The app creator behind every product here

Principia's app-creator — designs, scaffolds, and exports runnable apps with a generated backend and auth, built on the shared lib/ui-controls component set. Every product on this page, live or planned, either was or will be built through it.

Watches, tests, and shields every app in the ecosystem

"Sentinel vai lhe mostrar com quantos erros se faz um sistema."

Principia's observer — monitors the fleet, runs the regression battery, mirrors the OpenSpec workflow, and turns in-session proposals into changes. Deployed 2026-08-03 to Fly.io as its own service (app-admin.sqlite + userTests/ on a persistent volume); the monorepo-scanning features (OpenSpec mirror, work-folder scan) are deliberately not bundled into this public image yet, so they report empty rather than crash — the fleet/test-execution/admin-config core is fully live.

Synced YouTube guitar tutorials

A minimalist music-study portal: pick a song and learn from a synced split view — YouTube player beside a scrollable frame grid that highlights and auto-scrolls to the current moment as the video plays. Read-only, no login, instant.

Skydive tracking and DZ intelligence — a Forge prototype

Jump logging, drop zone conditions, wind aloft data, gear management, and license progression tracking for skydivers. Concept stage — planned to be scaffolded through Forge, same as sdb-surf was.

Health tracking for pets (and humans too) — a Forge prototype

Vaccination schedules, vet appointments, nutrition tracking, exercise logs, and health reminders. Concept stage — planned to be scaffolded through Forge.

Condominium administration made simple — a Forge prototype

Financial management, assembly voting, maintenance tickets, common area booking, and resident communication. Concept stage — planned to be scaffolded through Forge.

Lightweight ERP for small businesses — a Forge prototype

Invoicing, inventory control, cash flow management, customer CRM, and Brazilian fiscal compliance (NF-e). Concept stage — planned to be scaffolded through Forge.

Photographers and photography lovers, organized by theme, exchanging knowledge

A second Forge app-creation test, generalizing sdb-surf's own scaffolding approach beyond surf — any subject, any theme, connecting photographers and enthusiasts around it. Skeleton only: identity + menu shaped, real features not built yet.

Automação comercial e contábil — codinome mini-sap

Third Forge app-creation test (2026-08-01): a contábil-based business-automation system. Its first real feature — Lançamentos — simulates despesas/receitas/saldo month by month across years for a small delivery-lunch restaurant (Cozinheiro · Caixa/Logística/Pedidos · Entregador), with Lucro = Faturamento − Despesas as the core mini-sap principle other apps (gestão-mão-de-obra, loja-de-conveniência, ...) are expected to reuse. Remaining menu areas (Clientes, Fornecedores, Contas a Pagar, Contas a Receber, Relatórios) are still identity-only.

Fill a freelance payment receipt, export as PDF — nothing saved

Scaffolded 2026-07-31 through Forge's simplest default pattern (no template borrowed from another app). Fills a Recibo de Pagamento a Autônomo — origin and target can each be a CPF or CNPJ person — and exports the result as a PDF. Session-only for now; a later pass links it to tonnew-org's lib/domain person model.