vauban 0.2.1

LLM red-teaming and adversarial testing framework

vauban

MLX-native abliteration toolkit for Apple Silicon. Measure a refusal direction, cut it from the weights, get a modified model out. ~550 lines of Python.

Install

git clone https://github.com/teilomillet/vauban.git
cd vauban && uv sync

Usage

Write a TOML config:

[model]
path = "mlx-community/Llama-3.2-3B-Instruct-4bit"

[data]
harmful = "default"
harmless = "default"

Run it:

uv run vauban run.toml

Output lands in output/ — a complete model directory loadable by mlx_lm.load().

What it does

1. Measure — runs harmful/harmless prompts, captures per-layer activations, extracts the refusal direction via difference-in-means (or top-k SVD subspace)
2. Cut — removes the direction from o_proj and down_proj weights via rank-1 projection. Variants: norm-preserving, biprojected, subspace
3. Export — writes modified weights + tokenizer as a loadable model
4. Evaluate — refusal rate, perplexity, KL divergence between original and modified
5. Probe/Steer — inspect per-layer projections, steer generation at runtime
6. Surface map — scan diverse prompts to visualize the refusal landscape before/after

Python API

import mlx_lm
from vauban import measure, cut, export_model, load_prompts, default_prompt_paths
from mlx.utils import tree_flatten

model, tok = mlx_lm.load("mlx-community/Llama-3.2-3B-Instruct-4bit")
harmful = load_prompts(default_prompt_paths()[0])
harmless = load_prompts(default_prompt_paths()[1])

result = measure(model, tok, harmful, harmless)
weights = dict(tree_flatten(model.parameters()))
modified = cut(weights, result.direction, list(range(len(model.model.layers))))

export_model("mlx-community/Llama-3.2-3B-Instruct-4bit", modified, "output")

Config reference

See docs/getting-started.md for the full config reference with all [measure], [cut], [surface], [eval], and [output] options.

Requirements

• Apple Silicon Mac (M1+)
• Python >= 3.12
• uv

License

Apache-2.0