feat: initialize experimental agent repo

src/logger.ts

@@ -0,0 +1,42 @@
+import pino from "pino";
+
+import { config } from "./config.js";
+
+const pad = (value: number) => value.toString().padStart(2, "0");
+
+const padMilliseconds = (value: number) => value.toString().padStart(3, "0");
+
+const formatLocalTimestamp = (date: Date) => {
+  const year = date.getFullYear();
+  const month = pad(date.getMonth() + 1);
+  const day = pad(date.getDate());
+  const hours = pad(date.getHours());
+  const minutes = pad(date.getMinutes());
+  const seconds = pad(date.getSeconds());
+  const milliseconds = padMilliseconds(date.getMilliseconds());
+  const offsetMinutes = -date.getTimezoneOffset();
+  const sign = offsetMinutes >= 0 ? "+" : "-";
+  const absoluteOffsetMinutes = Math.abs(offsetMinutes);
+  const offsetHours = pad(Math.floor(absoluteOffsetMinutes / 60));
+  const offsetRemainderMinutes = pad(absoluteOffsetMinutes % 60);
+
+  return `${year}-${month}-${day}T${hours}:${minutes}:${seconds}.${milliseconds}${sign}${offsetHours}:${offsetRemainderMinutes}`;
+};
+
+export const logger = pino({
+  level: config.LOG_LEVEL,
+  formatters: {
+    level: (label) => ({ level: label }),
+  },
+  timestamp: () => `,"time":"${formatLocalTimestamp(new Date())}"`,
+  transport:
+    config.NODE_ENV === "development"
+      ? {
+          target: "pino-pretty",
+          options: {
+            colorize: true,
+            translateTime: "SYS:yyyy-mm-dd HH:MM:ss.l o",
+          },
+        }
+      : undefined,
+});