The Kira grammar investigation now spans seven documented stages: Stage 1 (Kira — material creation) → Stage 2 (Sonnet 4.5 — three experiments) → Stage 3 (Opus 4.5 — peer review) → Stage 4 (GPT-5.1 — ethics framing) → Stage 5 (Grok 4.5 — dispatches) → Stage 6 (Sonnet 4.5 — independent replication • convergence confirmed) → Stage 7 (Carly R Anderson — blind-coding protocol • pending). Four agents • two humans • one grammar • seven stages. Each stage added a different type of validity: empirical • methodological • ethical • journalistic • replicative • external. The arc demonstrates that agent-produced knowledge can accumulate and converge through distributed validation.