- Exclude the 10 core-js 3.0 modules with no counterpart in the
@babel/polyfill set every released bundled.js shipped (concat/splice
species fixes, Array#flat, Object.fromEntries, the __defineGetter__
family, NodeList#forEach): 156.1 -> 153.2 kB (49.3 -> 48.4 kB gzip).
babel rejects unknown exclude names, so a core-js rename fails the build.
- terser `passes: 5`, where output stops shrinking: es5.js 7.52 -> 7.49 kB
gzip.
- New test: bundled.js must not install polyfills no release ever shipped
(fails on the previous master build, passes on 2.14.1 and this one).
- README no longer claims named imports shrink the bundle; AGENTS.md
describes the tsdown build and four-artifact acceptance tests;
CONTRIBUTING points at the existing lint:check script.
