/**
 * Merge primitive for the generated instruction files (CLAUDE.md,
 * .agents/shared_instructions.md) that mix monomind's own body with
 * hand-authored project content.
 */
/**
 * Confines generated content to a delimited
 * `<!-- monomind-block:<marker> -->` / `<!-- /monomind-block:<marker> -->`
 * pair within a file that may otherwise hold hand-authored content, so a
 * `--force` refresh only ever touches that one block. In order:
 *
 *  1. An unmarked body left by a pre-delimiter version is replaced in place
 *     (or, when a delimited block already exists elsewhere in the file,
 *     simply removed — that is the shape GH #276 produced, and it heals back
 *     to a single copy).
 *  2. A same-marker block in the current form is refreshed in place.
 *  3. A same-marker block in the older `monomind:start`/`monomind:end` form is
 *     migrated to the current form, in place.
 *  4. Otherwise the block is appended after whatever content already exists
 *     (verbatim, never modified).
 *
 * Every path is idempotent: a second run matches case 2 and rewrites byte-for-
 * byte identical content. Content outside the block is never touched.
 *
 * The delimiter text is deliberately NOT the `monomind:start <name>`
 * convention platform-adapters/merge.ts uses for its own instruction blocks:
 * that text is also matched, none too precisely, by the legacy bare-block
 * migration regexes in platform-adapters/migration.ts, which would treat a
 * newly-introduced `# monomind:start <name>` block as an old-style *bare*
 * block to migrate and could mangle it into an unrelated `instructions:*`
 * block. Distinct delimiter text sidesteps that rather than taking on a
 * dependency on that subsystem.
 */
export declare function dropLegacyUnmarked(text: string, generated: string): string;
/**
 * Swaps an undelimited generated body for `block`, keeping its position in the
 * file, or reports that there is none to swap (`null`) so the caller can fall
 * back to appending. Callers owning a different delimiter form reuse this and
 * `dropLegacyUnmarked` to get the same conservative detection — see
 * platform-adapters/merge.ts for the skill writer (GH #286).
 */
export declare function replaceLegacyUnmarked(text: string, generated: string, block: string): string | null;
/** The body of the current-form `marker` block in `text`, or null if absent. */
export declare function readGeneratedBlock(text: string, marker: string): string | null;
export declare function mergeGeneratedBlock(existing: string, marker: string, generated: string): string;
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