| Name | Description |
| AddAsNoAction | Treat expressions with missing actions as explicit No-Action entries. The expression is evaluated and may contribute to proximity or confidence calculations, but will never result in an executable action. |
| IgnoreRule | Ignore expressions with missing actions entirely. The rule is skipped during evaluation and does not contribute to scoring, proximity, or outcomes. |
| FailSession | Fail the evaluation session if any expression is missing an action. This enforces strict validation and prevents execution with incomplete or ambiguous rule definitions. |
| UseLastColumn | Derive the action from the last non-feature column in the data source. This allows legacy or compact schemas where the action column is implied by position rather than name. The derived column is treated as the explicit action for evaluation and execution. |