feat: publish Gamertan Tend preview source

Sanitized root snapshot from private source commit a72903c63e1753f9e6ffbf40453c0830bdfc05c5 and tree 295641e67eef5979da76746d8ae271249568263e. Private development history and workflows are excluded by the exact allowlist.

AI-assisted: OpenAI Codex helped implement, test, and audit this preview.
Signed-off-by: Cole Speelman <crspeelman@gmail.com>

internal/state/state_test.go

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+
+package state
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+func TestStoreLoadRoundTripAndRejectSymlink(t *testing.T) {
+	root := filepath.Join(t.TempDir(), "service")
+	release := filepath.Join(root, "releases", "sha256-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
+	if err := os.MkdirAll(release, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	path := filepath.Join(root, "state.json")
+	record := Record{SchemaVersion: 1, Strategy: "singleton_candidate", ActiveSlot: "singleton", ActiveRelease: release, UpdatedAt: time.Unix(1, 0).UTC().Format(time.RFC3339)}
+	if err := Store(path, root, record); err != nil {
+		t.Fatal(err)
+	}
+	loaded, err := Load(path, root, "singleton_candidate")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if loaded.ActiveRelease != release {
+		t.Fatalf("release=%q", loaded.ActiveRelease)
+	}
+	if err := os.Remove(path); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink(filepath.Join(root, "elsewhere"), path); err != nil {
+		t.Fatal(err)
+	}
+	if err := Store(path, root, record); err == nil {
+		t.Fatal("expected symlink refusal")
+	}
+}
+func TestRecordRejectsReleaseOutsideRoot(t *testing.T) {
+	record := Record{SchemaVersion: 1, Strategy: "singleton_candidate", ActiveSlot: "singleton", ActiveRelease: "/tmp/other/release", UpdatedAt: time.Unix(1, 0).UTC().Format(time.RFC3339)}
+	if err := record.Validate("/opt/example", "singleton_candidate"); err == nil {
+		t.Fatal("expected path refusal")
+	}
+}