Charlie is a fully autonomous TypeScript engineer

"We've tried out several tools, but once the team really leaned into using Charlie as a counterpart for each step of our stack (Slack → Github → Deployed) in our Typescript repo, we saw meaningful gains in engineering throughput and significantly better results compared to other AI tools... and Charlie is only getting better and better.

The team is still ramping up on Charlie, but each engineer can already manage about 5 PRs simultaneously and even submit PRs while attending meetings! Charlie has been a huge addition to our team."

"We use Charlie for around 85% of our PRs. His ability to deliver features end to end is significantly better than other agentic coding tools we’ve tried and he’s often able to identify and handle edge cases without being prompted. We’ve added instructions for him to write tests and Storybook stories for the features he builds which helps keep our test coverage high and allows us to visualize UI changes without needing to pull and test his changes locally.

That’s to be expected from a solid agentic SWE. However, Charlie shines even more by being connected to our Github, Slack, and Linear projects. That gives him context across the SDLC, unlocking non-coding use cases you might assign to a developer or PM, or skip over entirely for lack of resourcing. He can give your CEO a summary of the day’s feature work. He can write up a QA checklist as a Linear ticket. You can complain about a bug to him in DMs and have a PR ready to ship in minutes. You can have him rebase, merge, or send you a preview UI link for a PR in Slack and iterate with him when you aren’t able to reach a laptop. It’s really remarkable what’s unlocked by an agent like Charlie having this type of connectivity."

"Third Person has been fully leveraging AI-native development since Day 0.

We've tried every tool and agent we can get our hands on. None is as versatile and consistent as Charlie, and the rate of improvement is incredibly impressive. Charlie already does more research, reviews more PRs, and ships more code than any other team member."

"For a major refactor of ChatSiva, Charlie proposed a hexagonal/ports-based architecture, wrote ~90% of the code, and passed tests.

We compared PRs from GPT-5 and Claude—we merged Charlie's. As a Typescript agent, Charlie is opinionated and production-minded.

Charlie is now our go to expert for architecting solid code and solving hard tech problems."

"Charlie has been incredible for shipping PR's on the go.

Since I can use my phone and Slack to queue up Charlie to solve PR's I easily knock out 2-3 PR's on a commute or when I'm at the gym.

It's been incredible for someone building a fitness app since I can hammer my app with bug testing between sets, open PR's, and merge them when I get home. The code quality is much higher than other agents I've tried as well."