eigenhelm 0.4.0

Software Poet Conscience — language-agnostic code aesthetic evaluation

eigenhelm

A conscience for agents, not an agent — language-agnostic code aesthetic evaluation sidecar.

Eigenhelm scores agent-generated code against mathematical aesthetic metrics derived from information theory, complexity science, and a PCA eigenspace trained on curated elite corpora. It runs alongside code-generating agents as a real-time quality signal.

---

Quick Start

Install

uv tool install eigenhelm

For the HTTP server:

uv tool install "eigenhelm[serve]"

Evaluate a file

eh evaluate path/to/file.py --model models/demo-python-v0.npz

Run the scoring server

eh serve --model models/demo-python-v0.npz --host 0.0.0.0 --port 8080

API example

curl -X POST http://localhost:8080/evaluate \
  -H "Content-Type: application/json" \
  -d '{"source": "def add(a, b):\n    return a + b\n", "language": "python"}'

---

CLI Reference

All commands are available as eigenhelm <command> or eh <command>:

Command	Description
eh evaluate	Evaluate source files against an eigenspace model
eh train	Train a new eigenspace model from a corpus directory
eh inspect	Inspect a saved model's metadata
eh serve	Run the evaluation HTTP server
eh harness	Run a statistical comparison harness across two code sets
eh corpus	Manage training corpora (sync from manifest)

Run eh --help or eh <command> --help for details.

---

HTTP API

Endpoint	Method	Description
/health	GET	Liveness probe
/evaluate	POST	Evaluate a code unit
/evaluate/batch	POST	Evaluate multiple code units

---

Supported Languages

Language	Extension
Python	.py
JavaScript	.js
TypeScript	.ts
Go	.go
Rust	.rs
Java	.java
C	.c
C++	.cpp
Ruby	.rb
Swift	.swift

---

Models

The bundled models/demo-python-v0.npz is a small demo model so you can run the full pipeline without a hosted account. Production-grade models trained on curated elite corpora are available via the hosted service or as a paid download.

---

Development Setup

git clone https://github.com/metacogdev/eigenhelm.git
cd eigenhelm

# Install with dev and serve dependencies
uv sync --extra dev --extra serve

# Run tests
uv run pytest

# Lint
uv run ruff check .

---

Architecture

eigenhelm/
├── virtue_extractor.py   — Tree-sitter + Lizard → FeatureVector (69 dimensions)
├── critic/               — AestheticCritic: Birkhoff, entropy, compression metrics
├── eigenspace.py         — EigenspaceModel: PCA projection, drift scoring
├── training/             — train_eigenspace(), save_model(), inspect_model()
├── helm.py               — DynamicHelm: PID-controlled inference steering
└── serve.py              — FastAPI HTTP evaluation server

---

Current Status

• 5-dim scoring: manifold drift, alignment, entropy, compression, NCD exemplar distance
• 5 languages: Python, JavaScript, TypeScript, Go, Rust — all discriminating (Cohen's d > 0.5)
• Human correlation: Spearman rho = 0.56 (p < 0.0001, n = 52)
• Calibrated thresholds: Models store empirical score distribution; accept/reject boundaries derived from training corpus percentiles (p25/p75)

---

License

eigenhelm is licensed under the GNU Affero General Public License v3.0.

Commercial Licensing

Looking to use eigenhelm in a proprietary SaaS or enterprise product without AGPL-3.0 obligations? A commercial license is available.

Contact us at [e-mail] to discuss terms.