Components

This section contains documentation about components in the new component framework (components v2).

Components are the basic unit of executable software on Fuchsia.

Architectural concepts

Introduction: What are components and the component framework.
Component manager: The runtime.
Declarations: Describe components themselves.
Component URLs: URLs that identify components.
Lifecycle: Component instance progression from creation to destruction.
Topology: The relationships among component instances.
Realms: Sub-trees of the component instance topology.
Monikers: Identifiers for component instances based on the component topology.
The difference between components and processes: The relationship between components and processes.

Capabilities: Different types of capabilities and how to route them between components.
Component manifests: How to define a component for the framework.
ELF runner: How to launch a component from an ELF file. Typically useful for developing system components in C++, Rust, or Go.

Runners: Instantiate components; add support for more runtimes.
Resolvers: Find components from URLs; add support for methods of software packaging and distribution.

Design principles: Guidelines for arriving at architectural decisions.
Life of a protocol open: How components connect to protocols in their namespaces.