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MAST-U feedback label collection passes local artifact checks

measured
hardened
Published

October 11, 2026

measurement enforced rule Entry 44 · milestone M4

We completed the owner-approved feedback label collection for MAST-U remediation. The collection uses training equilibria and excludes both test equilibria. The surrogate, guard and closed-loop acceptance limit remain unchanged.

We reviewed the finished local artifacts before considering training. The review checks the allocation against the approved resource and time limits, verifies checksums and provenance, and compares every label input row with its selected case and source trajectory. It also checks the case budget, unique coordinates, training-only equilibrium selection, source-model identity and finite successful labels: eight local checks pass for approved allocation/time, hashes and lineage, full-input alignment, case budget, unique coordinates, training-only equilibria, source model and finite successful labelsC-183.

stage result
completed collection eight local checks pass for approved allocation/time, hashes and lineage, full-input alignment, case budget, unique coordinates, training-only equilibria, source model and finite successful labelsC-183
artifact synchronization awaiting explicit approval
training and coupled revalidation pending

The new evidence establishes that the collected labels retain their full solver inputs and their source lineage. It does not establish held-out model accuracy or an improved temperature trajectory. The existing failed MAST-U acceptance result remains open (K-030).

What’s next. Synchronize the reviewed artifacts after approval, then prepare training and validation while preserving the test split and the owner-required monotonicity constraint. Another coupled comparison must assess the unchanged closed-loop limit before any claim of successful remediation.

Technical details → Verification › mastu remediation
Decisions → OQ-27

© Copyright 2026 Vignesh Gopakumar

 
 
Code and first draft by Claude (Anthropic) and Codex, working to a brief by Vignesh Gopakumar, who reviewed and approved this page. How this is built · Tokamak Toolkit home