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Plan mode is a guided start. Instead of building straight from your prompt, Mythos first asks a few questions about your project, turns your answers into a few rendered design directions you choose between, and shows you a short build plan to approve. Only after you approve does the build run.
Build mode vs Plan mode. In Build mode Mythos builds directly from your prompt. In Plan mode it questions → designs → plans first, then builds. Toggle it next to the send button. Planning is free — you only spend credits when the build actually runs.

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Why use it

  • Fewer wasted builds. Choosing the look up front means fewer “make it darker / change the font” edits afterward — which saves credits.
  • You pick the design by sight. Instead of describing a palette in words, you choose between a few rendered design mockups — each a hero plus one section — built from your answers.
  • No surprises. You see and can edit the plan before any code exists.

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How it works

1

Turn on Plan mode and send your prompt

Toggle Plan by the composer, then describe what you want. Mythos opens a short questionnaire.
2

Answer a few questions

A short set of onboarding-style questions chosen for your brief — what the site should show, what it should do, and other specifics. Answer in a couple of clicks, or Skip all to let Mythos decide. (Mythos may also offer a few brand-color palettes to pick from.)
3

Choose a design direction

Mythos generates a few distinct design directions from your answers — each a rendered mockup of the hero plus one section, in its own palette, typography, and layout. Pick the one you like, or skip to let Mythos choose. Rendering the previews takes a moment.
4

Review the plan

Mythos presents a concrete plan — the sections, the design tokens, the components it will create, and what’s explicitly not included. Review, optionally edit it, and Approve — or Skip to abandon planning.
5

Build

On approval, the build runs faithfully to the design you chose. This is the only step that spends credits (3 for a new project).

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What the questions cover

The questionnaire is short and concrete — it gathers the brief, not a settings form. Mythos picks the questions that fit your prompt, so they vary from project to project. Common ones include:
  • What the site shows — its services or sections.
  • Typography — the type pairing.
  • A form with a database? — whether you need submissions saved (which uses your connected Supabase).
Mythos may also present a few brand-color palettes to choose between. Your answers feed the design step directly, so the directions are concrete executions of your brief.

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Example prompt

A Plan-mode prompt is just a normal first prompt — turn Plan on, then describe the project: 
Build a booking site for a small pilates studio called Still Point.
Pages: home, classes, pricing, and a contact form. Calm, minimal feel.
Mythos opens the questionnaire from there, then shows design directions and a plan before any build runs.

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Limitations & good to know

  • Plan mode is for starting a project. To change an existing one, prompt it in Build mode.
  • The design step is the slowest part — it renders the previews. A short wait there is normal, not a hang.
  • Skipping the questionnaire or the designs is always allowed; Mythos fills the gaps itself.

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FAQ

No. Questions, designs, and plan review are free. You only spend credits on the build after you approve.
Yes. Review the plan, change it, then approve — Mythos builds what you approved.
Skip the design step and Mythos picks the strongest direction itself, or restart planning with a clearer prompt.
Longer than the other steps — it renders the previews. Give it a minute or two; it isn’t stuck.