Phone Destination Resolver

Turns a free-form voice or LLM call destination into a safe E.164 number, or a refusal.

The dangerous cases are not malformed input. They are premium-rate numbers, international destinations costing a hundred times a domestic call, and internal extensions that reach places an automated caller should not.

Refuses by default and allows by rule, because an outbound dialer that resolves ambiguity optimistically is a billing incident waiting for the right hallucination. 71 tests, the largest suite in this catalog, because the surface is almost entirely edge cases.

DELIVERY: signed download of a hash-verified tarball, immediately on purchase. Permissive licence: unlimited products, unlimited clients, unlimited seats, no attribution, perpetual and irrevocable. One restriction, do not republish the source as source.

Interface

What you call, and what comes back. Types and signatures only — the implementation ships with the source.

  export async function resolveDestination(input: string, deps: ResolverDeps): Promise<ResolveResult>;
  export function normalizeToE164(raw: string): string;

  export type ResolveResult = | { ok: true;