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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.113 Home All releases olderv2.1.112 v2.1.114newer
Claude Code v2.1.113

Where Clause Predicate Language

What

A new structured filtering syntax for specifying conditions on event triggers and data queries, supporting a rich set of comparison operators.

Details
  • Operators: is, is_not (single values), one_of, none_of (list values), starts_with, contains, matches
  • Provides clear error messages for malformed predicates:
  • where: empty list for "field" — when a list operator receives an empty array
  • where: unknown op "op" — for unrecognized operators
  • where: "field" takes a single value; use one_of/none_of for a list — for type mismatches
  • where: must be a map of field→predicate, or a list of single-field maps — for structural errors
  • Scalars and objects cannot be mixed: where: "field" mixes scalars and objects; use {one_of: [...]} or an op object
Evidence

Predicate operator definitions (search for "one_of" and "none_of")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

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