feat(models): enable Kimi k2 ⇄ Claude trajectory handoff (#1525)

packages/opencode/src/provider/transform.ts

@@ -1,9 +1,26 @@
 import type { ModelMessage } from "ai"
 import { unique } from "remeda"
 
+
 export namespace ProviderTransform {
-  export function message(msgs: ModelMessage[], providerID: string, modelID: string) {
+  function normalizeToolCallIds(msgs: ModelMessage[]): ModelMessage[] {
-    if (providerID === "anthropic" || modelID.includes("anthropic") || modelID.includes("claude")) {
+    return msgs.map((msg) => {
+      if ((msg.role === "assistant" || msg.role === "tool") && Array.isArray(msg.content)) {
+        msg.content = msg.content.map((part) => {
+          if ((part.type === "tool-call" || part.type === "tool-result") && "toolCallId" in part) {
+            return {
+              ...part,
+              toolCallId: part.toolCallId.replace(/[^a-zA-Z0-9_-]/g, '_')
+            }
+          }
+          return part
+        })
+      }
+      return msg
+    })
+  }
+
+  function applyCaching(msgs: ModelMessage[], providerID: string): ModelMessage[] {
     const system = msgs.filter((msg) => msg.role === "system").slice(0, 2)
     const final = msgs.filter((msg) => msg.role !== "system").slice(-2)
 
@@ -42,7 +59,18 @@ export namespace ProviderTransform {
         ...providerOptions,
       }
     }
+
+    return msgs
   }
+
+  export function message(msgs: ModelMessage[], providerID: string, modelID: string) {
+    if (modelID.includes("claude")) {
+      msgs = normalizeToolCallIds(msgs)
+    }
+    if (providerID === "anthropic" || modelID.includes("anthropic") || modelID.includes("claude")) {
+      msgs = applyCaching(msgs, providerID)
+    }
+    
     return msgs
   }
 
@@ -50,9 +78,4 @@ export namespace ProviderTransform {
     if (modelID.toLowerCase().includes("qwen")) return 0.55
     return 0
   }
-
-  export function topP(_providerID: string, modelID: string) {
-    if (modelID.toLowerCase().includes("qwen")) return 1
-    return undefined
-  }
 }