)]}'
{
  "commit": "fbe54a0cbab7f773223f326292be4faf1ca797ce",
  "tree": "5e91c4bdf214b1f0018b1285bfa18eb53adb6b94",
  "parents": [
    "f330a7fb78840143222b71d4ab29dc2ac7686f9f"
  ],
  "author": {
    "name": "Claude Code",
    "email": "claude-code@anthropic.com",
    "time": "Mon Jan 12 10:37:01 2026 +0800"
  },
  "committer": {
    "name": "Claude Code",
    "email": "claude-code@anthropic.com",
    "time": "Mon Jan 12 10:37:01 2026 +0800"
  },
  "message": "Refactor variant nested group handling and improve iterator management\n\n- Enhanced HierarchicalDataIterator with shared root support and improved error handling\n- Refactored NestedGroupBuilder to consolidate offset padding logic via OffsetManager\n- Improved variant column reader/writer implementation for nested structures\n- Updated variant nested builder with better memory management\n\nCo-Authored-By: Claude Sonnet 4.5 \u003cnoreply@anthropic.com\u003e\n",
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