/**
 * Minimal unified-diff generator (no external deps).
 *
 * Used by remediation handlers to produce human-readable diffs for the
 * mandatory dry-run display. Intentionally simple: line-level Myers diff
 * with +3 lines of context. Good enough for code file display.
 *
 * @connexum/ai-governance PR-5a
 */
export declare function computeUnifiedDiff(before: string, after: string, filePath: string): string;
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