Stackit – Pruning LLM context windows using a branching chat UI

The ability to 'fork' a chat into nested child cards that preserve exact DOM selection and prune the history array is a clever, pragmatic answer to 'context pollution'. Real-time token streaming, local-only API key storage, and CSS tricks like contain: paint show attention to performance and privacy. It's a browser-hack that feels powerful for deep research, but it will remain fragile and tightly coupled to Gemini's UI unless it expands to other providers or formalizes a more stable integration layer.