feat: support claude agent SDK-style structured outputs in the OpenCode SDK (#8161)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: Dax Raad <d@ironbay.co>

packages/sdk/js/src/v2/gen/sdk.gen.ts

@@ -57,6 +57,7 @@ import type {
   McpLocalConfig,
   McpRemoteConfig,
   McpStatusResponses,
+  OutputFormat,
   Part as Part2,
   PartDeleteErrors,
   PartDeleteResponses,
@@ -1473,6 +1474,7 @@ export class Session extends HeyApiClient {
       tools?: {
         [key: string]: boolean
       }
+      format?: OutputFormat
       system?: string
       variant?: string
       parts?: Array<TextPartInput | FilePartInput | AgentPartInput | SubtaskPartInput>
@@ -1491,6 +1493,7 @@ export class Session extends HeyApiClient {
             { in: "body", key: "agent" },
             { in: "body", key: "noReply" },
             { in: "body", key: "tools" },
+            { in: "body", key: "format" },
             { in: "body", key: "system" },
             { in: "body", key: "variant" },
             { in: "body", key: "parts" },
@@ -1561,6 +1564,7 @@ export class Session extends HeyApiClient {
       tools?: {
         [key: string]: boolean
       }
+      format?: OutputFormat
       system?: string
       variant?: string
       parts?: Array<TextPartInput | FilePartInput | AgentPartInput | SubtaskPartInput>
@@ -1579,6 +1583,7 @@ export class Session extends HeyApiClient {
             { in: "body", key: "agent" },
             { in: "body", key: "noReply" },
             { in: "body", key: "tools" },
+            { in: "body", key: "format" },
             { in: "body", key: "system" },
             { in: "body", key: "variant" },
             { in: "body", key: "parts" },

packages/sdk/js/src/v2/gen/types.gen.ts

@@ -90,6 +90,22 @@ export type EventFileEdited = {
   }
 }
 
+export type OutputFormatText = {
+  type: "text"
+}
+
+export type JsonSchema = {
+  [key: string]: unknown
+}
+
+export type OutputFormatJsonSchema = {
+  type: "json_schema"
+  schema: JsonSchema
+  retryCount?: number
+}
+
+export type OutputFormat = OutputFormatText | OutputFormatJsonSchema
+
 export type FileDiff = {
   file: string
   before: string
@@ -106,6 +122,7 @@ export type UserMessage = {
   time: {
     created: number
   }
+  format?: OutputFormat
   summary?: {
     title?: string
     body?: string
@@ -152,6 +169,14 @@ export type MessageAbortedError = {
   }
 }
 
+export type StructuredOutputError = {
+  name: "StructuredOutputError"
+  data: {
+    message: string
+    retries: number
+  }
+}
+
 export type ContextOverflowError = {
   name: "ContextOverflowError"
   data: {
@@ -189,6 +214,7 @@ export type AssistantMessage = {
     | UnknownError
     | MessageOutputLengthError
     | MessageAbortedError
+    | StructuredOutputError
     | ContextOverflowError
     | ApiError
   parentID: string
@@ -212,6 +238,7 @@ export type AssistantMessage = {
       write: number
     }
   }
+  structured?: unknown
   variant?: string
   finish?: string
 }
@@ -841,6 +868,7 @@ export type EventSessionError = {
       | UnknownError
       | MessageOutputLengthError
       | MessageAbortedError
+      | StructuredOutputError
       | ContextOverflowError
       | ApiError
   }
@@ -3403,6 +3431,7 @@ export type SessionPromptData = {
     tools?: {
       [key: string]: boolean
     }
+    format?: OutputFormat
     system?: string
     variant?: string
     parts: Array<TextPartInput | FilePartInput | AgentPartInput | SubtaskPartInput>
@@ -3590,6 +3619,7 @@ export type SessionPromptAsyncData = {
     tools?: {
       [key: string]: boolean
     }
+    format?: OutputFormat
     system?: string
     variant?: string
     parts: Array<TextPartInput | FilePartInput | AgentPartInput | SubtaskPartInput>