From cc33072eced3d5460512c09c42ec4531c807d7af Mon Sep 17 00:00:00 2001
From: historia <[not public]>
Date: Sat, 19 Sep 2026 01:55:34 -0400
Subject: fix: casino stake preservation, world state reconciliation, casino
 game registration

---
 internal/game/snapshot_render_guard_test.go | 40 +++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 internal/game/snapshot_render_guard_test.go

(limited to 'internal/game/snapshot_render_guard_test.go')

diff --git a/internal/game/snapshot_render_guard_test.go b/internal/game/snapshot_render_guard_test.go
new file mode 100644
index 0000000..83833d5
--- /dev/null
+++ b/internal/game/snapshot_render_guard_test.go
@@ -0,0 +1,40 @@
+package game
+
+// Guard for the last per-game presentation seam: the Snapshot marker interface
+// guarantees an event carries a structured view, but renderCasinoSnapshot's
+// type switch silently returns "" for a snapshot it does not know. This
+// source-level test pairs every `func (*X) snapshot() {}` in the casino package
+// with a `case *casino.X:` in the renderer, so adding a game cannot silently
+// drop its view (the text message would still appear, hiding the loss).
+
+import (
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"testing"
+)
+
+func TestEveryCasinoSnapshotHasARenderer(t *testing.T) {
+	typesSrc, err := os.ReadFile(filepath.Join("..", "casino", "types.go"))
+	if err != nil {
+		t.Fatalf("read casino types: %v", err)
+	}
+	renderSrc, err := os.ReadFile("casino.go")
+	if err != nil {
+		t.Fatalf("read renderer: %v", err)
+	}
+
+	re := regexp.MustCompile(`func \(\*(\w+)\) snapshot\(\)`)
+	matches := re.FindAllStringSubmatch(string(typesSrc), -1)
+	if len(matches) == 0 {
+		t.Fatal("no Snapshot implementations found in casino/types.go")
+	}
+	for _, m := range matches {
+		name := m[1]
+		want := "case *casino." + name + ":"
+		if !strings.Contains(string(renderSrc), want) {
+			t.Errorf("snapshot %s has no renderer: add `%s` to renderCasinoSnapshot", name, want)
+		}
+	}
+}
-- 
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