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real_packet spine residuals: 2 outlined fixed-write template instantiations + 7 compressed_float_internal read calls #78

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@rowan-claude

From the 2026-08-17 C/C++ real-world parity campaign (cairn 7974800c, eras cfixes-air → realworld2-space). Filed so it isn't forgotten; no commitment implied.

From the era realworld2-space objdump: the C++ real_packet spine carries 52 calls vs C's now ~0 on clang. The residual call targets decompose into 2 outlined fixed-write template instantiations plus 7 compressed_float_internal read calls.

The outlining is deliberate (chunky-outlining choice), but with C's spine now call-free on clang it deserves re-examination under the Implementation Law.

Receipts: era CSVs at space:~/rowan-bench-quick/results/ and on schema branches; cairn: rowan-new cairns/7974800c-*.md.

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