Tag: langgraph

All the articles with the tag "langgraph".

• Credential Sentinel: An Agent That Reads Widely and Acts Narrowly

  Updated: 2 Jul, 2026

  How I built Credential Sentinel, a LangGraph AI agent that finds the credentials nobody is rotating and walks them to a safe, human-approved rotation. A look under the hood at the resumable state machine, the real TLS handshake, delayed-revoke cutovers, automatic rollback, and a cross-run memory.

• Building the Agent Was the Easy Half. The Evaluation Wasn't.

  30 Jun, 2026

  How I evaluated my own AI agent: a 50-case golden dataset scored with code and an LLM-as-judge in LangSmith, plus the security regression I caught. The story of taking Credential Sentinel from a 0.976 composite score to a clean 1.0.