ci: use changelog for prerelease notes

Author: xantiagoma

.github/workflows/publish-prerelease.yml

@@ -109,6 +109,14 @@ jobs:
 
           pkg.version = `${baseVersion}-${channel}.${timestamp}`;
           fs.writeFileSync(pkgPath, `${JSON.stringify(pkg, null, 2)}\n`);
+
+          const changelogPath = "CHANGELOG.md";
+          const changelog = fs.readFileSync(changelogPath, "utf8");
+          fs.writeFileSync(
+            changelogPath,
+            changelog.replace(`## ${baseVersion}`, `## ${pkg.version}`),
+          );
+
           console.log(`Prepared ${pkg.name}@${pkg.version}`);
           NODE
 
@@ -131,6 +139,33 @@ jobs:
             echo "Publishing prerelease version $NEXT."
           fi
 
+      - name: Prepare GitHub release notes
+        if: steps.publishable.outputs.ready == 'true'
+        env:
+          VERSION: ${{ steps.pkg.outputs.version }}
+          CHANNEL: ${{ env.CHANNEL }}
+        run: |
+          node <<'NODE'
+          const fs = require("node:fs");
+
+          const version = process.env.VERSION;
+          const channel = process.env.CHANNEL;
+          const changelog = fs.readFileSync("CHANGELOG.md", "utf8");
+          const heading = `## ${version}`;
+          const start = changelog.indexOf(heading);
+          const next =
+            start === -1 ? -1 : changelog.indexOf("\n## ", start + heading.length);
+
+          let notes =
+            start === -1
+              ? `## ${version}\n\nPrerelease published from branch ${process.env.GITHUB_REF_NAME}.`
+              : changelog.slice(start, next === -1 ? undefined : next).trim();
+
+          notes += `\n\nInstall with:\n\n\`\`\`sh\nnpm i drizzle-cursor@${channel}\n\`\`\`\n`;
+
+          fs.writeFileSync("release-notes.md", `${notes}\n`);
+          NODE
+
       - name: Publish prerelease
         if: steps.publishable.outputs.ready == 'true'
         run: |
@@ -155,11 +190,10 @@ jobs:
           VERSION: ${{ steps.pkg.outputs.version }}
           CHANNEL: ${{ env.CHANNEL }}
         run: |
-          NOTES="Prerelease published from branch $GITHUB_REF_NAME on channel '$CHANNEL'. Install with: npm i drizzle-cursor@$CHANNEL"
           if gh release view "v$VERSION" >/dev/null 2>&1; then
-            gh release edit "v$VERSION" --prerelease --title "v$VERSION" --notes "$NOTES"
+            gh release edit "v$VERSION" --prerelease --title "v$VERSION" --notes-file release-notes.md
           else
-            gh release create "v$VERSION" --target "$GITHUB_SHA" --prerelease --title "v$VERSION" --notes "$NOTES"
+            gh release create "v$VERSION" --target "$GITHUB_SHA" --prerelease --title "v$VERSION" --notes-file release-notes.md
           fi
 
       - name: Fail when no changeset is present

CONTRIBUTING.md

@@ -45,6 +45,7 @@ prerelease/beta/* branch push -> prerelease publish -> npm @beta
   - Generates prerelease versions before publishing to avoid version collisions:
     - `alpha`: snapshot versions such as `0.0.0-alpha-20260501011439`
     - `beta`: target-version timestamps such as `0.6.0-beta.20260501011439`
+  - Uses the generated `CHANGELOG.md` entry as GitHub prerelease notes
 
 ### Branch naming convention for prereleases