/**
 * Helpers that add / remove ARE artefacts from project files.
 *
 * Used by `cli/init.ts` (ensure*) and `installer/uninstall.ts` (remove*).
 */
/**
 * Ensure `*.sum` is listed in `.gitignore`.
 *
 * If a `# agents-reverse-engineer` section already exists, appends within it.
 * Otherwise creates the section. Idempotent — skips if already present.
 *
 * @returns true if the file was modified
 */
export declare function ensureGitignoreEntry(root: string): Promise<boolean>;
/**
 * Remove the `# agents-reverse-engineer` section and `*.sum` entry from `.gitignore`.
 *
 * Removes the section header line, the `*.sum` line beneath it, and any resulting
 * excess blank lines. Idempotent — returns false if nothing was changed.
 *
 * @param dryRun - If true, don't write changes
 * @returns true if the file was modified
 */
export declare function removeGitignoreEntry(dryRun: boolean): Promise<boolean>;
/**
 * Ensure `.vscode/settings.json` has `files.exclude["**\/*.sum"] = true`.
 *
 * Creates the file and directory if needed. Handles JSONC (comments,
 * trailing commas) used by VS Code — edits are applied surgically via
 * `jsonc-parser` so existing comments and formatting are preserved.
 * If an existing file cannot be parsed, the file is left untouched.
 * Idempotent.
 *
 * @returns true if the file was modified
 */
export declare function ensureVscodeExclude(root: string): Promise<boolean>;
/**
 * Remove `files.exclude["**\/*.sum"]` from `.vscode/settings.json`.
 *
 * Uses `jsonc-parser` to surgically remove the key while preserving comments
 * and formatting. Cleans up the empty `files.exclude` object if no other keys
 * remain. Idempotent — returns false if nothing was changed.
 *
 * @param dryRun - If true, don't write changes
 * @returns true if the file was modified
 */
export declare function removeVscodeExclude(dryRun: boolean): Promise<boolean>;
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