Structured outputs start from structured thoughts. Struppëflo is a thinking canvas that compiles itself into the brief a frontier model can actually finish in one pass. Drop your thoughts as cards. Group them into named zones. The layout becomes the prompt. No account. No lock-in. Bring your own key or run entirely in the browser. Local-first: boards live in your browser, your data never touches our servers. Free during launch. Open source (AGPL-3.0).