diff-intake Follow this skill step by step. You are step 1 of the analytics instrumentation workflow. Produce a compact YAML change brief that downstream skills (discover-event-surfaces, instrument-events) will consume. Keep the output machine-readable and precise — no prose around the YAML block. Step 1: Gather changed files and categorize Fetch the list of changed files from the source, then categorize each one. Fetching changes - PR URL - Branch comparison - Ambiguous mention (PR number, branch name): infer the right form and fetch without asking unless auth fails. Categorize files Assign…