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>
giles
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