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Deleted `isEmpty` and all associated tests/examples from the `type` category. The per-category replacements (`array/isEmpty`, `string/isEmpty`, `object/isEmpty`) have been available since 2.0.0 and carry the same JSDoc. Breaking change for v3. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Deleted `safeDate` and `dateToISOString` (both in `date/safeDate.ts`) along with their test file. Replacements available since v1.9.0: - `safeDate` → `ensureDate` - `dateToISOString` → `toISO8601` (date/format) Breaking change for v3. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Removed the `daysDifference` function from `difference.ts`, deleted its dedicated example file, and stripped all daysDifference describe blocks from `.test.ts` and `.spec.ts`. The replacement `difference` (available since 2.0.0) covers the same use-case with a richer API (unit, sign). Breaking change for v3. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Removed the `deepClone` re-export alias from `cloneDeep.ts`. Replacement `cloneDeep` has been the canonical name since the symbol was deprecated (marked `@deprecated` since v1.9.0). Breaking change for v3. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Removed the `deepMerge` re-export alias from `mergeDeep.ts`. Replacement `mergeDeep` has been the canonical name since the symbol was deprecated (marked `@deprecated` since v1.9.0). Breaking change for v3. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Created `helpers/_shared/_unsafeKeys.ts` as the single source of truth for the prototype-pollution guard keys. All consumers (`array/countBy`, `object/map|cloneDeep|mergeDeep|groupBy|set|invert|_types`) now import from `'../_shared/_unsafeKeys.js'`; the file is inlined into each category bundle at compile time so there is no runtime cross-package dependency. Deleted the two duplicated copies `array/_unsafeKeys.ts` and `object/_unsafeKeys.ts`. The build script now explicitly skips any directory whose name starts with `_` to prevent accidental packaging of internal shared directories. Breaking change for v3. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Moved all 141 runtime type-guard files (`is*`) from `helpers/type/` to the new `helpers/guard/` category. The compile-time utility types (`DeepPartial`, `DeepWritable`, `Maybe`) remain in `helpers/type/`, which now has a focused purpose. - New package: `@helpers4/guard` (was `@helpers4/type` for runtime guards) - `helpers/guard/config.json` created - `helpers/type/config.json` updated to reflect compile-time-only purpose Breaking change for v3: consumers of runtime guards must update their import from `@helpers4/type` to `@helpers4/guard`. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The `helpers/type/` category is now exclusively compile-time TypeScript utility types — zero runtime footprint, always imported with `import type`. Existing types kept: - `DeepPartial`, `DeepWritable`, `Maybe` Promoted from internal `object/_types.ts` (standalone, no cross-package dep): - `UnionToIntersection<U>` — collapses A | B | C → A & B & C - `DeepGet<T, Path>` — value type at a path within T - `DeepSet<T, Path, V>` — produces T with value at Path replaced by V (`ParsePath` stays internal to object/ — too path-specific) New utility types added: - `Brand<T, B>` — nominal typing via phantom tag - `Prettify<T>` — flattens intersections for IDE readability - `Nullable<T>` / `Nullish<T>` — `T | null` / `T | null | undefined` - `ValueOf<T>` — union of all value types of an object type - `KeysOfType<T, V>` — keys whose values extend V - `PickByValue<T, V>` / `OmitByValue<T, V>` — filter by value type - `RequiredKeys<T>` / `OptionalKeys<T>` — required/optional key sets Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The inner callbacks of `truthyPromiseOrThrow`, `falsyPromiseOrThrow`, and `meaningPromiseOrThrow` previously typed `data` as `unknown` and returned it with `as T` — an unsound cast invisible at the call site. Fix: type `data` as `T` directly in the returned closure (matching the outer overload signature). No cast needed; TypeScript infers the return correctly. The now-redundant `as T` / `as any[]` / `as object` annotations and their `eslint-disable` suppressions are removed. `meaningPromiseOrThrow` additionally extracts the predicate into a private `isMeaningless(value: unknown): boolean` helper, eliminating all remaining casts in the function body. Only `functional/no-throw-statement` comments remain — they suppress a rule about `throw` style, not a type issue. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
helpers/_shared/ is an internal utility folder — not a publishable category and has no config.json by design. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- simplify repository purpose and stack - refine key commands and rules - remove critical restrictions and organization context
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