# MiniMax H3 drawstring prompt: gather one pouch opening without changing its body

Pull the two visible cord ends outward a little so that the existing pouch opening gathers. Couple cord travel with a changing fabric aperture rather than simply shrinking the whole bag.

Original synthetic practice still, not a generated result. No model run has been performed.

Files: first-frame.png (1024×1024 actual first-frame input), first-frame.svg (editable geometric design source; do not upload as if it were PNG), prompt.en.txt / prompt.zh.txt, acceptance.blank.csv (all observations empty), task-definition.json and RIGHTS-REVIEW.txt.

## Generator

Use MiniMax H3 base image-to-video. Turn on Add end frame to expose First Frame, upload first-frame.png only, and leave Last Frame empty. Fast requires a pair and is not covered. Choose only options offered by the current interface; opening it does not submit.

## Starting state

The original frontal drawing shows a coral pouch with an open oval mouth and a teal cord running through its upper hem. One cord end exits on each side; the broad lower body rests on a flat support.

Keep the bottom corners fixed and follow both cord exit points along the hem. The opening may narrow, but the pouch body and cord thickness should not scale down together.

## Steps

1. Locate the existing two exits and the open oval before submitting. Do not substitute a closed bag: the intended aperture change needs an observable starting opening.
2. Use a short outward pull and stop while an opening remains. Tying a bow and fully sealing the pouch would add separate tasks with hidden cord paths.
3. Compare the mouth, cord ends and bottom corners at the same pauses. A smaller mouth is not sufficient if it comes from scaling the whole pouch or inventing new exits.

## Acceptance

- The pouch base and lower body remain the same size and position.
- Both cord ends extend outward from their original hem exits.
- The opening narrows while visible fabric gathers increase around the same hem.
- The ending still shows one opening, one continuous cord and two original exits without a knot.

## Limits

This is visible routing and fabric-gathering planning, not a proof of actual bag capacity, knot security or a cloth-and-cord simulation.

Read prompt.en.txt before submitting. No pass results or output video are included.