Merge pull request #965 from bensonz/main [skip ci]

fix: Bedrock compatibility — 修复了 bedrock 不能用的问题. cache_control sanitization, Opus 4.6 mapping, [1m] suffix stripping

src/services/relay/bedrockRelayService.js

@@ -436,8 +436,15 @@ class BedrockRelayService {
 
   // 将标准Claude模型名映射为Bedrock格式
   _mapToBedrockModel(modelName) {
+    // Strip [1m] suffix (long context variant) — Bedrock uses the same model ID
+    // but supports 1M context natively for models that have it
+    const cleanModelName = modelName.replace(/\[1m\]$/, '')
+
     // 标准Claude模型名到Bedrock模型名的映射表
     const modelMapping = {
+      // Claude Opus 4.6
+      'claude-opus-4-6': 'global.anthropic.claude-opus-4-6-v1',
+
       // Claude 4.5 Opus
       'claude-opus-4-5': 'us.anthropic.claude-opus-4-5-20251101-v1:0',
       'claude-opus-4-5-20251101': 'us.anthropic.claude-opus-4-5-20251101-v1:0',
@@ -482,21 +489,21 @@ class BedrockRelayService {
 
     // 如果已经是Bedrock格式，直接返回
     // Bedrock模型格式：{region}.anthropic.{model-name} 或 anthropic.{model-name}
-    if (modelName.includes('.anthropic.') || modelName.startsWith('anthropic.')) {
-      return modelName
+    if (cleanModelName.includes('.anthropic.') || cleanModelName.startsWith('anthropic.')) {
+      return cleanModelName
     }
 
     // 查找映射
-    const mappedModel = modelMapping[modelName]
+    const mappedModel = modelMapping[cleanModelName]
     if (mappedModel) {
       return mappedModel
     }
 
     // 如果没有找到映射，返回原始模型名（可能会导致错误，但保持向后兼容）
-    logger.warn(`⚠️ 未找到模型映射: ${modelName}，使用原始模型名`, {
+    logger.warn(`⚠️ 未找到模型映射: ${cleanModelName}，使用原始模型名`, {
       metadata: { originalModel: modelName }
     })
-    return modelName
+    return cleanModelName
   }
 
   // 选择使用的区域
@@ -514,6 +521,35 @@ class BedrockRelayService {
     return this.defaultRegion
   }
 
+  // Sanitize cache_control fields for Bedrock compatibility.
+  // Bedrock only supports { type: "ephemeral" } — extra fields like "scope"
+  // (added in Claude Code v2.1.38+) cause ValidationException.
+  _sanitizeCacheControl(obj) {
+    if (obj === null || obj === undefined || typeof obj !== 'object') {
+      return obj
+    }
+
+    if (Array.isArray(obj)) {
+      obj.forEach((item) => this._sanitizeCacheControl(item))
+      return obj
+    }
+
+    if (obj.cache_control && typeof obj.cache_control === 'object') {
+      // Keep only the "type" field that Bedrock accepts
+      obj.cache_control = { type: obj.cache_control.type || 'ephemeral' }
+    }
+
+    // Recurse into known nested structures (messages[].content, tool input_schema, etc.)
+    for (const key of Object.keys(obj)) {
+      const val = obj[key]
+      if (val && typeof val === 'object') {
+        this._sanitizeCacheControl(val)
+      }
+    }
+
+    return obj
+  }
+
   // 转换Claude格式请求到Bedrock格式
   _convertToBedrockFormat(requestBody) {
     const bedrockPayload = {
@@ -553,6 +589,9 @@ class BedrockRelayService {
       bedrockPayload.tool_choice = requestBody.tool_choice
     }
 
+    // Sanitize cache_control for Bedrock compatibility (strip unsupported fields like "scope")
+    this._sanitizeCacheControl(bedrockPayload)
+
     return bedrockPayload
   }