fix(codex): honor usage_limit_reached resets_at for retry_after

internal/runtime/executor/codex_executor_retry_test.go

@@ -0,0 +1,58 @@
+package executor
+
+import (
+	"net/http"
+	"strconv"
+	"testing"
+	"time"
+)
+
+func TestParseCodexRetryAfter_ResetsInSeconds(t *testing.T) {
+	body := []byte(`{"error":{"type":"usage_limit_reached","resets_in_seconds":123}}`)
+	retryAfter := parseCodexRetryAfter(http.StatusTooManyRequests, body)
+	if retryAfter == nil {
+		t.Fatalf("expected retryAfter, got nil")
+	}
+	if *retryAfter != 123*time.Second {
+		t.Fatalf("retryAfter = %v, want %v", *retryAfter, 123*time.Second)
+	}
+}
+
+func TestParseCodexRetryAfter_PrefersResetsAt(t *testing.T) {
+	resetAt := time.Now().Add(5 * time.Minute).Unix()
+	body := []byte(`{"error":{"type":"usage_limit_reached","resets_at":` + itoa(resetAt) + `,"resets_in_seconds":1}}`)
+	retryAfter := parseCodexRetryAfter(http.StatusTooManyRequests, body)
+	if retryAfter == nil {
+		t.Fatalf("expected retryAfter, got nil")
+	}
+	if *retryAfter < 4*time.Minute || *retryAfter > 6*time.Minute {
+		t.Fatalf("retryAfter = %v, want around 5m", *retryAfter)
+	}
+}
+
+func TestParseCodexRetryAfter_FallbackWhenResetsAtPast(t *testing.T) {
+	resetAt := time.Now().Add(-1 * time.Minute).Unix()
+	body := []byte(`{"error":{"type":"usage_limit_reached","resets_at":` + itoa(resetAt) + `,"resets_in_seconds":77}}`)
+	retryAfter := parseCodexRetryAfter(http.StatusTooManyRequests, body)
+	if retryAfter == nil {
+		t.Fatalf("expected retryAfter, got nil")
+	}
+	if *retryAfter != 77*time.Second {
+		t.Fatalf("retryAfter = %v, want %v", *retryAfter, 77*time.Second)
+	}
+}
+
+func TestParseCodexRetryAfter_NonApplicableReturnsNil(t *testing.T) {
+	body := []byte(`{"error":{"type":"usage_limit_reached","resets_in_seconds":30}}`)
+	if got := parseCodexRetryAfter(http.StatusBadRequest, body); got != nil {
+		t.Fatalf("expected nil for non-429, got %v", *got)
+	}
+	body = []byte(`{"error":{"type":"server_error","resets_in_seconds":30}}`)
+	if got := parseCodexRetryAfter(http.StatusTooManyRequests, body); got != nil {
+		t.Fatalf("expected nil for non-usage_limit_reached, got %v", *got)
+	}
+}
+
+func itoa(v int64) string {
+	return strconv.FormatInt(v, 10)
+}