Kill the Standup

Read yesterday's Linear issues and GitHub commits. Format a standup update. Post it to Slack.

Step 1: Setup Check

Confirm required env vars are set:

echo "LINEAR_API_KEY: ${LINEAR_API_KEY:+set}"
echo "SLACK_WEBHOOK_URL: ${SLACK_WEBHOOK_URL:+set}"
echo "GITHUB_REPO: ${GITHUB_REPO:-not set}"
echo "GITHUB_USERNAME: ${GITHUB_USERNAME:-not set}"

If LINEAR_API_KEY is missing: Stop. Tell the user: "LINEAR_API_KEY is required. Get it from Linear → Settings → API → Personal API keys. Add it to your .env file."