identa-core 0.4.9b4

Core domain and application logic for Identa

Identa Core 🧠

The engine room of Identa. This package contains the pure domain logic, ports, and application handlers following a strict Hexagonal Architecture and CQRS pattern.

Architecture

Identa Core is designed to be framework-agnostic and side-effect free. It enforces a clean separation between "how we evaluate" and "how we store/trace".

Hexagonal Layers

1. Domain: Pure Pydantic models (Runs, Spans, AgentStructure) and core logic (Metric computation, Migration validation).
2. Ports: Abstract interfaces for storage and artifacts.
3. Application:
   • Commands: Mutation logic (Start Run, Log Results).
   • Queries: Data retrieval logic (List Runs, Get Comparison).
4. Persistence (Adapters): Concrete implementations of ports (SQLite, Local Filesystem).

Key Components

• Evaluation Engine: The loop that executes agents against test suites and computes metrics.
• Tracing Service: A context-aware span collector.
• Migration Engine: Logic to validate and apply model-binding swaps.
• Reproduction Engine: Logic to replay experiments with structural drift detection.

Drift Analysis Tracks

Identa Core supports two distinct evaluation pipelines:

1. Standard Track: Robust, statistical observability.

   • Normalized Structural Drift (Jaccard Similarity).
   • Behavioral Drift (Smoothed PSI).
   • Feature Weighting (MetricSpec.weight).

2. Vanguard Track: State-of-the-art semantic/causal detection.

   • Semantic Embedding Drift (Wasserstein Distance).
   • LLM-as-a-Judge (Qualitative Drift scoring).
   • Online Calibration (Dynamic Decision Boundaries).
   • Causal Graph Inference (Root-Cause Bottleneck analysis).

Configure your pipeline via EvaluationConfig.drift_mode.

Development

This package is managed by uv. ...

# Run unit tests
uv run pytest tests/