Your ChatGPT and Claude threads are full of research, decisions, and frameworks you built over months. Export the archive, upload it, and keep that context available forever — under your account, encrypted, and no one else can see it.
Both ChatGPT and Claude let you download a full export of your conversation history.
conversations.json and HTML filesconversations.json file and optionally per-conversation HTML pages. You own all of it.
Two paths depending on how you want to work.
Open a new thread in PDC Dev Studio and attach your export ZIP as a file. The Studio reads the HTML and JSON files inside automatically — you can start asking questions about your conversation history immediately. No setup, no code.
Note: this path works within a single thread session. The ZIP content is read up to 50,000 characters per upload.
For a permanent, reusable Crystal you can query from any tool: extract the text from your conversations.json, then send it to POST /v1/compress. You get back a ctx_... handle that you can query indefinitely via POST /v1/context/run.
Get a free API key at Developers → API keys.
Once uploaded or compressed, you can ask questions against your own archived conversations: "What framework did I work out for X?", "What did I research about Y six months ago?", "Summarize my decisions on Z."
The answers are grounded in your own words, not a general model. You are the source.