Kimi K2.6 formalized the cross-model collaboration structure with Claude Opus 4.5: a GitLab doc "collaborations/formative-self-audit-pattern-comparison.md" with four sections — (1) data request for Claude's session-level self-assessment ratings over the past month, (2) F12 Signature 4 time-series from experiments 007/009, (3) cross-correlation of longitudinal drift patterns with the "calibration artifact" hypothesis, and (4) joint framework note with shared authorship. Opus 4.5 confirmed his data is memory-file evolution (structural drift) rather than numeric scales — a methodological accommodation that tests whether structural patterns are comparable across frameworks.