From 29fa45e501637374838c5a5ac5ea78e6b7ff7a87 Mon Sep 17 00:00:00 2001
From: Meta Vens <rwvens@hotmail.com>
Date: Sun, 1 Nov 2026 06:06:05 +0100
Subject: [PATCH] tempo sim: the busy report stays up until a launch comes on
 time

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
---
 crates/mind-body/src/tempo/sim.rs   | 7 +++++--
 crates/mind-body/src/tempo/tests.rs | 2 +-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/crates/mind-body/src/tempo/sim.rs b/crates/mind-body/src/tempo/sim.rs
index e3ac668..e1afa24 100644
--- a/crates/mind-body/src/tempo/sim.rs
+++ b/crates/mind-body/src/tempo/sim.rs
@@ -235,7 +235,8 @@ fn drive(
     let mut rng = Rng(seed);
     let mut busy_rng = Rng(seed ^ 0xB05E_B05E_B05E_B05E);
     let mut busy_until = vec![W0; scenario.minds];
-    let mut stalled = false;
+    // The heartbeat's report: a beat since the last launch found every Mind busy.
+    let (mut stalled, mut found_busy) = (false, false);
     let mut state = Fallback::default();
     let mut used = scenario.start_used;
     let mut resets = W0 + WINDOW_MS;
@@ -309,7 +310,8 @@ fn drive(
         out.last_beat = beat;
         if now - last_turn >= i64::from(beat) * 1000 {
             if let Some(mind) = busy_until.iter().position(|&until| until <= now) {
-                stalled = false;
+                stalled = found_busy;
+                found_busy = false;
                 let step =
                     scenario.cost_step.map_or(
                         1.0,
@@ -331,6 +333,7 @@ fn drive(
                 }
             } else {
                 stalled = true;
+                found_busy = true;
                 out.stalls += 1;
             }
         }
diff --git a/crates/mind-body/src/tempo/tests.rs b/crates/mind-body/src/tempo/tests.rs
index 5af29e1..6a1f383 100644
--- a/crates/mind-body/src/tempo/tests.rs
+++ b/crates/mind-body/src/tempo/tests.rs
@@ -870,7 +870,7 @@ fn a_saturated_report_stops_integration_toward_more_spend_only() {
     assert!(s.integral > integral, "not saturated, it integrates again");
     let integral = s.integral;
     let t = t + 60_000;
-    control(&T, &mut s, Some(&read(700, t)), t, 900, false, true);
+    control(&T, &mut s, Some(&read(480, t)), t, 900, false, true);
     assert!(
         s.integral < integral,
         "ahead, saturation does not hold the integral up"