I can't afford the $200+ per month subs needed to support full use of GSD so I'm investigating using it between Antigravity (with it's free timed windows for Gemini & Opus tokens) & Opencode using free or cheap AI models - being able to switch between these seamlessly as a project progresses.
So when my free tokens are expired in Antigravity, switching over to Opencode & progressing the project until the 3-5H or 5D window refreshes the free tokens in Antigravity.
AFAIK, this requires installing GSD in both Opencode & Antigravity but linking the together the different folders GSD uses as the working folder in each - .gsd in Antigravity & .planning in the Opencode GSD installation.
Just setting this up, atm, to check it out