Package-level cache for the parsed KST 13ed JSON files

v0.9.65 (Copilot review #5): kst13_criteria() previously parsed the full ~3.1 MB criteria JSON on every call. Looping over a few hundred codes was crippling. This cache loads each JSON once per session.

Usage

.KST13_CACHE

Format

An object of class environment of length 0.

Details

Kept in a private environment so package-internal code can reach the cached objects via .KST13_CACHE$<filename> but external callers must go through kst13_codes / kst13_criteria.