feat: support co-authorship lines in body

lib/rules/line-length.js

@@ -29,10 +29,14 @@ export default {
  let failed = false
  for (let i = 0; i < parsed.body.length; i++) {
  const line = parsed.body[i]
+
  // Skip quoted lines, e.g. for original commit messages of V8 backports.
  if (line.startsWith(' ')) { continue }
  // Skip lines with URLs.
  if (/https?:\/\//.test(line)) { continue }
+ // Skip co-authorship.
+ if (/^co-authored-by:/i.test(line)) { continue }
+
  if (line.length > len) {
  failed = true
  context.report({

test/rules/line-length.js

@@ -129,5 +129,37 @@ https://${'very-'.repeat(80)}-long-url.org/
  tt.end()
  })
 
+ t.test('Co-author lines', (tt) => {
+ const v = new Validator()
+
+ const good = new Commit({
+ sha: 'f1496de5a7d5474e39eafaafe6f79befe5883a5b',
+ author: {
+ name: 'Jacob Smith',
+ email: '3012099+JakobJingleheimer@users.noreply.github.com',
+ date: '2025-12-22T09:40:42Z'
+ },
+ message: [
+ 'fixup!: apply case-insensitive suggestion',
+ 'Co-authored-by: Michaël Zasso <37011812+targos@users.noreply.github.com>'
+ ].join('\n')
+ }, v)
+
+ good.report = (opts) => {
+ tt.pass('called report')
+ tt.equal(opts.id, 'line-length', 'id')
+ tt.equal(opts.string, '', 'string')
+ tt.equal(opts.level, 'pass', 'level')
+ }
+
+ Rule.validate(good, {
+ options: {
+ length: 72
+ }
+ })
+
+ tt.end()
+ })
+
  t.end()
 })