/**
 * Installs the git hooks that feed the Brain without anyone remembering to: post-commit ingests
 * the new commit, post-merge/post-checkout pull the team's shared memories (`.lemma-brain/`).
 *
 * `lemma-brain-ingest` shipped with a post-commit recipe in its header comment and nothing ever
 * installed it — on the author's own machine the corpus held 0 commit memories. This is the
 * missing install step, with the constraints a hook installer owes the repo it touches:
 *
 *  - Append, never overwrite. An existing hook keeps running exactly as before; Lemma's part is
 *    one delimited block, and re-running init replaces that block in place (idempotent).
 *  - Never break a commit. Every line is guarded by `command -v`, backgrounded, and silenced.
 *  - Respect `core.hooksPath`. `git rev-parse --git-path hooks` resolves it; when it points inside
 *    the working tree (husky and friends — versioned hooks), the files are the team's, so they are
 *    left alone and the caller gets the lines to add instead.
 */
export interface HookInstallResult {
    installed: string[];
    updated: string[];
    unchanged: string[];
    /** Set when hooks live in a versioned directory Lemma won't write to; holds what to add by hand. */
    manual?: {
        hooksDir: string;
        snippet: string;
    };
    skippedReason?: string;
}
export declare function installBrainHooks(cwd?: string): HookInstallResult;
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