LowFile-scopeDart Plug & play

Define reusable constants for repeated values

Create theme-like constants (radii, gaps, durations) and reuse across widgets.

Why this matters

Improves design consistency and eases global tweaks.

Side-by-side examples engineers can pattern-match during review.

Avoid

Container(decoration: BoxDecoration(borderRadius: BorderRadius.circular(12)))

Prefer

class Dimens {
  static const radiusM = Radius.circular(12);
}
Container(decoration: BoxDecoration(borderRadius: BorderRadius.all(Dimens.radiusM)))

Bad

Duration(milliseconds: 200)

Good

const kFast = Duration(milliseconds: 200);

From the same buckets as this rule.

Critical
Avoid Duplicating String Literals
Store repeated string literals in constants or variables to improve maintainability and reduce redundancy.
duplication-complexitymaintainability
Critical
Avoid Redundant `None` Comparisons
Identify cases where `x is None` or `x is not None` is used redundantly when `x` is always or never `None`. This may indicate a deeper logic issue.
duplication-complexityreadability-refactor+1
High
Avoid Functions That Always Return the Same Value
Identify functions that return the same value regardless of input. This may indicate poor design or a logic error.
duplication-complexityreadability-refactor+1