feat: remove OpenCode assistant mode

backend/schemas.py

@@ -9,7 +9,7 @@ from __future__ import annotations
 
 from datetime import UTC, datetime
 import re
-from typing import Annotated, Any, Literal, Union
+from typing import Annotated, Any, Literal, Union, get_args
 
 from pydantic import BaseModel, ConfigDict, Field, field_validator, model_validator
 from pydantic.alias_generators import to_camel
@@ -17,7 +17,8 @@ from pydantic.alias_generators import to_camel
 RuntimeMode = Literal["pipeline", "realtime"]
 VisionPromptMode = Literal["fixed", "runtime", "guided"]
 ModelType = Literal["LLM", "ASR", "TTS", "Realtime", "Embedding", "Agent"]
-AssistantType = Literal["prompt", "workflow", "dify", "fastgpt", "opencode"]
+AssistantType = Literal["prompt", "workflow", "dify", "fastgpt"]
+SUPPORTED_ASSISTANT_TYPES = get_args(AssistantType)
 TurnEndStrategy = Literal["silence", "smart_turn"]
 KnowledgeRetrievalMode = Literal["automatic", "on_demand"]
 ToolType = Literal["http", "mcp", "client"]
@@ -34,7 +35,7 @@ PromptOpeningMode = Literal["interruptible", "playback", "confirmation"]
 PrimitiveValue = str | int | float | bool
 
 # 外部应用类型:其 config.apiKey 是该助手私有密钥,读时打码 / 写时哨兵
-EXTERNAL_TYPES = {"dify", "fastgpt", "opencode"}
+EXTERNAL_TYPES = {"dify", "fastgpt"}
 
 # Prompt 和 Workflow 支持 realtime;外部托管大脑只走 pipeline。
 # 与 services.brains 各 BrainSpec.supported_runtime_modes 对齐(此处独立声明,
@@ -131,7 +132,6 @@ ALLOWED_FIELDS: dict[str, set[str]] = {
     "workflow": {"graph"},
     "dify": {"api_url", "api_key"},
     "fastgpt": {"app_id", "api_url", "api_key"},
-    "opencode": {"prompt", "api_url", "api_key"},
 }