Add MCP tool serving to any Rails app. Write @rbs type annotations with predicate tags (@requires, @feature, or custom) and the gem compiles per-user JSON Schema automatically — filtering fields by permissions, feature flags, and plan tiers at request time.

Declare prompts as Ruby classes with versioned configurations, route traffic by percentage or predicate, record telemetry, and automatically roll back misbehaving versions.

Ennui provides a library of predicates which return true at various frequencies.

By defining predicate methods which are, with the addition of '?', named the same as state machine events, and then configuring an in memory or cron-based event loop, the state machine will change state automatically.

Convert your predicate_methods? into bang_methods! without abusing method_missing.

A DSL for aggregating data from multiple sources into ActiveRecord models. Includes options for aliases, predicates, associations, and complex attributes.

Predicates and conditions that extends to the ActiveRecord 3

Boolminot represents Elasticsearch clauses as predicates.