Anyone have tried and maybe even got to work running more than one coding agent with spec-kit in one and the same project?

Background: I have been running spec-kit with Claude code for some time and impressed with the workflow and quality so far. However, I also have access to Gemini as well as OpenAI Codex. When weekly Claude code quotas are used up it would be nice to be able to "continue" with one of the others. Anyone got this to work or would it just mess things up?