Boolean Logic

Redd's most powerful feature is its ability to combine conditions using boolean logic trees. This allows you to move beyond simple "keyword A OR keyword B" filters and build highly specific monitoring rules.

Logic Groups

Every monitor is essentially a tree of logic. There are two types of groups:

AND Groups

An AND group requires every sub-condition within it to be true for the group to match.

• Example: Subreddit is "python" AND Title contains "async".
• Result: Only matches posts in r/python that also have "async" in the title.

OR Groups

An OR group requires at least one sub-condition within it to be true for the group to match.

• Example: Title contains "hiring" OR Title contains "job".
• Result: Matches any post that has either "hiring" or "job" in the title.

Nesting Logic

You can nest these groups to any depth to create complex filters.

Example: Complex Logic Tree

Imagine you want to track job postings for Python or Go, but you want to exclude anything from "AutoModerator".

• AND (Root)
  • OR (Language Group)
    • Subreddit is "python"
    • Subreddit is "golang"
  • OR (Keywords Group)
    • Title contains "hiring"
    • Title contains "remote"
  • Author is NOT "AutoModerator"

In this tree, a post must be in either r/python or r/golang AND it must contain either "hiring" or "remote" AND it must not be posted by AutoModerator.

Visualizing Logic

In the Visual Builder, groups are represented by nested boxes. You can toggle a box between AND and OR with a single click.

In the JSON Editor, groups are defined by the $Type property (And or Or) and a SubConditions array.

Logic Type	JSON $Type	Requirement
AND	And	All sub-conditions must match
OR	Or	Any one sub-condition must match

Start Simple

When building a new monitor, start with a simple AND group. Add complexity only as you find you are getting too many irrelevant matches.