/**
 * Linguistic Helpers
 *
 * Utilities for verb conjugation, noun pluralization, and linguistic inference.
 * Used for auto-generating forms, events, and semantic metadata.
 *
 * @packageDocumentation
 */
/**
 * Capitalize the first letter of a string
 */
export declare function capitalize(s: string): string;
/**
 * Preserve the case of the original string in the replacement
 */
export declare function preserveCase(original: string, replacement: string): string;
/**
 * Check if a character is a vowel
 */
export declare function isVowel(char: string | undefined): boolean;
/**
 * Split a PascalCase or camelCase string into words
 *
 * @example
 * ```ts
 * splitCamelCase('BlogPost')   // => ['Blog', 'Post']
 * splitCamelCase('userProfile') // => ['user', 'Profile']
 * ```
 */
export declare function splitCamelCase(s: string): string[];
/**
 * Convert words to kebab-case (URL-safe slug)
 *
 * @example
 * ```ts
 * toKebabCase('Blog Post')  // => 'blog-post'
 * toKebabCase('BlogPost')   // => 'blog-post'
 * ```
 */
export declare function toKebabCase(s: string): string;
/**
 * Convert verb to past participle (create → created, publish → published)
 *
 * @example
 * ```ts
 * toPastParticiple('create')  // => 'created'
 * toPastParticiple('publish') // => 'published'
 * toPastParticiple('submit')  // => 'submitted'
 * ```
 */
export declare function toPastParticiple(verb: string): string;
/**
 * Convert verb to actor noun (create → creator, publish → publisher)
 *
 * @example
 * ```ts
 * toActor('create')   // => 'creator'
 * toActor('publish')  // => 'publisher'
 * toActor('submit')   // => 'submitter'
 * ```
 */
export declare function toActor(verb: string): string;
/**
 * Convert verb to present 3rd person (create → creates, publish → publishes)
 *
 * @example
 * ```ts
 * toPresent('create')  // => 'creates'
 * toPresent('publish') // => 'publishes'
 * toPresent('carry')   // => 'carries'
 * ```
 */
export declare function toPresent(verb: string): string;
/**
 * Convert verb to gerund (create → creating, publish → publishing)
 *
 * @example
 * ```ts
 * toGerund('create')  // => 'creating'
 * toGerund('publish') // => 'publishing'
 * toGerund('run')     // => 'running'
 * ```
 */
export declare function toGerund(verb: string): string;
/**
 * Convert verb to result noun (create → creation, publish → publication)
 *
 * @example
 * ```ts
 * toResult('create')    // => 'creation'
 * toResult('publish')   // => 'publication'
 * toResult('generate')  // => 'generation'
 * ```
 */
export declare function toResult(verb: string): string;
/**
 * Auto-pluralize a noun
 *
 * @example
 * ```ts
 * pluralize('post')     // => 'posts'
 * pluralize('category') // => 'categories'
 * pluralize('person')   // => 'people'
 * pluralize('child')    // => 'children'
 * ```
 */
export declare function pluralize(singular: string): string;
/**
 * Auto-singularize a noun (reverse of pluralize)
 *
 * @example
 * ```ts
 * singularize('posts')      // => 'post'
 * singularize('categories') // => 'category'
 * singularize('people')     // => 'person'
 * ```
 */
export declare function singularize(plural: string): string;
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