Agent-C
An ultra-lightweight AI agent written in C that communicates with OpenRouter API and executes shell commands.
Features
- Zero Dependencies: No curl, no libssl — native TLS via macOS SecureTransport
- Tool Calling: OpenAI-compatible
toolsAPI for shell command execution - Streaming: Tokens print as they arrive via SSE
- ~4KB binary: Single file (
agent.c), LZMA self-extracting archive - Conversation Memory: Sliding window of 20 messages with tool call history
- Cross-Platform: macOS and Linux
Quick Start
export OR_KEY=your_openrouter_api_key
make
./agent-c
Build
make # auto-detect platform
make macos # macOS with LZMA compression
make linux # Linux with UPX compression
make clean # remove build artifacts
How It Works
The agent connects to OpenRouter, sends messages with a sh tool definition, and streams the response. When the model returns a tool_calls response, the agent executes the command, sends the result back, and gets a follow-up response. Up to 5 tool calls per turn.
See SPEC.md for full architecture and test cases.
License
CC0 — No Rights Reserved