diff --git a/.gitignore b/.gitignore
index 6f22d20..1357140 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,3 +27,5 @@ tools/conan2/
 .vscode/
 .idea/
 *.user
+config.toml
+*.local.toml
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4d359f7..068e699 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,7 +6,17 @@ set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
+option(DSTALK_BUILD_GUI "Build the SDL3 GUI frontend" ON)
+option(DSTALK_BUILD_TESTS "Build dstalk tests" ON)
+
 add_subdirectory(dstalk-core)
 add_subdirectory(dstalk-cli)
-# add_subdirectory(dstalk-gui)  # 等 SDL3 Conan 包可用后启用
-# add_subdirectory(tests)  # TODO: 引入测试框架后启用
+
+if(DSTALK_BUILD_GUI)
+    add_subdirectory(dstalk-gui)
+endif()
+
+if(DSTALK_BUILD_TESTS)
+    enable_testing()
+    add_subdirectory(tests)
+endif()
diff --git a/README.md b/README.md
index 528102a..379e5d8 100644
--- a/README.md
+++ b/README.md
@@ -98,7 +98,7 @@ build.bat       # 一键: Conan拉依赖 → CMake配置 → Ninja编译
 
 ```bash
 build/dstalk-cli/dstalk-cli.exe    # 命令行模式
-build/dstalk-gui/dstalk-gui.exe    # 图形模式
+build/dstalk-gui/dstalk-gui.exe    # 图形模式（默认启用，可用 -DDSTALK_BUILD_GUI=OFF 关闭）
 ```
 
 ---
@@ -144,20 +144,23 @@ $ dstalk-cli
 
   [dstalk] 已更新 csv_avg.c——跳过第一行表头，增加列选择功能。
 
-> /edit csv_avg.c:15 把 atof 改成 strtod
+> /file show csv_avg.c
 
-  [dstalk] 已应用修改。
+  [dstalk] 已显示 csv_avg.c 内容。
 ```
 
 ### 常用命令
 
 | 命令 | 说明 |
 |------|------|
-| `/file list` | 列出当前会话关联的文件 |
-| `/file show <path>` | 查看文件内容（语法高亮） |
-| `/edit <path>:<line> <描述>` | 让 AI 修改指定位置 |
-| `/model` | 切换 AI 模型 |
+| `/file list [path]` | 列出目录内容 |
+| `/file show <path>` | 查看文件内容 |
+| `/file read <path>` | 读取文件内容 |
+| `/file write <path> <content>` | 写入文件 |
+| `/model <name>` | 切换 AI 模型 |
 | `/clear` | 清空会话上下文 |
+| `/save <path>` | 保存会话 |
+| `/load <path>` | 恢复会话 |
 | `/help` | 显示帮助 |
 
 ---
@@ -165,7 +168,7 @@ $ dstalk-cli
 ## 工程结构
 
 ```text
-dstalk2026/
+dstalk/
 ├── deps/
 │   └── conanfile.txt               # Conan2 依赖声明
 ├── dstalk-core/                    # 核心 DLL
@@ -252,7 +255,7 @@ A: 主要支持 DeepSeek V4，同时兼容 OpenAI GPT 系列和 Anthropic Claude
 A: CLI 适合终端/SSH/CI 环境，GUI 适合需要富文本和鼠标交互的场景。两者共享同一核心 DLL，功能一致。
 
 **Q: 如何配置 API Key？**
-A: 首次运行提示输入，或手动创建 `~/.config/dstalk/config.toml`：
+A: 首次运行前，手动创建项目目录下的 `config.toml`：
 
 ```toml
 [api]
@@ -268,9 +271,9 @@ model = "deepseek-v4"
 
 | 阶段 | 内容 |
 |------|------|
-| **Phase 1** (当前) | 项目骨架、CMake 构建、DLL 导出、前端主循环 |
+| **Phase 1** | 项目骨架、CMake 构建、DLL 导出、CLI 前端主循环 |
 | **Phase 2** | HTTPS 网络层、DeepSeek API 对接、基本对话 |
-| **Phase 3** | 流式输出、多轮会话、文件读写工具、CLI 体验对齐 |
+| **Phase 3** (当前) | 流式输出、多轮会话、文件读写工具、CLI 体验对齐 |
 | **Phase 4** | SDL3 GUI 完善、插件系统、LSP 集成 |
 
 ---
diff --git a/deps/conanfile.txt b/deps/conanfile.txt
index ef50fa6..4a4522d 100644
--- a/deps/conanfile.txt
+++ b/deps/conanfile.txt
@@ -1,6 +1,7 @@
 [requires]
 boost/1.86.0
 openssl/3.4.1
+sdl/3.2.10
 
 [generators]
 CMakeDeps
diff --git a/dstalk-cli/CMakeLists.txt b/dstalk-cli/CMakeLists.txt
index 35ad2af..b3b18c8 100644
--- a/dstalk-cli/CMakeLists.txt
+++ b/dstalk-cli/CMakeLists.txt
@@ -9,3 +9,9 @@ add_executable(dstalk-cli
 target_link_libraries(dstalk-cli
     PRIVATE dstalk
 )
+
+add_custom_command(TARGET dstalk-cli POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different
+        $<TARGET_FILE:dstalk>
+        $<TARGET_FILE_DIR:dstalk-cli>
+)
diff --git a/dstalk-cli/src/main.cpp b/dstalk-cli/src/main.cpp
index 5db73b4..3de9806 100644
--- a/dstalk-cli/src/main.cpp
+++ b/dstalk-cli/src/main.cpp
@@ -1,7 +1,11 @@
+#include <algorithm>
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
+#include <filesystem>
 #include <string>
+#include <system_error>
+#include <vector>
 
 #ifdef _WIN32
 #include <windows.h>
@@ -36,17 +40,66 @@ static void print_banner()
 static void print_help()
 {
     std::printf("\n%s命令列表:%s\n", CLR_BOLD, CLR_RESET);
-    std::printf("  %s/help%s              显示此帮助\n", CLR_YELLOW, CLR_RESET);
-    std::printf("  %s/quit%s              退出程序\n", CLR_YELLOW, CLR_RESET);
-    std::printf("  %s/clear%s             清空当前会话上下文\n", CLR_YELLOW, CLR_RESET);
-    std::printf("  %s/model <name>%s      切换模型\n", CLR_YELLOW, CLR_RESET);
-    std::printf("  %s/file read <path>%s  读取文件内容\n", CLR_YELLOW, CLR_RESET);
-    std::printf("  %s/file write <p> <c>%s写入文件\n", CLR_YELLOW, CLR_RESET);
-    std::printf("  %s/save <path>%s       保存会话\n", CLR_YELLOW, CLR_RESET);
-    std::printf("  %s/load <path>%s       恢复会话\n", CLR_YELLOW, CLR_RESET);
+    std::printf("  %s/help%s                  显示此帮助\n", CLR_YELLOW, CLR_RESET);
+    std::printf("  %s/quit%s                  退出程序\n", CLR_YELLOW, CLR_RESET);
+    std::printf("  %s/clear%s                 清空当前会话上下文\n", CLR_YELLOW, CLR_RESET);
+    std::printf("  %s/model <name>%s          切换模型\n", CLR_YELLOW, CLR_RESET);
+    std::printf("  %s/file list [path]%s      列出目录内容\n", CLR_YELLOW, CLR_RESET);
+    std::printf("  %s/file show <path>%s      查看文件内容\n", CLR_YELLOW, CLR_RESET);
+    std::printf("  %s/file read <path>%s      读取文件内容\n", CLR_YELLOW, CLR_RESET);
+    std::printf("  %s/file write <p> <c>%s    写入文件\n", CLR_YELLOW, CLR_RESET);
+    std::printf("  %s/save <path>%s           保存会话\n", CLR_YELLOW, CLR_RESET);
+    std::printf("  %s/load <path>%s           恢复会话\n", CLR_YELLOW, CLR_RESET);
     std::printf("\n直接输入问题即可与 AI 对话。\n\n");
 }
 
+static void print_file(const char* path)
+{
+    while (*path == ' ') path++;
+    char* content = nullptr;
+    if (dstalk_file_read(path, &content) == 0 && content) {
+        std::printf("%s--- %s ---%s\n", CLR_DIM, path, CLR_RESET);
+        std::printf("%s\n", content);
+        std::printf(CLR_DIM "--- EOF ---\n" CLR_RESET);
+        dstalk_free_string(content);
+    } else {
+        std::printf(CLR_RED "[ERROR] 无法读取: %s\n" CLR_RESET, path);
+    }
+}
+
+static void list_files(const char* path)
+{
+    while (*path == ' ') path++;
+    std::filesystem::path dir = *path ? std::filesystem::path(path) : std::filesystem::current_path();
+
+    std::error_code ec;
+    if (!std::filesystem::exists(dir, ec) || !std::filesystem::is_directory(dir, ec)) {
+        std::printf(CLR_RED "[ERROR] 不是有效目录: %s\n" CLR_RESET, dir.string().c_str());
+        return;
+    }
+
+    std::vector<std::filesystem::directory_entry> entries;
+    for (const auto& entry : std::filesystem::directory_iterator(dir, ec)) {
+        if (ec) break;
+        entries.push_back(entry);
+    }
+    if (ec) {
+        std::printf(CLR_RED "[ERROR] 无法列出目录: %s\n" CLR_RESET, dir.string().c_str());
+        return;
+    }
+
+    std::sort(entries.begin(), entries.end(), [](const auto& a, const auto& b) {
+        return a.path().filename().string() < b.path().filename().string();
+    });
+
+    std::printf("%s--- %s ---%s\n", CLR_DIM, dir.string().c_str(), CLR_RESET);
+    for (const auto& entry : entries) {
+        std::error_code status_ec;
+        const bool is_dir = entry.is_directory(status_ec);
+        std::printf("  %s%s%s\n", is_dir ? CLR_CYAN : "", entry.path().filename().string().c_str(), is_dir ? "/" CLR_RESET : "");
+    }
+}
+
 static void handle_command(const char* line)
 {
     if (!line || line[0] != '/') return;
@@ -80,19 +133,22 @@ static void handle_command(const char* line)
         return;
     }
 
+    // /file list [path]
+    if (std::strcmp(line, "/file list") == 0 || std::strncmp(line, "/file list ", 11) == 0) {
+        const char* path = line + 10;
+        list_files(path);
+        return;
+    }
+
+    // /file show <path>
+    if (std::strncmp(line, "/file show ", 11) == 0) {
+        print_file(line + 11);
+        return;
+    }
+
     // /file read <path>
     if (std::strncmp(line, "/file read ", 11) == 0) {
-        const char* path = line + 11;
-        while (*path == ' ') path++;
-        char* content = nullptr;
-        if (dstalk_file_read(path, &content) == 0 && content) {
-            std::printf("%s--- %s ---%s\n", CLR_DIM, path, CLR_RESET);
-            std::printf("%s\n", content);
-            std::printf(CLR_DIM "--- EOF ---\n" CLR_RESET);
-            dstalk_free_string(content);
-        } else {
-            std::printf(CLR_RED "[ERROR] 无法读取: %s\n" CLR_RESET, path);
-        }
+        print_file(line + 11);
         return;
     }
 
diff --git a/dstalk-core/CMakeLists.txt b/dstalk-core/CMakeLists.txt
index 02141c4..945592d 100644
--- a/dstalk-core/CMakeLists.txt
+++ b/dstalk-core/CMakeLists.txt
@@ -32,10 +32,3 @@ target_compile_definitions(dstalk
     PRIVATE DSTALK_BUILD_DLL
     INTERFACE DSTALK_USE_DLL
 )
-
-# Windows: 生成 .lib 导入库和 .dll
-if(WIN32)
-    set_target_properties(dstalk PROPERTIES
-        WINDOWS_EXPORT_ALL_SYMBOLS ON
-    )
-endif()
diff --git a/dstalk-core/src/ai/deepseek_api.hpp b/dstalk-core/src/ai/deepseek_api.hpp
index e554c2a..e502a07 100644
--- a/dstalk-core/src/ai/deepseek_api.hpp
+++ b/dstalk-core/src/ai/deepseek_api.hpp
@@ -14,6 +14,7 @@ struct Message {
 
 // API 配置
 struct ApiConfig {
+    std::string provider;       // 默认 "deepseek"
     std::string base_url;       // 默认 "https://api.deepseek.com/v1"
     std::string api_key;
     std::string model;          // 默认 "deepseek-chat"
diff --git a/dstalk-core/src/api.cpp b/dstalk-core/src/api.cpp
index 719820e..59609bd 100644
--- a/dstalk-core/src/api.cpp
+++ b/dstalk-core/src/api.cpp
@@ -19,6 +19,7 @@ dstalk::ai::ApiConfig      g_config;
 std::vector<dstalk::ai::Message> g_history;
 
 // 默认配置
+const char* DEFAULT_PROVIDER = "deepseek";
 const char* DEFAULT_BASE_URL = "https://api.deepseek.com/v1";
 const char* DEFAULT_MODEL    = "deepseek-chat";
 
@@ -79,7 +80,9 @@ void parse_config_file(const char* path)
             val = val.substr(1, val.size() - 2);
 
         if (current_section == "api") {
-            if (key == "api_key" || key == "apikey")
+            if (key == "provider")
+                g_config.provider = val;
+            else if (key == "api_key" || key == "apikey")
                 g_config.api_key = val;
             else if (key == "base_url")
                 g_config.base_url = val;
@@ -98,6 +101,7 @@ DSTALK_API int dstalk_init(const char* config_path)
     if (g_initialized) return -1;
 
     // 设置默认值
+    g_config.provider   = DEFAULT_PROVIDER;
     g_config.base_url   = DEFAULT_BASE_URL;
     g_config.model      = DEFAULT_MODEL;
     g_config.max_tokens = 4096;
diff --git a/dstalk-core/src/net/http_client_win.cpp b/dstalk-core/src/net/http_client_win.cpp
index 64d4950..aadc331 100644
--- a/dstalk-core/src/net/http_client_win.cpp
+++ b/dstalk-core/src/net/http_client_win.cpp
@@ -219,5 +219,5 @@ HttpResponse HttpClient::post_stream(
 
 #else
 // 非 Windows: 需要 Boost.Beast 实现 (编译时会报错提示)
-#  error "Non-Windows HTTP client not implemented yet. Use Boost.Beast version."
+#  error "WinHTTP backend is Windows-only. Use net/http_client.cpp for non-Windows builds."
 #endif
diff --git a/dstalk-gui/CMakeLists.txt b/dstalk-gui/CMakeLists.txt
index 47d8175..9f534eb 100644
--- a/dstalk-gui/CMakeLists.txt
+++ b/dstalk-gui/CMakeLists.txt
@@ -13,3 +13,9 @@ target_link_libraries(dstalk-gui
         dstalk
         SDL3::SDL3
 )
+
+add_custom_command(TARGET dstalk-gui POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different
+        $<TARGET_FILE:dstalk>
+        $<TARGET_FILE_DIR:dstalk-gui>
+)
diff --git a/dstalk-gui/src/main.cpp b/dstalk-gui/src/main.cpp
index fee00e4..c5d9046 100644
--- a/dstalk-gui/src/main.cpp
+++ b/dstalk-gui/src/main.cpp
@@ -35,7 +35,6 @@ int main(int argc, char* argv[])
         return 1;
     }
 
-    /* TODO: 主循环 — SDL 事件处理, UI 渲染, 调用 dstalk_chat */
     bool running = true;
     SDL_Event event;
     while (running) {
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 61861c8..2f1f9ad 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -2,6 +2,18 @@
 # tests — 单元测试
 # ============================================================
 
-# TODO: 引入测试框架后启用
-# enable_testing()
-# add_subdirectory(...)
+add_executable(dstalk-smoke-test
+    smoke_test.cpp
+)
+
+target_link_libraries(dstalk-smoke-test
+    PRIVATE dstalk
+)
+
+add_custom_command(TARGET dstalk-smoke-test POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different
+        $<TARGET_FILE:dstalk>
+        $<TARGET_FILE_DIR:dstalk-smoke-test>
+)
+
+add_test(NAME dstalk-smoke-test COMMAND dstalk-smoke-test)
diff --git a/tests/smoke_test.cpp b/tests/smoke_test.cpp
new file mode 100644
index 0000000..e0388fe
--- /dev/null
+++ b/tests/smoke_test.cpp
@@ -0,0 +1,52 @@
+#include "dstalk/dstalk_api.h"
+
+#include <cstring>
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <string>
+
+int main()
+{
+    const auto dir = std::filesystem::temp_directory_path() / "dstalk-smoke-test";
+    std::filesystem::create_directories(dir);
+
+    const auto config_path = dir / "config.toml";
+    {
+        std::ofstream config(config_path);
+        config << "[api]\n"
+               << "provider = \"deepseek\"\n"
+               << "base_url = \"https://api.deepseek.com/v1\"\n"
+               << "api_key = \"test-key\"\n"
+               << "model = \"deepseek-chat\"\n";
+    }
+
+    if (dstalk_init(config_path.string().c_str()) != 0) {
+        std::cerr << "dstalk_init failed\n";
+        return 1;
+    }
+
+    const auto file_path = dir / "sample.txt";
+    if (dstalk_file_write(file_path.string().c_str(), "hello dstalk") != 0) {
+        std::cerr << "dstalk_file_write failed\n";
+        dstalk_destroy();
+        return 1;
+    }
+
+    char* content = nullptr;
+    if (dstalk_file_read(file_path.string().c_str(), &content) != 0 || !content) {
+        std::cerr << "dstalk_file_read failed\n";
+        dstalk_destroy();
+        return 1;
+    }
+
+    const bool ok = std::strcmp(content, "hello dstalk") == 0;
+    dstalk_free_string(content);
+    dstalk_destroy();
+
+    if (!ok) {
+        std::cerr << "unexpected file content\n";
+        return 1;
+    }
+    return 0;
+}
diff --git a/tools/env.bat b/tools/env.bat
index cc5b33e..330a065 100644
--- a/tools/env.bat
+++ b/tools/env.bat
@@ -8,6 +8,8 @@ set "TOOLS=%~dp0"
 if exist "%TOOLS%cmake\bin"    set "PATH=%TOOLS%cmake\bin;%PATH%"
 if exist "%TOOLS%ninja"        set "PATH=%TOOLS%ninja;%PATH%"
 if exist "%TOOLS%llvm\bin"     set "PATH=%TOOLS%llvm\bin;%PATH%"
+if exist "%TOOLS%llvm\bin\clang.exe" set "CC=%TOOLS%llvm\bin\clang.exe"
+if exist "%TOOLS%llvm\bin\clang++.exe" set "CXX=%TOOLS%llvm\bin\clang++.exe"
 if exist "%TOOLS%conan2"       set "PATH=%TOOLS%conan2;%PATH%"
 
 echo [dstalk] tools\ 工具链已加载
diff --git a/说明.txt b/说明.txt
index 90b63f8..1431179 100644
--- a/说明.txt
+++ b/说明.txt
@@ -52,19 +52,12 @@ cmake,Ninja,llvm,clang,lld
 cmake->ninja->cdll & exe
 
 
-测试1密钥和连接网址：
-sk-DWiHMg4T3cIxWUSwRGtjLuPe1c8FuwM0FiGyoyuNFWGpkhjY
-anthropic或openai api:https://api.ai.pulsareon.com
+测试连接网址：
+openai api:https://api.deepseek.com
+anthropic api:https://api.deepseek.com/anthropic
 
-测试1用的模型：
+测试用模型：
 deepseek-v4-pro
 deepseek-v4-flash
 
-测试2deepseek的网址和密钥：
-anthropic api:https://api.deepseek.com/anthropic
-openai api:https://api.deepseek.com
-sk-fabe6677bbfb4f119b29c54b0150bc0b
-
-测试2用的模型：
-deepseek-v4-pro
-deepseek-v4-flash
\ No newline at end of file
+密钥请通过本地 config.toml 配置，不要提交到仓库。