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Your first project

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Before you build

Verify your email (email/password accounts). The coding agent will not run until the account is verified. Google signup is typically verified via OAuth. See Email verification.

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Create a project

From the dashboard after login:
  1. Describe the app you want in the prompt (for example: “a waitlist landing page with email capture”).
  2. Optionally name a stack in the prompt (for example “Next.js” or “static HTML”) — there is no template picker; the agent chooses the stack from your description.
Mythex creates a project and boots an isolated cloud sandbox with a git-backed workspace.

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What happens next

  1. The agent starts implementing your request inside the sandbox.
  2. Events stream in the chat (text, tool calls, progress).
  3. The live preview updates as the app becomes runnable.
  4. You can switch to Code for the file tree, Monaco editor, and terminal.

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Chat to iterate

Treat the first result as a draft. Follow up with concrete asks:
  • “Make the hero darker and add a pricing section”
  • “Add a /settings page with a profile form”
  • “Store signups in the project database”
See Effective prompts and Iterate.

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Preview vs Code

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Checkpoints

Successful agent work is typically committed in the project git history as restorable checkpoints — use them when you want to roll back a bad turn.