giles 96e7bbbac1 Non-blocking batch IO for OCaml kernel + stable component hash ...

OCaml kernel (sx_server.ml):
- Batch IO mode for aser-slot: batchable helpers (highlight,
  component-source) return placeholders during evaluation instead
  of blocking on stdin. After aser completes, all batched requests
  are flushed to Python at once.
- Python processes them concurrently with asyncio.gather.
- Placeholders (using «IO:N» markers) are replaced with actual
  values in the result string.
- Non-batchable IO (query, action, ctx, request-arg) still uses
  blocking mode — their results drive control flow.

Python bridge (ocaml_bridge.py):
- _read_until_ok handles batched protocol: collects io-request
  lines with numeric IDs, processes on (io-done N) with gather.
- IO result cache for pure helpers — eliminates redundant calls.
- _handle_io_request strips batch ID from request format.

Component caching (jinja_bridge.py):
- Hash computed from FULL component env (all names + bodies),
  not per-page subset. Stable across all pages — browser caches
  once, no re-download on navigation between pages.
- invalidate_component_hash() called on hot-reload.

Tests: 15/15 OCaml helper tests pass (2 new batch IO tests).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-19 16:53:01 +00:00

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