diff --git a/skills/kvb-org-queue/SKILL.md b/skills/kvb-org-queue/SKILL.md
index 12370f1..bc3a3cf 100644
--- a/skills/kvb-org-queue/SKILL.md
+++ b/skills/kvb-org-queue/SKILL.md
@@ -58,8 +58,7 @@ From the last 30 days, once 5 runs exist:
 - per signature, the disk need is p90 disk taken plus 1 GB;
 - per kind, the slot limit is how many p90 RAM and CPU shares fit between the
   median load at the grant and `load_limits`, at least 1;
-- per job, the footprint is the larger p90 share of its kind and of its
-  signature, else the largest of its kind.
+- per job, the footprint is its signature's p90 share, else its kind's.
 
 Until then the seeds hold: `slot_need_gb[kind]` for disk, 1 slot per kind,
 the whole budget as footprint: it runs alone.
diff --git a/skills/kvb-org-queue/scripts/history.py b/skills/kvb-org-queue/scripts/history.py
index 5eca130..6326053 100644
--- a/skills/kvb-org-queue/scripts/history.py
+++ b/skills/kvb-org-queue/scripts/history.py
@@ -212,21 +212,14 @@ def footprint(kind: str, name: str, signatures: dict[str, dict], kinds: dict[str
       kinds: the kind map of learn().
 
     Returns:
-      {ram, cpu}: the larger of the kind's p90 share and the signature's, at
-      least MIN_SHARE_PERCENT; a signature not learned yet takes the largest
-      learned share of its kind. None while the kind is not learned yet.
+      {ram, cpu}: the signature's p90 share once learned, else the kind's, at
+      least MIN_SHARE_PERCENT. None while the kind is not learned yet.
     """
     if kind not in kinds or kinds[kind]["ram_share"] is None:
         return None
-    own_kind = kinds[kind]
-    if name in signatures and signatures[name]["ram_share"] is not None:
-        peers = [signatures[name]]
-    else:
-        peers = [s for s in signatures.values() if kind in s["kinds"] and s["ram_share"] is not None]
-    return {
-        resource: max([MIN_SHARE_PERCENT, own_kind[f"{resource}_share"], *(peer[f"{resource}_share"] for peer in peers)])
-        for resource in RESOURCES
-    }
+    own = signatures.get(name)
+    source = own if own and own["ram_share"] is not None else kinds[kind]
+    return {resource: max(MIN_SHARE_PERCENT, source[f"{resource}_share"]) for resource in RESOURCES}
 
 
 def seed_ram(kinds: dict[str, dict]) -> float:
diff --git a/tests/test_queue.py b/tests/test_queue.py
index f969485..7e817b9 100644
--- a/tests/test_queue.py
+++ b/tests/test_queue.py
@@ -308,7 +308,17 @@ class TestHistory(unittest.TestCase):
         crowded = [history_row(n, mem_before=90, mem_max=95) for n in range(5)]
         self.assertEqual(self.learn(crowded)[1]["test"]["limit"], 1)
 
-    def test_footprint_takes_the_larger_of_kind_and_signature_at_least_the_minimum_and_none_for_a_new_kind(self):
+    def test_a_light_command_of_a_heavy_kind_and_an_unlearned_one_are_not_booked_at_the_heaviest_share(self):
+        signatures = {
+            "skills: make test": {"ram_share": 3.3, "cpu_share": 4, "kinds": {"test"}},
+            "gate.py hold": {"ram_share": 42.6, "cpu_share": 93.5, "kinds": {"test", "test-nostack"}},
+        }
+        kinds = {"test": {"ram_share": 35.2, "cpu_share": 83.6}, "test-nostack": {"ram_share": 5.6, "cpu_share": 73.8}}
+        footprint = self.history.footprint
+        self.assertEqual(footprint("test", "skills: make test", signatures, kinds), {"ram": 3.3, "cpu": 4})
+        self.assertEqual(footprint("test-nostack", "core: docker build", signatures, kinds), {"ram": 5.6, "cpu": 73.8})
+
+    def test_footprint_takes_the_learned_signature_else_the_kind_at_least_the_minimum_and_none_for_a_new_kind(self):
         small = [history_row(n, signature="make test", mem_max=25, cpu_max=20) for n in range(5)]
         big = [
             history_row(n + 5, kind="quality-high", signature="make verify-test", mem_max=80, cpu_max=90)