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PLAN-COMPILER-VM: record non-negotiable end state — ONE evaluator, legacy deleted

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Dual-path + emit-time legacy fallback are transitional scaffolding only; the VM
must reach parity at BOTH comptime sites (emit time AND lowering time), after
which the -Dcomptime-flat flag, the fallback, and interp.zig are all removed.
We do not ship both evaluators permanently.
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2026-06-18 11:35:59 +03:00
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@@ -41,6 +41,14 @@ fast.
field-by-field marshaling — gone. field-by-field marshaling — gone.
- `declare`/`define`/`type_info` and `#compiler`/`BuildOptions` ride this one - `declare`/`define`/`type_info` and `#compiler`/`BuildOptions` ride this one
mechanism; the bespoke interp arms are deleted. mechanism; the bespoke interp arms are deleted.
- **ONE evaluator at the end — non-negotiable.** The legacy tagged-`Value` interpreter
(`interp.zig`) is **DELETED**. We do NOT ship both permanently. "Dual-path"
(a compiler-API fn with both a legacy `compiler_lib` handler AND a VM-native impl) and
the emit-time legacy fallback are **transitional only** — scaffolding while the VM
reaches parity at BOTH comptime sites (emit time AND lowering time). The flag
`-Dcomptime-flat` is the swap mechanism; once the VM runs everywhere with parity, the
flag, the fallback, and `interp.zig` all go. Any "VM-only at emit, legacy at lowering"
split is a waypoint, never the destination.
## Principles (hold at every step) ## Principles (hold at every step)