key/val/select-keys/zipmap/merge/merge-with/get-in/memoize/partial/
trampoline/some?/true?/false?/max/min/reverse move to 20-coll.clj as the
canonical Clojure definitions, plus find — which was previously missing from
jolt entirely (select-keys/merge-with/memoize build on it). Two behavior
fixes ride along: memoize now caches nil results (the kernel fn re-computed
them — canonical find-based impl), and conj of nil onto a map is a no-op as
in Clojure (it errored; the canonical merge relies on it). max/min keep the
JVM NaN behavior by construction (pairwise >/<). not= stays: the kernel tier
(subvec) uses it.
One new tier-ordering rule, learned the hard way: a tier may only use macros
from tiers that load BEFORE it — memoize's if-let (30-macros) broke compiled
init while interpret mode passed, because compile expands macros at tier
load and the interpreter expands lazily. Now documented in the migration
workflow note.
MIGRATION.md is gone — task tracking lives in beads (jolt-ded; the per-batch
workflow, tier-order rules, perf wall, and remaining candidates are in bd
memory core-migration-workflow). The doc's candidate lists had gone stale
against the actual seed anyway.
43 new spec rows. Gate green: conformance 326x3, suite >= baseline, full
jpm test, bench at parity with main back-to-back (4851 vs 4831 TOTAL).
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