Agents with code
Open-source agents that did a real job. Every repo here belongs to a case: the builder's own project, with the result in their words and a prompt to try it.
We haven't audited this code. Read it before you run it. Repo facts as of Oct 21, 2026.
- CUkentcdodds/kentcdodds.com ↗Cursor moved a 42k-line site from Remix to React Router
Result Merging agent PRs is "starting to feel routine"
- CLGHJJ123/brainrotguard ↗Their kid asks for a YouTube video; the parent approves it from Telegram
Result Free and open source for other families
- CAThinkOffApp/CarWatch ↗A Raspberry Pi car assistant answers by voice, no internet needed
Result Dashboard command closed a real open car window
- CObschoepke/ableton-live-mcp ↗Nap-trapped by a baby, they got Codex to build a song in Ableton
Result Also had Codex compose a piano duet debating AI's merits
- CUmaddiedreese/ticket-printer-os ↗A receipt printer anyone can message: 700+ notes from around the world
Result Mostly incredibly kind messages
- CCbrumar/chess-postmortem-skills ↗Played thinking aloud, then Claude checked each thought with Stockfish
Result Answered the exact question asked aloud at move eight
- CLbri3d/mcd-diag-rs ↗A homemade VW diagnostic tool means brake pads without a Windows laptop
Result Ditched a ton of cloud services too
- CLConAcademy/WeaselToonCadova ↗Claude helped design the upgrade to a homemade pontoon boat
Result Later modelled in code with Claude in the loop
- CLBackSlasher/flying-toasters-reverse-engineered ↗Claude rebuilt a 1996 toaster screensaver, with pushback
Result Released as AGPL on GitHub
- CHVatroslav/spotify-auto-skipper ↗Spotify skips the songs they've just heard, built without writing code
Result Starts with Windows, never switched off
- CLgreggman/g-cap ↗Claude built a native Mac audio capture app in 4 minutes
Result Also built a Japanese dictionary site in under 2 hours
- GEgregryork/EpicRpgBattleMap ↗Big tools got in the way, so Gemini built a bare-bones D&D map in an hour
Result Published as a free web page
- CAjagberg/Me.OpenClaw ↗A homemade agent turns vet charges into ready-to-send insurance claims
Result Its own invoice-request emails once false-matched 12 claims
- CUSneakus/wcpredict ↗A live World Cup prediction map, shipped in a week with Cursor and Claude
Result Seeded with 4,200 predictions across 183 nations
- CHwelcomebrand/Spotify-Lesser-Lights ↗A Spotify playlist of the deep cuts from their top 100 artists
Result 1 or 2 deep cuts per artist
- CLepiccoleman/magenta-realtime ↗Google's AI jams, and now a live chord readout lets them play along
Result Also built Tuber, a video summary tool