Every developer has lost five minutes to a port-in-use error at startup. Here is the stream rule that detects EADDRINUSE in your logs, kills the blocking port, and restarts your service — automatically, without a terminal.
Crashes make noise. Silent failures do not. Here is how to catch the worst kind of outage — the service that just quietly stops — before your users do.
Agata Stack runs a local HTTP server on port 19877. Tail live logs over SSE, manage services, and hit a self-describing OpenAPI spec — all from a shell script, a CI job, or an AI tool.
One error line repeating 400 times looks like noise. But it is a pattern — and the right rule can catch it in the first 5 lines, fire once, and stay quiet after that. Here is how log fingerprinting works in Agata Stack.