/**
 * Phase 189 — CONTRIBUTING.md scaffold. `cadence init` writes a
 * CONTRIBUTING.md at the repo root with a managed region delimited by these
 * markers, pointing the next teammate who clones the repo (with `.cadence/`
 * already committed) at `cadence onboard` for per-machine setup instead of
 * `cadence init` (which refuses once `.cadence/` exists). A CONTRIBUTING.md
 * with no markers is treated as fully user-owned and left untouched — same
 * merge contract as `claude-md-template.ts`, deliberately duplicated below
 * (not imported) because it targets a different file with different
 * content and no shared `--contributing-md` regeneration flag.
 */
export declare const MANAGED_START = "<!-- cadence:managed:start -->";
export declare const MANAGED_END = "<!-- cadence:managed:end -->";
export interface ContributingMdOptions {
    projectName: string;
}
/** The managed block (markers inclusive). */
export declare function renderManagedBlock(opts: ContributingMdOptions): string;
/** Full default file when no CONTRIBUTING.md exists yet. */
export declare function renderContributingMd(opts: ContributingMdOptions): string;
export type MergeMode = 'created' | 'regenerated' | 'preserved';
export interface MergeResult {
    content: string;
    mode: MergeMode;
}
/**
 * Merge a fresh managed block into an existing CONTRIBUTING.md.
 *
 * - no existing file (empty/whitespace) → full render (`created`)
 * - both markers present → replace the inclusive span, keep prefix/suffix
 *   byte-for-byte (`regenerated`)
 * - content present but markers absent → return unchanged (`preserved`)
 */
export declare function mergeManagedBlock(existing: string | null, opts: ContributingMdOptions): MergeResult;
/**
 * Merge the managed onboarding block into `<cwd>/CONTRIBUTING.md`, creating
 * the file if absent. Mirrors `writeClaudeMd`/`writeAgentsMd` in `init.ts`,
 * but — unlike those — owns its own read/write since it has no standalone
 * `--contributing-md` regeneration flag to share the merge helper with.
 */
export declare function writeContributingMd(cwd: string, opts: ContributingMdOptions): Promise<MergeMode>;
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