Behavioral Testing Python Packages

agentdelta

Diff and regression-detect LLM agent execution traces

gauntlet-cli

Behavioral reliability under pressure. Test how LLMs behave when things get hard.

agentassert-abc

Formal behavioral specification and runtime enforcement for autonomous AI agents. Agent Behavioral Contracts (ABC).

modeldiffx

Model behavioral diffing - compare LLM outputs across versions, detect regressions.

specterqa

AI persona-based behavioral testing for web apps. No test scripts. YAML-configured. Vision-powered.

trajex

The open format for AI agent execution traces — assert what your agent DID, not just what it said

ghostqa

AI persona-based behavioral testing for web apps. No test scripts. YAML-configured. Vision-powered.