phase: 20.49 COMPLETE; 20.50 Flow+String minimal reps; 20.51 selfhost v0/v1 minimal (Option A/B); hv1-inline binop/unop/copy; docs + run_all + CURRENT_TASK -> 21.0

docs/development/roadmap/phases/phase-12.7/ancp-specs/chatgpt5-sugar-syntax-spec.md

@@ -251,9 +251,9 @@ r=d\:_.isValid()/:_|>n|>t
 ### 可逆変換の保証
 ```bash
 # どの形式からでも相互変換可能
-nyash format --from=explicit --to=sugar code.nyash
-nyash format --from=sugar --to=ancp code.nyash
-nyash format --from=ancp --to=explicit code.nyash
+nyash format --from=explicit --to=sugar code.hako
+nyash format --from=sugar --to=ancp code.hako
+nyash format --from=ancp --to=explicit code.hako
 ```
 
 ## 🚀 Phase 15との相乗効果