Plug here for a python app I wrote, no dependencies. It uses a skill to maintain an index, links, archival, and works with a separate opinionated dev playbook nicely. The best part is now the docs/specs folder maintains itself. (and I can spawn a new session with all the relevant context every time)
https://github.com/ArtRichards/docs-cli
and
https://artrichards.github.io/agent-playbook-suite/blog/