Phase 4 of the case-writer pipeline. Write the full teaching note for a Harvard-style MBA teaching case — all 12 mandatory sections (confidential header, summary, learning objectives, key issues, assignment questions, options analysis 5a, discussion questions with model answers, theory connections, teaching plan, board plan, epilogue, methodology disclosure, supplementary reading). Enforces TN tone discipline (banned phrases, no moral verdicts, no asymmetric advocacy) and a length ratio relative to the case body. Use after `case-writer-draft` produces a DRAFTED case.
