fix(agent): prioritized subagent fallback chains

Placed subagent-scoped fallback chains ahead of inherited retry chains so overlapping primary selectors prefer the explicit subagent model order. Expanded the regression to pin fallback chain insertion order when a global chain shares the same primary selector.
2026-06-16 07:09:14 +00:00
parent 8c9910318d
commit 3742e07791
2 changed files with 30 additions and 8 deletions
@@ -185,10 +185,16 @@ function installSubagentRetryFallbackChain(args: {
 	}
 	modelRoles[role] = candidates[selectedIndex].selector;
 	settings.override("modelRoles", modelRoles);
-	settings.override("retry.fallbackChains", {
-		...settings.get("retry.fallbackChains"),
+	const fallbackChains: Record<string, string[]> = {
 		[role]: fallbackSelectors,
-	});
+	};
+	const existingFallbackChains = settings.get("retry.fallbackChains");
+	for (const existingRole in existingFallbackChains) {
+		if (existingRole !== role) {
+			fallbackChains[existingRole] = existingFallbackChains[existingRole];
+		}
+	}
+	settings.override("retry.fallbackChains", fallbackChains);
 	return role;
 }