Rust libraries

This document explains what libraries are available for writing and reading Inspect data in Rust. For specific documentation of each library, refer to the crate documentation linked on each section.

Libraries for writing Inspect


This is the core library. This library offers the core API for creating nodes, properties, serving Inspect, etc. Internally it implements the buddy allocation algorithm described in Inspect vmo format.

For an introduction to Inspect concepts and the rust libraries, see the codelab.


This library enables components to serve Inspect and make it available to the Archivist for collection.

It's intended to be used only by component binaries, not libraries. The reason for this is that this library provides an expect_includes check to verify that component manifests are configured to expose Inspect.

Avoid depending on inspect-runtime from libraries so that tests are not forced to add the Inspect client.shard.cml.


This library is intended for contributions to the Inspect library from clients. These are patterns that clients identify in their usage of Inspect that they can generalize and share. It’s intended to be at a higher level than fuchsia-inspect.


This library provides a convenient way to manage Inspect data in a Rust program through a #[derive(Inspect)] procedural macro. This works at a higher level than fuchsia-inspect. For more information on this library, see Ergonomic Inspect.

Libraries for reading Inspect

These libraries are not specific to Inspect and are used for various kinds of diagnostics data.


This library includes the convenient macro assert_data_tree for testing as well as the definition of the DiagnosticsHierarchy, which is not exclusive to Inspect and is also used for logs and other diagnostics data sources.


This library includes the convenient EnvForDiagnostics which is useful for testing Inspect integration with legacy components.


This library includes the convenient ArchiveReader which is useful for fetching Inspect data from an archivist in a test or in production. It wraps the shared logic of connecting to the ArchiveAccessor and fetching data from it.



This library provides an API for reading and writing the blocks of the Inspect VMO format.