Record latest Jerboa feature data

ober

9bd6ec0953f69feea8663e81a774c4caf9de5644

diff --git a/data/features.sexp b/data/features.sexp
index 14b8137..35545be 100644
--- a/data/features.sexp
+++ b/data/features.sexp
@@ -3622,4 +3622,22 @@
    ("use_case"
      .
      "Continue mandatory Jerboa verification and knowledge writes after one server transport failure.")
+   ("votes" . 0))
+ (("description"
+    .
+    "Provide a reusable Jerboa benchmark wrapper that records its process group, enforces a wall-clock deadline, cleans up descendants, and warns when same-project benchmark workers already exist.")
+   ("estimated_token_reduction"
+     .
+     "~400 tokens and one manual process-audit cycle per contaminated benchmark")
+   ("example_scenario"
+     .
+     "A seven-hour stale capacity worker retained several GiB and made an unchanged reader appear slower until its process tree was found and stopped.")
+   ("id" . "benchmark-process-guard") ("impact" . "medium")
+   ("status" . "proposed")
+   ("tags" "benchmark" "timeout" "process" "cleanup"
+     "reproducibility")
+   ("title" . "Add benchmark timeout and stale-process guard")
+   ("use_case"
+     .
+     "Long capacity and soak benchmarks that may survive an interrupted agent session and contaminate later measurements.")
    ("votes" . 0)))