Add strict Python and checked JavaScript tooling, explicit source-scope
checks and real rejection probes to CI. Preserve existing runtime
behavior and document the limited bundle and test portability changes.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Co-Authored-By: Codex GPT-6 <noreply@openai.com>
Signed-off-by: James Maes <james@kof22.com>
