Cosine Swarm

Cosine Swarm just hit Rank #10 on Product Hunt with 128 upvotes — not bad for aYC23 batch company that's been pretty low-key until now. The pitch is straightforward: assign it a ticket, it plans, writes, and opens a PR, all without you babysitting it, and the Swarm mode drops multiple parallel agents onto the same codebase for things like complex refactors or system-wide migrations that would otherwise eat your entire sprint. It's free to start with their Hobby Plan, and the whole thing runs as one runtime across CLI, desktop, and cloud, which means you're not juggling three different interfaces just to make it actually work. The "built by devs for devs" energy is everywhere in the details — isolated PRs, asynchronous ticket assignment, real reviewers not getting locked out — but the real test is whether it handles messy legacy codebases as cleanly as the demos suggest, and I haven't seen enough of that yet to call it a day.