From 1e99bd669e494f619e2e55653de4333772ad4d8c Mon Sep 17 00:00:00 2001
From: Copilot <223556219+Copilot@users.noreply.github.com>
Date: Fri, 15 May 2026 06:30:40 +0200
Subject: [PATCH] fix(auto): heartbeat before unit execution to prevent
 false-positive watchdog stalls

The HaltWatchdog fires when the loop goes >10s without a heartbeat. Each
iteration ends with a heartbeat, but unit execution itself can take 3+ minutes.
Without a heartbeat at the start of the unit phase, the watchdog detects idle
and emits a false-positive 'possible stuck iteration' error.

Add watchdog.heartbeat() immediately before both runUnitPhaseViaContract calls
(one in the custom-engine path, one in the dev path) so the watchdog timer is
reset before the long-running work begins.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 src/resources/extensions/sf/auto/loop.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/resources/extensions/sf/auto/loop.js b/src/resources/extensions/sf/auto/loop.js
index e7968234b..637ae083c 100644
--- a/src/resources/extensions/sf/auto/loop.js
+++ b/src/resources/extensions/sf/auto/loop.js
@@ -891,6 +891,7 @@ export async function autoLoop(ctx, pi, s, deps) {
 				}
 				// ── Unit execution (shared with dev path) ──
 				await enforceMinRequestInterval(s, ic.prefs);
+				watchdog.heartbeat(); // reset before long-running unit execution
 				const unitPhaseResult = await runUnitPhaseViaContract(
 					ic,
 					iterData,
@@ -1214,6 +1215,7 @@ export async function autoLoop(ctx, pi, s, deps) {
 				});
 			}
 			await enforceMinRequestInterval(s, ic.prefs);
+			watchdog.heartbeat(); // reset before long-running unit execution
 			const unitPhaseResult = await runUnitPhaseViaContract(
 				ic,
 				iterData,