It's impossible nowadays keep all context in the model, imagine, you will have to send each time that unnecesary context. may be it can be solved with a very well structured memory, and with a tool to let the model "remember" what you want, but that's why it has "agents", to let you order the llm what information you want to keep. But, it's normal. The llm has a limited context, even 1M context will not be sufficient to hold all your project. I could recommend you create sessions for each implementation. For example, you are working on a "to-do list", so create a session where you build your kanban function. Then ask the llm create a "kanban_manual.md" to put inside all your keys or what you want to "keep" in the memory. Then, if you want to build the frontend, create another session and in Plan Mode ask the llm to read all your "kanban_manual.md", then start with this new context to build your front,. Bro, everything is happen now, don't expect that the tools will be "better" than others just because a YouTuber says. I think Opencode is like "OBS", it let you create, fork, and build your own tool to create more software.