sd_bench dir-entry scaling: stat-miss is ~0.1 ms/entry and the
loose-object composite hits p50 402.9 ms at 256 siblings, reproducing
the field ~360-400 ms/loose-write from primitives. The objects/
fan-out is ~256 dirs, so every path resolution under it pays the scan.
Bounded and accepted; levers (fewer resolutions, pack-not-loose) go to
a future perf pass.
The design record for Typoena — the decisions, specs, and bench write-ups
behind the writing appliance. Start with the ADRs for the
load-bearing choices, or the v0.1 specs for what the
first release actually does.
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