Free Wizard Migrates ChatGPT History to Claude Projects — Key Lessons on Token Limits and RAG
A developer built a free migration wizard that moves ChatGPT conversation history into Claude Projects, addressing the common pain point of years of context locked in ChatGPT. The tool is available at quitgpt-memory-kit.vercel.app and requires no code — it was built using Claude itself.
Key Technical Lessons
- Token limits are per-file, not per-size: A clean 26MB JSON file can still trigger "knowledge exceeds maximum" errors. The fix isn't compression or summarization — it's splitting the data by topic into 4-5 separate files, each fitting within the limit.
- Claude uses RAG for large Project files: It doesn't read the entire file at once. Therefore, queries must be specific: "What did we discuss about the Q2 launch strategy" works much better than "what did we talk about last month."
What the Wizard Does
The step-by-step wizard handles the export from ChatGPT and imports it into Claude Projects, automatically classifying and organizing conversations. The author is open to questions about the classification logic or handling large exports.
Who It's For
Developers using AI coding agents who have accumulated history in ChatGPT and want to leverage Claude's project memory without losing context.
📖 Read the full source: r/ClaudeAI
👀 See Also
Argus: Open-Source VS Code Extension for Real-Time Claude Code Observability
Argus visualizes Claude Code agent steps in real-time inside VS Code, showing timeline, dependency graph, and cost/loop detection to debug token-wasting behavior.
Cowork Context Management Kit Solves Claude's File Overload Problem
A developer built a context management kit for Cowork after Claude AI was reading all 462 files in their project folder, causing performance issues and contradictions. The solution includes global instructions, a manifest file system, and a Cowork skill to prioritize relevant documents.
Open-source multi-account manager for Claude CLI enables profile switching
claude-multi-account is a CLI tool that creates isolated profiles for different Claude accounts, allowing instant switching without logging out. It supports shared settings, cloud backup, and works across Windows, Linux, macOS, and Termux.
Bifrost AI Gateway: Open-Source Tool Addresses AI Infrastructure Gaps
Bifrost is an open-source Go-based LLM gateway that provides automatic failover between providers, budget caps that reject requests, audit logging, and hooks for evaluation. Benchmarks show it's ~50x faster than LiteLLM at high throughput.