* Expand static compilation for common Effect 4 patterns
* Run every Effect 4 fixture slice in CI
* Preserve existing corpus behavior across Effect 4 lowering
* Preserve Effect platform callbacks and native stream state
* Record new corpus baselines and retain child stdin refusals
* Retire the obsolete stateful regex diagnostic
* Preserve promise reference count layout for cycle collection
- redeclaring an inherited field WITH an initializer lowers as the [[Define]]-equivalent assignment into the base slot at the subclass's field-init position (builtin Error prefix included — prettier's errors.js `name = "ConfigError"`); bare and type-changing redeclares keep sharpened fences (corpus 2428, diagnostics inheritance re-record)
- object destructuring of CLASS instances desugars to one member read per element, left to right: fields read slots, accessors call getters through the fieldGetExpr dispatch, renames/parameter patterns/defaults included (corpus 2429 — prettier's AstPath { previous, next })
- an object literal missing an 'unknown' field completes with the DOM undefined (the absent-property read's answer), at literal completion and in the record width relation (corpus 2430 — prettier's getFileInfo(file, {}))
- node:module joins the supported builtins prefix-only as an admit-then-fence surface: createRequire keeps a per-member fence that defers to a catchable runtime error in JS sources (diagnostics create-require pins the hint naming the pattern)
Chris Tate