拒绝两段Colors冲突，同时保留自定义图像规范

{
  "inputRows": [
    {
      "section": "Colors",
      "order": 1,
      "text": "primary=#184A45"
    },
    {
      "section": "Colors",
      "order": 2,
      "text": "primary=#673AB7"
    },
    {
      "section": "Photography",
      "order": 3,
      "text": "自然光，人物在画面左侧"
    }
  ],
  "referenceRows": [
    {
      "officialVersion": "0.4.0",
      "duplicateHeadingExit": 0,
      "actualFinding": "section-order warning in this fixture"
    },
    {
      "officialVersion": "0.4.0",
      "duplicateTopKeyExit": 0,
      "actualFinding": "warning in this fixture"
    },
    {
      "projectGate": "duplicate title/top key checker",
      "conflictExpectedExit": 1,
      "fixedExpectedExit": 0
    }
  ],
  "invalidRows": [
    {
      "policy": "last Colors wins",
      "error": "duplicate section rejected"
    },
    {
      "policy": "remove Photography",
      "error": "custom section needlessly lost"
    }
  ],
  "notes": [
    "作者自制可编辑输入与验收参考，非官方CLI或云端返回。",
    "完整合法基础稿采用官方frontmatter schema；仅按本课故意更改对应字段。"
  ],
  "designMdTemplate": "---\nversion: alpha\nname: Field Kit\ncolors:\n  primary: \"#184A45\"\n  surface: \"#F7F4EC\"\ntypography:\n  body-md:\n    fontFamily: Arial\n    fontSize: 16px\n    fontWeight: 400\n    lineHeight: 1.6\nrounded:\n  sm: 8px\nspacing:\n  sm: 8px\ncomponents:\n  button-primary:\n    backgroundColor: \"{colors.primary}\"\n    textColor: \"#FFFFFF\"\n    typography: \"{typography.body-md}\"\n    rounded: \"{rounded.sm}\"\n    padding: \"{spacing.sm}\"\n---\n## Overview\nField Kit的预约界面。\n## Colors\n主色用于主要操作。\n## Typography\n正文使用body-md。\n## Layout\n使用8px间距。\n## Shapes\n使用8px圆角。\n## Components\n主要按钮统一消费语义引用。\n",
  "officialSchemaUrl": "https://github.com/google-labs-code/design.md/blob/main/docs/spec.md",
  "files": {
    "input.json": "[\n  {\n    \"section\": \"Colors\",\n    \"order\": 1,\n    \"text\": \"primary=#184A45\"\n  },\n  {\n    \"section\": \"Colors\",\n    \"order\": 2,\n    \"text\": \"primary=#673AB7\"\n  },\n  {\n    \"section\": \"Photography\",\n    \"order\": 3,\n    \"text\": \"自然光，人物在画面左侧\"\n  }\n]\n",
    "reference.json": "{\n  \"identity\": \"作者验收参考，非模型返回\",\n  \"rows\": [\n    {\n      \"section\": \"Colors\",\n      \"count\": 1\n    },\n    {\n      \"token\": \"primary\",\n      \"approvedValue\": \"#184A45\"\n    },\n    {\n      \"section\": \"Photography\",\n      \"preserved\": true\n    }\n  ]\n}\n",
    "invalid.json": "{\n  \"identity\": \"作者构造负例，非实际错误回包\",\n  \"rows\": [\n    {\n      \"policy\": \"last Colors wins\",\n      \"error\": \"duplicate section rejected\"\n    },\n    {\n      \"policy\": \"remove Photography\",\n      \"error\": \"custom section needlessly lost\"\n    }\n  ]\n}\n",
    "case.md": "# DESIGN.md重复章节：对照规范与0.4.0行为，给冲突另设检查门槛\n\nDESIGN.md重复章节在规范中要求避免，但本地官方CLI 0.4.0对本课重复标题与跨YAML顶层键样本仍退出0。本课先保留真实差异，再增加独立重复检查，防止仅凭退出码接受冲突颜色。\n\n## 保留冲突原稿\n\n使用两段Colors和独立Photography的DESIGN-conflict.md，另备批准主色#184A45。\n\n不要在检查前合并，先保留能复现问题的输入。\n\n## 固定发布版和规范\n\n记录实际npm版本0.4.0，并保存main规范所述重复章节/顶层key要求。\n\n规范要求和发布实现可能不同，二者分别记录。\n\n## 读真实lint原文\n\n本课实际0.4.0对重复标题退出0，仅有section-order warning；跨YAML顶层colors重复也是warning。\n\n不能写成CLI已经以error拒绝这两个样本。\n\n## 另设重复检查门槛\n\n运行作者check-duplicate.py检查本课标题唯一性和已知顶层组重复。\n\n这是本课交付门槛，覆盖范围写清，不冒称完整官方解析器。\n\n## 合并权威颜色说明\n\n按brand-approval.json保留一个Colors，删除冲突说法。\n\nPhotography是自定义上下文，应继续保留。\n\n## 重跑两层检查\n\n对修复文件分别运行官方lint和作者重复检查，保留各自stdout与退出码。\n\n官方零退出和项目门槛通过是两个不同结论。\n\n## 交付版本差异报告\n\n打包原稿、修复稿、规范链接和两层检查记录。\n\n升级CLI后重新执行，不能把0.4.0行为当永远不变。\n\n身份：输入与参考为作者材料；localCli有实测记录时仅证明对应CLI运行，目标云端与模型推理未执行。\n",
    "DESIGN-conflict.md": "---\nversion: alpha\nname: Field Kit\ncolors:\n  primary: \"#184A45\"\n  surface: \"#F7F4EC\"\ntypography:\n  body-md:\n    fontFamily: Arial\n    fontSize: 16px\n    fontWeight: 400\n    lineHeight: 1.6\nrounded:\n  sm: 8px\nspacing:\n  sm: 8px\ncomponents:\n  button-primary:\n    backgroundColor: \"{colors.primary}\"\n    textColor: \"#FFFFFF\"\n    typography: \"{typography.body-md}\"\n    rounded: \"{rounded.sm}\"\n    padding: \"{spacing.sm}\"\n---\n## Overview\nField Kit的预约界面。\n## Colors\n主色用于主要操作。\n## Typography\n正文使用body-md。\n## Layout\n使用8px间距。\n## Shapes\n使用8px圆角。\n## Components\n主要按钮统一消费语义引用。\n\n## Colors\n备选紫色#673AB7，不是批准版本。\n## Photography\n自然光，人物靠左。\n",
    "DESIGN-fixed.md": "---\nversion: alpha\nname: Field Kit\ncolors:\n  primary: \"#184A45\"\n  surface: \"#F7F4EC\"\ntypography:\n  body-md:\n    fontFamily: Arial\n    fontSize: 16px\n    fontWeight: 400\n    lineHeight: 1.6\nrounded:\n  sm: 8px\nspacing:\n  sm: 8px\ncomponents:\n  button-primary:\n    backgroundColor: \"{colors.primary}\"\n    textColor: \"#FFFFFF\"\n    typography: \"{typography.body-md}\"\n    rounded: \"{rounded.sm}\"\n    padding: \"{spacing.sm}\"\n---\n## Overview\nField Kit的预约界面。\n## Colors\n主色用于主要操作。\n## Typography\n正文使用body-md。\n## Layout\n使用8px间距。\n## Shapes\n使用8px圆角。\n## Components\n主要按钮统一消费语义引用。\n\n## Photography\n自然光，人物靠左。\n",
    "brand-approval.json": "{\n  \"identity\": \"作者品牌练习批准值\",\n  \"primary\": \"#184A45\"\n}\n",
    "check-duplicate.py": "import re,sys,collections\nfrom pathlib import Path\ns=Path(sys.argv[1]).read_text()\nheadings=[x.strip().lower() for x in re.findall(r\"^##\\s+(.+)$\",s,re.M)]\nduplicates=[x for x,n in collections.Counter(headings).items() if n>1]\n# Scope: exact H2 titles and unindented known YAML group keys in this lesson.\nkeys=re.findall(r\"^(colors|typography|rounded|spacing|components):\",s,re.M)\nduplicates += [\"yaml:\"+x for x,n in collections.Counter(keys).items() if n>1]\nprint({\"scope\":\"lesson duplicate titles and known top-level groups\",\"duplicates\":duplicates})\nraise SystemExit(1 if duplicates else 0)\n",
    "duplicate-section.stdout.txt": "{\n  \"findings\": [\n    {\n      \"severity\": \"info\",\n      \"message\": \"Design system defines 2 colors, 1 typography scale, 1 rounding level, 1 spacing token, 1 component.\",\n      \"rule\": \"token-summary\"\n    },\n    {\n      \"severity\": \"warning\",\n      \"message\": \"Section 'Components' appears before 'Colors', which is out of order. Expected order: Overview, Colors, Typography, Layout, Elevation & Depth, Shapes, Components, Do's and Don'ts\",\n      \"rule\": \"section-order\"\n    }\n  ],\n  \"summary\": {\n    \"errors\": 0,\n    \"warnings\": 1,\n    \"infos\": 1\n  }\n}\n",
    "duplicate-section.stderr.txt": "",
    "duplicate-top-key.stdout.txt": "{\n  \"findings\": [\n    {\n      \"severity\": \"warning\",\n      \"message\": \"Section 'colors' is defined in both frontmatter and code block 1.\"\n    }\n  ],\n  \"summary\": {\n    \"errors\": 0,\n    \"warnings\": 1,\n    \"infos\": 0\n  }\n}\n",
    "duplicate-top-key.stderr.txt": "",
    "local-cli-receipt.json": "{\n  \"status\": \"executed\",\n  \"package\": \"@google/design.md\",\n  \"version\": \"0.4.0\",\n  \"cases\": [\n    {\n      \"case\": \"duplicate-section\",\n      \"exitCode\": 0,\n      \"stdoutSha256\": \"c5b16a41e3f3411951ab4da4235d92625f36bc68efe32e72ed0bdc7c0f573cec\"\n    },\n    {\n      \"case\": \"duplicate-top-key\",\n      \"exitCode\": 0,\n      \"stdoutSha256\": \"d3599230038c9bafa2a53052501fb1304901317811f5e6a92c900eed05dd1465\"\n    }\n  ]\n}\n",
    "project-duplicate-conflict.stdout.txt": "{'scope': 'lesson duplicate titles and known top-level groups', 'duplicates': ['colors']}\n",
    "project-duplicate-fixed.stdout.txt": "{'scope': 'lesson duplicate titles and known top-level groups', 'duplicates': []}\n"
  }
}