Story 19.3 - Provide a typed plugin API for Python services

[acbart]

As an engineer, I want a stable bridge between Python and the React app so that console, files, feedback, and graphics can evolve safely.

Acceptance criteria:

• The Python bridge exposes typed APIs for:

  • stdout/stderr
  • input
  • virtual file reads/writes
  • feedback submission
  • trace events
  • graphics output
  • image output
  • dataset access

• APIs are documented with TypeScript interfaces.

• Invalid bridge calls return structured errors.

• The bridge prevents learner code from accessing instructor-only resources.