Hi HN! We’re a team of ML validation specialists and we’ve been building /Spec27, a tool for testing whether AI agents still do their job safely and reliably as models, prompts, tools, and surrounding systems change.We started working on this because a lot of current LLM evaluation work seems aimed at scoring general model behavior, while many teams are deploying systems that have a specific mission to fulfill. Many of the tools also assume you have full access to the agent stack and traces so you can place SDKs and Gateways, but a lot of agents are being created on vendor platforms where this isn’t possible.As a result, we approaches it from the outside in: all tests just run to the primary interfaces of an Agent and don’t assume anything about internals. The other important things about the approach is spec-driven. Instead of treating testing as a one-off benchmark or static eval set, we let teams define reusable specifications for the behavior they want from an agent, then generate ...