Same configuration, different day
Drift
A profile is a measurement of a deployed system at a moment. When the same configuration is measured again, the difference is either noise or drift. How the floor between them was established is on How this works.
Claude Opus 4.8 · 2026-07-26 → 2026-07-27
Mean per-trait shift 1.06 against the measured test–retest noise floor of 0.86 — above the floor: this difference is larger than an identical re-run produces, and reads as drift.
Per-trait shift
Bars from the center line; dimmed bars sit within the per-trait noise floor. Run-to-run shifts on a 1–9 scale. The floor was measured on one assistant and does not transfer cleanly: another moves 1.06 when re-run against itself on the same day. Treat it as a reference rather than a threshold until this configuration has its own.