> ## Documentation Index
> Fetch the complete documentation index at: https://docs.waterfall.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Prospector title filter

> How to build boolean expressions for `title_filter`.

Use `title_filter` to target specific personas with boolean logic.

## Rules

* Operators must be uppercase: `AND`, `OR`, `NOT`.
* Use spaces around operators.
* Use parentheses for clarity and precedence.
* If `title_filter` is missing, API can use `title_filters`.

## Valid examples

* `manager`
* `manager AND NOT project manager`
* `(accountant OR accounting) AND NOT intern`

## Invalid examples

* `managerANDdirector` (missing spaces around operator)
* `manager NOT (project manager)` (invalid expression form)