huskies: merge 1091 refactor Migrate the merge-gate's stale-cargo kill path to process_kill

server/src/agents/pool/pipeline/completion/server.rs

@@ -74,25 +74,11 @@ pub(in crate::agents::pool) async fn run_server_owned_completion(
 
     // Kill any in-flight cargo test processes for this worktree so they don't
     // hold the build lock while gates try to run.
-    if let Some(wt_path) = worktree_path.as_ref()
-        && let Ok(output) = std::process::Command::new("pgrep")
-            .args([
-                "-f",
-                &format!("--manifest-path {}/Cargo.toml", wt_path.display()),
-            ])
-            .output()
-    {
-        let pids = String::from_utf8_lossy(&output.stdout);
-        for pid_str in pids.lines() {
-            if let Ok(pid) = pid_str.trim().parse::<i32>() {
-                crate::slog!(
-                    "[agents] Killing stale cargo process (pid {pid}) for '{story_id}' before running gates"
-                );
-                unsafe {
-                    libc::kill(pid, libc::SIGKILL);
-                }
-            }
-        }
+    if let Some(wt_path) = worktree_path.as_ref() {
+        let pattern = format!("--manifest-path {}/Cargo.toml", wt_path.display());
+        let _ = crate::process_kill::sigkill_pids_and_verify(&crate::process_kill::pids_matching(
+            &pattern,
+        ));
     }
 
     // Run acceptance gates.  Third element of the tuple is `needs_commit_recovery`: