• Add the entire Remnant classmod into a new, separate sheet tab so no existing data or formulas are overwritten. • Follow the formatting conventions already used in other classmod tabs (fonts, borders, color coding, layout). • Create unique named ranges for all Remnant values, features, and scaling tables to avoid conflicts with existing classes. • Do not modify or delete any existing formulas, scripts, triggers, or backend tabs unless explicitly told to. • Keep all new formulas isolated to the Remnant tab or a dedicated backend tab; avoid embedding new logic into core sheets. • Link Remnant data to the main character sheet using pull formulas (e.g., VLOOKUP, INDEX/MATCH) instead of altering core logic. • Ensure Remnant integrates cleanly with leveling, chakra scaling, DC calculations, class features, and any automation already in place. • Add any Remnant‑specific resources (e.g., Remnant Points, Agony/Resonance meters) as new fields with unique identifiers. • Make sure new mechanics do not override or interfere with other class triggers or multiclassing logic. • Test for circular references, broken links, overwritten ranges, or disrupted dropdowns/validation rules. • Document all new tabs, named ranges, formulas, and any script additions so future maintainers understand the structure. • Provide a short summary of what was added and keep a backup copy of the sheet before integration for rollback safety.