/** Upstream's per-project config filename at the project root. */
export declare const CODEGRAPH_PROJECT_CONFIG_FILENAME = "codegraph.json";
/** Upstream's config filename inside `.codegraph/`. */
export declare const CODEGRAPH_DIR_CONFIG_FILENAME = "config.json";
/**
 * How this upstream's `include` list relates to being indexed.
 *
 *   - `force-include`    — 1.6.x. Selection is `.gitignore`-driven; `include`
 *                          can only ADD files to the index, never withhold
 *                          one. Config lives at `<root>/codegraph.json`.
 *   - `include-whitelist`— 0.7.x. `include` decides which tracked files are
 *                          indexed, so its gaps are real omissions. Config
 *                          lives at `<root>/.codegraph/config.json`.
 */
export type CodegraphConfigModel = 'force-include' | 'include-whitelist';
export type CodegraphConfigSource = {
    /** Absolute path of the file upstream reads for this project. */
    readonly configPath: string;
    /** True when that file exists. Its ABSENCE is meaningful in both models. */
    readonly present: boolean;
    readonly model: CodegraphConfigModel;
};
/** The model implied by an upstream `dist/` directory, or `null` when there is none. */
export declare function codegraphConfigModelFor(moduleDir: string): CodegraphConfigModel | null;
/** Where the config lives under `model`. Pure: no fs. */
export declare function codegraphConfigPathFor(projectRoot: string, model: CodegraphConfigModel): string;
/**
 * Resolve the source for a KNOWN model. A parameter rather than a lookup so a
 * caller that has already probed upstream (or a test driving both models) does
 * not have to reach the installed package twice, and so the model can never
 * disagree with the path derived from it.
 */
export declare function codegraphConfigSourceFor(projectRoot: string, model: CodegraphConfigModel): CodegraphConfigSource;
/** `codegraphConfigSourceFor` for whichever config model this install runs. */
export declare function resolveCodegraphConfigSource(projectRoot: string): CodegraphConfigSource;