# Limits and privacy

- **No judge:** the app only checks that a timed line is more than a tiny mark.
  It does not identify objects, use AI, measure artistic talent or verify results
  on a server. Imports can be authored manually; all outcomes are self-reported.
- **Local recovery is not a backup:** browser storage can be denied, exhausted,
  cleared or unavailable in private browsing. Export JSON for durable editable
  copies. PNG preserves the image, not editing metadata. Recovery saves happen
  at start/end and at most every 750 ms during input; abrupt crashes can lose
  the last fraction of a second. Closing while storage is unavailable asks the
  browser for its native warning, which browsers may suppress.
- **Six snapshots, one undo:** shelf capacity is six, with explicit removal. Undo
  restores the previous drawing/shelf operation only; it is not a full history and
  does not survive page reopening. The active drawing is separate from snapshots.
- **Concurrent tabs:** a detected change from another tab blocks further writes in
  this tab, preserves its current work in memory and shows a conflict message.
  Export before explicitly replacing a local save. This is not collaborative editing.
- **Safety bounds:** 1,200 points per drawing; integer coordinates 0–1,000; JSON
  import at most 64 KiB; local storage envelope at most 512 KiB. Reaching the point
  cap stops and keeps a drawing without awarding timed completion.
- **Timers:** 20-second mode requires uninterrupted pointer contact and foreground
  operation. Hidden pages, blur, pointer cancellation/loss, explicit pause or a
  frame gap over 1.2 seconds interrupt it. A slow/busy device may interrupt an
  otherwise honest attempt. Reopened timers never complete silently. Untimed
  studio is the accessible alternative; keyboard input cannot earn a timed result.
- **Studio continuity:** a new studio stroke connects from the previous endpoint.
  Undo can remove the last drawing action. There is no eraser, multi-stroke layer
  model, AI generation, vector file export or guaranteed geometry recognition.
- **Exports:** PNG is a real 1,200 × 1,460 raster generated by the browser. Export
  failure is reported; no text file is disguised as PNG. Clipboard permission
  failure reveals selectable text. Browsers control download destinations.
- **No automatic sharing:** the app never sends artwork anywhere. A copied link
  includes only fixed challenge settings. JSON/PNG exports contain artwork and
  can be shared only through the user's own subsequent actions. There is no
  service worker, remote font/library or artwork upload in this product.
- **Optional counts:** the exact hosted Aikarai page can send first-party daily
  action counts only after an explicit opt-in, off by default. This lasts for the
  current page only and can be turned off at any time. Counts use fixed action,
  language and campaign categories; no drawings, clipboard text, filenames,
  account IDs or visitor identifiers are sent in measurement payloads. No replay
  or navigation history is recorded. Each action category is attempted at most
  once per page; no earlier action is backfilled and failed requests are not
  retried. Localhost, downloaded copies and other hosts send no counts. Consent
  checks and a short request timeout keep drawing usable when counts fail.
  Requests use the site's normal same-origin session/CSRF protection; ordinary
  host access logs and the site's privacy terms still apply. Local-only artwork
  and aggregate counts are not a promise of anonymous network access to the host.
  See `MEASUREMENT.md` for exact meanings and gaps. Feedback/catalogue links open
  the existing Aikarai site in a separate tab; no feedback is submitted for you.
- **Browser scope:** modern browsers with ES modules, Canvas 2D, Pointer Events,
  URL/Blob and local storage are expected. Storage/clipboard/canvas errors are
  surfaced. Browser, phone, assistive-technology and hosted qualification must be
  reported from actual tests; source inspection or unit tests do not establish
  universal compatibility or formal accessibility conformance.
- **Demo:** the supplied cat and campaign examples are original demonstrations,
  never real-user endorsements, usage evidence or proof of a timed achievement.

## Português

Não há avaliação de desenho nem IA em execução. A regra é uma brincadeira local;
resultados são autodeclarados. O estúdio sem tempo é a alternativa para teclado.
Pausar, sair da aba, perder o foco/captura ou reabrir um cronômetro interrompe o
desafio sem concluir. Dispositivos ocupados podem interromper tentativas legítimas.

O navegador pode apagar ou recusar dados. Exporte JSON para guardar uma cópia
editável. Há seis versões locais, um nível de desfazer, 1.200 pontos por desenho,
importação de até 64 KiB e armazenamento de até 512 KiB. Uma falha abrupta pode
perder a última fração de segundo. Alterações em outra aba bloqueiam gravações
desta aba até uma escolha explícita. Importações inválidas preservam seu trabalho.

PNG é uma imagem real de 1.200 × 1.460; falhas são informadas. Se a cópia automática
não funcionar, o texto fica selecionável. O link não contém o desenho; arquivos
exportados contêm. Nenhum desenho é enviado automaticamente. Contagens opcionais
na página hospedada pela Aikarai ficam desativadas por padrão e exigem sua escolha
explícita a cada página. Elas incluem apenas categorias fixas de ação, idioma e
campanha, sem desenhos, textos, nomes ou identificadores de visitantes. Desativar
interrompe novas tentativas; ações anteriores não são reenviadas. Cópias locais
não enviam contagens. O site pode manter registros normais de acesso e usa sua
proteção habitual de sessão. Links para opiniões e catálogo abrem outra aba, sem
envio automático de mensagens. O gato incluído é uma demonstração, não um resultado
de cliente. Não se afirma compatibilidade universal nem certificação de acessibilidade.