hack to return tool call errors back to model

packages/opencode/src/session/index.ts

@@ -13,6 +13,7 @@ import {
   type ModelMessage,
   stepCountIs,
   type StreamTextResult,
+  InvalidToolInputError,
 } from "ai"
 
 import PROMPT_INITIALIZE from "../session/prompt/initialize.txt"
@@ -869,7 +870,21 @@ export namespace Session {
           messages,
         }
       },
+      async experimental_repairToolCall(input) {
+        if (InvalidToolInputError.isInstance(input.error)) {
+          return {
+            ...input.toolCall,
+            input: JSON.stringify({
+              tool: input.toolCall.toolName,
+              error: input.error.message,
+            }),
+            toolName: "invalid",
+          }
+        }
+        return null
+      },
       maxRetries: 3,
+      activeTools: Object.keys(tools).filter((x) => x !== "invalid"),
       maxOutputTokens: outputLimit,
       abortSignal: abort.signal,
       stopWhen: stepCountIs(1000),
@@ -962,6 +977,7 @@ export namespace Session {
                 if (match) {
                   const part = await updatePart({
                     ...match,
+                    tool: value.toolName,
                     state: {
                       status: "running",
                       input: value.input,