Wfproc feature/hybrid artwork detection

CLAUDE.md

@@ -7,6 +7,8 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 - Scan the existing codebase and reuse existing functions wherever possible.
 - Keep all imports within functions unless they must be mocked in a test.
 - If an import is small, performative, and significantly reduces needs for new code, use the library.
+- Generally code should stay under 100 lines.
+- A code file should never exceed 200 lines.
 - Write short Sphinx docstrings as a single line description, a single line for each parameter, and no empty lines.
 - On first line of docstrings use \n instead of line break.
 - Variable names must be `snake_case` sequence of descriptive words <=5 letters long

negate/extract/__init__.py

@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: MPL-2.0 AND LicenseRef-Commons-Clause-License-Condition-1.0
+# <!-- // /*  d a r k s h a p e s */ -->
+
+"""Extract package for feature extraction modules.
+
+This package provides unified feature extraction with interchangeable analyzers.
+Users can select which modules to run and in what order.
+
+Modules:
+    - UnifiedExtractor: Main interface for selecting and running extractors
+    - ExtractorPipeline: Configurable pipeline for ordered extraction
+    - ArtworkExtract: 158 handcrafted features for artwork detection
+    - LearnedExtract: 768 ConvNeXt features for learned representation
+    - VAEExtract: VAE latent features with drift analysis
+    - VITExtract: Vision Transformer feature extraction
+    - Residual: Residual image feature computations
+
+Usage:
+    >>> from negate.extract import UnifiedExtractor, create_extractor
+    >>> from negate.io.spec import Spec
+    >>> spec = Spec()
+    >>> extractor = UnifiedExtractor(spec, enable=["artwork", "learned", "vae"])
+    >>> features = extractor(image)
+    >>> # or use factory function
+    >>> extractor = create_extractor(spec, ["artwork", "learned", "vit"])
+"""
+
+from negate.extract.feature_artwork import ArtworkExtract
+from negate.extract.feature_learned import LearnedExtract
+from negate.extract.feature_vae import VAEExtract
+from negate.extract.feature_vit import VITExtract
+from negate.extract.unified import UnifiedExtractor, ExtractorPipeline, create_extractor, create_pipeline
+
+__all__ = [
+    "ArtworkExtract",
+    "LearnedExtract",
+    "VAEExtract",
+    "VITExtract",
+    "UnifiedExtractor",
+    "ExtractorPipeline",
+    "create_extractor",
+    "create_pipeline",
+]