tighten json ops docs and routing selection

Author: ndycode

docs/troubleshooting.md

@@ -19,6 +19,10 @@ For machine-readable automation or CI checks, these read-only tools also accept
 
 ```text
 codex-status format="json"
+codex-limits format="json"
+codex-health format="json"
+codex-next format="json"
+codex-list format="json"
 codex-dashboard format="json"
 codex-metrics format="json"
 codex-doctor deep=true format="json"

index.ts

@@ -4524,7 +4524,9 @@ while (attempted.size < Math.max(1, accountCount)) {
 				const explainabilityFamily =
 					runtimeMetrics.lastSelectionSnapshot?.family ?? "codex";
 				const explainabilityModel =
-					runtimeMetrics.lastSelectionSnapshot?.model ?? undefined;
+					runtimeMetrics.lastSelectionSnapshot?.effectiveModel ??
+					runtimeMetrics.lastSelectionSnapshot?.model ??
+					undefined;
 				const managerForExplainability =
 					cachedAccountManager ?? (await AccountManager.loadFromDisk());
 				const explainability = managerForExplainability.getSelectionExplainability(