Add custom changelog formatter with frog emoji

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: theoephraim

.bumpy/changelog-formatter.ts

@@ -0,0 +1,39 @@
+import type { ChangelogFormatter } from '../packages/bumpy/src/core/changelog.ts';
+
+const formatter: ChangelogFormatter = (ctx) => {
+  const { release, changesets, date } = ctx;
+  const lines: string[] = [];
+  lines.push(`## 🐸 ${release.newVersion}`);
+  lines.push('');
+  lines.push(`_${date}_`);
+  lines.push('');
+
+  const relevantChangesets = changesets.filter((cs) => release.changesets.includes(cs.id));
+
+  if (relevantChangesets.length > 0) {
+    for (const cs of relevantChangesets) {
+      if (cs.summary) {
+        const summaryLines = cs.summary.split('\n');
+        lines.push(`- ${summaryLines[0]}`);
+        for (let i = 1; i < summaryLines.length; i++) {
+          if (summaryLines[i]!.trim()) {
+            lines.push(`  ${summaryLines[i]}`);
+          }
+        }
+      }
+    }
+  }
+
+  if (release.isDependencyBump && relevantChangesets.length === 0) {
+    lines.push('- Updated dependencies');
+  }
+
+  if (release.isCascadeBump && !release.isDependencyBump && relevantChangesets.length === 0) {
+    lines.push('- Version bump via cascade rule');
+  }
+
+  lines.push('');
+  return lines.join('\n');
+};
+
+export default formatter;

.bumpy/config.json

@@ -1,4 +1,4 @@
 {
   "baseBranch": "main",
-  "changelog": "default"
+  "changelog": "./changelog-formatter.ts"
 }