/**
 * Case Conversion Utilities
 *
 * Canonical implementations of string case conversion functions
 * shared across the monorepo. All packages should import from
 * @fjall/util rather than maintaining local copies.
 */
/**
 * Convert hyphenated/underscored names to PascalCase.
 * e.g., "my-app" -> "MyApp", "my_app" -> "MyApp"
 */
export declare function toPascalCase(str: string): string;
/**
 * Convert any case (PascalCase, camelCase, kebab-case, snake_case) to kebab-case.
 * Three-pass regex: split acronyms, split camel boundaries, replace separators.
 * e.g., "MyApp" -> "my-app", "AWSLambda" -> "aws-lambda", "myApp" -> "my-app"
 */
export declare function toKebab(str: string): string;
/**
 * Convert a name to a valid RDS database name (snake_case).
 * RDS API allows letters, numbers, and underscores for PostgreSQL/MySQL DatabaseName.
 * Hyphens are rejected, so convert them to underscores.
 */
export declare function toValidDatabaseName(name: string): string;
/**
 * Convert any case (PascalCase, camelCase, kebab-case, snake_case) to
 * SCREAMING_SNAKE_CASE. Used for environment-variable name derivation.
 * e.g., "MyApp" -> "MY_APP", "data-platform" -> "DATA_PLATFORM".
 */
export declare function toScreamingSnake(str: string): string;
/**
 * Capitalise the first character of a string.
 */
export declare function capitalise(str: string): string;
/**
 * Strip dots from a zone name to produce a safe string for construct IDs.
 * e.g., "example.com" -> "examplecom"
 */
export declare function getSafeZoneName(zoneName: string): string;
/**
 * Normalise an account name to its canonical construct key: lowercase with every
 * non-alphanumeric character stripped. Single source of truth for case- and
 * separator-insensitive account identity; matched to the SQL expression in the
 * `ConnectedAwsAccount_org_normalised_name_unique` functional unique index — the two
 * MUST move together.
 *
 * The two normalisers are identical **for ASCII input**, where JS `toLowerCase()`
 * and PostgreSQL `lower()` agree regardless of collation. They are NOT guaranteed
 * identical for non-ASCII input: `lower()` depends on the database `lc_ctype` /
 * collation provider. Empirically (PG 17, 2026-05-30) the deployed RDS default
 * (`en_US.UTF-8`, libc provider) agrees with JS on every tested candidate, but the
 * `C`/`POSIX` locale diverges — e.g. Turkish dotted `İ` (U+0130) folds to `i` in JS
 * but is left intact (then stripped) by `lower()` under `C`. Use
 * `hasAsciiStableConstructKey` at write boundaries to keep the two engines in
 * lock-step regardless of the deployed collation.
 *
 * Pure — never throws; empty-key rejection lives in the consumers.
 * e.g., "My-Prod" -> "myprod", "My Prod" -> "myprod", "Production" -> "production"
 */
export declare function accountConstructKey(name: string): string;
/**
 * True when an account name's construct key is drawn only from ASCII alphanumerics —
 * i.e. JS `toLowerCase()` and SQL `lower()` are guaranteed to produce the same key
 * regardless of the database collation, so the `@fjall/util` normaliser and the
 * `ConnectedAwsAccount_org_normalised_name_unique` SQL index cannot diverge on this
 * name. Also rejects names whose construct key is empty.
 *
 * Rejects only genuinely divergent names (e.g. Kelvin sign U+212A or Turkish `İ` as
 * the sole alnum source) — names like "Café-Prod" still pass, because the `é` is
 * stripped identically by `[^a-z0-9]` on both sides
 * (`accountConstructKey("Café-Prod") === "cafprod"`).
 */
export declare function hasAsciiStableConstructKey(name: string): boolean;