feat: add dev update channel

src/infra/update-channels.ts

@@ -0,0 +1,26 @@
+export type UpdateChannel = "stable" | "beta" | "dev";
+
+export const DEFAULT_PACKAGE_CHANNEL: UpdateChannel = "stable";
+export const DEFAULT_GIT_CHANNEL: UpdateChannel = "dev";
+export const DEV_BRANCH = "main";
+
+export function normalizeUpdateChannel(value?: string | null): UpdateChannel | null {
+  if (!value) return null;
+  const normalized = value.trim().toLowerCase();
+  if (normalized === "stable" || normalized === "beta" || normalized === "dev") return normalized;
+  return null;
+}
+
+export function channelToNpmTag(channel: UpdateChannel): string {
+  if (channel === "beta") return "beta";
+  if (channel === "dev") return "dev";
+  return "latest";
+}
+
+export function isBetaTag(tag: string): boolean {
+  return tag.toLowerCase().includes("-beta");
+}
+
+export function isStableTag(tag: string): boolean {
+  return !isBetaTag(tag);
+}