import { BranchBrainState, BranchMemoryTag } from '../types.js';
export declare class BranchBrain {
    private brain;
    private tags;
    private lastBranchByProject;
    private initialized;
    constructor();
    init(): Promise<void>;
    /** Current branch from git for the given project dir. */
    currentBranch(projectDir: string): Promise<string>;
    /** Tag a memory as either global or branch-scoped. */
    tag(memoryId: string, branch: string, scope?: 'branch' | 'global'): Promise<BranchMemoryTag>;
    /** Return the set of memory IDs active for a branch (branch-scoped + global). */
    activeMemoryIds(branch: string): string[];
    /** Compute + return the current branch brain state. */
    getState(projectDir: string): Promise<BranchBrainState>;
    /** Promote a branch-scoped memory to global (e.g., after merging). */
    promoteToGlobal(memoryId: string): Promise<boolean>;
    private persist;
}
export declare function getBranchBrain(): BranchBrain;
export declare function resetBranchBrainForTests(): void;
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