While #Fedify's #Vocabulary API provides comprehensive support for #ActivityPub and major vendor extensions, its code-generation approach makes runtime extensions challenging. However, the project welcomes contributions to expand the supported types and properties.
Fedify accepts vocabulary contributions when they meet any of these criteria:
- Documented in FEP (Fediverse Enhancement Proposals) or equivalent specification
- Already adopted by widely-used #fediverse implementations like Mastodon or Pleroma
- Thoroughly discussed within the Fedify community (Discord, Matrix, GitHub Discussions)
Contributing new vocabulary is straightforward. The vocabulary definitions live in YAML files within the fedify/vocab/ directory. To add a new type, create a new .yaml file. To add properties to existing types, extend the properties section in the relevant .yaml file.
This approach ensures Fedify's vocabulary coverage grows with the fediverse ecosystem while maintaining type safety and comprehensive documentation. If you're working with custom ActivityPub extensions, consider contributing them upstream to benefit the entire community.
For detailed guidance on the contribution process, see the Extending the vocabulary section in Fedify's docs.