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mini-app-builder

Skill1 starsChanged 49 days agoMITView on GitHub

Scaffolds Telegram Mini App (TMA) interfaces, WebApp SDK bindings, and cryptographic auth validation.

The file

We split this skill into the rules it gives an agent

5 rules. About 0 are common, 1 is distinctive, and 4 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈1

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 4

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Follow these constraints when building Telegram Mini Apps (TMAs):

    line 9
  2. Very specific:

    Import the official Telegram WebApp SDK: https://telegram.org/js/telegram-web-app.js.

    line 12
  3. Very specific:

    Call window.Telegram.WebApp.ready() upon DOM mount.

    line 13
  4. Very specific:

    Call window.Telegram.WebApp.expand() to maximize vertical canvas.

    line 14
  5. Very specific:

    Read CSS variables directly from window.Telegram.WebApp.themeParams:

    line 16

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Telegram Mini App Protocol

Follow these constraints when building Telegram Mini Apps (TMAs):

  1. Frontend Initialization:
    • Import the official Telegram WebApp SDK: https://telegram.org/js/telegram-web-app.js.
    • Call window.Telegram.WebApp.ready() upon DOM mount.
    • Call window.Telegram.WebApp.expand() to maximize vertical canvas.
  2. Theme Adaptation:
    • Read CSS variables directly from window.Telegram.WebApp.themeParams:
      • --tg-theme-bg-color
      • --tg-theme-text-color
      • --tg-theme-button-color
      • --tg-theme-button-text-color
  3. Backend Signature Validation:
    • Validate initData on all API endpoints accepting TMA requests.
    • Parse initData query string into key-value pairs.
    • Sort keys alphabetically, excluding hash.
    • Form data check string: key=value\n.
    • Compute HMAC-SHA256 signature using WebAppData key and the bot token.
    • Compare computed hash against transmitted hash using constant-time comparison.
    • Reject requests with stale auth_date values (> 86400 seconds).
  4. Native Controls:
    • Bind MainButton for primary form submissions.
    • Bind BackButton to router state history.

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