Writing and running Playwright E2E tests for the web app
Modifying or adding damage calculation formulas (damageFormula.ts + damageCalculator.ts)
Adding passive skill / inner way code changes (modifier engine, skill context, types, not data)
Adding new stats to the game (constants.ts + types.ts + gear/OCR/tune files)
Editing game data through admin panel (skills, passives, inner ways, martial arts, rotations)
Running and writing tests for the project (vitest, node env, globals)
Working with gear tune features (tune variants, success rate, tune history in optimizer + UI)