39 lines
1.8 KiB
Markdown
39 lines
1.8 KiB
Markdown
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# De‑Rust Roadmap (Phase 21.9+)
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Purpose: reduce Rust surface (non‑plugin) while keeping correctness and reversibility. Make Hakorune (Hako) the primary host for parsing/building/executing; keep Rust for kernel/ABI/thin wrappers.
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## Phases
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### Phase 0 — Archive (low risk)
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- Target: Rust LLVM backend (src/backend/llvm) — deprecated in favor of Python llvmlite.
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- Action: move to `archive/rust-llvm-backend/` with a clear RESTORE.md.
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- Acceptance: `cargo build --release` (default features) remains green; quick smokes green.
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- Revert: `git mv archive/rust-llvm-backend/llvm src/backend/`.
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### Phase 1 — Quick Wins (1–2 months)
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- hv1_inline → Hako parity (already functionally covered; keep as perf path).
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- MIR interpreter parity check; route Primary to Hako VM.
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- TLV codec → C shim (FFI) with thin Rust wrapper.
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- LLVM wrapper → Hako/C harness (Python stays primary until Hako IR is ready).
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### Phase 2 — Core Thinning (2–4 months)
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- Plugin loader thin C wrapper (dlopen/dlsym), unify host ABI.
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- Basic boxes (Array/Map/File) small C core (handle‑based), keep Rust shim.
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- Resolver/Using: SSOT in Hako; runner uses shared policy.
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### Phase 3 — Long‑haul (3–6 months)
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- Python llvmlite → Hako IR builder + C ABI.
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- Parser/MIR builder fully Hako‑first; Rust becomes fallback.
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- NyKernel minimal C runtime (BoxCall dispatcher + collections + file).
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## Principles
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- Guard everything by env/features; defaults unchanged.
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- Keep changes reversible (small diffs, RESTORE docs, fallbacks).
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- Test gates: quick smokes + representative hv1/hakovm parity.
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## Today (suggested)
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1) Stage Phase‑0 move as a script (not auto‑run) + RESTORE.md.
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2) Add phase docs (docs/private/roadmap/phases/phase-21.9/PLAN.md).
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3) Keep CI/dev instructions intact (no build break when features=none).
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