xrtm-eval 0.2.2

The Judge/Scoring engine for XRTM.

xrtm-eval

The Judge for XRTM.

xrtm-eval is the rigorous scoring engine used to grade probabilistic forecasts. It operates independently of the inference engine to ensure objective evaluation.

Part of the XRTM Ecosystem

Layer 4: xrtm-train    → (imports all)
Layer 3: xrtm-forecast → (imports eval, data)
Layer 2: xrtm-eval     → (imports data) ← YOU ARE HERE
Layer 1: xrtm-data     → (zero dependencies)

xrtm-eval provides scoring metrics AND trust primitives used by the forecast engine.

Installation

pip install xrtm-eval

Core Primitives

1. Brier Score Breakdown

We do not use simple accuracy. We use the Brier Score, decomposed into its three component terms:

• Reliability: How well do the predicted probabilities match observed frequencies?
• Resolution: How well does the forecast distinguish between events that happen and those that don't?
• Uncertainty: The inherent difficulty of the problem.

from xrtm.eval import BrierScoreEvaluator

evaluator = BrierScoreEvaluator()
score = evaluator.score(prediction=0.7, ground_truth=1)
# score = (0.7 - 1.0)^2 = 0.09

2. Expected Calibration Error (ECE)

Use the ExpectedCalibrationErrorEvaluator to measure the gap between confidence and accuracy across bin buckets.

3. Epistemic Trust Primitives (v0.1.1+)

xrtm-eval now includes trust scoring infrastructure:

from xrtm.eval.core.epistemics import IntegrityGuardian, SourceTrustRegistry

registry = SourceTrustRegistry()
guardian = IntegrityGuardian(registry)

Project Structure

src/xrtm/eval/
├── core/            # Interfaces & Schemas
│   ├── eval/            # Evaluator protocol, EvaluationResult
│   ├── epistemics.py    # Trust primitives (SourceTrustRegistry)
│   └── schemas/         # ForecastResolution
├── kit/             # Composable evaluator implementations
│   └── eval/metrics.py  # BrierScoreEvaluator, ECE
└── providers/       # External evaluation services (future)

Development

Prerequisites:

• uv

# Install dependencies
uv sync

# Run tests
uv run pytest