(chore) add agentic-sys and roundtrip

rust-agentic-sys.md

@@ -49,13 +49,13 @@ The central structural decision, and the one the previous revision got wrong.
 ```
 ┌──────────────────────────────────────────────────────────┐
 │  DOMAIN  — user-defined, data, versioned, hot-swappable  │
-│  workflow definition · rubrics · verifiers · tools        │
+│  workflow definition · rubrics · verifiers · tools       │
 └──────────────────────────────────────────────────────────┘
                             │ executed / graded by
 ┌──────────────────────────────────────────────────────────┐
-│  KERNEL  — framework-owned, compiled, exhaustively typed  │
-│  attempt lifecycle · event log · intents · branches       │
-│  scheduling · tournament · partitioning · tenancy         │
+│  KERNEL  — framework-owned, compiled, exhaustively typed │
+│  attempt lifecycle · event log · intents · branches      │
+│  scheduling · tournament · partitioning · tenancy        │
 └──────────────────────────────────────────────────────────┘
 ```
 
@@ -1040,10 +1040,10 @@ the model calls, and that trade is now the user's to make explicitly rather than
 one the framework makes for them.
 
 ```
- [ G comparable episodes for one task, one outcome class ]
+    [ G comparable episodes for one task, one outcome class ]
               │
               ▼
-   [ shuffle into brackets ]        ◄── shuffling also cancels position bias
+    [ shuffle into brackets ]        ◄── shuffling also cancels position bias
               │
               ▼
  ┌─────────────────────────────────┐
@@ -1051,10 +1051,10 @@ one the framework makes for them.
  └────────────────┬────────────────┘
                   │
                   ▼
-     [ Bradley-Terry fit over all comparisons ]
+    [ Bradley-Terry fit over all comparisons ]
                   │
                   ▼
-      [ strength per episode + confidence interval ]
+    [ strength per episode + confidence interval ]
 ```
 
 Swiss rather than round-robin: O(G log G) instead of O(G²). Eight episodes is