The real jcalixte/notes clone (570 MB pack, 1179 files) proved both index
strategies are O(N_tree) and unshippable: index.write re-hashes the tree
(611 s), and the index-free read_tree is 77 s cold and OOMs the mmap cache
(zlib crash). Record the run in the tradeoff curve, revise the verdict to an
O(depth) TreeBuilder walk, and add a handoff note with the design, firmware
call sites, and bench steps for the next session.
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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