The one-breath pitch

Key features

• A three-day production run of the original underseal workflow (Codex as lead, DeepSeek workers, August 2026) left OpenAI-side metering worth reading as a design signal — with two caveats: it predates this DSH plugin, and it mixes Codex's own context with underseal's, so no clean per-part attribution exists.
• Contributionregisters eight model-facing tools on ctx.tools.
• The underseal.py bytes match python/underseal.pin.json (SHA-256 130c86e0…)
• E1 — vendored verifier bytes.
• Effective input cost at 0.1× cached reads: ≈ 31.1M tokens (≈ 89% saved)