import type { ResolvedUpdater, UpdaterConfig } from './config.js';
export type { ResolvedUpdater } from './config.js';
/**
 * Resolves a `UpdaterConfig` down to what the updater HTTP handler and
 * `murasaki-meta.json` actually need — see contract §3. Signature
 * verification is not optional: there is no config path that skips
 * resolving (and thus requiring) a public key.
 *
 * Resolution order:
 * 1. `updater` absent or `false` → `null` (updater disabled).
 * 2. `repo` and `endpoint` both set → throws.
 * 3. Neither set → read `repository` from `<projectRoot>/package.json`,
 *    normalizing the usual shapes ("owner/repo", "github:owner/repo",
 *    `{ url: "git+https://github.com/owner/repo.git" }`). Throws if nothing
 *    resolves.
 * 4. GitHub mode's `manifestUrl` is a `releases/latest/download/…` (default
 *    channel) or `releases/download/<channel>/…` (named channel) URL — a
 *    fixed GitHub Releases asset URL that always 302s to the newest matching
 *    release, so no GitHub API call, rate limit, or token is needed.
 * 5. `publicKey`: explicit config → `$MURASAKI_UPDATE_PUBLIC_KEY` →
 *    `<projectRoot>/.murasaki/update-key.pub`. Throws (with a `murasaki
 *    release --keygen` pointer) if none is found.
 */
export declare function resolveUpdater(updater: UpdaterConfig | undefined, ctx: {
    projectRoot: string;
}): ResolvedUpdater | null;
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