zap-coding-agent

Zap is an open-source coding agent built around one idea: stop wasting tokens. Most coding agents (including Gemini CLI) front-load 2,000–4,000 tokens of context before the user has said anything. Zap uses a skill-routing model instead — it loads only the knowledge relevant to the current task, so a greeting costs 31 tokens, not 2,000, and a Java task never pulls in React context. Under the hood, Zap builds an AST-based code index of your project, which means it understands the structure of your codebase and won't generate files that already exist. It ships as a single Rust binary with no runtime dependency — bring your own API key, no managed cloud, no telemetry. Benchmarked against alternatives and fully open source.

Developers use it as a token-efficient, open-source coding agent that loads only task-relevant context and understands codebase structure.