Fetch RFC authors from PR branch for proposed RFCs

Instead of using the PR opener as the author, fetch the file content
from the PR branch via GitHub API and parse the - Authors: field.
Falls back to PR author if no authors field is found.

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

Author: gatesn

index.ts

@@ -37,7 +37,7 @@ interface ProposedRFC {
   title: string;
   prNumber: number;
   prUrl: string;
-  author: GitHubAuthor | null;
+  authors: GitHubAuthor[];
 }
 
 const THEME_SCRIPT = `
@@ -175,14 +175,14 @@ function indexPage(
   if (proposed.length > 0) {
     const proposedList = proposed
       .map((rfc) => {
-        let authorHTML = "";
-        if (rfc.author) {
-          authorHTML = `
-          <a href="${rfc.author.profileUrl}" class="rfc-author-link" title="${rfc.author.login}">
-            <img src="${rfc.author.avatarUrl}" alt="${rfc.author.login}" class="rfc-author-avatar">
-            <span class="rfc-author-name">${rfc.author.login}</span>
-          </a>`;
-        }
+        const authorHTML = rfc.authors
+          .map(
+            (author) => `
+          <a href="${author.profileUrl}" class="rfc-author-link" title="${author.login}">
+            <img src="${author.avatarUrl}" alt="${author.login}" class="rfc-author-avatar">
+          </a>`,
+          )
+          .join("");
 
         return `
       <li>
@@ -512,7 +512,7 @@ async function getProposedRFCs(
   if (!repoPath) return [];
   try {
     const result =
-      await $`gh pr list --repo ${repoPath} --state open --json number,title,url,files,author`.quiet();
+      await $`gh pr list --repo ${repoPath} --state open --json number,title,url,files,author,headRefName`.quiet();
     const prs = JSON.parse(result.stdout.toString());
     const proposed: ProposedRFC[] = [];
 
@@ -529,18 +529,30 @@ async function getProposedRFCs(
       const rfcNumber = rfcFile.path.match(/(\d{4})-/)?.[1];
       if (!rfcNumber) continue;
 
+      // Fetch file content from PR branch to parse authors
+      let authors: GitHubAuthor[] = [];
+      try {
+        const fileResult =
+          await $`gh api repos/${repoPath}/contents/${rfcFile.path}?ref=${pr.headRefName} --jq '.content'`.quiet();
+        const content = atob(fileResult.stdout.toString().trim());
+        const logins = parseAuthorLogins(content);
+        if (logins.length > 0) {
+          authors = loginsToAuthors(logins);
+        }
+      } catch {
+        // Fall back to PR author
+      }
+
+      if (authors.length === 0 && pr.author) {
+        authors = loginsToAuthors([pr.author.login]);
+      }
+
       proposed.push({
         number: rfcNumber,
         title: pr.title,
         prNumber: pr.number,
         prUrl: pr.url,
-        author: pr.author
-          ? {
-              login: pr.author.login,
-              avatarUrl: `https://github.com/${pr.author.login}.png?size=48`,
-              profileUrl: `https://github.com/${pr.author.login}`,
-            }
-          : null,
+        authors,
       });
     }