X_SIDE_EFFECTS_UNANCHORED

a module on SIDE_EFFECTS_ANCHORS that no entry imports for effect

the module registers something on behalf of a module that never imports it, so nothing puts it in the graph when none of its own bindings is used. The sideEffects array alone is not the enforcement: Bun before 1.4.1 read any array as false and shook the named module out (oven-sh/bun#40650) — measured then, @ultimat3/core's schema-error-codes.ts flapped 12 builds in 60 on Bun 1.4.0 and 28 in 60 on 1.3.14 in examples/dummy's feed island, and every X_VALIDATION_FAILED rendered untitled in the browser. Fixed upstream in 1.4.1; the bare import is what holds on every bundler

add import './<module>'; to that package's src/index.ts and keep the module in the package's "sideEffects" array — a bare import is a statement rather than a binding, and a bundler that honours the array keeps a bare-imported module only if the array lists it