July 10, 2026 · Daniil Pokrovsky

DevIntern is Fair Source

DevIntern’s source code is public now. The full repo is on GitHub, under the Functional Source License, the license at the center of the Fair Source movement.

Until last week it was closed. Here is what changed and why.

DevIntern is a pair of tools that turn tracker tickets into reviewed pull requests while nobody is watching. It works the backlog in whatever tracker your team already uses (Jira, Linear, Trello, Asana, Azure DevOps, GitHub Issues, or plain markdown files) and drives whichever coding agent you prefer, whether that’s Claude Code, Codex, Cursor, OpenCode, or one of the other supported agents, on your own model keys. Tickets get checked for feasibility, implemented, self-reviewed, and opened as PRs your team reviews as usual.

A tool like that asks for real access: a tracker token and push rights to your repos. Whether you’re a developer trying it on a side project or an organization putting it in the delivery pipeline, you should be able to verify what it does with that access instead of taking a vendor’s word for it. Now you can. Read the code, audit it, self-host it if that’s how you operate. That trust question, more than anything, is why we opened the source.

The switch also let us simplify pricing to one line: interactive use is free forever, no signup, no time limit, every tracker and every agent included. You pay when it runs unattended: scheduled ticket pickup, reviewer comments handled as commits on the same branch, all on your own infrastructure.

We picked FSL deliberately. You get the source and the freedom to study it and run it yourself; the license keeps competitors from reselling the work as their own service. That combination is what makes the model sustainable: revenue from unattended automation funds a full-time pace on the roadmap, and there is a lot on it.

The trust runs both ways, by the way. There’s no DRM, no telemetry, no phone-home enforcement in the code. A plain license and a simple check, because teams that build on a tool deal in good faith, and we’d rather build for those teams than lock down the product against everyone else.

FSL also answers the vendor-risk question orgs actually ask. Every release converts to Apache 2.0 two years after it ships. If DevIntern ever stops being developed, the code is yours under a permissive license. The worst case is that it stops improving, not that it stops working. Very few products can offer that.

If your backlog is deeper than your review queue, give it a run. And if you’re choosing a license for your own dev tool, look at FSL. It deserves to be better known.