Weekly new backlinks tracker in Slack and Sheets

Build me a deterministic code workflow that tracks new backlinks to my domain every week. Trigger: a cron schedule that runs every Monday at 6am in my local timezone.

Step 1: Call BuzzSumo's Search Backlinks operation for a configured root domain (make the domain a workflow input). Use the result set as this week's snapshot of backlinks pointing at the domain.

Step 2: Call Google Sheets Get Values on a configured spreadsheet ID and tab (also workflow inputs) to read the existing backlink log. The first column of the log holds source URLs that have already been recorded.

Step 3: Diff the BuzzSumo result set against the logged source URLs to identify backlinks discovered this week (URLs in the BuzzSumo response that are not already in the sheet). Deduplicate within the new set as well.

Step 4: Call Google Sheets Append Values to add one row per new backlink, with these columns in order: source URL, source domain, domain authority, anchor text snippet, evergreen score, discovered_at timestamp (ISO 8601, the time the workflow ran).

Step 5: Call Slack Send a Message to a configured channel (workflow input) with a single summary message. The message should include: the total count of new backlinks this week, a breakdown by domain authority bucket (high = 60+, medium = 30-59, low = under 30), and a link to the Google Sheet. If zero new backlinks were found, post a short message confirming the check ran with no new links.

This is a code workflow, not an agent: every step is a known operation with structured inputs and outputs, no reasoning or drafting is required. Keep the flow strictly deterministic.