Show HN: Commonplace Wiki – A Confluence Alternative Based on Git and OKF

I built Commonplace because I wanted to learn more about Google's Open Knowledge Format for knowledge sharing with human and agents. At the same time, Atlassian announced it will start using customer cloud data to train its AI models (opt-out is Enterprise-only), which made a self-hosted Confluence alternative feel timely.

The idea:

- Use a Git repository that follows Open Knowledge Format with plain Markdown - Commonplace is just a stateless frontend on top (nice UI, but no database, no backups, ...) of your GitHub or GitLab repo - Fully self-hosted, no cloud offering - Reuse the Git repository's access and permission model - AI agents can directly operate on the Git repo or through an MCP server

Read more on https://www.commonplace.wiki (which itself is a Commonplace instance)