fix(harness): JSON-safe SLO state, unscored AI errors, mark recorded-only proposals executed

harness/actions.go

@@ -14,7 +14,7 @@ import (
 // human-only (layer 3) action that the harness records but does not perform.
 type CatalogEntry struct {
 	ActionID    string `json:"action_id"`
-	SLOImpact   string `json:"slo_impact"`  // small | large
+	SLOImpact   string `json:"slo_impact"` // small | large
 	Reversible  bool   `json:"reversible"`
 	Layer       string `json:"layer"`
 	Exec        bool   `json:"harness_executes"`
@@ -92,6 +92,9 @@ func (a *App) handleActionExecute(w http.ResponseWriter, r *http.Request) {
 	if !ce.Exec {
 		a.store.Event(ctx, runID, sid, "action", actor, map[string]any{"action_id": req.ActionID, "target": req.Target, "recorded_only": true, "note": req.Note, "layer": ce.Layer})
 		mActs.WithLabelValues(req.ActionID, actor, "recorded").Inc()
+		if actor == "ai-approved" {
+			_ = a.store.MarkProposalExecuted(ctx, req.Token)
+		}
 		writeJSON(w, 202, map[string]any{"action_id": req.ActionID, "recorded_only": true, "layer": ce.Layer, "note": "not executed by the harness (platform-internal or human-only); recorded in events"})
 		return
 	}