usecases.shShipping code, reviewing PRs, running infrastructure, fixing things at 3am. Most used named agents: Claude Code, Codex, Grok Bot.
Two Cockroach Labs engineers ran a pipeline of role-playing Claude agents on their MOLT migration tool; Db2 support landed in under two days for $4,172 of tokens, against nine months for Oracle in 2024.
Prime Intellect had its Prime Agent orchestrate about 2,000 sub-agents over two weeks to port itself from TypeScript to Rust, then a three-day hill-climb made startup about 13x faster and cut memory by over 80 percent.
Linus Torvalds used Claude Code to write a kernel patch series, its test programs and the first draft of the cover letter, then published the branch and measured a large speed-up on his own machine.
Three xAI Grok Bot engineers shipped a game, Thursday Arena, from an empty repo in a 72-hour livestream: an implementer-verifier bot pipeline landed 433 PRs and launch day saw about 4,000 games.
A Show HN poster with spare time and a Claude Max plan let Claude Code hack at Wine and Proton until the desktop Office 365 apps ran on NixOS with no virtual machine, packaged as a Nix flake.
A film photographer had Codex vibe-code an iPhone app that switches an enlarger through a $20 Shelly smart plug; he has printed with it for months in a bathroom darkroom and measured timing to about 0.1 seconds.
Lorenzo Massaro, CTO of Eternal Tech, says a simple Codex UX check launched from VS Code spawned 826 child tasks on a larger model over 20 days and billed roughly $78,000 to a company card before anyone noticed.
A Hacker News poster built vertumnus.fyi, a printable produce-seasonality poster generator, in one 731-prompt Claude Opus 5 session over 22 working days, and published the full transcript with a frank list of misses.
A founder told Opus 5.5 to reach feature parity with Figma and reports a working editor in about three hours and eight prompts, with roughly 8,200 lines of React for rendering, hit testing and undo.
After a retried job double-charged 37 customers, a developer used Claude Code to classify 140 Celery tasks by side effect, roll out idempotency keys and build a run-it-twice test that caught 14 more.
Alberto Arena had a local Claude Code write milestone briefs and review PRs while cloud sessions built his Laravel and NativePHP menu bar app test first; rules in AGENTS.md held, rules in briefs did not.
A solo developer running up to eight Claude Code sessions at once put one orchestrator session in charge of deploys and heavy jobs, and it shipped eight batches of others' work in a single deploy.
Hiroki Kondo had Claude Code script, record, caption and assemble a 20 to 30 second looping README GIF for karasu, his architecture diagram tool, all inside a devcontainer.
Alice Moore of Builder.io ran 16 GrokBot bots around her Claude Code and Codex threads for a week and merged 78 PRs, then quit after idle bots burned $100 over one weekend.
Amara Graham asked Codex and GitHub Copilot to each build a React proof of concept that views a PDF and extracts its fields; Codex got there after a few rounds, Copilot only once web access was switched on.
QA engineer Alicia Gonçalves runs Claude Code skills inside her Obsidian vault that pull a Jira ticket's context and Confluence references, write a test plan from her templates, and publish cases to Zephyr.
A developer writing as Info Inlet banned himself from typing application code for a month and shipped a small SaaS with auth, Stripe billing, a dashboard and a public API, logging nine points where the rule broke.
Earl Grey, a court operations manager who does not type code, had Kiro build and Claude review a throwaway deploy of a civic agenda watcher; the spike found five wrong assumptions and a redaction control that never ran.
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