Package Catalog

The package catalog is system.packages. It indexes installable packages by their declared metadata so consumers can answer "what can I install that does X?" without downloading every tarball.

For the high-level "what is the package catalog?" see Overview / Package catalog. This section zooms into the field shape, search semantics, and how each kind of metadata is consumed.

Pages

• Metadata — the per-package field shape
• Search — registry.search op and ranking
• Capabilities — provided/required capabilities
• App surfaces — webapp declarations
• Compatibility — version-range and runtime compatibility
• Documentation links — README, homepage, repo

Source: Implementation is projects/matrix-3/packages/system-catalog/src/SystemPackageRegistryActor.ts. Field shape is defined by WORKSTREAMS/core-and-packaging/MATRIX-DISCOVERY-METADATA-SPEC.md.