nilcode

Inspired by Claude Code and OpenAI Codex, we built a multi-agent system that allows you to code, interact with Hedera via A2A and Agent Kit + query with the ETH blockchain via Blockscout Agent using MCP tooling. We have several agents we coordinated to make it work:

• A2A client
• Coder
• Error recovery
• Onchain detective
• Orchestrator
• Planner
• Preplanner
• Software architect
• Tester

• External A2A agent with the Hedera Manager (using the Hedera agent SDK).

nilcode uses a multi-agent architecture built with LangChain and LangGraph for orchestration and state management. It connects to multiple LLMs via OpenRouter’s API and supports OpenAI-compatible endpoints for flexibility.

The Agent-to-Agent (A2A) protocol enables collaboration with external AI services. Each agent has tools for file handling, code validation, terminal execution, and git integration.

Code integrity is enforced through AST-based syntax validation and intelligent error recovery. A key feature is the Project Manifest System, which ensures all agents follow a unified project specification.

The Onchain Detective agent integrates MCP (Model Context Protocol) for blockchain data access, while the Hedera external agent provides specialized blockchain functionality via A2A protocol to query and interact with Hedera Testnet.