feat: gamemaster

gamemaster/internal/service/livenessreply/errors.go

@@ -0,0 +1,19 @@
+package livenessreply
+
+// Stable error codes returned by Handle as Go-level errors. Liveness
+// reply itself never produces a 4xx/5xx response — the endpoint always
+// answers 200 — but the service surfaces structural validation
+// failures to the handler so it can return the standard error envelope.
+const (
+	// ErrorCodeInvalidRequest reports that the request envelope failed
+	// structural validation (empty GameID).
+	ErrorCodeInvalidRequest = "invalid_request"
+
+	// ErrorCodeServiceUnavailable reports that a steady-state
+	// dependency (PostgreSQL) was unreachable for this call.
+	ErrorCodeServiceUnavailable = "service_unavailable"
+
+	// ErrorCodeInternal reports an unexpected error not classified by
+	// the other codes.
+	ErrorCodeInternal = "internal_error"
+)