A connect start naming a connection target already needed the app's own secret, but the gate was
pinned for Joystick only and a whitespace or zero-width targetId passed both the start gate and the
callback mint. One predicate now serves both; the gate is pinned for twitch, youtube and joystick,
and the note for StreamPixels says what its redeem must do.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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