- Replace SDK semantic objects with native type, symbol, and signature registries.
- Route production checker queries through the owned client while preserving identity and snapshot lifetimes.
- Support scalar BigInt conversion and class union checks needed by native semantic decoding.
- Replace SDK AST materialization with checked native node, list, and text decoding.
- Preserve checker handle identity and snapshot reuse across the frontend.
- Compile generic visitors and guarded node-list iteration without dynamic execution.
- Move frontend message framing and filesystem callbacks into native-capable TypeScript
- Route production requests through the owned client while preserving AST and checker identity
- Preserve synchronous error recovery and cross-platform process cleanup