hakorune/docs/private/roadmap/phases/phase-20.17/TASKS.md

Phase 20.17 — Tasks & Checklist

Core tasks（self‑hosting 優先。Optional/Bang のコード実装は 20.18 に延期）

• MIR(JSON v0) schema doc finalized and referenced by smokes
• Gate‑C(Core) exit semantics symmetric (file/pipe) with stable tags
• Front EXE contracts (OK/NOOP/FAIL) finalized; strict unknown keys behavior documented
• Core mir_call: String methods (size/indexOf/lastIndexOf/substring) negative coverage（range）を固定（一部追加予定あり）
• Core mir_call: Map delete/clear（metadata） + negative smokes; len consistency
• Core ModuleFunction: interpreter‑inline（StringHelpers.*）と Core 実装の棲み分け整理
• Optional policy (MVP) は設計メモに留め、実装は 20.18 チケットへ（docs/architecture/optional-semantics.md に計画を残す）

Selfhost pipeline

• Stage 0 → Stage 1: compiler AOT build (smoke)
• Stage 1 → Stage 2: self‑build with artifact parity (hash/canonical)
• Optional: Stage 2 → Stage 3 (time‑boxed confidence)
• Minimal selfhost (emit→parse→execute) quick opt‑in canary PASS（Core直行）
• 子 emit‑only → parent first‑line JSON 捕捉のカナリア追加（curated 昇格）

Builder/VM parity

• Builder covers minimal instruction set required by selfhost subset
• Core VM mir_call supports Array/Map/Extern/Method/ModuleFunction minimal set
• Negative smokes for unsupported callee types with stable tags
• Reader covers unary/params/Constructor/Const nested forms（v0互換）

Docs

• Spec v1 (syntax subset + MIR semantics) published
• ABI(min) and stdlib nucleus documented
• TTL notes for Rust boundary diagnostics; removal plan recorded
• HKI ガイド: gate表 / env.* 警告計画（deprecate→warn→remove）を明記
• Gate‑C(Core) routing doc linked from INDEX (JSON→preflight→Interpreter)
• Exit code rounding note (0–255) in VM README cross‑referenced from testing guide
• Optional/Null Semantics（docs/development/architecture/optional-semantics.md）に従い、language reference に補足
• Gate‑C(Core) routing doc: Helpers/quiet/rc記述を更新
• INDEX から Gate‑C/Core と VM README へ導線追加

Recent progress (Phase 20.16–20.17 bridge)

• Gate‑C(Core) direct route stabilized (file/pipe): quiet numeric output; rc rounded; stable tags
• Core mir_call: Array/Map minimal ops + String(size/indexOf/lastIndexOf/substring)
• to_i64: tests adjusted to stdout+rc(9) when value>255; negatives tagged
• Legacy cleanup: selfhost compiler paths unified to lang/; prelude exclusion pattern fixed

Next actions (P0/P1)

• P0: Gate‑C symmetry smoke (file/pipe × plugins on/off) in one script
• P0: substring negative smokes (start>end, negative/large indices); document behavior
• P1: Map delete/clear minimal implementation (metadata) + len parity tests