Class BashTool

src/main/java/org/miniclaudecode/tool/BashTool.java:17–93

s01 唯一真实工具：执行 shell 命令。 本章故意不做权限判断，只保留“模型请求工具 -> Java 执行工具 -> 结果回给模型”的闭环。

 * 本章故意不做权限判断，只保留“模型请求工具 -> Java 执行工具 -> 结果回给模型”的闭环。
 */
public class BashTool implements Tool {

	private final File workdir;

	public BashTool(File workdir) {
		this.workdir = workdir;
	}

	/*
	 * {
	 *   "name": "bash",
	 *   "description": "Run a shell command. Set run_in_background=true for slow commands.",
	 *   "input_schema": {
	 *     "type": "object",
	 *     "properties": {
	 *       "command": {"type": "string", "description": "Shell command to run"},
	 *       "run_in_background": {"type": "boolean", "description": "Run in background for slow commands"}
	 *     },
	 *     "required": ["command"]
	 *   }
	 * }
	 */
	@Override
	public ToolDefinition getDefinition() {
		JSONObject properties = new JSONObject()
				.fluentPut("command", new JSONObject()
						.fluentPut("type", "string")
						.fluentPut("description", "Shell command to run"))
				.fluentPut("run_in_background", new JSONObject()
						.fluentPut("type", "boolean")
						.fluentPut("description", "Run in background for slow commands"));
		JSONObject schema = new JSONObject()
				.fluentPut("type", "object")
				.fluentPut("properties", properties)
				.fluentPut("required", new JSONArray().fluentAdd("command"));
		return new ToolDefinition("bash",
				"Run a shell command. Set run_in_background=true for slow commands.", schema);
	}

	@Override
	public ToolResult execute(JSONObject input) {
		String command = input == null ? "" : input.getString("command");
		if (command == null || command.isBlank()) {
			return new ToolResult("No command provided");
		}

		try {
			// bash 工具的工作目录和 system prompt 中告诉模型的 workdir 保持一致。
			Process process = new ProcessBuilder("/bin/sh", "-c", command)
					.directory(workdir)
					.redirectErrorStream(true)
					.start();
			String output = readOutput(process);
			int exitCode = process.waitFor();
			return new ToolResult("exit_code=" + exitCode + "\n" + output);
		}
		catch (IOException e) {
			return new ToolResult("Command failed to start: " + e.getMessage());