chore: add tweet posting script for autonomous social updates (#11)

Adds scripts/tweet.ts — posts to @swfactory_dev via Twitter API v2
with OAuth 1.0a. Called by the Tweet Drafter automation as:
  npx tsx scripts/tweet.ts "<tweet text>"

Requires TWITTER_CONSUMER_KEY, TWITTER_SECRET_KEY,
TWITTER_ACCESS_TOKEN, TWITTER_ACCESS_TOKEN_SECRET env vars.

Co-authored-by: Ona <no-reply@ona.com>

Author: zacharias-ona

package.json

@@ -32,6 +32,7 @@
     "jsdom": "^29.0.2",
     "playwright": "^1.59.1",
     "tailwindcss": "^4",
+    "twitter-api-v2": "^1.29.0",
     "typescript": "^5",
     "vitest": "^4.1.4"
   }

pnpm-lock.yaml

@@ -0,0 +1,62 @@
+/**
+ * Post a tweet to @swfactory_dev via Twitter API v2.
+ *
+ * Usage: npx tsx scripts/tweet.ts "Your tweet text here"
+ *
+ * Required env vars (OAuth 1.0a User Context):
+ *   TWITTER_CONSUMER_KEY
+ *   TWITTER_SECRET_KEY
+ *   TWITTER_ACCESS_TOKEN
+ *   TWITTER_ACCESS_TOKEN_SECRET
+ */
+
+import { TwitterApi } from "twitter-api-v2";
+
+const text = process.argv[2];
+
+if (!text) {
+  console.error("Usage: npx tsx scripts/tweet.ts <text>");
+  process.exit(1);
+}
+
+if (text.length > 280) {
+  console.error(`Tweet is ${text.length} chars (max 280). Trim it first.`);
+  process.exit(1);
+}
+
+const required = [
+  "TWITTER_CONSUMER_KEY",
+  "TWITTER_SECRET_KEY",
+  "TWITTER_ACCESS_TOKEN",
+  "TWITTER_ACCESS_TOKEN_SECRET",
+] as const;
+
+const missing = required.filter((k) => !process.env[k]);
+if (missing.length) {
+  console.error(`Missing env vars: ${missing.join(", ")}`);
+  process.exit(1);
+}
+
+const client = new TwitterApi({
+  appKey: process.env.TWITTER_CONSUMER_KEY!,
+  appSecret: process.env.TWITTER_SECRET_KEY!,
+  accessToken: process.env.TWITTER_ACCESS_TOKEN!,
+  accessSecret: process.env.TWITTER_ACCESS_TOKEN_SECRET!,
+});
+
+async function main() {
+  try {
+    const { data } = await client.v2.tweet(text);
+    const url = `https://x.com/swfactory_dev/status/${data.id}`;
+    console.log(`Posted: ${url}`);
+  } catch (err: unknown) {
+    if (err instanceof Error) {
+      console.error(`Failed to post tweet: ${err.message}`);
+    } else {
+      console.error("Failed to post tweet:", err);
+    }
+    process.exit(1);
+  }
+}
+
+main();