Phase v7-4: Policy Box 導入 (L3 層の明確化とフロント芯の作り直し)
- SmallPolicyV7 Box: L3 Policy layer に配置、route 決定を一元化 - Route kind enum: SMALL_ROUTE_ULTRA / V7 / MID_V3 / LEGACY - ENV priority (fixed): ULTRA > v7 > MID_v3 > LEGACY - Frontend integration: v7 routing を Policy Box 経由に変更 (段階移行) - Legacy compatibility: 既存の tiny_route_env_box.h は併用維持 Box Theory layer structure: - L0: ULTRA (C4-C7, FROZEN) - L1: SmallObject v7 (research box) - L1': MID_v3 / LEGACY (fallback) - L2: Segment / RegionId - L3: Policy / Stats / Learner ← Policy Box added here Frontend now follows clean "size→class→route_kind→switch" pattern. ENV variables read once at Policy init, not scattered across frontend. Future: ULTRA/MID_v3/LEGACY consolidation, Learner integration, flexible priority. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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@ -340,3 +340,51 @@ RegionIdBox / SegmentBox_v7 / PageStatsBox
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## 7. Phase v7-4: Policy Box (L3 層の明確化)
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### Policy Box の役割
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SmallPolicyV7 Box を L3 に配置し、「どのクラスをどの層に送るか」を一元管理:
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```c
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typedef struct SmallPolicyV7 {
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SmallRouteKind route_kind[8]; // C0-C7
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} SmallPolicyV7;
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const SmallPolicyV7* small_policy_v7_snapshot(void);
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```
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### フロントの責務
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フロントは Policy Snapshot を読んで route を選ぶだけ:
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```c
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const SmallPolicyV7* policy = small_policy_v7_snapshot();
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SmallRouteKind route = policy->route_kind[class_idx];
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switch (route) {
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case SMALL_ROUTE_ULTRA: // L0
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case SMALL_ROUTE_V7: // L1
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case SMALL_ROUTE_MID_V3: // L1'
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case SMALL_ROUTE_LEGACY: // L1'
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}
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```
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### ENV の一元化
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ENV 変数は Policy init で一度だけ読む:
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- `HAKMEM_TINY_C7_ULTRA_ENABLED`
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- `HAKMEM_SMALL_HEAP_V7_ENABLED` + `HAKMEM_SMALL_HEAP_V7_CLASSES`
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- `HAKMEM_MID_V3_ENABLED` + `HAKMEM_MID_V3_CLASSES`
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優先順位: ULTRA > v7 > MID_v3 > LEGACY (固定)
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将来的にはクラスごとの柔軟な優先順位設定や、Learner 連携による動的ルート選択も可能。
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### 段階移行
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Phase v7-4 では v7 関連のみ Policy box 経由に変更。
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ULTRA/MID_v3/LEGACY は既存の `tiny_route_env_box.h` を併用(後で統合予定)。
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