Night Market Model and Harness Updates

When Anthropic ships a model or Claude Code ships a version, the pins scattered through this repo rot silently. This skill runs the sweep that finds the rot, researches what actually changed, applies the updates, and records where upstream stood so the next run reports only the new delta.

The watermark is the point. Without it every audit restarts from zero and re-derives the same answer by hand. .claude/upstream-baseline.json holds the last recorded upstream state, and each run diffs against it.

When to run