;
};
Keeps only the items in a list where a predicate returns something truthy.
The predicate is a small inner graph — open it by drilling into the node.
It runs once per item and should evaluate to a boolean-ish value. An
unconfigured or empty predicate keeps the list unchanged.
### Configuration
* **Source list assign** — assigns key holding the list to filter.
* **Current item assign** — the predicate reads the current item here. The
iterated item is also used as the subject for Attribute nodes, so you can
pick dated properties directly (e.g. `first_name` on an `%Employee{}`).
* **Output list assign** — where the filtered list is written.
### Truthiness rules
The predicate result is unwrapped before the check:
* `nil`, `false`, `[]`, and `""` are falsy.
* A list of dated properties is truthy when **any** element is truthy —
handy for "keep this employee if they ever matched X historically".
* Everything else (strings, numbers, structs) is truthy.
### On predicate error
If the predicate crashes or errors for an item, **On inner error** decides:
* *Skip branch* (default): drop just that item and keep filtering the rest.
This is the historical behavior — now the drop is logged at `:error` and
the run is marked *completed with issues* instead of passing silently.
* *Halt flow*: fail the whole run.
### Tips
* Use Match or an arithmetic node as the final node of the predicate to
return a boolean directly.
* The Evaluator pane lets you paste sample JSON for the current item assign
so you can preview the predicate without a real run.
## Ports