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Briefcase AI

Quick Start

Install

Terminal window
pip install briefcase-ai

Capture a Decision

from briefcase import capture


@capture()
def summarize(text: str) -> str:
    # call your LLM here
    return llm.complete(text)


result = summarize("Quarterly earnings report...")

The @capture decorator records every call — inputs, outputs, model parameters, and timing — as a DecisionSnapshot.

Replay a Decision

from briefcase.replay import ReplayEngine


engine = ReplayEngine()
snapshot = engine.load("snapshot-id")
replayed = engine.replay(snapshot)

Check the Result

assert replayed.output == snapshot.output
print("Decision replayed successfully.")

That’s it. Every call to summarize is now recorded and replayable. Next, explore Installation for extras or Core Concepts to understand how snapshots work.