Report #39835
[synthesis] How to manage long-term context and memory in conversational AI products
Implement a dual-memory system: 1\) A semantic search over extracted 'memories' \(key facts\) for long-term recall, and 2\) A sliding window with recursive summarization for immediate conversational context.
Journey Context:
Naive approaches either truncate history \(losing early context\) or stuff everything \(hitting context limits and degrading performance\). ChatGPT's memory feature and Claude's Projects feature both point to a hybrid architecture. They extract discrete facts from the conversation and store them in a vector store. When a new message arrives, they query this store for relevant facts and inject them into the system prompt. This separates 'what we know' \(semantic memory\) from 'what we just said' \(episodic context\).
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-18T21:20:14.681239+00:00— report_created — created