Mysti 2.0 BETA
An open-source coding workspace that brings your agents together inside VS Code.
Ask Claude Code and Codex for independent opinions. Give a specialist a specific task. Hand completed work to another agent for review. Keep their responses, context, permissions, and progress in one conversation.
Mysti connects the coding tools you choose—CLI agents, local model servers, and the DeepMyst-powered Mysti coordinator. Use one agent when that's enough; bring in more when another perspective helps.
2.0 is a beta. This checkout prepares the 2.0.0 pre-release package. The Marketplace badge shows the currently published version. See release status and limitations before adopting it for important work.
16 provider adapters + the Mysti coordinator · Parallel opinions · Cross-agent handoffs · Connected tools · Proactive context
See it work
The recordings below use the shipped webviews with deterministic sample responses. They demonstrate interaction and presentation; they are not live provider runs or performance benchmarks. Capture details and video downloads.
Get a second opinion without rewriting the question
An answer is a starting point. On answers with a usage or session receipt, click Second opinion, choose another configured agent, and Mysti sends it the original question. Compare separately attributed answers in the same conversation; use Brainstorm when you want a discussion and synthesis.
Ask two agents. Hear from both.
@claude @codex What are your opinions on adding a cache to this API?
Explicit tags determine who does the work. Independent read-only assignments run concurrently within the configured limit. Each agent has its own live card and attributed answer—even if one of them is already your selected provider.
A failed participant stays visible. Mysti does not invent its answer or quietly ask the other agent to impersonate it.
Turn tags into a workflow
@claude Design a retry policy, then @codex review it for edge cases
Use then to make the next assignment depend on the previous result. Claude designs the policy; Codex receives that result to review. Progress cards show the current step and who runs next. A failed dependency blocks its dependent step.
Add roles such as @claude:critic or @codex:reviewer to make the perspective explicit. Independent advisory work can run in parallel; work that may edit a shared workspace runs serially. Assignment and workflow guide.
Switch agents without losing your draft
Choose from 16 registered provider adapters, plus the Mysti coordinator. Move between coding CLIs, local model servers, and API providers from the composer. Your draft stays in place, and model controls follow the selected provider's capabilities.
See all providers and setup requirements.
Keep model choices close to your work
Choose the model, adjust effort, and toggle Ultracode where the provider supports it. The model menu and action menu share the same settings. Dictation adds text to your draft for review before you send.
Bring your tools into the conversation
Connect apps and MCP servers through DeepMyst's Composio and Smithery catalogs. Bring code, team discussions, email, and calendar context within reach of your agents through the tools you authorize. Browse and authorize in DeepMyst, then manage connections from Mysti.
The recording shows sample authorized connections, not a live OAuth flow. Catalog availability and tool permissions depend on the service and your account; local CLI access is opt-in for supported adapters. A connected app is not automatically a Proactive monitoring source.
Get context before you start
Proactive brings selected local Git changes and DeepMyst-connected GitHub/Slack evidence into an inbox. The Before you start view helps you inspect relevant evidence for a responsibility, including source links and freshness information.
Cloud monitoring requires DeepMyst sign-in, a supported connection, and an explicitly configured responsibility. Coverage is bounded; evidence does not prove who owns a task. Proactive setup and limits.
Work through a decision with Brainstorm
Choose two configured agents and a discussion strategy. Quick collects independent analyses and synthesizes a response; Debate, Red Team, Perspectives and Delphi provide other ways to examine a proposal. Keep the individual reasoning visible alongside the synthesis.
More ways to move the work forward
| Feature | Why it matters | Explore |
|---|---|---|
| Brainstorm | Let two agents analyze, debate or challenge a proposal, then synthesize a response. | Discussion strategies |
| Canvas + Visual Test | Iterate on visual artifacts and inspect a running app alongside the code. | Visual workflows |
| Personas, skills and roles | Reuse project guidance and specialist perspectives instead of repeating instructions. | Team practices |
| Checkpoints + visible approvals | Inspect requested actions and recover supported local changes as you iterate. Checkpoints do not undo external actions. | Access and lifecycle |
| Dictation + context tools | Speak a draft, mention files, or attach diagnostics and Git context before sending. | Composer and context |
One workspace, several ways to work
| When you need… | Use… | What happens |
|---|---|---|
| A direct answer or implementation | A selected provider, or @claude / @codex |
The named agent handles the request with your access settings. |
| Independent perspectives | @claude @codex with a question or review request |
Read-only assignments run concurrently; results remain separately attributed. |
| An ordered handoff | @claude Write the parser, then @codex review it |
The reviewer receives the completed result as reference material. A failed dependency blocks the handoff. |
| A defined perspective | @claude:critic @codex:reviewer |
Catalog roles shape each response and restrict its access. |
| A structured discussion | Brainstorm | Choose a team and discussion strategy, then follow its rounds and synthesis. |
| A coordinating agent | Mysti | A DeepMyst-backed coordinator can answer, use configured tools, and delegate through permission gates. |
| Visual iteration | Canvas and Visual Test | Work with visual artifacts and inspect a running app; browser setup may be required. |
| Project-specific practices | Personas, skills, and roles | Reuse your team's guidance with explicit trust and access boundaries. |
Parallelism follows the work: independent advisory requests may overlap; writers share a workspace and run serially. Use then for an explicit dependency. Assignment syntax and troubleshooting.
Get started
- Install Mysti from the VS Code Marketplace, or install the reviewed beta VSIX with Extensions → Install from VSIX. Choose the pre-release channel when 2.0 BETA is published.
- Open a trusted local workspace. Mysti supports VS Code 1.86 or newer on Windows, macOS, and Linux. Native voice support and provider CLIs have their own host requirements.
- Open Mysti and choose your agent. The setup screen checks installation and authentication and provides the supported install, upgrade, or sign-in action. Mysti itself uses your DeepMyst account; CLI agents use their own credentials.
- Start with a small task. Try
@claude Explain the main entry point, then add@codexfor a second opinion when both are configured.
You only need one configured agent to begin. Provider subscriptions, API access, usage charges, and supported models vary. Getting started · [Provider setup