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.github/scripts/update-changelog.mjs

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+import createTempFile from 'tempfile';
+import conventionalChangelog from 'conventional-changelog';
+import { resolve } from 'path';
+import { createReadStream, createWriteStream } from 'fs';
+import { dirname } from 'path';
+import { fileURLToPath } from 'url';
+import { pipeline } from 'stream/promises';
+import packageJson from '../../package.json' with { type: 'json' };
+
+const baseDir = resolve(dirname(fileURLToPath(import.meta.url)), '../..');
+const fullChangelogFile = resolve(baseDir, 'CHANGELOG.md');
+// Version includes experimental versions (e.g., 1.2.3-exp.0)
+const versionChangelogFile = resolve(baseDir, `CHANGELOG-${packageJson.version}.md`);
+
+const changelogStream = conventionalChangelog({
+	preset: 'angular',
+	releaseCount: 1,
+	tagPrefix: 'n8n@',
+	transform: (commit, callback) => {
+		const hasNoChangelogInHeader = commit.header.includes('(no-changelog)');
+		const isBenchmarkScope = commit.scope === 'benchmark';
+
+		// Ignore commits that have 'benchmark' scope or '(no-changelog)' in the header
+		callback(null, hasNoChangelogInHeader || isBenchmarkScope ? undefined : commit);
+	},
+}).on('error', (err) => {
+	console.error(err.stack);
+	process.exit(1);
+});
+
+// Write the new changelog to a new temporary file, so that the contents can be used in the PR description
+await pipeline(changelogStream, createWriteStream(versionChangelogFile));
+
+// Since we can't read and write from the same file at the same time,
+// we use a temporary file to output the updated changelog to.
+const tmpFile = createTempFile();
+const tmpStream = createWriteStream(tmpFile);
+await pipeline(createReadStream(versionChangelogFile), tmpStream, { end: false });
+await pipeline(createReadStream(fullChangelogFile), tmpStream);
+await pipeline(createReadStream(tmpFile), createWriteStream(fullChangelogFile));