修复策划 Agent 模型选择链路

保存策划会话的模型目录 ID并交由 api-server 解析

移除官方直连路径的固定模型并补齐 AGC 客户端标记

apps/ai-game-creator-shell/src-tauri/src/agent/design_runtime.rs

@@ -490,6 +490,9 @@ async fn request_design_provider(
     }
     let config = load_game_creator_app_config()?;
     let mut llm = resolve_game_creator_llm_config_for_agent(&config, "design-agent");
+    if !session.model_id.trim().is_empty() {
+        llm.model = session.model_id.clone();
+    }
     // 此循环统一处理流中断与 HTTP 瞬态错误，避免与传输重试相乘。
     let max_retries = llm.max_retries;
     llm.max_retries = 0;
@@ -761,7 +764,10 @@ pub(crate) async fn continue_design_agent_at(
             if read_planning_session_v2(root)?.is_some() {
                 return Err("此项目包含旧策划会话，请查看原有记录或在新项目开始五阶段策划".into());
             }
-            new_design_session(&project_id)
+            new_design_session(
+                &project_id,
+                &load_game_creator_app_config()?.selected_model_id,
+            )
         }
     };
     if session.project_id != project_id {
@@ -940,7 +946,7 @@ mod tests {
         let temp = tempfile::tempdir().expect("tempdir");
         let root = temp.path();
         concept_artifacts(root);
-        let mut session = new_design_session("project");
+        let mut session = new_design_session("project", "quality");
         session.turn = Some(DesignTurn {
             id: "turn-1".into(),
             pending: true,
@@ -987,7 +993,7 @@ mod tests {
 
     #[test]
     fn text_cannot_approve_without_event() {
-        let mut session = new_design_session("project");
+        let mut session = new_design_session("project", "quality");
         let err = prepare_design_input(
             &mut session,
             "turn-1",

apps/ai-game-creator-shell/src-tauri/src/agent/design_tools.rs

@@ -653,7 +653,7 @@ mod tests {
     #[test]
     fn phase_context_injects_current_skill_only() {
         let resources = DesignResources::new(pack_root()).expect("pack");
-        let mut session = new_design_session("project");
+        let mut session = new_design_session("project", "quality");
         let concept = resources.phase_context(&session);
         assert!(concept.contains("skills.concept"));
         assert!(!concept.contains("skills.top_design"));
@@ -677,7 +677,7 @@ mod tests {
         copy_dir(&pack_root(), &dest).expect("copy pack");
         fs::remove_file(dest.join("resources/skills/concept.md")).expect("remove");
         let resources = DesignResources::new(dest).expect("pack without concept skill");
-        let session = new_design_session("project");
+        let session = new_design_session("project", "quality");
         let context = resources.phase_context(&session);
         assert!(!context.contains("skills.concept"));
         assert!(context.contains("project/00_concept/design.md"));

apps/ai-game-creator-shell/src-tauri/src/agent/runtime_protocol/design_session.rs

@@ -45,6 +45,9 @@ pub(crate) struct DesignSession {
     pub(crate) engine: String,
     pub(crate) session_id: String,
     pub(crate) project_id: String,
+    /// 入口选择的 AGC 模型目录 ID；同一会话内保持稳定，不保存上游真实模型名。
+    #[serde(default)]
+    pub(crate) model_id: String,
     pub(crate) current_phase: String,
     #[serde(default)]
     pub(crate) approved_phases: Vec<String>,
@@ -130,13 +133,17 @@ pub(crate) fn design_phase_required_artifacts() -> BTreeMap<String, Vec<String>>
     ])
 }
 
-pub(crate) fn new_design_session(project_id: impl Into<String>) -> DesignSession {
+pub(crate) fn new_design_session(
+    project_id: impl Into<String>,
+    model_id: impl Into<String>,
+) -> DesignSession {
     let now = unix_timestamp();
     DesignSession {
         schema_version: DESIGN_SESSION_SCHEMA_VERSION.to_string(),
         engine: DESIGN_SESSION_ENGINE.to_string(),
         session_id: Uuid::new_v4().to_string(),
         project_id: project_id.into(),
+        model_id: model_id.into(),
         current_phase: DESIGN_PHASES[0].to_string(),
         approved_phases: Vec::new(),
         pending_approval: None,
@@ -214,7 +221,7 @@ pub(crate) fn ensure_design_session(
         }
         return Ok(session);
     }
-    let session = new_design_session(project_id.to_string());
+    let session = new_design_session(project_id.to_string(), "quality");
     write_design_session(root, &session)?;
     Ok(session)
 }
@@ -321,7 +328,7 @@ mod tests {
     #[test]
     fn phase_artifact_check_includes_previous_phases() {
         let root = tempfile::tempdir().expect("tempdir");
-        let mut session = new_design_session("project");
+        let mut session = new_design_session("project", "quality");
         fs::create_dir_all(root.path().join(".workspace/project/00_concept")).expect("mkdir");
         fs::write(
             root.path().join(".workspace/project/00_concept/design.md"),
@@ -347,7 +354,7 @@ mod tests {
     #[test]
     fn rejecting_approval_keeps_phase_and_clears_request() {
         let root = tempfile::tempdir().expect("tempdir");
-        let mut session = new_design_session("project");
+        let mut session = new_design_session("project", "quality");
         fs::create_dir_all(root.path().join(".workspace/project/00_concept")).expect("mkdir");
         fs::write(
             root.path().join(".workspace/project/00_concept/design.md"),

apps/ai-game-creator-shell/src-tauri/src/config.rs

@@ -93,7 +93,6 @@ fn user_selected_path_is_authorized(path: &Path, is_directory: bool) -> bool {
 }
 
 pub(crate) const OFFICIAL_LLM_ROUTER_BASE_URL: &str = "https://router.genarrative.world/v1";
-pub(crate) const OFFICIAL_LLM_ROUTER_MODEL: &str = "gpt-6-astra";
 
 pub(crate) const GAME_CREATOR_LLM_AGENT_REASONING_EFFORT_DEFAULTS: [(&str, &str); 21] = [
     (GAME_CREATOR_PROJECT_SUPERVISOR_AGENT_ID, "high"),
@@ -208,11 +207,12 @@ fn build_game_creator_official_platform_llm_config(
         LlmProvider::OpenAiCompatible,
         proxy_base_url,
         session.access_token,
-        OFFICIAL_LLM_ROUTER_MODEL.to_string(),
+        llm.model.clone(),
         llm.request_timeout_ms,
         llm.max_retries,
         llm.retry_backoff_ms,
     )
+    .map(|config| config.with_agc_client_marker(true))
     .map_err(|error| format!("官方 LLM Router 代理配置无效：{error}"))
 }
 

docs/technical/【技术方案】策划Agent生产迁移与工作区浏览-2026-09-10.md

@@ -113,6 +113,8 @@ Runtime 不维护文档版本号，不解析文档版本，不提供版本回退
 
 会话/回合/工具调用身份用于生产恢复和重复请求处理，与 Agent 自行写在策划文档头部的版本号无关。
 
+策划会话在创建时保存入口选择的 AGC 模型目录 ID（例如 `quality`、`fast`），同一会话后续回合沿用该 ID；客户端不保存或推断上游真实模型名。官方 `platform-llm` 直连 api-server 时携带 AGC 客户端标记，由 api-server 根据模型目录解析实际模型，不能在客户端硬编码某个上游模型替代目录选择。
+
 ## 5. Agent Runtime
 
 新的 Runtime 应提供自由工具循环：

server-rs/crates/platform-llm/src/lib.rs

@@ -73,6 +73,7 @@ pub struct LlmConfig {
     max_retries: u32,
     retry_backoff_ms: u64,
     official_fallback: bool,
+    agc_client_marker: bool,
     anthropic_strict_tool_support: bool,
     openai_chat_token_budget_field: OpenAiChatTokenBudgetField,
 }
@@ -1061,6 +1062,7 @@ impl LlmConfig {
             max_retries,
             retry_backoff_ms,
             official_fallback: false,
+            agc_client_marker: false,
             anthropic_strict_tool_support: false,
             openai_chat_token_budget_field: OpenAiChatTokenBudgetField::LegacyMaxTokens,
         })
@@ -1071,6 +1073,12 @@ impl LlmConfig {
         self
     }
 
+    /// 标记为 AGC 主站客户端请求，使 api-server 按客户端传入的模型目录 ID 解析模型。
+    pub fn with_agc_client_marker(mut self, enabled: bool) -> Self {
+        self.agc_client_marker = enabled;
+        self
+    }
+
     /// 显式声明当前 Anthropic endpoint 与 model 组合支持 strict tool use。
     ///
     /// 该能力不能由 `api_kind` 推断：旧 Claude 模型和 Anthropic-compatible
@@ -1955,6 +1963,9 @@ impl LlmClient {
             );
 
             let mut request_builder = self.http_client.post(url.as_str());
+            if self.config.agc_client_marker {
+                request_builder = request_builder.header("x-genarrative-client", "agc");
+            }
             request_builder = match request.api_kind {
                 LlmApiKind::OpenAiChat | LlmApiKind::OpenAiResponses => {
                     request_builder.bearer_auth(self.config.api_key())