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# CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
## Build and Development Commands
```bash
# Build the project
cd sorsyl && dune build
# Run tests
cd sorsyl && dune test
# Clean build artifacts
cd sorsyl && dune clean
# Install dependencies (if needed)
opam install --deps-only .
```
## Project Architecture
Sorsyl is an OCaml library for phonological analysis, specifically focused on sonority calculation for IPA (International Phonetic Alphabet) segments.
### Core Components
- **lib/sonority.ml**: Main sonority calculation logic using a decision tree based on phonological features (scale 1-9: voiceless stops to low vowels)
- **lib/feature.ml**: Phonological feature definitions and segment representation
- **lib/ipa_table.ml**: CSV data loading and IPA segment lookup functionality
### Data Files
The `data/` directory contains:
- `ipa_all.csv`: Main IPA character database with phonological features
- Various YAML configuration files for linguistic data (ASJP, diacritic definitions, etc.)
### Decision Tree Sonority Scale
The sonority calculation uses phonological features to classify segments:
- 9: Low vowels (most sonorous)
- 8: High vowels
- 7: Glides/approximants
- 6: Liquids
- 5: Nasals
- 4: Voiced fricatives
- 3: Voiceless fricatives
- 2: Voiced stops
- 1: Voiceless stops (least sonorous)
### Development Environment
Uses devenv.nix for development environment setup with OCaml toolchain and dependencies (csv, base, stdio libraries).
The main executable (bin/main.ml) is currently incomplete - contains only a failwith placeholder.
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