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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. Or open Templates on the marketing site, pick a niche, and click Use template to start with a curated prompt.
  3. Optionally attach images or files (mockups, screenshots) — they carry into the first chat turn.
  4. Optionally name a stack in the prompt (for example “Next.js” or “static HTML”) — the agent chooses the stack from your description unless you specify otherwise.
Mythex creates a project and boots an isolated cloud sandbox with a git-backed workspace. Workspace after you start a project

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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

After a successful agent turn, Mythex saves a git checkpoint. Use Restore on that turn in chat when you want to roll back a bad change. See Chat and Iterate.