awesome-quant/CLAUDE.md

# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Project Overview

**awesome-quant** is a curated list of quantitative finance libraries, packages, and resources. The primary content lives in `README.md` — a large markdown file **organized by category** (Numerical Libraries, Trading & Backtesting, Market Data, etc.) with inline language tags that identify which programming languages each project supports.

A companion website is generated from this data and deployed to GitHub Pages.

## Architecture

The pipeline works as follows:

1. **`README.md`** — The source of truth. All library entries follow the format: `- [name](url) - \`Language\` - Description.`
   - Entries are grouped under category headings (`##`), not language headings
   - Language is identified via inline backtick tags (e.g., `` `Python` ``, `` `Rust` ``) in the description
   - Multi-language projects have multiple tags (e.g., `` `Python` `Rust` ``)

2. **`parse.py`** — Parses `README.md`, extracts language from backtick tags, fetches last commit dates and stars via the GitHub API (using `PyGithub` with multithreading), and writes `site/projects.csv` with a `languages` column (comma-separated).

3. **`site/generate.py`** — Reads `projects.csv` (or parses `README.md` directly) and generates a static HTML site with search, filtering by language/category/source, sorting, and dark mode.

4. **CI** (`.github/workflows/build.yml`) — Runs daily and on push to `main`: runs `parse.py`, runs `site/generate.py`, and deploys to GitHub Pages via `gh-pages` branch.

Supporting scripts:
- `cranscrape.py` — Scrapes CRAN package pages to find associated GitHub repos; writes `cran.csv`.
- `topic.py` — Searches GitHub for repos tagged with a topic (e.g., "quant") above a star threshold.

## Commands

```bash
# Install dependencies (uses uv, requires Python 3.11+)
uv sync --no-install-project

# Run the parser (requires GITHUB_ACCESS_TOKEN env var)
GITHUB_ACCESS_TOKEN=<token> uv run python parse.py

# Generate the static site
uv run python site/generate.py
```

## Contributing Entries

See `CONTRIBUTING.md` for full guidelines. All entries must include language tags:

```
- [Project Name](https://github.com/owner/repo) - `Python` - Description ending with a period.
- [Project Name](https://github.com/owner/repo) - `Python` `Rust` - Multi-language project description.
- [Project Name](https://site.com) - `Python` - Description ending with a period. [GitHub](https://github.com/owner/repo)
- [Package Name](https://cran.r-project.org/package=pkg) - `R` - Description ending with a period.
- [package-name](https://pypi.org/project/pkg/) - `Python` - Description ending with a period.
```

CRAN and PyPI entries may optionally append `[GitHub](url)` after the description.

Entries are grouped under category headings (`##`), not language headings. Language is identified via inline backtick tags. Commercial/proprietary projects go under `## Commercial & Proprietary Services`.

`parse.py` and `site/generate.py` rely on this regex to extract entries: `^\s*- \[(.*)\]\((.*)\) - (.*)$`

The description text (group 3) may start with language tags in the format `` `Language1` `Language2` - `` followed by the actual description.