Arrangement
What changes
A task, for example
ConversationChatGPT, Claude, Kimi, in a browser
you carry everything between turns
I paste a transcript; I carry the answer
Tool-using assistantthe same apps with files, code and search switched on
it runs code, reads files, searches
an agent loads a skill, fetches one page, then asks
Project agentClaude Code, Codex, Kimi Code, in one folder
a folder it reads every session
Claude Code reads this folder's brief and decisions first