Arga is the infrastructure that lets you validate code changes & agents at scale, because you (and your users) were never meant to be QA for AI. We provide validation infrastructure with fully-functional mocks of external services for your code & agents. Deploy a PR into our production-like sandbox and it runs against replicas of any web app, fully compatible with any official API/SDK. These replicas surface edge cases traditional mocks or assertions miss, and you never hit rate limits. For AI agents, run red-teams with Arga: test tool calls, behaviours, and failure modes before anything reaches production.