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Colby McHenry
fca7d87047
Found reviewing the CG-21 fix rather than by a failing test, and it is the same defect inverted. A whole render that overruns `renderCeiling` is skipped ENTIRELY (the branch refuses to slice a file mid-method), so a buy that is approved by the funding pool but refused by the ceiling trades a clustered section for NO section. Only reachable on the 24K tiers. The funding line is `reservedTotal + 0.15 * envelope` — ~27.2K when a medium repo saturates — while `renderCeiling` is `min(1.5 * envelope, 25000) - 600` = 24.4K, so funding can approve ~2.8K the ceiling then refuses. At 13K the line is ~14.4K against an 18.9K ceiling and the two cannot cross, which is why the small-tier fixtures cannot see it. Failing the test in `buysWhole` drops through to the cluster path, which is bounded by `headroom` and always renders something. The GRACE arm is left alone deliberately: a file within a sliver of its reservation that still does not fit is genuinely at the end of a full response, and that predates this epic. Verified inert on the three A/B repos, so the agent A/B measured the same behaviour: excalidraw byte-identical on 3 queries, client-go byte-identical on 3 queries, express reproducer unchanged at 15,984. Full suite green (2,867 passed; one unrelated fs.watch timing flake that passes 30/30 in isolation).