opened an MCP over their own GraphQL API.
Match 40 web pages pixel-perfect to Figma with Codex and the Figma MCP
Facing 40 pages to match to an inconsistent Figma file, a developer connected the Figma MCP to Codex, and it did the job.
Generate slide decks from a repo that warn when they drift from the code
A developer made a skill that turns a codebase into slides whose references carry line ranges and hashes.
Watch user sessions, find real bugs and open only verified fixes
A former Robinhood engineer built an open-source agent that investigates user-facing issues and opens a PR only when it can verify the fix.
Migrate 12-year-old .NET code to .NET 10 with Claude Code
A developer used Claude Code to move a 2014 TCP sockets project to .NET 10.
Port your Claude Code skills to Codex and compare
A Rails developer used Codex more than Claude Code for a week and had Codex convert his Claude skills.
Pause your music when Claude Code needs you
A developer made Spotify pause whenever Claude Code needs input and resume when you answer.
Let your coding agent drop read-only probes in production
A YC startup lets Cursor or Claude Code capture live variable values in prod without redeploying, to find root causes.
Run an authorized pentest agent on an old Android phone
A developer runs an autonomous penetration-testing agent on a OnePlus 8, with a local 1.2B model and a scope-enforcing proxy.
Share project memory across Codex, Claude Code, Cursor and Gemini CLI
A developer built Pathmark, a local memory store so coding agents stop starting cold; it had 1,612 npm downloads in a month.
Track token use and cost across 27 AI coding tools
A developer released TokenTracker, a local dashboard for usage and cost across Claude Code, Codex, Cursor, Gemini CLI, Copilot and more.
Ship a Windows desktop app from issue to store with the Copilot app
A developer built an Azure VM manager while testing GitHub’s Copilot app, which works from issue to merged PR, and published it free on the Microsoft Store.
Design product UI in code with Claude instead of Figma mockups
A Jane Street designer, once an AI skeptic, now does most design work with Claude Code instead of specs and Figma mockups.
Migrate a legacy auth system with Cursor in an afternoon
A developer used Cursor to move a legacy MD5 session login to JWT with refresh tokens, bcrypt and Google OAuth in about four hours.
The Daily 5.
Five real AI agent use cases each morning, each with a recipe and a source. Plus a Sunday roundup. Free.