* fix(compiler): support implicit top-level await modules
- Match Node 24 syntax detection by treating top-level await as an ES module marker.
- Add differential corpus coverage for TypeScript files without explicit imports or exports.
* fix Node ESM classification for top-level await
* fix ESM require diagnostics and classification caching
* fix require binding and package type precedence
* fix: align top-level await module detection with Node
* Restore sandbox test performance
- Re-enable secure native compiler caching for repo-local test artifacts.
- Isolate strict cache coverage while keeping it off the sandbox critical path.
* fix: respect sandbox test runtime limits
* fix(compiler): refine narrowed union payload fields
- Treat pure union discriminant reads as stable within compound guards.
- Cover payload-field range refinement in analysis and library builds.
* fix(compiler): preserve field facts across union discriminants
- Classify Node 24 fetch APIs and options by static, dynamic-only, unsupported, and out-of-scope support.
- Project the inventory into the surface manifest and add runtime drift and conformance checks.
- Fence unprofiled Headers members with actionable SC2020 diagnostics.
- Pin the supported fetch surface to an explicit Node and Undici profile.
- Generate deterministic WebIDL, AbortSignal, and stream differential campaigns.
- Match Node stream pull scheduling while preserving typed source identity.
- Retain every declared path when structurally identical arms share a lowered record field.
- Keep differing-class collisions on SC4009 and cover both outcomes with regressions.
- Track ordinary record and class fields through stable guard expressions.
- Preserve conservative invalidation and add differential regression coverage.
- Track whether subscriptions_export is explicitly declared and reject dangling names at the profile.
- Preserve optional omission semantics and cover both paths with contract regressions.
- Preserve tagged-union shape identity when mapping synthesized payload fields into integer inference.
- Refuse fractional writes on named-union and message payload slots, with regressions for both paths.
- Resolve scalar alias chains to their primitive wire types.
- Keep aliases out of the sidecar type table.
- Cover records, messages, helpers, and integer slots.
Chris Tate