If you are working by yourself, no need to over complicate it, I have three terminal sessions open - Claude, Codex and one for testing that has my AWS credentia

If you are working by yourself, no need to over complicate it, I have three terminal sessions open - Claude, Codex and one for testing that has my AWS credentials. I tell both Claude Code and Codex to keep the same markdown file updated where I keep my progress, requirements, decisions, thought process etc updated