Dirac

Dirac is an open-source AI coding agent built for accuracy and token efficiency, reducing API costs by 64.8% on average compared to competing agents. It achieves this through hash-anchored parallel edits, AST-native manipulation, and tightly curated context management that keeps LLM reasoning sharp even on large, complex tasks. Dirac topped the Terminal-Bench-2 leaderboard with a 65.2% score using gemini-3-flash-preview, outperforming both Google's official baseline and the top closed-source agent. It is available as both a VS Code extension and a CLI tool.

• Hash-Anchored Edits: Uses stable line hashes to target edits with extreme precision, avoiding issues caused by traditional line-number-based editing.
• AST-Native Precision: Built-in understanding of TypeScript, Python, C++, and other language syntax enables structural manipulations like function extraction and class refactoring with high accuracy.
• Multi-File Batching: Processes and edits multiple files in a single LLM roundtrip, significantly reducing latency and API costs.
• High-Bandwidth Context Curation: Keeps context lean and relevant, ensuring the LLM always has the most useful information without wasting tokens.
• Autonomous Tool Use: Reads/writes files, executes terminal commands, and uses a headless browser — all with an approval-based workflow to keep users in control.
• Skills & AGENTS.md Support: Customize behavior with project-specific instructions via AGENTS.md files; also reads from .ai, .claude, and .agents directories.
• Multi-Provider Support: Works with Anthropic, OpenAI, OpenRouter, Gemini, Groq, Mistral, xAI, HuggingFace, and more via environment variable configuration.
• VS Code Extension: Install directly from the VS Code Marketplace and use the Dirac sidebar to configure your AI provider and start tasks.
• CLI Quick Start: Install globally with npm install -g dirac-cli, authenticate with dirac auth, then run tasks like dirac "Analyze the architecture of this project".
• Plan Mode & Yolo Mode: Use -p flag to preview strategy before execution, or -y flag to auto-approve all actions for simple fixes.