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Task-by-task TDD plan implementing the approved sub-project-2 spec: tools/ scaffolding, the additive hef.catalog change (validate_catalog/index_by_id), ffprobe/ffmpeg mechanical tagging with cover-art guard, per-archive license normalization, heuristic coordinate drafting, the ingest pipeline + first-ship fetchers (LibriVox/NASA/Internet Archive, others deferred stubs), the review transition core + interactive CLI, and hermetic + opt-in integration tests. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>