/**
 * Thin parse-diff wrapper for `diff-semantic-index`.
 *
 * Converts raw `git diff` text into a structured summary that the LLM
 * handler can use as a pre-processed prompt prefix (paths, line counts, roles)
 * instead of forcing the model to scan raw unified-diff bytes.
 *
 * parse-diff v0.12 handles unified diff output from standard `git diff`.
 * Binary files come back with zero additions/deletions — we surface them
 * with `lines_changed: 0` and skip their bytes in the prompt.
 *
 * Never throws: a try/catch around the third-party call returns an empty
 * result on parse failure so the caller can still attempt the LLM call
 * with the raw text as a fallback.
 */
export interface DiffFileSummary {
    path: string;
    role: 'added' | 'modified' | 'deleted' | 'renamed';
    lines_changed: number;
    /** True when the path looks like a test/spec file. Used to compute
     *  test_coverage_hint without requiring the LLM to infer it. */
    is_test: boolean;
}
export interface ParsedDiff {
    files: DiffFileSummary[];
    total_additions: number;
    total_deletions: number;
}
/**
 * Parse raw unified diff text (typically `git diff` or `git diff --staged`
 * output) into a typed summary.
 *
 * @param diffText  Raw diff string. May be empty — returns empty result.
 * @returns         Structured summary; never throws.
 */
export declare function parseDiffText(diffText: string): ParsedDiff;
/**
 * Derive `test_coverage_hint` from a parsed diff without running the LLM.
 * Result fed into the output schema so the model can confirm or correct it.
 */
export declare function deriveTestCoverageHint(parsed: ParsedDiff): 'tests_added' | 'tests_modified' | 'no_test_change' | 'unclear';
/**
 * Format a ParsedDiff as a compact prompt section the LLM can read quickly.
 * Placed before the raw diff in the user message so the model has a
 * structured index before scanning the raw hunks.
 */
export declare function formatParsedDiffForPrompt(parsed: ParsedDiff): string;
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