export interface ApprovalDetailContext {
    workspaceDir?: string;
    device?: {
        host: string;
        user?: string;
        port?: number;
    } | null;
}
/**
 * Compute a unified-diff-style output for files being edited/written.
 * Uses longest-common-subsequence (LCS) for compact diff generation.
 *
 * Returns null if:
 * - oldText or newText exceeds MAX_DIFF_INPUT_LINES (400 lines)
 *   → Indicates file is too large for inline diff; caller will show summary instead
 *
 * Each diff line is prefixed with:
 * - '- ' for deleted lines
 * - '+ ' for added lines
 * - '  … (N unchanged lines)' for runs of unchanged context
 *
 * @param oldText Previous file content
 * @param newText New file content
 * @returns Diff lines formatted for approval display, or null if inputs too large
 */
export declare function diffLinesForApproval(oldText: string, newText: string): string[] | null;
/**
 * Build formatted detail lines for tool approval display.
 *
 * Generates visual summary of what a tool will do based on side effect class and tool name.
 * Calls specialized detail generators (deviceDetail, diffLinesForApproval, etc.) which return:
 * - Null: no details available for this tool
 * - Empty array: tool matches but has no relevant inputs
 * - Lines: formatted strings ready for display
 *
 * All lines are:
 * - Sanitized (secrets removed)
 * - Truncated at MAX_LINE_CHARS characters with ellipsis
 * - Capped at MAX_DETAIL_LINES total (excess lines replaced with "… +N more lines" marker)
 *
 * @param toolName Tool identifier (e.g., 'edit_file', 'apply_patch', 'ssh_command')
 * @param sideEffect Side effect class (readonly, local_write, device_mutation, etc.)
 * @param input Tool input parameters
 * @param ctx Approval detail context (workspace path, connected device)
 * @returns Formatted lines ready for display in approval prompt
 */
export declare function buildApprovalDetailLines(toolName: string, sideEffect: string, input: Record<string, unknown>, ctx?: ApprovalDetailContext): string[];
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