puaros/CLAUDE.md

CLAUDE.md

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

Project Overview

Puaros is a TypeScript monorepo using pnpm workspaces. Currently contains the @puaros/core package for core business logic. The project uses Node.js 22.18.0 (see .nvmrc).

Essential Commands

Build & Development

# Build all packages
pnpm build:all

# Clean all builds
pnpm clean:all

# Build specific package
cd packages/core && pnpm build

# Watch mode for specific package
cd packages/core && pnpm watch

Testing

# Run all tests across packages
pnpm test

# Core package testing options
cd packages/core
pnpm test              # Run tests in watch mode
pnpm test:run          # Run tests once
pnpm test:coverage     # Generate coverage report (80% threshold)
pnpm test:ui           # Open Vitest UI
pnpm test:watch        # Explicit watch mode

Tests use Vitest with coverage thresholds set to 80% for lines, functions, branches, and statements.

Linting & Formatting

# Format all TypeScript files
pnpm format

# Lint and auto-fix all TypeScript files
pnpm lint

# Check linting without fixing
pnpm eslint "packages/**/*.ts"

Code Style Requirements

Critical: This project uses 4-space indentation, not 2 spaces.

Key Configuration

• Indentation: 4 spaces (enforced by Prettier)
• Line Length: 100 characters max
• Quotes: Single quotes
• Semicolons: Always required
• Trailing Commas: Always in multiline
• TypeScript: Strict type checking with nodenext modules

TypeScript Rules to Follow

From eslint.config.mjs and detailed in LINTING.md:

1. Type Safety (warnings, must address):

   • Avoid any type - use proper typing
   • Declare explicit function return types
   • No floating promises (always await or handle)
   • No unsafe type operations

2. Code Quality (errors, must fix):

   • Use const for non-reassigned variables
   • Always use === instead of ==
   • Always use curly braces for conditionals/loops
   • Handle all promises (no floating promises)
   • No console.log (use console.warn/console.error or proper logger)

3. Complexity Limits (warnings):

   • Max cyclomatic complexity: 15
   • Max function parameters: 5
   • Max lines per function: 100
   • Max nesting depth: 4

Git Commit Format

Follow Conventional Commits format. See .gitmessage for full rules.

Format: <type>: <subject> (imperative mood, no caps, max 50 chars)

IMPORTANT: Do NOT add "Generated with Claude Code" footer or "Co-Authored-By: Claude" to commit messages. Commits should only follow the Conventional Commits format without any additional attribution.

Monorepo Structure

puaros/
├── packages/
│   └── core/              # @puaros/core - Core business logic
│       ├── src/           # Source files
│       ├── dist/          # Build output
│       └── package.json   # Uses Vitest for testing
├── pnpm-workspace.yaml    # Workspace configuration
└── tsconfig.base.json     # Shared TypeScript config

TypeScript Configuration

Base configuration (tsconfig.base.json) uses:

• Module: nodenext with nodenext resolution
• Target: ES2023
• Strict null checks enabled
• Decorators enabled (experimental)
• JSX configured for React

Core package (packages/core/tsconfig.json) overrides:

• Module: CommonJS (not nodenext)
• Module Resolution: node (not nodenext)
• Output to dist/ from src/

Important: The core package uses CommonJS output despite base config using nodenext.

Adding New Packages

1. Create packages/new-package/ directory
2. Add package.json with name @puaros/new-package
3. Create tsconfig.json extending ../../tsconfig.base.json
4. Package auto-discovered via pnpm-workspace.yaml glob pattern

Dependencies

Core package uses:

• simple-git - Git operations
• tree-sitter-* - Code parsing (JavaScript/TypeScript)
• uuid - UUID generation

Development tools:

• Vitest for testing (replaces Jest)
• ESLint with TypeScript strict rules
• Prettier for formatting

Important Notes

• Always run pnpm format before committing to ensure 4-space indentation
• Fix ESLint warnings incrementally - they indicate real type safety issues
• Coverage is enforced - maintain 80% coverage for all metrics when running pnpm test:coverage