import type { InstalledPkg } from "./package.ts";
export declare function splitNpmSource(spec: string): [name: string, version: string];
/**
 * True when a configured npm: source pins an exact version, e.g.
 * "npm:@scope/pkg@1.2.3" vs. the floating "npm:@scope/pkg". `pi update`
 * intentionally leaves pinned sources unchanged (see readInstalledPackages)
 * but still exits 0 and prints "Updated <source>" either way -- callers
 * must not treat that text as proof anything changed.
 */
export declare function isPinnedNpmSource(source: string): boolean;
/** The bare npm package name for a configured npm: source, pinned or not.
 * undefined for git:/https: sources -- there is no npm-registry name to read. */
export declare function npmPackageName(source: string): string | undefined;
/** Reads a single npm package's real on-disk resolved version, regardless of
 * whether its configured source is pinned -- ground truth for detecting
 * whether an update actually changed anything. undefined for non-npm
 * sources or when node_modules has no matching package.json to read. */
export declare function readResolvedVersion(piHome: string, source: string): string | undefined;
export declare function readResolvedIntegrity(piHome: string, source: string): string | undefined;
export declare function readPackageDeclarations(piHome: string): string[];
export declare function readInstalledPackages(piHome: string): InstalledPkg[];
/**
 * Global scope alone is invisible to a project's own .pi/settings.json pin --
 * confirmed live: a project pinned a stale major version of a since-split
 * package, and nothing in packed's own drift detection ever saw it. Merges
 * global and (when given) project-scoped declarations, tagging each so a
 * name pinned differently in each scope is reported twice, not silently
 * deduped into one.
 */
export declare function readInstalledPackagesAcrossScopes(piHome: string, projectRoot?: string): InstalledPkg[];
export declare function defaultPiHome(): string;
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