Drift Detection

Install

pip install briefcase-ai[drift]

Quick Example

from briefcase.drift import DriftDetector

detector = DriftDetector()
metrics = detector.compare("snapshot-a", "snapshot-b")
print(metrics.similarity_score)
print(metrics.cost_estimate)

Key Classes

• DriftDetector — compares decision outputs across snapshots
• DriftMetrics — similarity scores, diff details
• CostEstimate — token cost comparison

Configuration

Option	Default	Description
similarity_threshold	0.95	Minimum acceptable similarity
compare_tokens	True	Include token-level comparison