diff --git a/.gitignore b/.gitignore
index 9703c86..72cfbad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -111,3 +111,9 @@ dist
 
 # TernJS port file
 .tern-port
+
+# IDE
+.idea/
+
+# runtime data
+data/
diff --git a/bun.lock b/bun.lock
new file mode 100644
index 0000000..f93a13c
--- /dev/null
+++ b/bun.lock
@@ -0,0 +1,29 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "gacha-event-tracker",
+      "dependencies": {
+        "zod": "^3.23.8",
+      },
+      "devDependencies": {
+        "@types/bun": "^1.1.10",
+        "typescript": "^5.6.3",
+      },
+    },
+  },
+  "packages": {
+    "@types/bun": ["@types/bun@1.3.14", "", { "dependencies": { "bun-types": "1.3.14" } }, "sha512-h1hFqFVcvAvD9j9K7ZW7vd82aSA+rTdznZa+5bwvCwqSB1jmmfLcbIWhOLx1/+boy/xmjgCs/OMUL8hRJSmnPw=="],
+
+    "@types/node": ["@types/node@26.2.0", "", { "dependencies": { "undici-types": "~8.3.0" } }, "sha512-5IviulTZeRNp2vAJ514cc/HUlY5nZ9fCbq9DMyC52BrhFZACo3nI0R7qBxhQmo/d27NFe96ur/b7Wwxklda+kg=="],
+
+    "bun-types": ["bun-types@1.3.14", "", { "dependencies": { "@types/node": "*" } }, "sha512-4N0ig0fEomHt5R0KCFWjovxow98rIoRwKolrYdCcknNwMekCXRnWEUvgu5soYV8QXtVsrUD8B95MBOZGPvr6KQ=="],
+
+    "typescript": ["typescript@5.9.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw=="],
+
+    "undici-types": ["undici-types@8.3.0", "", {}, "sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ=="],
+
+    "zod": ["zod@3.25.76", "", {}, "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ=="],
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..263e19d
--- /dev/null
+++ b/package.json
@@ -0,0 +1,17 @@
+{
+  "name": "gacha-event-tracker",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "test": "bun test",
+    "typecheck": "tsc --noEmit",
+    "parse": "bun run scripts/parse-fixture.ts"
+  },
+  "dependencies": {
+    "zod": "^3.23.8"
+  },
+  "devDependencies": {
+    "@types/bun": "^1.1.10",
+    "typescript": "^5.6.3"
+  }
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..556f09f
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "lib": ["ESNext", "DOM"],
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "types": ["bun-types"],
+    "allowImportingTsExtensions": true,
+    "noEmit": true,
+    "strict": true,
+    "noUncheckedIndexedAccess": true,
+    "noImplicitOverride": true,
+    "noFallthroughCasesInSwitch": true,
+    "exactOptionalPropertyTypes": true,
+    "skipLibCheck": true,
+    "verbatimModuleSyntax": true
+  },
+  "include": ["src", "test", "scripts"]
+}