giles
1dd4c87d64
Step 5: CEK IO suspension + R7RS modules (define-library/import)
Third CEK phase "io-suspended": perform suspends evaluation, host
resolves IO, cek-resume feeds result back. VM OP_PERFORM (opcode 112)
enables JIT-compiled functions to suspend. VM→CEK→suspend chain
propagates suspension across the JIT/CEK boundary via pending_cek.
R7RS define-library creates isolated environments with export control.
import checks the library registry and suspends for unknown libraries,
enabling lazy on-demand loading. Import qualifiers: only, prefix.
Server-side cek_run_with_io handles suspension by dispatching IO
requests to the Python bridge and resuming. guard composes cleanly
with perform for structured error recovery across IO boundaries.
2598/2598 tests (30 new: 15 core suspension, 3 JIT, 1 cross-boundary,
9 modules, 2 error handling). Zero regressions.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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