tripocli v2.0.0：Tripo AI 3D 生成与加工 CLI（面向 Agent 与开发者，纯 Python 标准库、零第三方依赖）

覆盖文生 3D、图生 3D、多视图、批量生成，以及重拓扑、绑定、动画、智能分割、
纹理、PBR、智能 UV、部件补全、格式导出与下载。

代码组织：一个功能一个模块（tripo/features/），入口薄壳 tripocli.py。

tripo/features/export_model.py

@@ -0,0 +1,70 @@
+"""格式转换导出 — convert a model to another format.
+
+    tripocli export -p <project_id> -f fbx --wait -o model.fbx
+
+Export is asynchronous; once it succeeds the result is fetched through
+``download_with_name`` using the *export* operator id.
+"""
+
+import os
+
+from . import _common
+
+NAME = "export"
+HELP = "格式转换导出 (glb/fbx/obj/stl/usdz/3mf)"
+
+FORMATS = ["glb", "fbx", "obj", "stl", "usdz", "3mf"]
+
+
+def add_arguments(parser):
+    parser.add_argument("-p", "--project", required=True, help="项目 ID")
+    parser.add_argument("-f", "--format", required=True, choices=FORMATS, help="目标格式")
+    parser.add_argument("--operator", help="模型 operator_id（默认取项目当前 operator）")
+    parser.add_argument("-n", "--name", help="导出文件名前缀")
+    parser.add_argument("-m", "--model", help="覆盖 model_version（默认取项目自身版本）")
+    _common.add_wait_options(parser, "导出文件保存路径")
+
+
+def run(ctx):
+    args = ctx.args
+    operator_id = args.operator
+    if not operator_id:
+        operator_id = ctx.client.project_operator(args.project).get("operator_id")
+    if not operator_id:
+        raise ValueError(f"无法确定项目 {args.project} 的 operator_id，请用 --operator 指定")
+
+    version = _common.project_version(ctx.client, args.project, args.model) or "default"
+    result = ctx.client.export(
+        args.project, operator_id, args.format, name=args.name or "model", model_version=version
+    ) or {}
+
+    export_operator = result.get("operator_id")
+    if not args.wait:
+        ctx.out.data(
+            result,
+            human=lambda: (
+                ctx.out.line("✅ 导出任务已提交"),
+                ctx.out.line(f"export operator_id : {export_operator}"),
+                ctx.out.line(f"查询进度            : tripocli task status {export_operator}"),
+            ),
+        )
+        return result
+
+    _common.wait_and_report(ctx, export_operator)
+
+    filename = args.output or f"{args.name or 'model'}.{args.format}"
+    url = ctx.client.download_url(export_operator, os.path.basename(filename))
+    output_path = None
+    if url:
+        output_path = os.path.abspath(filename)
+        ctx.client.download(url, output_path)
+
+    payload = {"export": result, "download_url": url, "output_file": output_path}
+    ctx.out.data(
+        payload,
+        human=lambda: (
+            ctx.out.line("🎉 导出完成"),
+            ctx.out.line(f"已保存: {output_path}") if output_path else ctx.out.line("⚠️ 未取到下载直链"),
+        ),
+    )
+    return payload