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Haystack

Know every change is good before you ship it

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Haystack is a testing environment for coding agents that runs changes against copies of production rather than a single clean test database. It identifies the screens, APIs and database writes a change can reach, then gives the agent parallel environments seeded with realistic customer accounts, settings and data. The agent can report what it changed and what it is concerned about, and see failures while it is still working, on pull requests, mid-task or before a release.

The platform runs each case in its own fork of a production snapshot, keeping writes, deletes and outbound calls isolated from real systems. Environments are created and torn down automatically, with cases run in parallel and results returned in minutes. It is available as a CLI and agent loop, with a Team plan covering one product team and unlimited verified changes, and an Enterprise edition for multiple teams, custom infrastructure, SSO, audit logging and annual invoiced contracts.

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