A TypeScript ecosystem for building AI applications with unified LLM interfaces, terminal UIs, and practical tools.
TypeScript library for building AI applications with multiple LLM providers. Unified interface, manual tool handling, and conversation management across Anthropic Claude, OpenAI, and Google Gemini.
Key Features:
- Multi-provider support (Anthropic, OpenAI, Google)
- Manual tool execution with interception capabilities
- Context serialization and conversation management
- Streaming with thinking/reasoning support
- Type-safe tool definitions with Zod schemas
Terminal UI framework with differential rendering for building interactive CLI applications.
Key Features:
- Differential rendering for performance
- Text editing, autocomplete, and selection components
- Markdown rendering and syntax highlighting
- Composable component architecture
Use OpenAI, Google, and other LLM providers with Claude Code by intercepting and transforming API requests.
Interactive chat application demonstrating lemmy and lemmy-tui integration. Work in progress.
Red teaming example. See BlueSky Thread
Screenshot capture MCP server.
Trace and analyze Claude Code conversations with rich visualization. See Twitter Thread, Simon Willison Blog Post
Setup:
git clone https://github.com/mariozechner/lemmy
cd lemmy && npm install
npm run dev # Starts compilation in watch mode for all packagesCommands:
npm run build # Build all packages and apps
npm run clean # Clean all dist folders
npm run typecheck # Type check all projects
npm run test # Run all testsSee README.md of respective package or app you want to hack on for more infos.
Monorepo Structure:
- Dependencies build in correct order (packages before apps)
- Unified scripts run across all workspaces
- TypeScript project references for incremental compilation