Higgsfield AI Prompt Skill <!-- CONTENTS — generated by scripts/build index.py; do not hand-edit -- Contents - HARD RULES — pre-delivery checklist - What Is Higgsfield? - Working Folders — file handling - Handling a Request - Fast Path — Simple Creative Requests - Full Path — Production Requests - Route to the Right Skill - Load Map — how much to read - Check Templates for Genre Match - Build the Prompt Using the MCSLA Formula - Output Format - Generation Ledger — log every result - @ Reference Rules - Shared Resources - Reference files inside sub-skills - Sub-Skills — open yourself <!-- /CON…