The :mod:`amaranth.lib` module, also known as the standard library, provides modules that falls into one of the three categories:
- Modules that will used by essentially all idiomatic Amaranth code, or which are necessary for interoperability. This includes :mod:`amaranth.lib.enum` (enumerations), :mod:`amaranth.lib.data` (data structures), :mod:`amaranth.lib.wiring` (interfaces and components), :mod:`amaranth.lib.meta` (interface metadata), and :mod:`amaranth.lib.stream` (data streams).
- Modules that abstract common functionality whose implementation differs between hardware platforms. This includes :mod:`amaranth.lib.memory` and :mod:`amaranth.lib.cdc`.
- Modules that have essentially one correct implementation and are of broad utility in digital designs. This includes :mod:`amaranth.lib.fifo`, and :mod:`amaranth.lib.crc`.
As part of the Amaranth backwards compatibility guarantee, any behaviors described in these documents will not change from a version to another without at least one version including a warning about the impending change. Any nontrivial change to these behaviors must also go through the public review as a part of the Amaranth Request for Comments process.
The Amaranth standard library is separate from the Amaranth language: everything provided in it could have been implemented in a third-party library.
.. toctree:: :maxdepth: 2 stdlib/enum stdlib/data stdlib/wiring stdlib/meta stdlib/stream stdlib/memory stdlib/io stdlib/cdc stdlib/fifo stdlib/crc