/**
 * Combine a generated lean spec.md body and a generated lean technical.md body
 * into a single unified spec.md content. The technical body's YAML frontmatter
 * is stripped (the spec.md frontmatter already carries the spec id and metadata)
 * and its remaining content is appended as a `## Technical` section.
 *
 * SPEC-1010 Bug C — section preservation:
 * If the user's description already contains a `## Technical` and/or `## Files`
 * heading, we do NOT inject a duplicate. The user's content wins. We only
 * inject sections the user did not author themselves.
 */
export declare function buildUnifiedSpecContent(leanSpecBody: string, leanTechnicalBody: string): string;
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