feat: copy changelog release as markdown

apps/web/src/app/changelog/[version]/page.tsx

@@ -12,6 +12,7 @@ import {
 	ReleaseDescription,
 	ReleaseChanges,
 } from "../components/release";
+import { CopyMarkdownButton } from "../components/copy-markdown-button";
 
 type Props = { params: Promise<{ version: string }> };
 
@@ -51,14 +52,20 @@ export default async function ReleaseDetailPage({ params }: Props) {
 					All releases
 				</Link>
 
-				<ReleaseArticle variant="detail">
-					<div className="flex flex-col gap-4">
+			<ReleaseArticle variant="detail">
+				<div className="flex flex-col gap-4">
+					<div className="flex items-center justify-between">
 						<ReleaseMeta release={release} />
-						<ReleaseTitle as="h1">{release.title}</ReleaseTitle>
-						{release.description && (
-							<ReleaseDescription>{release.description}</ReleaseDescription>
-						)}
+						<CopyMarkdownButton
+							description={release.description}
+							changes={release.changes}
+						/>
 					</div>
+					<ReleaseTitle as="h1">{release.title}</ReleaseTitle>
+					{release.description && (
+						<ReleaseDescription>{release.description}</ReleaseDescription>
+					)}
+				</div>
 					<ReleaseChanges release={release} />
 				</ReleaseArticle>
 

apps/web/src/app/changelog/components/copy-markdown-button.tsx

@@ -0,0 +1,68 @@
+"use client";
+
+import { useState } from "react";
+import { CheckIcon, ClipboardIcon } from "lucide-react";
+import { getSectionTitle, groupAndOrderChanges } from "../utils";
+import type { Change } from "../utils";
+import { cn } from "@/utils/ui";
+import { Button } from "@/components/ui/button";
+
+function buildMarkdown({
+	description,
+	changes,
+}: {
+	description?: string;
+	changes: Change[];
+}): string {
+	const lines: string[] = [];
+
+	if (description) {
+		lines.push(description, "");
+	}
+
+	const { grouped, orderedTypes } = groupAndOrderChanges({ changes });
+
+	for (const type of orderedTypes) {
+		lines.push(`## ${getSectionTitle(type)}`);
+		for (const change of grouped[type]) {
+			lines.push(`- ${change.text}`);
+		}
+		lines.push("");
+	}
+
+	return lines.join("\n").trimEnd();
+}
+
+export function CopyMarkdownButton({
+	description,
+	changes,
+}: {
+	description?: string;
+	changes: Change[];
+}) {
+	const [copied, setCopied] = useState(false);
+
+	const handleCopy = async () => {
+		const markdown = buildMarkdown({ description, changes });
+		await navigator.clipboard.writeText(markdown);
+		setCopied(true);
+		setTimeout(() => setCopied(false), 2000);
+	};
+
+	return (
+		<Button
+			size="sm"
+			variant="text"
+			onClick={handleCopy}
+			className={cn("flex items-center gap-1.5", copied && "!text-green-500 pointer-events-none")}
+			title="Copy as markdown"
+		>
+			{copied ? (
+				<CheckIcon className="size-4" />
+			) : (
+				<ClipboardIcon className="size-4" />
+			)}
+			{copied ? "Copied!" : "Copy markdown"}
+		</Button>
+	);
+}