Apply consistent, type-safe idioms and keep logic/formatting easy to scan. - Prefer the established guard/pattern style: ```ts // preferred if the surrounding code uses boolean guards theme && devtools.setTheme(theme) ``` - Remove redundant casts like `as any` when TypeScript can infer/narrow: ```ts const options = query.options // avoid unnecessary `as any` ``` - Extract and reuse common “value or function” handling instead of repeating `typeof ... === 'function'` checks; use shared helpers (e.g., a `resolveValueOrFunction` utility) across the codebase. - Keep control flow structured: avoid duplicated assignments/notifications and hard-to-follow early returns. Split logic by the primary conditions (e.g., index change vs result change), then assign/notify accordingly. - Enforce consistent formatting/import conventions (grouping, ordering, quote style) to reduce diff noise and improve readability. Use these guidelines to guide refactors during reviews, not only new code.