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hakorune/docs/development/strategies/de-rust-roadmap.md
nyash-codex 981ddd890c Phase 22.1 WIP: SSOT resolver + TLV infrastructure + Hako MIR builder setup 
Setup infrastructure for Phase 22.1 (TLV C shim & Resolver SSOT):

Core changes:
- Add nyash_tlv, nyash_c_core, nyash_kernel_min_c crates (opt-in)
- Implement SSOT resolver bridge (src/using/ssot_bridge.rs)
- Add HAKO_USING_SSOT=1 / HAKO_USING_SSOT_HAKO=1 env support
- Add HAKO_TLV_SHIM=1 infrastructure (requires --features tlv-shim)

MIR builder improvements:
- Fix using/alias consistency in Hako MIR builder
- Add hako.mir.builder.internal.{prog_scan,pattern_util} to nyash.toml
- Normalize LLVM extern calls: nyash.console.* → nyash_console_*

Smoke tests:
- Add phase2211 tests (using_ssot_hako_parity_canary_vm.sh)
- Add phase2220, phase2230, phase2231 test structure
- Add phase2100 S3 backend selector tests
- Improve test_runner.sh with quiet/timeout controls

Documentation:
- Add docs/ENV_VARS.md (Phase 22.1 env vars reference)
- Add docs/development/runtime/C_CORE_ABI.md
- Update de-rust-roadmap.md with Phase 22.x details

Tools:
- Add tools/hakorune_emit_mir.sh (Hako-first MIR emission wrapper)
- Add tools/tlv_roundtrip_smoke.sh placeholder
- Improve ny_mir_builder.sh with better backend selection

Known issues (to be fixed):
- Parser infinite loop in static method parameter parsing
- Stage-B output contamination with "RC: 0" (needs NYASH_JSON_ONLY=1)
- phase2211/using_ssot_hako_parity_canary_vm.sh fork bomb (needs recursion guard)

Next steps: Fix parser infinite loop + Stage-B quiet mode for green tests
2025-11-09 15:11:18 +09:00

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De‑Rust Roadmap (Phase 21.9+)

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.

Phases

Phase 0 — Archive (low risk)

  • Target: Rust LLVM backend (src/backend/llvm) — deprecated in favor of Python llvmlite.
  • Action: move to archive/rust-llvm-backend/ with a clear RESTORE.md.
  • Acceptance: cargo build --release (default features) remains green; quick smokes green.
  • Revert: git mv archive/rust-llvm-backend/llvm src/backend/.

Phase 1 — Parser/MIR Hako‑first（22.0）

  • Make Hako the primary for Parser/MIR; Rust builder becomes fallback.
  • Verify quick canaries green under registry; keep hv1 inline parity.

Phase 2 — TLV C shim & Resolver SSOT（22.1）

  • TLV codec to C shim (+ Rust FFI); Resolver/Using SSOT in Hako shared by runner/analyzer.

Deliverables & Tests

  • 22.0: registry builder default ON; hv1直列 green; Core/Interpreter is diagnostic.
  • 22.1: TLV round‑trip smokes; Using SSOT parity between runner/analyzer.

Phase 3 — Core Thinning I（22.2, 2–4 months）

  • Plugin loader thin C wrapper (dlopen/dlsym) and basic boxes C core; Rust shim remains.

SSOT for Using/Resolver (summary)

  • Resolution order: modules (nyash.toml) → relative path inference → not found (warn) with verbose details.
  • Analyzer/HakoCheck follows the same order; runner shares policy helpers. No path‑literal using in strict profiles.

Phase 4 — Long‑haul（22.3, 3–6 months）

  • Python llvmlite → Hako IR builder + C ABI.
  • Parser/MIR builder fully Hako‑first; Rust becomes fallback.
  • NyKernel minimal C runtime (BoxCall dispatcher + collections + file).

Phase 21.10 — LLVM Line Unification (SSOT + crate probe)

  • SSOT builder (tools/ny_mir_builder.sh) selects backend by env; crate path opt‑in.
  • Add crate S3 canaries (ternary/map/print); defaults unchanged.

Phase 21.11 — Flip default to crate (ny-llvmc)

  • Make crate default when available; llvmlite becomes opt‑in.
  • S3 reps run via crate in quick; legacy remains available.

Phase 21.12 — Hako Native LLVM Builder (bootstrap)

  • Experimental native (Hako→LLVM C API) path for minimal EXE.
  • Behind NYASH_LLVM_BACKEND=native toggle; no default impact.

Phase 21.13 — llvmlite deprecation (default off)

  • Remove llvmlite from auto paths; keep explicit toggle + optional CI job.

Phase 21.14 — Optimization & Perf Harness

  • Perf harness + PHI invariants; optimize hot paths; publish numbers.

Principles

  • Guard everything by env/features; defaults unchanged.
  • Keep changes reversible (small diffs, RESTORE docs, fallbacks).
  • Test gates: quick smokes + representative hv1/hakovm parity.

Today (suggested)

  1. Lock 22.0 (Parser/MIR Hako‑first) — builder registryを既定ON、quickが緑。
  2. Prepare 22.1 (TLV C shim & Resolver SSOT) — I/F草案と最小スモーク。
  3. LLVM統一（21.10–21.14）は並行で準備、切替は22.x完了後に本格実施。

Test Strategy (gates)

  • Quick: tools/smokes/v2/profiles/quick/core/* (phase2037 flow, phase2170 state) — green.
  • Verify routing: HAKO_VERIFY_PRIMARY=hakovm (default); hv1_inline perf path parity (env toggles only).
  • Build: cargo build --release (default features); LLVM paths are opt‑in.
  • Docs: keep RESTORE steps for any archived parts; small diffs, easy rollback.