LangGraph Implementation Validator

Prevents the #1 cause of LangGraph failures: graphs that look correct but fail at runtime due to state mismatches, missing edges, or integration incompatibilities.

Core Failure This Skill Prevents

Developer: Graph runs but agent output is empty
Debug: 3 hours later... state key was "messages" in node A, "message" in node B

Developer: Graph hangs indefinitely  
Debug: Conditional edge returns "continue" but no edge defined for that route

This skill catches these issues before runtime.

The Five Validation Protocols