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brickly-sdk

Brickly Brick Python runtime 官方 SDK。它通过 stdin/stdout 与宿主通信,封装 BPP (Brickly Plugin Protocol),让 Python Brick 可以专注写命令逻辑,而不是手写协议消息。

stdout 会被 SDK 保留给 BPP 协议消息;业务日志请使用 brick.log(...) 写入 stderr。

安装

pip install brickly-sdk==0.1.3

国内环境可以使用 PyPI 镜像:

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple brickly-sdk==0.1.3

快速开始

from brickly import BricklyRuntime

brick = BricklyRuntime("com.example.python")


@brick.on_command("hello")
def hello(ctx, input_value):
    ctx.progress(0.5, "处理中...")
    ctx.chunk("hello\n")
    return {"ok": True, "input": input_value}


brick.run()

SDK 会自动处理:

  • host.hello -> runtime.ready
  • runtime.ping -> runtime.pong
  • command.invoke 命令分发
  • command.cancel 取消信号、ctx.is_cancelled()ctx.on_cancel(...)
  • command.progresscommand.chunkcommand.output
  • host.* 请求 ID 分配,以及 host.result / host.error 路由
  • runtime.shutdown -> 可选 shutdown hook -> runtime.bye
  • 子窗口创建、窗口方法调用、window.* 事件路由
  • 事件总线 events.publish(...) / events.on(...)
  • 跨 Brick 调用 invoke(...)invoke_root(...)invoke_stream(...)
  • 跨 Brick 会话 open_session(...)
  • 平台能力 platform.screenshotplatform.screenplatform.inputplatform.clipboardplatform.system

与 Node SDK 的同步关系

Python SDK 的协议语义与 @syllm/brickly-sdk 保持一致:

  • Python 使用 snake_case 方法名,例如 create_browser_window()set_full_screen()
  • Node 使用 camelCase 方法名,例如 createBrowserWindow()setFullScreen()
  • 两者底层发送的 BPP 消息类型和窗口方法名一致。
  • 当前 BPP 协议版本为 0.2.0;窗口 DTO 和方法 Literal 由 specs/bpp.schema.json 生成。
  • Python 不提供 Node 的 TypeScript CommandMap 类型生成能力;Python 侧依赖类型标注和中文 docstring 提供 IDE 补全。

命令上下文

命令处理函数会收到 CommandContext

@brick.on_command("process")
def process(ctx, input_value):
    ctx.progress(0.2, "准备中")

    if ctx.is_cancelled():
        return {"cancelled": True}

    ctx.output("debug", {"step": "start"})
    ctx.chunk("第一段输出\n")
    return {"ok": True}

常用属性和方法:

  • ctx.request_id:当前请求 ID
  • ctx.command_id:当前命令 ID
  • ctx.invocation:宿主传入的可信调用来源和依赖 Profile 映射
  • ctx.config:当前 Profile 配置快照
  • ctx.ui:子窗口 API
  • ctx.events:事件总线 API
  • ctx.platform:平台能力 API
  • ctx.systemctx.platform.system 的快捷别名
  • ctx.progress(value, message):上报进度
  • ctx.chunk(chunk, name=None):追加流式输出
  • ctx.output(name, value):设置具名输出
  • ctx.invoke(...):在命令作用域内调用另一个 Brick
  • ctx.invoke_stream(...):流式调用另一个 Brick
  • ctx.open_session(...):打开跨 Brick 会话,后续可用 session.invoke(...) / session.invoke_stream(...)

子窗口

from brickly import BricklyRuntime

brick = BricklyRuntime("com.example.window")


@brick.on_command("open")
def open_window(ctx, _input):
    win = ctx.ui.create_browser_window("ui/index.html", {"width": 640, "height": 480})
    win.on("closed", lambda payload: brick.log("窗口已关闭", payload))
    win.set_title("Hello from Python")
    win.web_contents.send("app:hello", {"requestId": ctx.request_id, "text": "你好"})
    return {"windowId": win.id, "windowKey": win.window_key}


brick.run()

WindowHandle 提供与 Node SDK 对齐的常用窗口方法,例如:

  • 几何尺寸:set_bounds()get_bounds()set_position()set_size()
  • 内容区域:set_content_bounds()get_content_bounds()set_content_size()
  • 状态切换:minimize()maximize()restore()show()hide()focus()
  • 状态查询:is_visible()is_focused()is_minimized()is_full_screen()
  • 外观能力:set_title()set_opacity()set_background_color()set_has_shadow()
  • webContents:send()execute_javascript()open_dev_tools()go_back()set_zoom_factor()copy()paste()undo()

关闭是显式生命周期操作:

result = win.close()
if result["status"] in ("pending", "prevented"):
    win.focus()  # 句柄仍可用

termination = win.force_close()
# win.destroy() 是 force_close() 的旧便利名,不走反射 destroy。

close() 返回 closed/prevented/pending/not-found。只有 closed/not-foundwindow.closed 终态事件会把句柄标记为 closed、从 Runtime Map 删除并清空 listener。终态 eventId 有界去重,transport 结束时也会释放全部窗口句柄。

跨 Brick 调用

命令处理函数内部使用 ctx.invoke(...)

result = ctx.invoke(
    "com.brickly.openai",
    "chat",
    {"prompt": "hello"},
    profile_id="work",
)

如果宿主在 ctx.invocation.dependencyProfiles 中给目标 Brick 指定了 Profile,且调用时没有显式传 profile_id,SDK 会自动沿用该 Profile。这一点与 Node SDK 行为一致。

命令处理函数外部需要使用显式 root 调用:

result = brick.invoke_root(
    "com.brickly.openai",
    "chat",
    {"prompt": "hello"},
    profile_id="work",
)

流式调用:

for event in ctx.invoke_stream("com.brickly.openai", "chat", {"prompt": "hello"}):
    if event["type"] == "progress":
        ctx.progress(event.get("progress", 0), event.get("message"))
    elif event["type"] == "chunk":
        ctx.chunk(event.get("chunk"))
    elif event["type"] == "output":
        ctx.output(event["name"], event.get("value"))
    elif event["type"] == "result":
        return event["result"]

跨 Brick 调用需要在调用方 manifest 的 dependencies 中声明目标 Brick 和命令:

"dependencies": {
  "com.brickly.openai": {
    "commands": ["chat"]
  }
}

跨 Brick 会话

当目标 Brick 需要保留内存状态时,使用 ctx.open_session(...)

session = ctx.open_session("com.brickly.openai", profile_id="work")

try:
    session.invoke("start-thread", {"title": "草稿"})
    reply = None
    for event in session.invoke_stream("chat", {"prompt": "继续这个话题"}):
        if event["type"] == "chunk":
            ctx.chunk(event.get("chunk"))
        elif event["type"] == "result":
            reply = event["result"]
    return reply
finally:
    session.close()

平台能力

系统 API:

@brick.on_command("show-app-info")
def show_app_info(ctx, _input):
    return {
        "appName": ctx.system.get_app_name(),
        "appVersion": ctx.system.get_app_version(),
        "userData": ctx.system.get_path("userData"),
        "isWindows": ctx.system.is_windows(),
    }

剪贴板 API:

@brick.on_command("replace-clipboard")
def replace_clipboard(ctx, _input):
    previous = ctx.platform.clipboard.read_content()
    updated = ctx.platform.clipboard.set_content({"kind": "text", "text": "来自 Python"})
    return {"previous": previous, "updated": updated}

输入和屏幕 API:

@brick.on_command("screen-info")
def screen_info(ctx, _input):
    point = ctx.platform.screen.get_cursor_screen_point()
    display = ctx.platform.screen.get_primary_display()
    return {"point": point, "display": display}


@brick.on_command("click")
def click(ctx, _input):
    ctx.platform.input.mouse_click(100, 100)
    ctx.platform.input.keyboard_tap("A", "control")
    return {"ok": True}

这些能力由宿主按 manifest 权限校验。缺少权限时,宿主会返回 host.error,SDK 会抛出 BppError

错误处理

抛出 BppError 可以保留明确错误码:

from brickly import BppError

raise BppError("INVALID_INPUT", "url 不能为空")

普通异常会被 SDK 转换为 INTERNAL_ERROR 并返回给宿主。

日志

brick.log("开始处理", {"id": 1})

brick.log(...) 会发送 runtime.log(info)到宿主。不要手动给日志加 [brickId] 前缀,宿主日志中心会自动附加 Brick ID、来源和作用域信息。

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