# Example 33: Wiring Diagram Execution - Failures

```mermaid
flowchart LR
  user[user] -->|text (U)| validator[validator]
  validator -->|text (V)| planner[planner]
  planner -->|plan (V)| tool_builder[tool_builder]
  planner -->|plan (V)| policy[policy]
  tool_builder -->|toolcall (V)| sink[sink]
  policy -->|approval (T)| sink
```
