No Unsafe Dictionary Type

Error

small-rules/no-unsafe-dictionary-type

Disallow object-dictionary contracts whose direct value type is unknown, any, object, {}, or a union/alias containing one of those escape hatches.

Rationale

Ported from dmmulroy/anti-slop. A dictionary needs a concrete value contract. unknown, any, object, and empty-object values defer that contract to every reader; parse before insertion instead.

Diagnostic Messages

unsafeDictionary

This dictionary's {{value}} value type gives callers no concrete value contract. Use an owner/schema-derived value type; parse external payloads before insertion.

Configuration

This rule does not accept options.

{
  "jsPlugins": [
    "@pobammer-ts/small-rules"
  ],
  "rules": {
    "small-rules/no-unsafe-dictionary-type": "error"
  }
}

Examples

unknown dictionary values

type Metadata = Record<string, unknown>;

concrete dictionary values

type Commands = Record<string, Command>;