Support OpenCost currency detection and overrides

README.md

@@ -228,6 +228,7 @@ output) for plain text. URLs, tokens, and suggested commands remain unstyled.
 | `--prometheus-url` | (auto-discover) | Manual Prometheus/VictoriaMetrics URL (skips auto-discovery) |
 | `--prometheus-header` | | HTTP header sent with every Prometheus request, format `Key=Value` (repeatable). Required for auth-protected backends. |
 | `--prometheus-header-from-env` | | HTTP header sent with every Prometheus request, sourced from an environment variable, format `Key=ENV_VAR` (repeatable). |
+| `--opencost-currency` | (auto-detect, then USD) | Override the ISO 4217 currency label for OpenCost values. Radar labels values but does not convert them. |
 | `--auth-mode` | `none` | Authentication mode: `none`, `proxy`, or `oidc` ([details](docs/authentication.md)) |
 | `--no-mcp` | `false` | Disable MCP server for AI tool integration |
 | `--mcp-catalog-stdio` | `false` | Start only the MCP catalog over stdio for registry introspection |
@@ -428,7 +429,9 @@ See [docs/capacity.md](docs/capacity.md) for the full reference.
 
 ### Cost Insights
 
-Track Kubernetes spending with OpenCost integration — no additional configuration needed.
+Track Kubernetes spending with OpenCost integration. Radar reads `currencyCode` from a running
+OpenCost pricing configuration when available and otherwise uses USD. Override the label in
+Settings → Cost, config, CLI, or Helm. Radar does not convert values between currencies.
 
 - Cluster hourly and projected monthly cost, top namespaces by spend
 - Cost trend charts with 6h/24h/7d range selector

cmd/desktop/main.go

@@ -66,6 +66,7 @@ func main() {
 	timelineRetention := flag.Duration("timeline-retention", fileCfg.TimelineRetentionOr(7*24*time.Hour), "How long to retain timeline events when --timeline-storage=sqlite (e.g. 168h, 720h). 0 disables age-based cleanup.")
 	timelineMaxSize := flag.String("timeline-max-size", fileCfg.TimelineMaxSizeOr("1Gi"), "Maximum SQLite timeline storage size before pruning oldest events (e.g. 800Mi, 8Gi). 0 disables size-based pruning.")
 	prometheusURL := flag.String("prometheus-url", fileCfg.PrometheusURL, "Manual Prometheus/VictoriaMetrics URL (skips auto-discovery)")
+	openCostCurrency := flag.String("opencost-currency", fileCfg.OpenCostCurrency, "Override the ISO 4217 currency label for OpenCost values (empty: auto-detect, then USD)")
 	flag.Parse()
 
 	if *showVersion {
@@ -107,19 +108,27 @@ func main() {
 	}
 	namespaceFlagSet := false
 	namespacesFlagSet := false
+	openCostCurrencyFlagSet := false
 	flag.Visit(func(f *flag.Flag) {
 		switch f.Name {
 		case "namespace":
 			namespaceFlagSet = true
 		case "namespaces":
 			namespacesFlagSet = true
+		case "opencost-currency":
+			openCostCurrencyFlagSet = true
 		}
 	})
 	timelineMaxSizeBytes, err := config.ParseByteSize(*timelineMaxSize)
 	if err != nil {
 		log.Printf("ERROR: invalid --timeline-max-size %q: %v", *timelineMaxSize, err)
 		os.Exit(1)
 	}
+	normalizedOpenCostCurrency, err := config.NormalizeOpenCostCurrency(*openCostCurrency)
+	if err != nil {
+		log.Printf("ERROR: invalid --opencost-currency %q: %v", *openCostCurrency, err)
+		os.Exit(1)
+	}
 	resolvedPrometheusHeaders, err := app.ResolvePrometheusHeaders(fileCfg.PrometheusHeaders, fileCfg.PrometheusHeadersFromEnv)
 	if err != nil {
 		log.Printf("ERROR: invalid Prometheus header configuration: %v", err)
@@ -163,6 +172,8 @@ func main() {
 		TimelineRetention:        *timelineRetention,
 		TimelineMaxSizeBytes:     timelineMaxSizeBytes,
 		PrometheusURL:            *prometheusURL,
+		OpenCostCurrency:         normalizedOpenCostCurrency,
+		OpenCostFlagSet:          openCostCurrencyFlagSet,
 		PrometheusHeaders:        resolvedPrometheusHeaders,
 		PrometheusHeadersFromEnv: fileCfg.PrometheusHeadersFromEnv,
 		Version:                  version,

cmd/explorer/main.go

@@ -132,6 +132,7 @@ func main() {
 	aiHistory := flag.Bool("ai-history", fileCfg.AIHistoryOr(true), "Persist AI investigations (transcripts + verdicts) to ~/.radar/ai-runs.db so they survive restarts")
 	// Traffic/metrics options
 	prometheusURL := flag.String("prometheus-url", fileCfg.PrometheusURL, "Manual Prometheus/VictoriaMetrics URL (skips auto-discovery)")
+	openCostCurrency := flag.String("opencost-currency", fileCfg.OpenCostCurrency, "Override the ISO 4217 currency label for OpenCost values (empty: auto-detect, then USD)")
 	// --prometheus-header Key=Value, repeatable. Defaults populated from
 	// config file; any --prometheus-header flag replaces the file value rather
 	// than merging — matches kubectl semantics (file is the default, CLI wins).
@@ -270,9 +271,14 @@ func main() {
 	if err != nil {
 		log.Fatalf("Invalid --timeline-max-size %q: %v", *timelineMaxSize, err)
 	}
+	normalizedOpenCostCurrency, err := config.NormalizeOpenCostCurrency(*openCostCurrency)
+	if err != nil {
+		log.Fatalf("Invalid --opencost-currency %q: %v", *openCostCurrency, err)
+	}
 	noMCPFlagSet := false
 	namespaceFlagSet := false
 	namespacesFlagSet := false
+	openCostCurrencyFlagSet := false
 	flag.Visit(func(f *flag.Flag) {
 		switch f.Name {
 		case "no-mcp":
@@ -281,6 +287,8 @@ func main() {
 			namespaceFlagSet = true
 		case "namespaces":
 			namespacesFlagSet = true
+		case "opencost-currency":
+			openCostCurrencyFlagSet = true
 		}
 	})
 	if *mcpCatalogOnly && noMCPFlagSet && *noMCP {
@@ -349,6 +357,8 @@ func main() {
 		TimelineRetention:        *timelineRetention,
 		TimelineMaxSizeBytes:     timelineMaxSizeBytes,
 		PrometheusURL:            *prometheusURL,
+		OpenCostCurrency:         normalizedOpenCostCurrency,
+		OpenCostFlagSet:          openCostCurrencyFlagSet,
 		PrometheusHeaders:        resolvedPrometheusHeaders,
 		PrometheusHeadersFromEnv: promHeadersFromEnv.value(),
 		BeylaJobSelector:         *beylaJobSelector,

deploy/helm/radar/README.md

@@ -172,6 +172,7 @@ lands in the Helm release state. Rotation requires a pod restart. See
 | `timeline.retention` | SQLite retention (Go duration; `0` disables) | `168h` |
 | `timeline.maxSize` | SQLite max DB + WAL size before oldest events are pruned (`0` disables) | `800Mi` |
 | `persistence.enabled` | Enable PVC for SQLite | `false` |
+| `cost.currency` | Optional ISO 4217 override for OpenCost values; empty auto-detects, then uses USD | `""` |
 | `traffic.prometheusUrl` | Manual Prometheus/VictoriaMetrics URL (skips auto-discovery) | `""` |
 | `traffic.prometheusHeaders` | HTTP headers sent with every Prometheus request (auth-protected backends) | `{}` |
 | `traffic.prometheusHeadersFromEnv` | Prometheus headers sourced from environment variables, for secret-backed auth headers | `{}` |

deploy/helm/radar/templates/deployment.yaml

@@ -91,6 +91,9 @@ spec:
             {{- if .Values.traffic.prometheusUrl }}
             - --prometheus-url={{ .Values.traffic.prometheusUrl }}
             {{- end }}
+            {{- if .Values.cost.currency }}
+            - --opencost-currency={{ .Values.cost.currency }}
+            {{- end }}
             {{- range $k, $v := .Values.traffic.prometheusHeaders }}
             - {{ printf "--prometheus-header=%s=%s" $k $v | quote }}
             {{- end }}

deploy/helm/radar/values.schema.json

@@ -301,6 +301,17 @@
         "enabled": { "type": "boolean" }
       }
     },
+    "cost": {
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "currency": {
+          "type": "string",
+          "pattern": "^$|^[A-Za-z]{3}$",
+          "description": "Optional ISO 4217 override for OpenCost values; empty auto-detects from a running OpenCost pricing config, then uses USD."
+        }
+      }
+    },
     "traffic": {
       "type": "object",
       "additionalProperties": true,

deploy/helm/radar/values.yaml

@@ -448,6 +448,12 @@ mcp:
   # Set to false to disable the MCP server (useful when deployed behind authentication)
   enabled: true
 
+# OpenCost display configuration
+cost:
+  # Optional ISO 4217 override for OpenCost values. Empty detects currencyCode
+  # from a running OpenCost pricing config when available, then uses USD.
+  currency: ""
+
 # Traffic source configuration
 traffic:
   # Manual Prometheus/VictoriaMetrics URL (bypasses auto-discovery)

docs/configuration.md

@@ -46,6 +46,7 @@ Persistent defaults for CLI flags. CLI flags always override these values. Manag
   "timelineMaxSize": "0",
   "historyLimit": 10000,
   "prometheusUrl": "",
+  "opencostCurrency": "",
   "prometheusHeaders": {},
   "mcp": true,
   "debugImage": ""
@@ -68,6 +69,7 @@ All fields are optional — omitted fields use built-in defaults.
 | `timelineMaxSize` | Max SQLite DB + WAL size before pruning oldest events (`0` disables) |
 | `historyLimit` | Max timeline events to retain |
 | `prometheusUrl` | Manual Prometheus/VictoriaMetrics URL — skips auto-discovery. Useful when Prometheus is not in the same cluster or uses a non-standard service name. |
+| `opencostCurrency` | Optional ISO 4217 override for values produced by OpenCost. Empty detects `currencyCode` from a running OpenCost pricing configuration when Radar auto-discovers cluster Prometheus, then falls back to `USD`. Radar labels values but does not convert them. Equivalent CLI: `--opencost-currency`; an explicit CLI value remains authoritative while Radar runs and after restart. |
 | `prometheusHeaders` | HTTP headers sent with every Prometheus request. Required for auth-protected backends — e.g. `{"X-Scope-OrgID": "my-org"}`. Equivalent CLI: `--prometheus-header Key=Value` (repeatable). Stored in plain text in `config.json` — protect the file accordingly. |
 | `argoCdUrl` | Manual argocd-server URL for the Argo CD API integration — skips auto-discovery. |
 | `argoCdToken` | Argo CD API token (get-only account recommended). Stored in plain text — the file is written `0600`; the token is redacted from `GET /api/config`. |

docs/integrations.md

@@ -1166,7 +1166,9 @@ PolicyReport findings are policy posture, not live operational failure, so they
 
 [OpenCost](https://www.opencost.io/) is a CNCF tool for Kubernetes cost monitoring, exposing cloud provider pricing and workload resource allocation as Prometheus metrics.
 
-Radar discovers if OpenCost metrics are available in the already-discovered Prometheus. If OpenCost is installed and scraping into Prometheus, cost data appears automatically with no additional configuration. The integration is passive and read-only.
+Radar discovers if OpenCost metrics are available in the already-discovered Prometheus. If OpenCost is installed and scraping into Prometheus, cost data appears automatically. The integration is passive and read-only.
+
+OpenCost's Prometheus metrics contain numeric values but no currency metadata. When Radar auto-discovers Prometheus in the connected cluster, it looks for `currencyCode` in the pricing ConfigMap referenced by a running OpenCost deployment. If that evidence is unavailable or ambiguous, Radar uses USD. Radar skips cluster inference for a manually configured Prometheus URL because it may serve another cluster. Override the label in Settings → Cost or `opencostCurrency` (CLI: `--opencost-currency`; Helm: `cost.currency`). CLI and Helm overrides remain authoritative while Radar runs and after restart. Radar labels the values but does not convert them.
 
 ### What Radar Shows
 

go.mod

@@ -26,6 +26,7 @@ require (
 	golang.org/x/sync v0.22.0
 	golang.org/x/sys v0.47.0
 	golang.org/x/term v0.45.0
+	golang.org/x/text v0.41.0
 	google.golang.org/grpc v1.83.0
 	google.golang.org/protobuf v1.36.12-0.20260120151049-f2248ac996af
 	helm.sh/helm/v3 v3.21.3
@@ -157,7 +158,6 @@ require (
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/crypto v0.55.0 // indirect
 	golang.org/x/exp v0.0.0-20260611194520-c48552f49976 // indirect
-	golang.org/x/text v0.41.0 // indirect
 	golang.org/x/time v0.15.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20260526163538-3dc84a4a5aaa // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20260622175928-b703f567277d // indirect

internal/app/bootstrap.go

@@ -59,6 +59,8 @@ type AppConfig struct {
 	TimelineRetention        time.Duration
 	TimelineMaxSizeBytes     int64
 	PrometheusURL            string
+	OpenCostCurrency         string
+	OpenCostFlagSet          bool
 	PrometheusHeaders        map[string]string
 	PrometheusHeadersFromEnv map[string]string
 	BeylaJobSelector         string
@@ -275,6 +277,7 @@ func CreateServer(cfg AppConfig) *server.Server {
 		TimelineMaxSize:          fmt.Sprintf("%d", cfg.TimelineMaxSizeBytes),
 		HistoryLimit:             cfg.HistoryLimit,
 		PrometheusURL:            cfg.PrometheusURL,
+		OpenCostCurrency:         cfg.OpenCostCurrency,
 		PrometheusHeaders:        cfg.PrometheusHeaders,
 		PrometheusHeadersFromEnv: cfg.PrometheusHeadersFromEnv,
 		DebugImage:               cfg.DebugImage,
@@ -292,6 +295,8 @@ func CreateServer(cfg AppConfig) *server.Server {
 		StaticFS:         static.FS,
 		StaticRoot:       "dist",
 		EffectiveConfig:  effectiveCfg,
+		OpenCostCurrency: cfg.OpenCostCurrency,
+		OpenCostManaged:  cfg.OpenCostFlagSet,
 		DiagConfig: &server.DiagConfig{
 			Port:                 cfg.Port,
 			DevMode:              cfg.DevMode,
@@ -300,6 +305,7 @@ func CreateServer(cfg AppConfig) *server.Server {
 			HistoryLimit:         cfg.HistoryLimit,
 			DebugEvents:          cfg.DebugEvents,
 			MCPEnabled:           cfg.MCPEnabled,
+			OpenCostCurrency:     cfg.OpenCostCurrency,
 			HasPrometheusURL:     cfg.PrometheusURL != "",
 			HasPrometheusHeaders: len(cfg.PrometheusHeaders) > 0,
 		},

internal/config/config.go

@@ -27,6 +27,7 @@ type Config struct {
 	TimelineMaxSize   string   `json:"timelineMaxSize,omitempty"`   // Byte size (e.g. "800Mi", "8Gi"); "0" disables
 	HistoryLimit      int      `json:"historyLimit,omitempty"`
 	PrometheusURL     string   `json:"prometheusUrl,omitempty"`
+	OpenCostCurrency  string   `json:"opencostCurrency,omitempty"`
 	// PrometheusHeaders are sent with every request to the Prometheus API.
 	// Required for auth-protected backends (Bearer tokens, X-Scope-OrgID, etc.).
 	// Stored in plain text in ~/.radar/config.json — protect the file accordingly.

internal/config/opencost.go

@@ -0,0 +1,23 @@
+package config
+
+import (
+	"fmt"
+	"strings"
+
+	"golang.org/x/text/currency"
+)
+
+func NormalizeOpenCostCurrency(raw string) (string, error) {
+	code := strings.ToUpper(strings.TrimSpace(raw))
+	if code == "" {
+		return "", nil
+	}
+	if code == "XXX" || code == "XTS" {
+		return "", fmt.Errorf("must be a monetary ISO 4217 currency code")
+	}
+	unit, err := currency.ParseISO(code)
+	if err != nil {
+		return "", fmt.Errorf("must be a recognized ISO 4217 currency code: %w", err)
+	}
+	return unit.String(), nil
+}

internal/config/opencost_test.go

@@ -0,0 +1,31 @@
+package config
+
+import "testing"
+
+func TestNormalizeOpenCostCurrency(t *testing.T) {
+	tests := []struct {
+		name    string
+		raw     string
+		want    string
+		wantErr bool
+	}{
+		{name: "auto", want: ""},
+		{name: "trim and uppercase", raw: " gbp ", want: "GBP"},
+		{name: "zero decimal currency", raw: "jpy", want: "JPY"},
+		{name: "unknown", raw: "ZZZ", wantErr: true},
+		{name: "malformed", raw: "EURO", wantErr: true},
+		{name: "no currency", raw: "XXX", wantErr: true},
+		{name: "testing code", raw: "XTS", wantErr: true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := NormalizeOpenCostCurrency(tt.raw)
+			if (err != nil) != tt.wantErr {
+				t.Fatalf("NormalizeOpenCostCurrency(%q) error = %v, wantErr %v", tt.raw, err, tt.wantErr)
+			}
+			if got != tt.want {
+				t.Errorf("NormalizeOpenCostCurrency(%q) = %q, want %q", tt.raw, got, tt.want)
+			}
+		})
+	}
+}