feat(phase12.7): 糖衣構文Phase 12.7-B完了 + 自律型AI開発システム制御機能

🚀 Phase 12.7-B: ChatGPT5糖衣構文（基本実装完了）
- パイプライン演算子（|>）実装
- セーフアクセス（?.）とデフォルト値（??）実装
- sugar gateによる段階的有効化機能
- 糖衣構文テストスイート追加

🤖 自律型AI開発システム改善
- codex-async-notify.sh: タスク制御指示追加
  - "下の箱を積み過ぎないように先に進んでください"
  - "フェーズが終わったと判断したら止まってください"
- プロセス数表示機能の改善（count_running_codex_display）
- 自動停止機能が正常動作（Phase 12.7-C前で停止確認）

📚 ドキュメント更新
- Paper 13: 自律型AI協調開発システムの革新性を文書化
- ANCP可逆マッピング仕様追加
- nyfmt PoC（フォーマッター）計画追加

🧱 箱理論の体現
- 74k行のコードベース（Phase 15で20k行を目指す）
- ANCP適用で最終的に6k行相当を狙う
- 世界最小の実用コンパイラへの道

🤖 Generated with [Claude Code](https://claude.ai/code)

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

apps/nyfmt-poc/README.md

@@ -0,0 +1,16 @@
+# nyfmt PoC Examples (Documentation Only)
+
+This directory hosts small snippets demonstrating reversible formatting goals. No runtime behavior changes or formatter are included in‑tree yet.
+
+Examples to explore:
+- pipeline-compact.nyash: pipeline style vs canonical call nesting
+- safe-access-default.nyash: `?.` and `??` sugar vs explicit conditionals
+ - coalesce-range-roundtrip.nyash: `??` and `a..b` triad (Before/Canonical/Round‑Trip)
+ - compound-assign-roundtrip.nyash: `+=` triad (Before/Canonical/Round‑Trip)
+
+Enable PoC smoke hints:
+```bash
+NYFMT_POC=1 ./tools/nyfmt_smoke.sh
+```
+
+Notes: The real formatter prototype lives out of tree during early PoC. This folder documents intent and testable round‑trip expectations.

apps/nyfmt-poc/coalesce-range-roundtrip.nyash

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+# Round-trip triad: Default (??) + Range (a..b)
+
+# Before (sugar)
+user_name = user?.profile?.name ?? "guest"
+nums = 1 .. 5
+
+# Canonical
+# user_name = peek user { null => null, else => peek user.profile { null => null, else => user.profile.name } }
+# nums = Range(1, 5)
+
+# Round-Trip (expected)
+# user_name = user?.profile?.name ?? "guest"
+# nums = 1 .. 5
+

apps/nyfmt-poc/compound-assign-roundtrip.nyash

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+# Round-trip triad: Compound Assign
+
+# Before (sugar)
+i += 1
+
+# Canonical
+# i = i + 1
+
+# Round-Trip (expected)
+# i += 1
+

apps/nyfmt-poc/pipeline-compact.nyash

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+# PoC example: pipeline style vs canonical nesting
+
+# Target sugar (not yet parsed by runtime):
+# result = data |> normalize |> transform |> process
+
+# Canonical form (current Nyash):
+local result = process(transform(normalize(data)))
+

apps/nyfmt-poc/safe-access-default.nyash

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+# PoC example: safe access and default value
+
+# Target sugar (not yet parsed by runtime):
+# name = user?.profile?.name ?? "guest"
+
+# Canonical form (current Nyash):
+local name
+if user != null and user.profile != null {
+    name = user.profile.name
+} else {
+    name = "guest"
+}
+