/**
 * Vetted-parser YAML helpers for the manifest-edge extractors. Replaces the
 * prior line scanner, which understood only `key: value` / `- item` lines and a
 * single-line flow list, silently missing block sequences nested under maps,
 * flow collections, multi-line scalars, and anchors — dropping the path edges
 * those YAML configs declare (A5+A11). `yaml` (eemeli) is a pure-JS,
 * spec-compliant parser. All helpers degrade to empty on malformed input: the
 * graph builder treats an unparseable manifest as declaring no edges, never
 * throwing.
 */
/** Parse YAML, degrading to `undefined` on malformed input (never throws). */
export declare function parseYamlSafe(content: string): unknown;
/** The top-level object value of a parsed YAML document, or undefined. */
export declare function yamlRootObject(content: string): Record<string, unknown> | undefined;
/** Coerce a YAML value to a string[]: a scalar → `[s]`, a sequence → its strings. */
export declare function yamlStringArray(value: unknown): string[];
/**
 * Every string SCALAR VALUE reachable in a parsed YAML value, walked depth-first
 * through maps and sequences (map keys are not collected — only values, matching
 * the prior extractor that read the value side of `key: value` and list items).
 * Nested structures the line scanner could not reach are now included.
 */
export declare function collectYamlStringScalars(value: unknown, out?: string[]): string[];
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