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## Summary / 摘要

<!-- What does this PR do? One or two sentences. / 这个 PR 做了什么？一两句话说明。 -->

## Changes / 变更

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## Motivation / 动机

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Closes #

## Testing / 测试

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- [ ] `python -m unittest discover -s tests -p 'test_*.py'` passed
- [ ] `python -m compileall tools/` passed
- [ ] Manually tested: <!-- describe -->

## Checklist / 检查清单

- [ ] I read [CONTRIBUTING.md](../CONTRIBUTING.md)
- [ ] Docs updated if behavior or usage changed (README / SKILL.md / INSTALL.md)
- [ ] No secrets, tokens, or personal data committed
- [ ] New dependencies added to `requirements.txt` (if any)
- [ ] Tests added/updated for new functionality (or reason explained above)

## Screenshots / 截图 (optional)

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