feat(agents): implement Code Commander module (Phases 1-5)

- Phase 1: Infrastructure (state, prompts, registry)
- Phase 2: Execution engine (AI adapters, security classifier, executors)
- Phase 3: Agent integration (graph nodes, routing)
- Phase 4: Streaming interaction (PTY terminal, WebSocket)
- Phase 5: Frontend integration (Vue components)

backend/app/agents/tools/ai_adapter.py

@@ -0,0 +1,196 @@
+"""
+AI CLI Adapter - 统一接口适配不同 AI CLI (Claude/Gemini/Codex/OpenCode)
+"""
+
+from abc import ABC, abstractmethod
+from dataclasses import dataclass, field
+from pathlib import Path
+from typing import Literal
+
+
+@dataclass
+class CodeExecutionResult:
+    """代码执行结果"""
+
+    success: bool
+    message: str
+    files_created: list[str] = field(default_factory=list)
+    output: str = ""
+    error: str | None = None
+    exit_code: int = 0
+
+
+class AICLIAdapter(ABC):
+    """AI CLI 适配器抽象基类"""
+
+    @property
+    @abstractmethod
+    def cli_name(self) -> str:
+        """CLI 命令名称，如 'claude', 'gemini'"""
+        pass
+
+    @property
+    @abstractmethod
+    def requires_workspace(self) -> bool:
+        """是否需要工作目录"""
+        pass
+
+    @property
+    def provider(self) -> Literal["claude", "gemini", "codex", "opencode"]:
+        """AI 提供商标识"""
+        return self.cli_name
+
+    @abstractmethod
+    def build_command(self, prompt: str, workspace: Path | None) -> list[str]:
+        """构建 CLI 命令"""
+        pass
+
+    @abstractmethod
+    def parse_output(self, output: str) -> CodeExecutionResult:
+        """解析 CLI 输出"""
+        pass
+
+    @abstractmethod
+    def is_installed(self) -> bool:
+        """检查 CLI 是否已安装"""
+        pass
+
+
+class ClaudeAdapter(AICLIAdapter):
+    """Claude CLI 适配器"""
+
+    cli_name = "claude"
+    requires_workspace = True
+
+    def build_command(self, prompt: str, workspace: Path | None) -> list[str]:
+        cmd = ["claude", "-p", prompt]
+        if workspace:
+            cmd.extend(["--output-format", "stream-json"])
+        cmd.append("--dangerously-skip-permissions")
+        return cmd
+
+    def parse_output(self, output: str) -> CodeExecutionResult:
+        # Claude CLI 输出可能是纯文本或 JSON
+        # 简化处理：直接返回输出
+        if not output.strip():
+            return CodeExecutionResult(
+                success=False,
+                message="No output from Claude CLI",
+                output=output,
+            )
+        return CodeExecutionResult(
+            success=True,
+            message="Execution completed",
+            output=output,
+        )
+
+    def is_installed(self) -> bool:
+        import shutil
+
+        return shutil.which("claude") is not None
+
+
+class GeminiAdapter(AICLIAdapter):
+    """Gemini CLI 适配器"""
+
+    cli_name = "gemini"
+    requires_workspace = False
+
+    def build_command(self, prompt: str, workspace: Path | None) -> list[str]:
+        cmd = ["gemini", "-p", prompt]
+        return cmd
+
+    def parse_output(self, output: str) -> CodeExecutionResult:
+        if not output.strip():
+            return CodeExecutionResult(
+                success=False,
+                message="No output from Gemini CLI",
+                output=output,
+            )
+        return CodeExecutionResult(
+            success=True,
+            message="Execution completed",
+            output=output,
+        )
+
+    def is_installed(self) -> bool:
+        import shutil
+
+        return shutil.which("gemini") is not None
+
+
+class CodexAdapter(AICLIAdapter):
+    """Codex CLI 适配器"""
+
+    cli_name = "codex"
+    requires_workspace = True
+
+    def build_command(self, prompt: str, workspace: Path | None) -> list[str]:
+        cmd = ["codex", "-p", prompt]
+        return cmd
+
+    def parse_output(self, output: str) -> CodeExecutionResult:
+        if not output.strip():
+            return CodeExecutionResult(
+                success=False,
+                message="No output from Codex CLI",
+                output=output,
+            )
+        return CodeExecutionResult(
+            success=True,
+            message="Execution completed",
+            output=output,
+        )
+
+    def is_installed(self) -> bool:
+        import shutil
+
+        return shutil.which("codex") is not None
+
+
+class OpenCodeAdapter(AICLIAdapter):
+    """OpenCode CLI 适配器"""
+
+    cli_name = "opencode"
+    requires_workspace = True
+
+    def build_command(self, prompt: str, workspace: Path | None) -> list[str]:
+        cmd = ["opencode", "-p", prompt]
+        return cmd
+
+    def parse_output(self, output: str) -> CodeExecutionResult:
+        if not output.strip():
+            return CodeExecutionResult(
+                success=False,
+                message="No output from OpenCode CLI",
+                output=output,
+            )
+        return CodeExecutionResult(
+            success=True,
+            message="Execution completed",
+            output=output,
+        )
+
+    def is_installed(self) -> bool:
+        import shutil
+
+        return shutil.which("opencode") is not None
+
+
+# 提供商注册表
+ADAPTER_REGISTRY: dict[str, AICLIAdapter] = {
+    "claude": ClaudeAdapter(),
+    "gemini": GeminiAdapter(),
+    "codex": CodexAdapter(),
+    "opencode": OpenCodeAdapter(),
+}
+
+
+def get_adapter(provider: str) -> AICLIAdapter:
+    """获取指定提供商的适配器"""
+    adapter = ADAPTER_REGISTRY.get(provider.lower())
+    if adapter is None:
+        raise ValueError(
+            f"Unknown AI provider: {provider}. Available: {list(ADAPTER_REGISTRY.keys())}"
+        )
+    return adapter