feat: changelog.md release notes, v tags, plugin release notes and videos

packages/plugin-sdk/cli/commands/changelog.mjs

@@ -0,0 +1,25 @@
+import fs from "node:fs";
+import path from "node:path";
+import { readManifest } from "../lib/plugin-dir.mjs";
+import { loadSdkModule } from "./validate.mjs";
+
+/**
+ * Prints one version's notes from CHANGELOG.md, the manifest version unless
+ * --version says otherwise. The release workflow uses it as the release body.
+ */
+export async function changelog({ cwd, args = [] }) {
+  const index = args.indexOf("--version");
+  const version =
+    index === -1 ? readManifest(cwd).version : args[index + 1] || null;
+  if (!version) throw new Error("--version needs a value");
+
+  const file = path.join(cwd, "CHANGELOG.md");
+  if (!fs.existsSync(file)) throw new Error("There is no CHANGELOG.md");
+
+  const { changelogSection } = await loadSdkModule("changelog");
+  const section = changelogSection(fs.readFileSync(file, "utf8"), version);
+  if (!section) {
+    throw new Error(`CHANGELOG.md has no notes for ${version}`);
+  }
+  process.stdout.write(`${section}\n`);
+}