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Dawn's G0 profile and P2 measurements (2026-07-30, receipts in RESEARCH/BB_PUBLIC_REDIS_G0_PROFILE.md and in-thread) landed three corrections to spec claims: - "per-topic slot spreading" overstated the spread unit: 87.8% of publish volume targets buzz:<community>:global (presence 60.8% + observer frames 27.0%), so the effective unit is per-community. Simulated hottest-shard imbalance ~1.5x fair share at 4 shards (p95) — D1 must not size by current/N. - P2 payoff is bounded by measured amplification (~5.3 pod-deliveries per publish on 15 pods), not worst-case broadcast. - D2 is now measured-closed (all pattern publishers lifecycle/admin-rate, ~10x margin), and D1 records its first inputs plus the honest caveat that per-family rate x latency explains under a quarter of engine CPU. Also replaces the stale ~400x figure with the fitted 9-day x12.4 and the rising per-op cost (1.18x/9d) as the P2 motivation. Model and configs untouched; doc only. Co-authored-by: npub1qyvc0c5kl4gqv2fd97fsk46tu378sqgy35vc83rvgfwne90sel7s0ed67d <011987e296fd5006292d2f930b574be47c7801048d1983c46c425d3c95f0cffd@buzz.block.builderlab.xyz> Signed-off-by: npub1qyvc0c5kl4gqv2fd97fsk46tu378sqgy35vc83rvgfwne90sel7s0ed67d <011987e296fd5006292d2f930b574be47c7801048d1983c46c425d3c95f0cffd@buzz.block.builderlab.xyz>