Your coding agent writes code.
Arcanist ships software you can trust.
Arcanist opens PRs, tests them end-to-end in your environment, fixes failures, and delivers work engineers actually trust enough to merge.
/payments...stripe_handler.py:142. Opening PR now.Submit in Slack.
Get verified PRs.
Describe what you need in plain English, right where your team already works, and Arcanist takes it from there in the background. It reads your codebase, writes the change, runs your tests end-to-end, fixes failures, and opens a PR ready for review, pulling your CI config, test patterns, and conventions straight from the repo on every session.
Connect
Link GitHub, Slack, Linear, Sentry, and Datadog; CI configuration comes straight from your repo.
Describe
Tag @arcanist in any Slack channel and describe what you need done in plain English; no templates required.
Verify
Arcanist runs the change end-to-end, reads failures, and pushes fixes until the PR is ready to merge.
Verification with the receipts.
Arcanist doesn't just claim the change works; it shows you. Every PR ships with the work behind it: passing test runs, runtime screenshots from your UI, the failures Arcanist fixed, and a tight summary of what changed. You review work that already passed the same checks your team trusts, with the artifacts to prove it.
Launch more work without creating more review debt.
Stop context-switching between two or three threads, and submit as many tasks as you want; each one runs in its own isolated cloud environment, verifies before handoff, and comes back as work you can trust instead of work you have to check again.
Every team stops waiting on engineering.
Once Arcanist understands your company, it's not just engineers who benefit. CX asks about a customer bug in Slack and gets the full story (code, logs, recent changes, related incidents) in minutes instead of days.
- Revert the retry change for their endpoint
- Increase their timeout configuration
- Add a fast-path for webhooks under 5s
Here's what your first 30 days look like.
Get started.
Get comfortable.
Ask why you didn't switch sooner.
Before you ask.
How is this different from other coding agents?
Most coding agents write code and leave verification to the engineer. Arcanist runs the change end-to-end in your environment, fixes failures, and reads your CI pipeline, naming conventions, and test patterns straight from the repo.
Is this safe for production codebases?
Every task runs in an isolated sandbox with a strict network allowlist, and the agent can't read or commit your .env files, credentials, or CI workflows. PRs land on feature branches with no auto-merge and no path around your branch protection, so you review and merge the same way you would from any engineer.
How does Arcanist learn our environment?
Each session reads your codebase, CI configuration, test patterns, and commit history. Within a session, Arcanist learns from test failures, fixes the issue, and pushes the update. To carry conventions forward, drop guidance into .arcanist/memory/ in your repo, and Arcanist reads it on every future session.
What if the agent gets something wrong?
Arcanist verifies before handoff: it runs tests end-to-end, reads CI and runtime failures, fixes the issue, and pushes the update. Every PR ships with the evidence (test runs, runtime screenshots, failure logs), so you're reviewing work that already passed the same checks your team trusts.
Can Arcanist run inside our VPC?
Today Arcanist runs in our cloud, with all customer code processed in the US. Restricted mode caps the agent's reach per business with read-only access by default, no sandbox persistence between sessions, custom egress allowlists, and bring-your-own-key model routing. Self-hosted sandboxes are supported for businesses that want to run them in their own AWS account, with on-prem control plane on the roadmap.
What does our security team get?
Every task runs in its own isolated sandbox with nothing persisting between sessions, and the agent can only reach the destinations you've approved. Your code is never used to train models; inference goes through providers configured for zero data retention, with a BAA in place where applicable. On our side, Arcanist staff have no standing access to your code or sandboxes; access is break-glass only, with audit logs and post-incident notification. Your data is yours to delete, with full removal within seven days of request, and SOC 2 Type II is in progress.
Stop babysitting agent code.
See what verified, merge-ready work actually looks like.
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