Phase 5 Batch 1: executor + list_clusters + spark_submit + /mcp 路由
- internal/executor: spark-submit 进程执行, exec.Command 切片形式
(绝不 shell) + stdout 10MiB tail-cap + app_id regex
+ 5 个单测覆盖 slice-form 注入防御 + 退出码
- internal/mcp/server.go: NewServer + Streamable HTTP Handler
- internal/mcp/tools/{list_clusters, spark_submit, deps, helpers}.go
- mcp-go API 实测修正: WithArray 用 Items() 声明 item 类型;
StreamableHTTPServer 直接实现 http.Handler, 无 .Handler() 方法
- main.go: 挂 /mcp 路由 (AgentAuth + mcpHandler 手动组合)
Co-Authored-By: Claude <noreply@anthropic.com>
