Connect

If you already score your agent with another tool, Trace can tell you whether the difference between two versions is real. poisson-trace-import reads the result files that tool wrote, one import per version, and poisson-trace fix-check compares them.

poisson-trace-import deepeval old.json --store ./store --run old \
    --metric "Tests Passed" --cut recorded --case name
poisson-trace-import deepeval new.json --store ./store --run new \
    --metric "Tests Passed" --cut recorded --case name
poisson-trace fix-check old new --store ./store --event missed --inputs all --max-mde 0.05

You name the metric, the cut and what identifies a case. Nothing has a default. The importer runs no metric and calls no model.

Models

Model	Connects through
Claude	Tasks’ anthropic provider, with your own Anthropic key

Evaluation tools

Tool	Reads
DeepEval	DeepEval’s saved test runs, one metric per import
Ragas	The score table saved from Ragas, one score column per import
LangSmith	Not yet built

Agent frameworks

Framework
OpenAI Agents SDK	Not yet built

Compute

Prove runs on your machine by default. For a large sweep it runs on a cluster in your own AWS, GCP or Azure account, set up with your team during onboarding, or on Modal (poisson-prove sweep --backend modal).