/**
 * External package extractor.
 *
 * Parses package manifests (npm, pip, cargo, go) to build a flat list
 * of direct dependencies. No LLM required — pure filesystem reads.
 *
 * Each manifest kind has a PURE parser over the file's text, and the directory-based functions read
 * the file and call it. The phantom-reference check (change: add-phantom-reference-findings) reads
 * manifests itself — it needs to know which manifest could not be parsed, which a swallowed error
 * cannot tell it — and parses them with these same functions, so "what counts as declared" has one
 * definition.
 */
export type PackageEcosystem = 'npm' | 'pypi' | 'cargo' | 'go';
export interface ExternalPackage {
    name: string;
    version: string;
    ecosystem: PackageEcosystem;
    isDev: boolean;
}
/**
 * Dependencies a `package.json` declares. Throws on malformed JSON, so a caller that must not treat
 * an unreadable manifest as "declares nothing" can tell the two apart.
 */
export declare function parseNpmManifest(text: string): ExternalPackage[];
/**
 * The body of a TOML table: the lines after its `[header]` line, up to the next line that opens a
 * table. Found without a regex over the content, so no section shape can make it backtrack.
 */
export declare function tomlSection(raw: string, header: string): string;
/**
 * The distribution name a `pyproject.toml` declares, from PEP 621 `[project]` or Poetry's
 * `[tool.poetry]`. A repository importing its own distribution is importing itself, not a
 * dependency.
 */
export declare function parsePyprojectName(raw: string): string | null;
/** Dependencies a `pyproject.toml` declares (PEP 621, extras, dependency groups, Poetry). */
export declare function parsePyprojectManifest(raw: string): ExternalPackage[];
/** Requirements a `requirements.txt`-style file pins, one per line. */
export declare function parseRequirementsManifest(raw: string): ExternalPackage[];
/** The `requirements*.txt` paths, relative to a directory, that {@link extractExternalPackages} reads. */
export declare const REQUIREMENTS_CANDIDATES: readonly string[];
/** Dependencies a `Cargo.toml` declares, including build and workspace sections. */
export declare function parseCargoManifest(raw: string): ExternalPackage[];
/** Modules a `go.mod` requires. */
export declare function parseGoModManifest(raw: string): ExternalPackage[];
export interface ExternalPackageSummary {
    total: number;
    byEcosystem: Partial<Record<PackageEcosystem, number>>;
    packages: ExternalPackage[];
}
export declare function extractExternalPackages(rootDir: string): Promise<ExternalPackageSummary>;
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