See the fix before it lands.
Agent Etna writes the smallest patch that closes a failing test, runs it in a sandbox against the same suite, opens a real GitHub PR, cryptographically signed, and waits for your approval. One click rolls back any change that goes sideways in production.
What it does.
Fix is the bridge between a failing test and a verified change. When a Test run flags a regression — a hallucination, a leaked tool call, a broken refund flow — Agent Etna proposes the smallest possible patch, runs the full suite against the patched code in a sandbox, and only then asks you to approve. No drift between "what was tested" and "what shipped."
Sniper-style patches.
Agent Etna doesn't refactor. It scopes the fix to the failing test — minimum viable change, no surrounding cleanup, no opportunistic edits. Smaller diffs are easier to review, faster to revert, and 60–80% cheaper in tokens than a full rewrite. The constraint is the feature.
Sandbox preview, every time.
Every fix runs against the same test suite that flagged the regression — but in an isolated sandbox, before it touches your main branch. You see pass/fail per test on the patched version, the new diff, and the runtime behaviour side-by-side with the old one. If the fix doesn't pass, it never opens a PR.
Real GitHub PRs, signed.
Agent Etna opens a normal GitHub PR labelled agent-etna, ready for review. Every commit is cryptographically signed by your Agent Etna instance — anyone can verify the change came from Agent Etna and hasn't been tampered with after the fact. Useful in regulated environments, useful in any environment that takes provenance seriously.
One-click rollback.
Every fix is versioned. If something goes sideways after merge, one click reverts to the prior working commit — and the rollback itself is signed and logged. You always know what's running, when it changed, and how to get back.
Try a fix in the sandbox.
Free tier ships today. Connect a GitHub repo and walk through your first auto-fix — sandbox, signed PR, the whole flow.