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

# mellea.core

> Core abstractions for the mellea library.

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Core abstractions for the mellea library.

This package defines the fundamental interfaces and data structures on which every
other layer of mellea is built: the [`Backend`](backend#class-backend), [`Formatter`](formatter#class-formatter), and
[`SamplingStrategy`](sampling#class-samplingstrategy) protocols; the [`Component`](base#class-component), [`CBlock`](base#class-cblock), [`Context`](base#class-context), and
[`ModelOutputThunk`](base#class-modeloutputthunk) data types that flow through the inference pipeline; and
[`Requirement`](requirement#class-requirement) / [`ValidationResult`](requirement#class-validationresult) / [`PartialValidationResult`](requirement#class-partialvalidationresult) for constrained generation. Start here when
building a new backend, formatter, or sampling strategy, or when you need the type
definitions shared across the library.