/**
 * Resolved .gitmem directory path
 *
 * Solves: process.cwd() changes when agents cd into other repos (e.g., /workspace/gitmem),
 * but .gitmem/ was created in the project root.
 * The MCP server is long-running, so we resolve the path once and cache it.
 *
 * Resolution order:
 * 1. GITMEM_DIR env var (explicit override)
 * 2. Cached path from session_start (most reliable — session_start created the directory)
 * 3. Walk up from process.cwd() looking for existing .gitmem/ sentinels (backward compat)
 * 4. Fall back to ~/.gitmem (developer-scoped, survives across projects/containers)
 */
/**
 * Validate a string intended for use as a single path component (directory name or filename).
 * Rejects path traversal sequences, directory separators, and null bytes.
 * Throws on invalid input — callers should validate before reaching this layer.
 */
export declare function sanitizePathComponent(value: string, label: string): string;
/**
 * Set the .gitmem directory path (called by session_start after creating it)
 */
export declare function setGitmemDir(dir: string): void;
/**
 * Get the resolved .gitmem directory path
 *
 * Resolution order:
 * 1. GITMEM_DIR env var (explicit override)
 * 2. Cached path from session_start (most reliable)
 * 3. Walk up from CWD looking for existing .gitmem/ sentinels (backward compat)
 * 4. Fall back to ~/.gitmem (developer-scoped, survives across projects/containers)
 */
export declare function getGitmemDir(): string;
/**
 * Get a file path within the .gitmem directory
 */
export declare function getGitmemPath(filename: string): string;
/**
 * Get the per-session directory path: .gitmem/sessions/<sessionId>/
 * Creates the directory if it doesn't exist.
 */
export declare function getSessionDir(sessionId: string): string;
/**
 * Get a file path within a per-session directory.
 */
export declare function getSessionPath(sessionId: string, filename: string): string;
/**
 * Read the "project" field from .gitmem/config.json.
 * Returns null if the file doesn't exist or has no project field.
 *
 * Precedence (handled by callers): explicit param > config.json > "default"
 */
export declare function getConfigProject(): string | null;
/**
 * Check if feedback submission is enabled in .gitmem/config.json
 */
export declare function isFeedbackEnabled(): boolean;
/**
 * Get the install_id from .gitmem/config.json (anonymous install identifier)
 */
export declare function getInstallId(): string | null;
/**
 * Clear the cached path (for testing)
 */
export declare function clearGitmemDirCache(): void;
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