Web Visual Regression

Accept exactly regress; refuse absent, unknown, mixed, legacy harness or freeze, and all baseline/update requests. This owner compares; it never mutates project source, configuration, baseline PNGs, or BASELINES.md.

Read runtime-trust.md, harness-contract.md, screenshot-baselines.md, and regression-policy.md. Resolve every relative link in this file against the directory containing this SKILL.md, never the plugin skills root.

Bind Git HEAD and source digest; the baseline record's design blessing, environment, matrix, masks, budgets, and excused cells; and the exact requested scope. Refuse a missing/stale record, missing cell, environment mismatch, unexplained skip, or writable baseline path.