Make the SDK own the whole CLI process tree

rust/Cargo.toml

@@ -70,6 +70,18 @@ tokio-tungstenite = { version = "0.24", default-features = false, features = ["c
 
 [target.'cfg(windows)'.dependencies]
 zip = { version = "2", default-features = false, features = ["deflate"], optional = true }
+# Windows Job Object primitives backing `process_tree`'s CLI process-tree
+# containment (`JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE`).
+windows-sys = { version = "0.61", default-features = false, features = [
+    "Win32_Foundation",
+    "Win32_System_JobObjects",
+    "Win32_System_Threading",
+] }
+
+[target.'cfg(unix)'.dependencies]
+# Process-group primitives backing `process_tree`'s CLI process-tree
+# containment (`killpg`).
+libc = "0.2"
 
 [dev-dependencies]
 rusqlite = { version = "0.35", features = ["bundled"] }

rust/src/errors.rs

@@ -399,20 +399,21 @@ fn capture_backtrace() -> Option<Box<Backtrace>> {
 /// Aggregate of errors collected during [`crate::Client::stop`].
 ///
 /// `Client::stop` performs cooperative shutdown across every active
-/// session before killing the CLI child process. Errors from any
-/// per-session `session.destroy` RPC and from the terminal child-kill
-/// step are collected here rather than short-circuiting on the first
-/// failure, so callers see the full picture of what went wrong during
-/// teardown.
+/// session before tearing down the CLI's process tree. Errors from any
+/// per-session `session.destroy` RPC, runtime shutdown, process-tree
+/// termination, and the terminal child reap are collected here rather
+/// than short-circuiting on the first failure, so callers see the full
+/// picture of what went wrong during teardown.
 ///
 /// Implements [`std::error::Error`] and forwards to `Display` for the
 /// first error, with a count suffix when there are more.
 #[derive(Debug)]
 pub struct StopErrors(pub(crate) Vec<Error>);
 
 impl StopErrors {
-    /// Borrow the collected errors as a slice, in the order they
-    /// occurred (per-session destroys first, then child-kill last).
+    /// Borrow the collected errors as a slice, in the order they occurred
+    /// (per-session destroys first, then runtime shutdown, process-tree
+    /// termination, and the final child reap).
     pub fn errors(&self) -> &[Error] {
         &self.0
     }