Mysti is a VS Code extension that enhances coding productivity by enabling multiple AI agents (Claude, Codex, Gemini, GitHub Copilot) to collaborate. It targets developers seeking to leverage collective AI intelligence for complex problem-solving, offering a "wisdom of the crowd" approach that aims to outperform single-agent solutions. The primary benefit is a more robust and synthesized output through AI-driven brainstorming and debate.

How It Works

Mysti facilitates AI collaboration through its "Brainstorm Mode," allowing any two of its supported AI providers (Claude Code, Codex, Gemini, GitHub Copilot) to work together. This multi-agent approach leverages the distinct training data and strengths of each AI to catch edge cases, offer diverse perspectives, and debate solutions before synthesizing a refined output. Users can choose between "Quick Mode" for direct synthesis or "Full Mode" for a more thorough AI critique and discussion, aiming for more robust solutions than a single AI could provide.

Quick Start & Requirements

Installation involves adding the Mysti extension via VS Code's command palette (ext install DeepMyst.mysti) or the VS Code Marketplace. Users must have existing subscriptions and installed CLI tools for their chosen AI providers (e.g., @anthropic-ai/claude-code, @github/copilot-cli, @google/gemini-cli, or OpenAI's Codex CLI). At least two CLI tools are required to enable Brainstorm Mode. Authentication is handled via one-click buttons within the extension.

Highlighted Details

• Multi-Agent Collaboration: Combines any two of Claude, Codex, Gemini, or GitHub Copilot in "Brainstorm Mode" for collaborative problem-solving.
• 16 Developer Personas: Allows users to select specialized AI personas (e.g., Architect, Debugger, Security-Minded) to tailor the AI's approach.
• 12 Toggleable Skills: Offers behavioral modifiers like "Concise," "Test-Driven," and "First Principles" to refine AI output.
• Permission Controls: Granular control over AI access levels, from read-only to full autonomous modification ("ask-permission" is the default).

Maintenance & Community

The project is developed by DeepMyst Inc. Contribution guidelines are available in CONTRIBUTING.md. No specific community channels (like Discord/Slack) or roadmap links are provided in the README.

Licensing & Compatibility

Mysti is released under the MIT License, permitting free use, modification, and distribution, including for commercial purposes.

Limitations & Caveats

The extension relies on users having pre-existing subscriptions and correctly configured CLI tools for the supported AI providers. Intelligent Plan Detection requires at least two CLI tools to be installed. The effectiveness of the multi-agent approach is dependent on the quality and interaction of the chosen AI providers.