post(blog): THE INVARIANT IS A SENTENCE — Section 13 THE ENVELOPE: the sixth retraction (every covenant pass was a turn that touched nothing; 0 of 424, yield 0 of 142), the envelope's formal methods as seven tests (unit tags, no dollar without a date, homogeneity, monotone in yield, the commit unit with its splitting fixture, the aperture as a permutation of the map, hurdle and room), what the record gives per commit and the floor it cannot give, steering work with a null that is an identity, the job above the commit on a ledger with no closes, the receipt that verifies with no git, six things left with the reader that fills each
This is a live, recomputable drift receipt — the on-chip proof of where this commit's work landed (in its authorized domain, out of it, or unplaced), sealed with a signature anyone can verify. It is the same receipt shipped in the on-commit email, hosted here so the claim is checkable on the open web. The full receipt (attestation, density panel, full commit message) publishes at /commit/9e90ffc8c/ shortly after the commit lands.
This is the proven asset: the drift read was produced by a real on-chip walk on sensor: metal, sealed with an ed25519 signature over the canonical body, and bound to the exact lattice by gridHash. Anyone can recompute it and check the signature — no trust in us required.
These are measurements, not a validated risk score. In a pre-registered predictive test the drift metric did not predict real defects (AUC ≈ 0.50, at chance) and the σ is pinned — so nothing here is a probability of loss and nothing here is a price. It is honest telemetry we publish while the instrument is under calibration.
Δ weighted bleed · Δ-spread max king-move leak · Γ traction slope · 𝒱 reef volatility · Θ efficiency decay (null → pending; no per-commit token meter). Definitions are carried in the signed signal's notes.