feat(release): write reviewed V2 release notes to CHANGELOG.md (#53964)

script/publish.ts

@@ -27,6 +27,20 @@ async function prepareReleaseFiles() {
   await $`bun install`
 }
 
+async function writeChangelog() {
+  const notes = process.env["OPENCODE_RELEASE_NOTES"]?.trim()
+  if (!notes) return
+  const file = Bun.file("CHANGELOG.md")
+  const text = await file.text()
+  const lines = text.split("\n")
+  if (lines.some((line) => line === `## ${tag}` || line.startsWith(`## ${tag} `))) return
+  const index = lines.findIndex((line) => line.startsWith("## "))
+  const head = (index === -1 ? lines : lines.slice(0, index)).join("\n").trimEnd()
+  const rest = index === -1 ? "" : lines.slice(index).join("\n")
+  const entry = `## ${tag} — ${new Date().toISOString().slice(0, 10)}\n\n${notes}\n`
+  await file.write(`${head}\n\n${entry}${rest ? `\n${rest}` : ""}`)
+}
+
 if (Script.release && !Script.preview) {
   await $`git fetch origin --tags`
   await $`git switch --detach`
@@ -90,6 +104,7 @@ if (Script.release && !Script.preview) {
   await $`git fetch origin`
   await $`git checkout -B v2 origin/v2`
   await prepareReleaseFiles()
+  await writeChangelog()
   if ((await $`git diff --quiet`.nothrow()).exitCode !== 0) {
     // The release already published this code; a push-triggered dev publish of a version bump is wasted work.
     await $`git commit -am ${`sync release versions for ${tag} [skip ci]`}`