diff --git a/README.md b/README.md
index 6e97928..79c2cab 100644
--- a/README.md
+++ b/README.md
@@ -207,6 +207,8 @@ node packages/html-transform/src/cli.js scan
 `.spec.json` 會包含：
 
 - `pageContract`：頁面文字、欄位、表格、actions、layout evidence 與 Vuetify checklist。
+- `captureArtifacts`：screenshot、DOM summary、accessibility tree 與 capture metadata 的可追溯路徑。
+- `browserEvidence`：瀏覽器 resource failure 與 console warning/error。
 - `apiContract`：與該頁匹配的 API endpoints、用途分類、rejected candidates 與錯誤格式。
 - `prototypeGuide`：該 prototype 對應的人工 guide、舊 JSP/PB、target view 與 checklist。
 - `prototypeGuide.flowRefs`：從 guide 的 legacy flow code block 比對出的相關流程節點，包含 menu、task、nodeType、JSP、PB、動作與原始流程行。
diff --git a/src/lib/bdd.js b/src/lib/bdd.js
index 1a6ae8a..e2101e3 100644
--- a/src/lib/bdd.js
+++ b/src/lib/bdd.js
@@ -1,3 +1,10 @@
+/**
+ * 從已完成 route/API/maintenance enrich 的頁面 spec 產生 BDD 草稿。
+ * 正式 scenarios 只放相對穩定的主流程；不夠確定的錯誤、驗證與狀態規則會保留為候選或未覆蓋 evidence，避免 review 時被誤認為已完整。
+ *
+ * @example 寫回 scan spec
+ * `spec.bddContract = buildBddContract(spec)`
+ */
 export function buildBddContract(spec) {
   const pageKind = spec.maintenanceContract?.pageKind ?? 'page'
   const feature = inferFeature(spec)
@@ -21,6 +28,13 @@ export function buildBddContract(spec) {
   }
 }
 
+/**
+ * 將 BDD contract 轉成人工 review 友善的 Markdown。
+ * 輸出同時保留 Gherkin 草稿、scenario evidence trace、候選 scenario 與尚未覆蓋的 evidence。
+ *
+ * @example 寫入 artifact
+ * `await writeFile(path, renderBddContract(spec))`
+ */
 export function renderBddContract(spec, contract = spec.bddContract) {
   const lines = [`# BDD Contract: ${spec.page}`, '']
   lines.push(`Feature: ${contract.feature}`)
@@ -219,6 +233,10 @@ function scenario(value) {
   }
 }
 
+/**
+ * 從 checklist、legacy flow 與 API error format 找出值得人工補成 scenario 的線索。
+ * 這些線索不直接變成正式 Gherkin，因為 prototype evidence 通常不足以推斷完整 Given/When/Then。
+ */
 function buildCandidateScenarios(spec, scenarios, feature) {
   const candidates = []
   for (const item of spec.prototypeGuide?.checklist ?? []) {
@@ -238,6 +256,10 @@ function buildCandidateScenarios(spec, scenarios, feature) {
   return dedupeByKey(candidates, (candidate) => `${candidate.type}:${candidate.source}:${candidate.evidenceText}`)
 }
 
+/**
+ * 列出 scan 看得到、但沒有被正式 scenario 或候選 scenario 消化的 evidence。
+ * 這是 BDD review 的缺口清單，不代表 prototype 錯誤。
+ */
 function buildUncoveredEvidence(spec, scenarios, candidateScenarios) {
   const coveredText = [
     ...scenarios.flatMap((item) => [
@@ -322,6 +344,10 @@ function errorFormats(spec) {
   return []
 }
 
+/**
+ * 判斷人工文字是否已出現在正式 scenario 的可執行語意中。
+ * Checklist 與 flow refs 只是 trace，不算覆蓋，否則會遮蔽還沒寫成 scenario 的業務分支。
+ */
 function isCoveredByScenarios(text, scenarios) {
   return textIncludesEvidence(scenarios.flatMap((scenario) => [
     scenario.name,
@@ -330,8 +356,7 @@ function isCoveredByScenarios(text, scenarios) {
     ...scenario.then,
     ...scenario.evidence.fields,
     ...scenario.evidence.actions,
-    ...scenario.evidence.checklist,
-    ...scenario.evidence.flowRefs
+    ...scenario.evidence.endpoints
   ]).join(' '), text)
 }
 
@@ -342,7 +367,7 @@ function textIncludesEvidence(haystack, needle) {
   if (normalizedHaystack.includes(normalizedNeedle)) return true
   const keywords = normalizedNeedle.split(/\s+/).filter((word) => word.length >= 2)
   if (keywords.length === 0) return true
-  return keywords.some((word) => normalizedHaystack.includes(word))
+  return keywords.every((word) => normalizedHaystack.includes(word))
 }
 
 function normalizeForCoverage(text) {
diff --git a/src/lib/html.js b/src/lib/html.js
index f654c96..805af17 100644
--- a/src/lib/html.js
+++ b/src/lib/html.js
@@ -635,12 +635,28 @@ function groupFieldsIntoRows(fields) {
 function mergeInputs(sourceInputs, domInputs) {
   if (sourceInputs.length === 0) return domInputs
   if (domInputs.length === 0) return sourceInputs
-  return sourceInputs.map((sourceInput, index) => ({
-    ...domInputs[index],
-    ...sourceInput,
-    name: sourceInput.name ?? domInputs[index]?.name ?? null,
-    label: sourceInput.label ?? domInputs[index]?.label ?? null
-  }))
+  return sourceInputs.map((sourceInput, index) => {
+    const domInput = domInputs[index] ?? {}
+    const sourceLabel = meaningfulFieldLabel(sourceInput)
+    const domLabel = meaningfulFieldLabel(domInput)
+    return {
+      ...domInput,
+      ...sourceInput,
+      name: sourceInput.name ?? domInput.name ?? null,
+      label: sourceLabel ?? domLabel ?? sourceInput.label ?? domInput.label ?? null,
+      required: Boolean(sourceInput.required || domInput.required),
+      readonly: Boolean(sourceInput.readonly || domInput.readonly),
+      maxLength: sourceInput.maxLength ?? domInput.maxLength ?? null,
+      options: sourceInput.options?.length ? sourceInput.options : domInput.options ?? [],
+      defaultValue: sourceInput.defaultValue ?? domInput.defaultValue ?? null
+    }
+  })
+}
+
+function meaningfulFieldLabel(field) {
+  if (!field?.label) return null
+  if (field.label === field.name) return null
+  return field.label
 }
 
 function buildForms(summary) {
diff --git a/src/stages/scan.js b/src/stages/scan.js
index 770fd5b..a8a72ac 100644
--- a/src/stages/scan.js
+++ b/src/stages/scan.js
@@ -14,9 +14,8 @@ const viewports = [
 ]
 
 /**
- * 執行 Stage 1：掃描 prototype HTML，產生 deterministic evidence 與 LayoutSpec artifacts。
- *
- * @returns {Promise<void>}
+ * 掃描 prototype HTML 並產出可 review 的 evidence artifacts。
+ * 流程會先擷取 browser evidence，再用 app map、API catalog 與 prototype guide enrich 每頁 spec，最後才寫出完整 contract。
  */
 export async function scan() {
   const config = await loadConfig()
@@ -54,6 +53,10 @@ export async function scan() {
   console.log(`scan 完成：${htmlFiles.length} 個 HTML 檔案`)
 }
 
+/**
+ * 讀取 prototype 旁的人工導覽文件。
+ * 這些 guide 是 legacy JSP/PB、checklist 與 flow refs 的來源，後續 BDD 與 maintenance contract 都會使用。
+ */
 async function readPrototypeGuides(config) {
   const files = await listFiles(config.prototypeDir, ['.md'])
   const guides = []
@@ -64,6 +67,10 @@ async function readPrototypeGuides(config) {
   return guides.filter((guide) => guide.entries.length > 0)
 }
 
+/**
+ * 建立跨頁面的 API catalog。
+ * scan 不直接呼叫後端，只從 markdown/OpenAPI 文件抽取 endpoint、schema 與錯誤格式作為可追溯 evidence。
+ */
 async function readApiCatalog(config) {
   const documents = []
   for (const docsDir of config.backendDocsDirs ?? [config.backendDocsDir]) {
@@ -78,6 +85,10 @@ async function readApiCatalog(config) {
   return buildApiCatalog(documents)
 }
 
+/**
+ * 將 app map、API match 與 prototype guide 回填到每頁 spec。
+ * 這個階段必須在所有頁面初步 scan 完後執行，因為 route/module 判斷依賴跨頁面 app map。
+ */
 function enrichSpecsWithRouteContracts(layoutSpecs, appMap, apiCatalog, prototypeDir) {
   const routeByPrototype = new Map(appMap.routes.map((route) => [route.prototype, route]))
   for (const spec of layoutSpecs) {
@@ -119,6 +130,10 @@ function shouldMatchApi(route) {
   return ['auth', 'auth-support', 'feature-page'].includes(route.kind)
 }
 
+/**
+ * 建立單頁 scan plan 與 cache key。
+ * cache 命中時會沿用 browser capture artifacts，但仍重新產生 contract，讓推論邏輯更新可重跑。
+ */
 async function prepareScanFile(config, file) {
   const hash = await sha256File(file)
   const name = artifactPath(config.prototypeDir, file)
@@ -129,6 +144,10 @@ async function prepareScanFile(config, file) {
   return { file, hash, name, cacheDir, metadataPath, cacheHit }
 }
 
+/**
+ * 掃描單一 HTML 並產出頁面級 spec。
+ * browser capture 負責 runtime evidence；source HTML 負責 deterministic fallback，兩者會在 page contract 中合併。
+ */
 async function scanFile(config, plan, serverUrl) {
   const { file, hash, name, cacheDir, metadataPath, cacheHit } = plan
   const html = await readFile(file, 'utf8')
@@ -160,6 +179,16 @@ async function scanFile(config, plan, serverUrl) {
     hash,
     generatedAt: new Date().toISOString(),
     page: basename(file),
+    captureArtifacts: {
+      screenshots: capture.screenshots,
+      domSummary: join(cacheDir, 'dom-summary.json'),
+      accessibilityTree: join(cacheDir, 'accessibility-tree.json'),
+      metadata: metadataPath
+    },
+    browserEvidence: {
+      externalResourceFailures: capture.externalResourceFailures ?? [],
+      consoleMessages: capture.consoleMessages ?? []
+    },
     pageContract,
     regions: regionSpecs,
     validation: validationReport
@@ -171,6 +200,10 @@ async function scanFile(config, plan, serverUrl) {
   return layoutSpec
 }
 
+/**
+ * 透過 Vite 與 Playwright CLI 擷取 rendered prototype。
+ * 回傳值會同時寫成 cache artifacts，並保留 resource failure 與 console warning/error 供後續人工判讀。
+ */
 async function captureRenderedPrototype(config, plan, serverUrl) {
   if (!serverUrl) throw new Error('Stage 1 capture 需要啟動 prototype static server')
   const resolved = await resolvePlaywrightCli(config.cwd)
@@ -226,6 +259,10 @@ async function captureRenderedPrototype(config, plan, serverUrl) {
   }
 }
 
+/**
+ * 建立 Playwright CLI 執行的頁面擷取程式。
+ * 這段字串刻意集中處理 rendered DOM evidence，讓 source HTML 與實際瀏覽器狀態的差異能被 capture artifacts 保留下來。
+ */
 function captureScript(url, viewport, state, screenshotPath) {
   return `async page => {
     const requestFailures = [];
@@ -271,6 +308,31 @@ function captureScript(url, viewport, state, screenshotPath) {
         .map(element => text(element) || element.value || attr(element, 'aria-label') || attr(element, 'title') || '')
         .filter(Boolean);
       const labels = Array.from(document.querySelectorAll('label')).map(text).filter(Boolean);
+      const controlLabel = element => {
+        const id = attr(element, 'id');
+        const byFor = id ? document.querySelector('label[for="' + CSS.escape(id) + '"]') : null;
+        if (byFor && text(byFor)) return text(byFor);
+        const labelledBy = (attr(element, 'aria-labelledby') || '').split(/\\s+/).filter(Boolean)
+          .map(id => document.getElementById(id))
+          .map(item => item ? text(item) : '')
+          .filter(Boolean)
+          .join(' ');
+        if (labelledBy) return labelledBy;
+        const wrappingLabel = element.closest('label');
+        if (wrappingLabel && text(wrappingLabel)) return text(wrappingLabel);
+        const aria = attr(element, 'aria-label');
+        if (aria) return aria;
+        const row = element.closest('tr');
+        if (row) {
+          const cells = Array.from(row.children);
+          const index = cells.findIndex(cell => cell.contains(element));
+          for (let i = index - 1; i >= 0; i -= 1) {
+            const label = text(cells[i]).replace(/[:：]$/, '');
+            if (label) return label;
+          }
+        }
+        return attr(element, 'placeholder') || attr(element, 'name') || attr(element, 'id') || '';
+      };
       const bbox = element => {
         const rect = element.getBoundingClientRect();
         if (rect.width <= 0 || rect.height <= 0) return null;
@@ -282,9 +344,15 @@ function captureScript(url, viewport, state, screenshotPath) {
       };
       const inputs = Array.from(document.querySelectorAll('input, select, textarea')).map(element => ({
         tag: element.tagName.toLowerCase(),
-        type: attr(element, 'type'),
+        type: attr(element, 'type') || element.tagName.toLowerCase(),
         name: attr(element, 'name') || attr(element, 'id'),
+        label: controlLabel(element),
         required: element.required,
+        readonly: element.readOnly,
+        disabled: element.disabled,
+        maxLength: element.maxLength > 0 ? String(element.maxLength) : null,
+        options: element.tagName.toLowerCase() === 'select' ? Array.from(element.options).map(option => text(option)).filter(Boolean) : [],
+        defaultValue: element.value || null,
         bbox: bbox(element)
       }));
       const boxes = selector => Array.from(document.querySelectorAll(selector)).map((element, index) => ({
@@ -316,7 +384,7 @@ function captureScript(url, viewport, state, screenshotPath) {
         sections: sectionEvidence,
         formRows: Array.from(document.querySelectorAll('tr, .row, form > div, fieldset')).map((element, index) => ({
           id: 'form-row-' + (index + 1),
-          fields: Array.from(element.querySelectorAll('input, select, textarea')).map(field => ({ name: attr(field, 'name') || attr(field, 'id'), label: attr(field, 'aria-label') || attr(field, 'placeholder') || '', type: attr(field, 'type') || field.tagName.toLowerCase(), bbox: bbox(field) })).filter(field => field.bbox),
+          fields: Array.from(element.querySelectorAll('input, select, textarea')).map(field => ({ name: attr(field, 'name') || attr(field, 'id'), label: controlLabel(field), type: attr(field, 'type') || field.tagName.toLowerCase(), bbox: bbox(field) })).filter(field => field.bbox),
           bbox: bbox(element)
         })).filter(row => row.fields.length > 0),
         tables: tableEvidence,
@@ -471,6 +539,10 @@ function validateSpecs(specs, pageContract, domSummary) {
   }
 }
 
+/**
+ * 產生人工 review 用的 UI contract Markdown。
+ * JSON spec 是機器可讀來源；這份 Markdown 只摘要最關鍵的 UI、BDD、browser 與 API evidence。
+ */
 function renderUiContract(spec) {
   const lines = [`# UI Contract: ${spec.page}`, '']
   const contract = spec.pageContract
@@ -545,10 +617,29 @@ function renderUiContract(spec) {
   for (const scenario of spec.bddContract?.scenarios ?? []) {
     lines.push(`- ${scenario.type}: ${scenario.name}`)
   }
+  if (spec.bddContract?.candidateScenarios?.length) lines.push(`- Candidate scenarios: ${spec.bddContract.candidateScenarios.length}`)
+  if (spec.bddContract?.uncoveredEvidence?.length) lines.push(`- Uncovered evidence: ${spec.bddContract.uncoveredEvidence.length}`)
   if (spec.bddContract?.warnings?.length) {
     lines.push(`- Requires human review: ${spec.bddContract.requiresHumanReview ? 'yes' : 'no'}`)
   }
   lines.push('')
+  lines.push('## Capture Artifacts', '')
+  if (!spec.captureArtifacts) lines.push('- none')
+  else {
+    lines.push(`- DOM summary: ${spec.captureArtifacts.domSummary}`)
+    lines.push(`- Accessibility tree: ${spec.captureArtifacts.accessibilityTree}`)
+    lines.push(`- Metadata: ${spec.captureArtifacts.metadata}`)
+    lines.push(`- Screenshots: ${(spec.captureArtifacts.screenshots ?? []).map((item) => `${item.viewport}/${item.state}`).join(', ') || 'none'}`)
+  }
+  lines.push('')
+  lines.push('## Browser Evidence', '')
+  const resourceFailures = spec.browserEvidence?.externalResourceFailures ?? []
+  const consoleMessages = spec.browserEvidence?.consoleMessages ?? []
+  lines.push(`- Resource failures: ${resourceFailures.length}`)
+  for (const failure of resourceFailures.slice(0, 5)) lines.push(`  - ${failure.status ?? failure.reason}: ${failure.url}`)
+  lines.push(`- Console warnings/errors: ${consoleMessages.length}`)
+  for (const message of consoleMessages.slice(0, 5)) lines.push(`  - ${message.type}: ${message.text}`)
+  lines.push('')
   lines.push('## API Endpoints', '')
   if (!spec.apiContract?.endpoints?.length) lines.push('- none')
   for (const endpoint of spec.apiContract?.endpoints ?? []) {
diff --git a/test/cli-e2e.test.js b/test/cli-e2e.test.js
index a109887..48845ec 100644
--- a/test/cli-e2e.test.js
+++ b/test/cli-e2e.test.js
@@ -43,12 +43,17 @@ test('CLI runs doctor and scan against one prototype', async () => {
   assert.match(doctor.stdout, /ok prototype directory/)
   assert.match(contract, /Customer Portal/)
   assert.match(contract, /BDD Scenarios/)
+  assert.match(contract, /Capture Artifacts/)
+  assert.match(contract, /Browser Evidence/)
   assert.match(bdd, /Feature: Customer portal entry/)
   assert.match(bdd, /Scenario: 使用者填寫必要資料並送出成功/)
   assert.doesNotMatch(contract, /Recommended template/)
   assert.equal(spec.pageContract.title, null)
   assert.equal(spec.bddContract.feature, 'Customer portal entry')
   assert.equal(spec.bddContract.scenarios[0].type, 'application-submit')
+  assert.match(spec.captureArtifacts.domSummary, /\.ht\/cache\/prototype\/index\/dom-summary\.json$/)
+  assert.match(spec.captureArtifacts.accessibilityTree, /\.ht\/cache\/prototype\/index\/accessibility-tree\.json$/)
+  assert.equal(Array.isArray(spec.browserEvidence.externalResourceFailures), true)
   assert.deepEqual(pick(spec.pageContract.forms[0].fields[0], ['name', 'label', 'type', 'required']), {
     name: 'email',
     label: 'Email',
diff --git a/test/html.test.js b/test/html.test.js
index 8e1ca58..99abe9a 100644
--- a/test/html.test.js
+++ b/test/html.test.js
@@ -512,7 +512,7 @@ test('buildBddContract reports scenario candidates and uncovered evidence', () =
   }
   spec.prototypeGuide = {
     description: '使用者登入',
-    checklist: ['登入失敗時顯示錯誤訊息', '連續錯誤三次鎖定帳號'],
+    checklist: ['登入失敗時顯示錯誤訊息', '連續錯誤三次鎖定帳號', '支援外部 SSO 導向'],
     flowRefs: [{ title: '登入失敗流程', nodes: [{ nodeType: 'error', action: '顯示錯誤訊息' }] }]
   }
   spec.apiContract = {
@@ -524,14 +524,37 @@ test('buildBddContract reports scenario candidates and uncovered evidence', () =
   const markdown = renderBddContract(spec, contract)
 
   assert.ok(contract.candidateScenarios.some((candidate) => candidate.type === 'error-path'))
+  assert.ok(contract.candidateScenarios.some((candidate) => candidate.source === 'prototypeGuide.checklist' && candidate.evidenceText === '登入失敗時顯示錯誤訊息'))
   assert.ok(contract.candidateScenarios.some((candidate) => candidate.source === 'api-error'))
-  assert.ok(contract.uncoveredEvidence.some((item) => item.source === 'prototypeGuide.checklist' && item.text === '連續錯誤三次鎖定帳號'))
+  assert.ok(contract.uncoveredEvidence.some((item) => item.source === 'prototypeGuide.checklist' && item.text === '支援外部 SSO 導向'))
+  assert.ok(!contract.uncoveredEvidence.some((item) => item.text === '登入失敗時顯示錯誤訊息'))
   assert.ok(contract.uncoveredEvidence.some((item) => item.source === 'pageContract.actions' && item.text === '忘記密碼'))
   assert.equal(contract.requiresHumanReview, true)
   assert.match(markdown, /## Candidate Scenarios/)
   assert.match(markdown, /登入失敗時顯示錯誤訊息/)
   assert.match(markdown, /## Uncovered Evidence/)
-  assert.match(markdown, /連續錯誤三次鎖定帳號/)
+  assert.match(markdown, /支援外部 SSO 導向/)
+})
+
+test('buildPageContract prefers meaningful rendered labels over fallback control names', () => {
+  const contract = buildPageContract({
+    page: 'dynamic-form.html',
+    source: '/repo/prototype/dynamic-form.html',
+    html: '<main><input id="email"></main>',
+    regions: extractRegions('<main><input id="email"></main>'),
+    domSummary: {
+      title: null,
+      headings: [],
+      buttons: [],
+      labels: ['Email'],
+      inputs: [{ tag: 'input', type: 'text', name: 'email', label: 'Email', required: true }],
+      textSamples: ['Email']
+    },
+    screenshotPath: null
+  })
+
+  assert.equal(contract.forms[0].fields[0].label, 'Email')
+  assert.equal(contract.forms[0].fields[0].required, true)
 })
 
 function buildSpec(source, html) {