phase15: update CLAUDE.md with Phase 15 enhancements from AGENTS.md

- Add JIT Self-Host Quickstart section for Phase 15
- Include important flags reference (plugins, parsers, debugging)
- Add Codex async workflow documentation for parallel tasks
- Update test execution with Phase 15 smoke tests
- Improve build time notes (JIT vs LLVM)
- Align with current Phase 15 progress and tooling

🎉 Bootstrap (c0→c1→c1') test confirmed working\!

Co-Authored-By: Claude <noreply@anthropic.com>

docs/development/roadmap/phases/phase-15/ROADMAP.md

@@ -10,21 +10,25 @@ This roadmap is a living checklist to advance Phase 15 with small, safe boxes. U
 - [x] Docs path unify (phase-15 under roadmap tree)
 - [x] Direct bridge (design + skeleton; feature-gated)
 - [x] AOT P2 stubs (CraneliftAotBox/LinkerBox) + RUN smoke wiring
+- [x] JIT‑only baseline stabilized (core smokes green; plugins optional)
+- [x] Roundtrip (Case A/B) aligned; Case A re‑enabled via parser pipe
+- [x] using/namespace (gated) + nyash.link minimal resolver
+- [x] NyModules + ny_plugins regression suite (Windows path normalization/namespace derivation)
+- [x] Standard Ny scripts scaffolds added (string/array/map P0) + examples + jit_smoke
 
 ## Next (small boxes)
 
-1) Ny config loader (Ny-only)
-   - FileBox + TOMLBox to read `nyash.toml` → Map (env/tasks/plugins/box_types)
-   - Deliver as `apps/std/ny-config.nyash` with simple API: `read_root()`, `load_toml()`, `get_env()/get_tasks()`
-2) Ny script plugins enumeration
-   - Add `[ny_plugins]` to `nyash.toml` for pure Nyash plugins
-   - Runner opt-in hook: `NYASH_LOAD_NY_PLUGINS=1`/`--load-ny-plugins` to include/register in order
-3) Direct bridge (v0) rollout
-   - `--parser ny`/`NYASH_USE_NY_PARSER=1` routes to in-proc bridge (subset: return/int/+ - * /, parens)
-   - Keep JSON as debug dump (`NYASH_DUMP_JSON_IR=1`)
-   - Expand smokes + parity checks with rust path
-4) AOT P2 (stub→first run)
-   - Emit `.obj/.o` → link → run; measure time/size; log instructions
+1) Standard Ny std impl (P0→実体化)
+   - Implement P0 methods for string/array/map in Nyash (keep NyRT primitives minimal)
+   - Enable via `nyash.toml` `[ny_plugins]` (opt‑in); extend `tools/jit_smoke.sh`
+2) Ny compiler MVP (Ny→MIR on JIT path)
+   - Ny tokenizer + recursive‑descent parser (current subset) in Ny; drive existing MIR builder
+   - Flag path: `NYASH_USE_NY_COMPILER=1` to switch rust→ny compiler; rust parser as fallback
+   - Add apps/selfhost-compiler/ and minimal smokes
+3) Bootstrap loop (c0→c1→c1’)
+   - Use existing trace/hash harness to compare parity; add optional CI gate
+4) Plugins CI split (継続)
+   - Core always‑on (JIT, plugins disabled); Plugins as optional job (strict off by default)
 
 ## Later (incremental)
 
@@ -33,6 +37,9 @@ This roadmap is a living checklist to advance Phase 15 with small, safe boxes. U
 - 12.7 sugars normalized patterns in bridge (?. / ?? / range)
 - E2E CI-lite matrix (no LLVM) for v0/v1/bridge roundtrip
 - Ny script plugin examples under `apps/plugins-scripts/`
+- Expand std Ny impl (String P1: trim/split/startsWith/endsWith; Array P1: map/each/filter; Map P1: values/entries/forEach)
+- using/nyash.link E2E samples under `apps/` (small project template)
+- Tighten Plugins job: migrate samples to Core‑13; re‑enable strict diagnostics
 
 ## Operational switches
 
@@ -48,7 +55,7 @@ This roadmap is a living checklist to advance Phase 15 with small, safe boxes. U
 
 ## Stop criteria (Phase 15)
 
-- v0 E2E green (parser pipe + direct bridge)
+- v0 E2E green (parser pipe + direct bridge) including Ny compiler MVP switch
 - v1 minimal samples pass via JSON bridge
 - AOT P2: emit→link→run stable for constant/arith
 - Docs/recipes usable on Windows/Unix