How to Keep Context When Switching Between AI Tools
How to keep context when switching between ChatGPT, Claude and coding agents: one project brief, a handoff note after each session, and where to store it.
Quick answer: To keep context when switching between ChatGPT, Claude and coding agents, keep one project brief as the source of truth, end every AI session by asking for a short handoff note, and start the next tool from the updated brief. Store the stable parts where each tool reads them: Projects, AGENTS.md or CLAUDE.md.
Why context gets lost between AI tools
Most people who use AI for real work use more than one tool. You think an idea through in ChatGPT, write it up in Claude, then hand it to a coding agent like Claude Code, Codex or Cursor to build. Each switch means copying background, re-explaining decisions and hoping you pasted the latest version.
A thread in r/ChatGPTPro this week asked how people keep project context when switching between AI tools, and the replies pointed at the same two problems:
- Re-explaining. The backstory, constraints and preferences get typed out again in every new chat.
- Version drift. The bigger problem. You agree on approach A in one tool, settle on B in another an hour later, and the coding agent builds A because the context it got was from before lunch.
Copying is annoying. Version drift is what costs you a day. Both come from the same cause: the context lives in chat histories, and no chat history is shared between tools.
Keep one project brief as the source of truth
The fix that came up most is the simplest: one running document per project, outside any AI tool, that you update as decisions change. Every tool gets its context from that file, never from another chat.
Keep it short enough to paste whole. A template:
# [Project name]: brief
Last updated: [date]
## Goal
[One or two sentences: what done looks like]
## Current status
[What exists now, what's in progress]
## Decisions (and why)
- [Decision] because [reason]. ([date])
- [Rejected option] rejected because [reason].
## Constraints and preferences
[Stack, tone, audience, budget, things to avoid]
## Open questions
- [Question]
## Next steps
1. [Step]
The "and why" matters most. A decision without its reason gets re-argued by the next model, and you end up undoing it. A rejected option with its reason stops the next tool from suggesting it again.
End every AI session with a handoff note
Before you close a session, ask the AI to summarize it in a form the next tool can use. A prompt that works in ChatGPT, Claude or any agent:
Write a handoff note for another AI assistant picking up this work. Include: decisions we made and why, anything we changed from the original plan, open questions, and the next three steps. Keep it under 200 words and don't include anything we didn't discuss.
Then do two things with the note:
- Update the project brief. Paste in the decisions and change the status. This is the step that prevents version drift.
- Start the next tool from the brief, not from the note alone. The note says what just happened; the brief says what's true now.
Read the note before you use it. Models sometimes summarize what they suggested rather than what you agreed, and that's exactly the drift you're trying to avoid.
Where to store context in each AI tool
Pasting the brief every time works anywhere. Where a tool can read context automatically, put the stable parts there so you only paste what changed.
| Tool | Where context lives | What to put there |
|---|---|---|
| ChatGPT | A Project, which keeps related chats, files and instructions together | Project instructions plus the brief as a file |
| Claude | A Project, with project knowledge and project instructions | The brief in project knowledge, preferences in instructions |
| Claude Code | CLAUDE.md in the repo, which Claude reads at the start of every session |
Build steps, conventions, current decisions |
| Codex, Cursor and other coding agents | AGENTS.md, an open format for guiding coding agents |
The same build steps and conventions |
If you use Claude Code alongside other coding agents, keep the shared instructions in AGENTS.md and import it from CLAUDE.md with a line that says @AGENTS.md. Claude Code's memory docs describe this @path import syntax, and it means you edit one file instead of two that slowly disagree.
For coding work, ask the agent to keep the brief itself up to date in a Markdown file in the repo. Then the next agent reads it from the repo instead of from your clipboard.
Moving to a new AI tool for good
Switching tools permanently is a different job from switching several times a day. If you're moving from ChatGPT to Claude, Claude has a memory import: you paste a prompt into your old assistant and paste its answer into Claude's memory settings. Move your project briefs and the instructions you actually use, not your whole chat history.
How Blip AI speeds up AI handoffs
Every step above is writing: the brief, the handoff prompt, the decisions and the reasons for them. The reasons are what people skip when they're typing, and they're the part that stops the next tool from undoing your work. Blip AI lets you say them instead. Speech runs at about 150 words per minute, against about 52 for the average typist.
- Talk through the brief. Click into your project doc, hold Fn on Mac, Ctrl + Win on Windows or Ctrl + Super on Linux, and say what changed and why. Let go and the text appears, with filler words removed and punctuation fixed.
- Give each tool more context. Saying three sentences of background into ChatGPT, Claude or Cursor takes seconds, so you stop cutting it short.
- Same hotkey everywhere. Blip works in any app with a text field, including ChatGPT, Cursor, VS Code and terminals, so the brief, the chat and the coding agent all take dictation the same way. See voice in Claude Code and voice typing in Cursor for setup.
- Spell project names right. Add product names, libraries and jargon to Blip's dictionary so they come out right every time.
The free plan includes 2,000 words a month. Download Blip AI for Mac, Windows or Linux.
FAQ
How do I transfer context from ChatGPT to Claude? For ongoing work, keep a project brief outside both tools and paste it into a Claude Project's knowledge. For a permanent move, Claude's memory import gives you a prompt to run in ChatGPT and a place in Claude's settings to paste the result.
How do I stop AI tools from working from outdated decisions? Keep one project brief as the source of truth, update it at the end of every AI session with a handoff note, and start each new tool from the brief rather than from another chat. This stops version drift between tools.
What should a handoff note between AI tools include? A handoff note should include the decisions made and why, anything that changed from the original plan, open questions and the next steps. Keep it under about 200 words so it's easy to check and paste.
Does Claude Code read AGENTS.md? Claude Code reads CLAUDE.md files as its project instructions, and its docs describe when AGENTS.md is loaded too. The simplest way to share one set of instructions is to keep them in AGENTS.md and add @AGENTS.md to CLAUDE.md.
Is it better to use one AI tool instead of switching? Using one tool avoids handoffs entirely, and for many people that's the right call. If different tools are genuinely better at different steps, such as planning, writing and coding, a project brief and handoff notes make switching cheap.