> For the complete documentation index, see [llms.txt](https://docs.omnitalk.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.omnitalk.io/commons.md).

# Commons

- [Precondition](https://docs.omnitalk.io/commons/precondition.md)
- [Call Flow](https://docs.omnitalk.io/commons/call-flow.md)
- [Event Message](https://docs.omnitalk.io/commons/event-message.md)
- [SDK State](https://docs.omnitalk.io/commons/sdk-state.md)