/**
 * Git operations for wave sub-agent groups.
 *
 * All commands use executeCommand() from src/utils/command.ts.
 * No direct child_process usage.
 */
/**
 * Ensure the .worktree root directory exists.
 */
export declare function ensureWorktreeRoot(baseCwd: string): void;
/**
 * Create a Git worktree with a new branch.
 *
 * @param baseCwd - The repository root
 * @param groupId - Group identifier (used for branch name)
 * @param groupName - Group alias (used for directory name)
 * @param baseCommit - The commit SHA to base the new branch on
 * @returns The absolute path to the created worktree
 */
export declare function createWorktree(baseCwd: string, groupId: string, groupName: string, baseCommit: string): Promise<string>;
/**
 * Check if a worktree directory exists on disk.
 */
export declare function worktreeExists(baseCwd: string, groupId: string, groupName: string): boolean;
/**
 * Resolve the base commit for a new group.
 *
 * Rules:
 * 1. No dependencies: use HEAD of the current branch
 * 2. Single dependency: use HEAD of the dep's branch
 * 3. Multiple dependencies: validate linear ancestry, use most recent
 *
 * @param baseCwd - The repository root
 * @param dependsOn - Array of dependency group IDs
 * @param depBranches - Map from group ID to branch name
 */
export declare function resolveBaseCommit(baseCwd: string, dependsOn: string[], depBranches?: Map<string, string>): Promise<string>;
/**
 * Validate that all given commit SHAs form a linear ancestry chain.
 * Throws if any pair is not an ancestor relationship.
 */
export declare function validateLinearAncestry(baseCwd: string, shas: string[]): Promise<void>;
/**
 * Get HEAD of the current branch.
 */
export declare function getHead(baseCwd: string): Promise<string>;
/**
 * Get the HEAD SHA of a branch.
 */
export declare function getBranchHead(baseCwd: string, branch: string): Promise<string>;
/**
 * Stage all changes and commit.
 *
 * @returns The commit SHA, or null if nothing to commit.
 */
export declare function commitChanges(worktreePath: string, groupId: string, agentCount: number, successCount: number): Promise<string | null>;
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