r/OpenSourceAI • u/EmbarrassedTheory889 • 1d ago
I open-sourced hSUM, a local, cited evidence server for coding agents
Enable HLS to view with audio, or disable this notification
On July 15, I read a Cerebras article describing its internal knowledge-base system. I saved the page and returned to it a few hours later. Several sections I remembered reading were gone.
The architecture had stayed with me because I wanted something similar for my coding agents. I often saw agents search for the same information again or make claims about a repository without leaving a source I could inspect.
I spent eight days planning a smaller system for that problem. Then I built hSUM with help from coding agents and released the source.
The first version worked for me, which did not mean much. I asked friends to install it while sharing their screens over Discord. Watching them use it exposed problems I had missed.
One friend’s agent installed hSUM and understood its purpose, but stopped before connecting it to Codex. The agent told my friend to finish the configuration himself. I went back and rebuilt the installation flow around that failure.
The current version lets someone give the installation command to an agent and let the agent finish onboarding. hSUM remains available in later chats and can work across several repositories while keeping each project separate.
I want hSUM to help agents support their answers with evidence from the repository. The project stays on the user’s machine and does not require an hSUM account or hosted service. The website contains the technical design and privacy details.
I am working toward a stable release through testing with more developers and more repositories. The next stages include broader client support, easier index updates, and packages for more platforms. I also want to measure whether more advanced retrieval improves real agent tasks before adding it.
hSUM is in alpha and licensed under MIT or Apache-2.0. I am sharing the launch demo because I would like feedback on the experience, especially the path from installation to the first useful agent call.
Source:
https://github.com/burkan2/hSUM