Developer builds lightweight self-hosted observability tool for LLM agents

A developer frustrated with the opacity of small LLM agent runs built an open-source observability tool called Otterscope after finding existing solutions either too invasive or too complex. Otterscope is distributed as a single Go binary that stores data locally in SQLite and listens for OpenTelemetry traces, requiring no external databases or cloud services. The tool tracks costs against current provider pricing and keeps evaluations in the same database as traces for easy correlation. It currently operates as a single-user tool with no authentication, and can be run via Docker or self-hosted on a basic cloud server for around six dollars a month. The project is available on GitHub and is aimed at individual developers who want simple, private visibility into their agent behaviour.