fix: Claude w/bedrock custom inference profile - caching support (#9838)

Co-authored-by: Aiden Cline <[email protected]>

packages/opencode/src/provider/transform.ts

@@ -248,6 +248,8 @@ export namespace ProviderTransform {
       model.providerID === "anthropic" ||
       model.api.id.includes("anthropic") ||
       model.api.id.includes("claude") ||
+      model.id.includes("anthropic") ||
+      model.id.includes("claude") ||
       model.api.npm === "@ai-sdk/anthropic"
     ) {
       msgs = applyCaching(msgs, model.providerID)

packages/opencode/test/provider/transform.test.ts

@@ -996,6 +996,41 @@ describe("ProviderTransform.message - providerOptions key remapping", () => {
   })
 })
 
+describe("ProviderTransform.message - claude w/bedrock custom inference profile", () => {
+  test("adds cachePoint", () => {
+    const model = {
+      id: "amazon-bedrock/custom-claude-sonnet-4.5",
+      providerID: "amazon-bedrock",
+      api: {
+        id: "arn:aws:bedrock:xxx:yyy:application-inference-profile/zzz",
+        url: "https://api.test.com",
+        npm: "@ai-sdk/amazon-bedrock",
+      },
+      name: "Custom inference profile",
+      capabilities: {},
+      options: {},
+      headers: {},
+    } as any
+
+    const msgs = [
+      {
+        role: "user",
+        content: "Hello",
+      },
+    ] as any[]
+
+    const result = ProviderTransform.message(msgs, model, {})
+
+    expect(result[0].providerOptions?.bedrock).toEqual(
+      expect.objectContaining({
+        cachePoint: {
+          type: "ephemeral",
+        },
+      }),
+    )
+  })
+})
+
 describe("ProviderTransform.variants", () => {
   const createMockModel = (overrides: Partial<any> = {}): any => ({
     id: "test/test-model",

packages/web/src/content/docs/providers.mdx

@@ -229,6 +229,27 @@ To use Amazon Bedrock with OpenCode:
    /models
    ```
 
+:::note
+For custom inference profiles, use the model and provider name in the key and set the `id` property to the arn. This ensures correct caching:
+
+```json title="opencode.json"
+{
+  "$schema": "https://opencode.ai/config.json",
+  "provider": {
+    "amazon-bedrock": {
+      // ...
+      "models": {
+        "anthropic-claude-sonnet-4.5": {
+          "id": "arn:aws:bedrock:us-east-1:xxx:application-inference-profile/yyy"
+        }
+      }
+    }
+  }
+}
+```
+
+:::
+
 ---
 
 ### Anthropic