Your AI Coding team for VSCode
Use Claude Code, Codex, Gemini, or GitHub Copilot — or combine any two in Brainstorm Mode and never hit bottlenecks
Wisdom of the crowd where the collective intelligence of several agents outperforms a single one.
Providers • Brainstorm • Features • Quick Start • Config
Mysti now supports GitHub Copilot CLI as a fourth provider! Access 14+ models including Claude, GPT-5, and Gemini through your GitHub Copilot subscription.
Supported Models via Copilot:
- Anthropic: Claude Sonnet 4.5, Claude Opus 4.5, Claude Haiku 4.5
- OpenAI: GPT-5.2, GPT-5.1 Codex Max, GPT-5.1 Codex, GPT-5
- Google: Gemini 3 Pro, Gemini 3 Flash, Gemini 2.5 Pro
When a provider isn't authenticated, Mysti now shows a friendly error with:
- Clear instructions on how to authenticate
- One-click "Open Terminal & Authenticate" button
- Works for all providers (Claude, Codex, Gemini, Copilot)
Improved text formatting for CLI outputs with proper markdown rendering.
From VS Code: Press Ctrl+P (Cmd+P on Mac), then paste:
ext install DeepMyst.mysti
Or install from the VS Code Marketplace
Mysti works with the AI coding tools you already have. No extra subscriptions needed.
| Provider | Best For |
|---|---|
| Claude Code | Deep reasoning, complex refactoring, thorough analysis |
| Codex | Quick iterations, familiar OpenAI style |
| Gemini | Fast responses, Google ecosystem integration |
| GitHub Copilot | Multi-model access (Claude, GPT-5, Gemini) via GitHub subscription |
| Brainstorm Mode | Any two AIs collaborate and debate solutions |
Switch providers with one click. No lock-in.
| vs Copilot/Cursor | Mysti Advantage |
|---|---|
| Single AI | Multi-agent brainstorming — two AIs collaborate |
| Locked to one provider | Use any CLI — Claude, Codex, or Gemini |
| Black box | Full permission control — read-only to full-access |
| Generic responses | 16 personas — architect, debugger, security expert... |
Beautiful, modern chat interface with syntax highlighting, markdown support, and mermaid diagrams
Want a second opinion? Enable Brainstorm Mode and let two AI agents tackle your problem together. Choose any 2 of 4 agents (Claude, Codex, Gemini, or GitHub Copilot) from the settings panel.
Claude Code (Anthropic), Codex (OpenAI), Gemini (Google), and GitHub Copilot (multi-model) have different training, different strengths, and different blind spots. When any two work together:
- Each AI catches edge cases the other might miss
- Different perspectives lead to more robust solutions
- Together they debate, challenge each other, and synthesize the best solution
It's like having a senior dev and a tech lead review your code—except they actually discuss it first.
Configure which two agents collaborate in the Settings Panel:
| Combination | Best For |
|---|---|
| Claude + Codex | Deep analysis meets rapid iteration |
| Claude + Gemini | Thorough reasoning with fast validation |
| Claude + Copilot | Compare native Claude vs Copilot's multi-model approach |
| Codex + Gemini | Quick iterations with Google ecosystem knowledge |
| Copilot + Gemini | Multi-model flexibility with Google integration |
Your Request
|
v
+-----------+-----------+
| Agent 1 | Agent 2 |
| analyzes | analyzes |
+-----+-----+-----+-----+
| |
v v
+---------------------------+
| Discussion (Full Mode) |
| Agents review each other's|
| solutions and debate |
+-----------+---------------+
|
v
+---------------------------+
| Synthesis |
| Best ideas combined into |
| one refined solution |
+---------------------------+
| Quick Mode | Full Mode |
|---|---|
| Direct synthesis | Agents discuss first |
| Both agents respond, then merge | Each AI critiques the other's solution |
| Faster results | More thorough analysis |
| Good for simple tasks | Best for complex architecture decisions |
When the AI presents multiple implementation approaches, Mysti automatically detects them and lets you choose your preferred path.
Requires at least 2 CLI tools installed. See Requirements.
Shape how your AI thinks. Select from specialized personas that change the AI's approach to your problems.
| Persona | Focus |
|---|---|
| Architect | System design, scalability, clean structure |
| Debugger | Root cause analysis, bug fixing |
| Security-Minded | Vulnerabilities, threat modeling |
| Performance Tuner | Optimization, profiling, latency |
| Prototyper | Quick iteration, PoCs |
| Refactorer | Code quality, maintainability |
| + 10 more... | Full-Stack, DevOps, Mentor, Designer... |
Select personas directly from the toolbar without opening panels.
Mysti automatically suggests relevant personas and actions based on your message.
Never lose your work. All conversations are saved and easily accessible.
Get started fast with one-click actions for common tasks.
Fine-tune every aspect of Mysti including token budgets, access levels, and brainstorm mode.
Already paying for Claude, ChatGPT, Gemini, or GitHub Copilot? You're ready to go.
Mysti works with your existing subscriptions—no additional costs!
| CLI Tool | Subscription | Install |
|---|---|---|
| Claude Code (recommended) | Anthropic API or Claude Pro/Max | npm install -g @anthropic-ai/claude-code |
| GitHub Copilot CLI | GitHub Copilot Pro/Pro+/Business | npm install -g @github/copilot-cli |
| Gemini CLI | Google AI API or Gemini Advanced | npm install -g @google/gemini-cli |
| Codex CLI | OpenAI API | Follow OpenAI's installation guide |
You only need one CLI to get started. Install any two to unlock Brainstorm Mode.
Option A: Press Ctrl+P (Cmd+P on Mac), paste and run:
ext install DeepMyst.mysti
Option B: Install from VS Code Marketplace
# Claude Code (recommended)
npm install -g @anthropic-ai/claude-code
claude auth login
# Or GitHub Copilot CLI (access Claude, GPT-5, Gemini via GitHub)
npm install -g @github/copilot-cli
copilot # then use /login command
# Or Gemini CLI
npm install -g @google/gemini-cli
gemini auth loginFor Brainstorm Mode, install any two CLI tools.
- Click the Mysti icon in the Activity Bar, or
- Press
Ctrl+Shift+M(Cmd+Shift+Mon Mac)
Type your request and let the AI assist you!
Mix and match behavioral modifiers:
- Concise - Clear, brief communication
- Test-Driven - Tests alongside code
- Auto-Commit - Incremental commits
- First Principles - Fundamental reasoning
- Scope Discipline - Stay focused on the task
- And 7 more...
Stay in control of what the AI can do:
- Read-only - AI can only read, never modify
- Ask-permission - Approve each file change
- Full-access - Let the AI work autonomously
{
"mysti.defaultProvider": "claude-code",
"mysti.brainstorm.agents": ["claude-code", "google-gemini"],
"mysti.brainstorm.discussionMode": "full",
"mysti.accessLevel": "ask-permission"
}| Setting | Default | Description |
|---|---|---|
mysti.defaultProvider |
claude-code |
Primary AI provider (claude-code, openai-codex, google-gemini, github-copilot) |
mysti.brainstorm.agents |
["claude-code", "openai-codex"] |
Which 2 agents to use in brainstorm mode |
mysti.brainstorm.discussionMode |
quick |
quick or full |
mysti.accessLevel |
ask-permission |
File access level |
mysti.agents.autoSuggest |
true |
Auto-suggest personas |
mysti.copilotPath |
copilot |
Path to GitHub Copilot CLI executable |
| Action | Windows/Linux | Mac |
|---|---|---|
| Open Mysti | Ctrl+Shift+M |
Cmd+Shift+M |
| Open in New Tab | Ctrl+Shift+N |
Cmd+Shift+N |
| Command | Description |
|---|---|
Mysti: Open Chat |
Open the chat sidebar |
Mysti: New Conversation |
Start fresh |
Mysti: Add to Context |
Add file/selection to context |
Mysti: Clear Context |
Clear all context |
Mysti: Open in New Tab |
Open chat as editor tab |
Mysti collects anonymous usage data to improve the extension:
- Feature usage patterns
- Error rates
- Provider preferences
No code, file paths, or personal data is ever collected.
Respects VSCode's telemetry setting. Disable via: Settings > Telemetry: Telemetry Level > off
We welcome contributions! Whether it's bug reports, feature requests, or code contributions.
- Good First Issues: Look for
good first issuelabels - Development: Press
F5in VS Code to launch Extension Development Host - Pull Requests: Fork, create a feature branch, and submit a PR
See CONTRIBUTING.md for detailed guidelines.
MIT License — free to use, modify, and distribute, including for commercial purposes.
See the LICENSE file for full text.
Install • Report Issue • GitHub
Mysti — Built by DeepMyst Inc
Made with Mysti
