Add interactive release note generator

.gitignore

@@ -41,3 +41,5 @@ packages/react-devtools-inline/dist
 packages/react-devtools-shell/dist
 packages/react-devtools-timeline/dist
 
+scripts/release-notes/node_modules
+scripts/release-notes/state.json

scripts/release-notes/.eslintrc.cjs

@@ -0,0 +1,10 @@
+'use strict';
+
+module.exports = {
+  parserOptions: {
+    sourceType: 'module',
+  },
+  rules: {
+    strict: 'off',
+  },
+};

scripts/release-notes/.gitignore

@@ -0,0 +1 @@
+data/

scripts/release-notes/README.md

@@ -0,0 +1,41 @@
+# Release Notes Generator
+
+Tool for generating release notes.
+
+## Setup
+
+```sh
+cd scripts/release-notes
+yarn install
+```
+
+## Usage
+
+### 1. Generate commit data
+
+```sh
+yarn gen-data -v <version>
+```
+
+This exports all commits since the given git tag to `data/commits.json`. It also resolves GitHub usernames for each commit author via the GitHub API (requires `gh` CLI to be authenticated).
+
+Example:
+```sh
+yarn gen-data -v 19.1.0
+```
+
+### 2. Run the app
+
+```sh
+yarn dev
+```
+
+### 3. Triage commits
+
+- **Include/Reviewed checkboxes** — mark commits to include in the release notes or mark as reviewed (reviewed-only commits fade out)
+- **Tags** — assign custom tags to group related commits together
+- **Filters** — filter the table by text search, reviewed status, category, or tag
+
+## State
+
+Triage state (selections, tags, assignments) is saved to `state.json` automatically. This is gitignored. Regenerating commit data does not affect saved state.

scripts/release-notes/gen-data.mjs

@@ -0,0 +1,144 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import {execSync} from 'child_process';
+import {writeFileSync, mkdirSync} from 'fs';
+import {join, dirname} from 'path';
+import {fileURLToPath} from 'url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const OUTPUT_DIR = join(__dirname, 'data');
+const OUTPUT_FILE = join(OUTPUT_DIR, 'commits.json');
+
+function parseArgs() {
+  const args = process.argv.slice(2);
+  const vIndex = args.indexOf('-v');
+  if (vIndex === -1 || vIndex + 1 >= args.length) {
+    console.error('Usage: node gen-data.mjs -v <version>');
+    console.error('Example: node gen-data.mjs -v 19.2.0');
+    process.exit(1);
+  }
+  return args[vIndex + 1];
+}
+
+function resolveTag(version) {
+  const tag = version.startsWith('v') ? version : `v${version}`;
+  try {
+    execSync(`git tag -l "${tag}" | grep -q .`, {stdio: 'pipe'});
+  } catch {
+    console.error(`Error: git tag "${tag}" not found.`);
+    console.error(
+      'Available recent tags:',
+      execSync('git tag --sort=-creatordate | head -5').toString().trim()
+    );
+    process.exit(1);
+  }
+  return tag;
+}
+
+function resolveGitHubUsernames(commits, repo) {
+  // Dedupe by author name — only need one commit per unique author
+  const authorToHash = new Map();
+  for (const commit of commits) {
+    if (!authorToHash.has(commit.author)) {
+      authorToHash.set(commit.author, commit.fullHash);
+    }
+  }
+
+  const authorToUsername = new Map();
+  const entries = Array.from(authorToHash.entries());
+  console.log(`Resolving GitHub usernames for ${entries.length} unique authors...`);
+
+  for (const [author, hash] of entries) {
+    try {
+      const login = execSync(
+        `gh api repos/${repo}/commits/${hash} --jq '.author.login'`,
+        {stdio: ['pipe', 'pipe', 'pipe'], timeout: 10000}
+      )
+        .toString()
+        .trim();
+      if (login && login !== 'null') {
+        authorToUsername.set(author, login);
+      }
+    } catch {
+      // Silently skip — will fall back to display name
+    }
+  }
+
+  console.log(`Resolved ${authorToUsername.size}/${entries.length} usernames.`);
+  return authorToUsername;
+}
+
+function getCommits(lastRelease) {
+  const listOfCommits = execSync(
+    `git log --pretty=format:"%h|%ai|%aN|%ae" ${lastRelease}...`
+  ).toString();
+
+  const summary = execSync(
+    `git log --pretty=format:"%s" ${lastRelease}...`
+  )
+    .toString()
+    .split('\n');
+
+  const body = execSync(
+    `git log --pretty=format:"%b<!----!>" ${lastRelease}...`
+  )
+    .toString()
+    .split('<!----!>\n');
+
+  const commits = listOfCommits.split('\n').map((commitMessage, index) => {
+    const diffMatch = body[index]?.match(/D\d+/);
+    const diff = diffMatch != null && diffMatch[0];
+    const [hash, date, name] = commitMessage.split('|');
+    return {
+      hash: hash.slice(0, 7),
+      fullHash: hash,
+      summary: summary[index],
+      message: body[index],
+      author: name,
+      diff,
+      date,
+    };
+  });
+
+  return commits;
+}
+
+// Detect the GitHub repo from the git remote
+function getRepo() {
+  try {
+    const remote = execSync('git remote get-url origin', {stdio: 'pipe'})
+      .toString()
+      .trim();
+    const match = remote.match(/github\.com[:/](.+?)(?:\.git)?$/);
+    if (match) return match[1];
+  } catch {
+    // fall through
+  }
+  return 'facebook/react';
+}
+
+const version = parseArgs();
+const lastRelease = resolveTag(version);
+const commits = getCommits(lastRelease);
+const repo = getRepo();
+const usernameMap = resolveGitHubUsernames(commits, repo);
+
+// Attach github username to each commit
+for (const commit of commits) {
+  const username = usernameMap.get(commit.author);
+  if (username) {
+    commit.github = username;
+  }
+}
+
+mkdirSync(OUTPUT_DIR, {recursive: true});
+writeFileSync(OUTPUT_FILE, JSON.stringify({lastRelease, commits}, null, 2));
+
+console.log(
+  `Wrote ${commits.length} commits (since ${lastRelease}) to data/commits.json`
+);

scripts/release-notes/index.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>React Release Notes</title>
+  </head>
+  <body>
+    <div id="app"></div>
+    <script type="module" src="/src/main.jsx"></script>
+  </body>
+</html>

scripts/release-notes/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "release-notes",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "gen-data": "node gen-data.mjs"
+  },
+  "dependencies": {
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0",
+    "@tanstack/react-table": "^8.20.0"
+  },
+  "devDependencies": {
+    "vite": "^6.0.0",
+    "@vitejs/plugin-react": "^4.3.0"
+  }
+}

scripts/release-notes/plugins/api.js

@@ -0,0 +1,72 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import {readFileSync, writeFileSync, existsSync} from 'fs';
+import {join} from 'path';
+
+const STATE_FILE = join(process.cwd(), 'data', 'state.json');
+
+function getDefaultState() {
+  return {
+    includedCommits: {},
+    reviewedCommits: {},
+    customTags: [],
+    tagAssignments: {},
+  };
+}
+
+function readState() {
+  if (existsSync(STATE_FILE)) {
+    try {
+      return JSON.parse(readFileSync(STATE_FILE, 'utf-8'));
+    } catch {
+      return getDefaultState();
+    }
+  }
+  return getDefaultState();
+}
+
+function writeState(state) {
+  writeFileSync(STATE_FILE, JSON.stringify(state, null, 2));
+}
+
+export default function apiPlugin() {
+  return {
+    name: 'release-notes-api',
+    configureServer(server) {
+      server.middlewares.use((req, res, next) => {
+        if (req.url === '/api/state' && req.method === 'GET') {
+          const state = readState();
+          res.setHeader('Content-Type', 'application/json');
+          res.end(JSON.stringify(state));
+          return;
+        }
+
+        if (req.url === '/api/state' && req.method === 'POST') {
+          let body = '';
+          req.on('data', chunk => {
+            body += chunk;
+          });
+          req.on('end', () => {
+            try {
+              const state = JSON.parse(body);
+              writeState(state);
+              res.setHeader('Content-Type', 'application/json');
+              res.end(JSON.stringify({ok: true}));
+            } catch {
+              res.statusCode = 400;
+              res.end(JSON.stringify({error: 'Invalid JSON'}));
+            }
+          });
+          return;
+        }
+
+        next();
+      });
+    },
+  };
+}