> ## Documentation Index
> Fetch the complete documentation index at: https://docs.heyniblet.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Developer limits

> Keep projects, source, previews, and submissions within current platform bounds.

| Limit                     | Current bound                                  |
| ------------------------- | ---------------------------------------------- |
| App canvas                | 64×32 pixels                                   |
| Top-level Starlark files  | Exactly one                                    |
| Source encoding           | Non-empty UTF-8, no NUL bytes                  |
| Source size               | 128 KiB maximum                                |
| Review preview            | Non-empty WebP, 2 MiB maximum                  |
| Local validation render   | 1 second target bound                          |
| Local push render timeout | 30 seconds                                     |
| Developer projects        | 5 per account during preview                   |
| Saved developer source    | 50 MiB per account during preview              |
| Active submission         | One queued or in-review submission per project |

MCP inputs add field-specific bounds, UUID validation, configuration-schema checks, rate limits, and explicit confirmation for destructive operations.

<Warning>
  Limits can become stricter before public launch. Treat a passing browser preview as development feedback, not proof that hosted or physical-device gates pass.
</Warning>