/**
 * 0.x-aware version bumping, shared by the pinned upgrade Op (#549) and the
 * rolling drift re-baseline (#616). Centralised here so the single source of
 * truth for the semver rule can't drift between the two callers.
 */
/** Surface-change severity that drives a bump. */
export type BumpSeverity = "additive" | "breaking" | "none";
/**
 * Compute a bumped semver from a current version and a surface severity.
 *
 * Pre-1.0 (major 0) never auto-promotes to 1.0.0: breaking → minor, additive →
 * patch. At >= 1.0.0: breaking → major, additive → minor. Returns null for
 * "none" or a version string that can't be parsed as MAJOR.MINOR.PATCH.
 */
export declare function bumpForSeverity(current: string, severity: BumpSeverity): string | null;
/**
 * Read a package.json, set its `version`, and write it back — preserving all
 * other fields, 2-space indent, and a trailing newline.
 */
export declare function bumpPackageJsonVersion(packageJsonPath: string, newVersion: string): void;
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