Remark. A harness comparison needs a declared configuration axis [ftip-00CF]
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    Section 2.6 of [karten2026prime] binds task and tool interfaces to model settings. Its evaluation configuration also records compaction, refinement, retry, completion, and resource policies. The record in Definition [ftip-00CE] is a proposed representation of those configuration choices.

    To attribute a score difference to a harness coordinate, the comparison must hold the other coordinates fixed or model their changes explicitly. Two scores under different records \(\mathfrak e\) and \(\mathfrak e'\) can still be descriptively useful, but their difference does not isolate a causal harness effect.