AGENT DESIGN · CONTEXT MANAGEMENT
Cursor shipped side chats this month: a way to ask a tangent question next to your main agent conversation without spending its context window on the detour, plus search across every thread you have ever opened. This is a small working demo of that shape, no real LLM behind it, just the pattern.
Watch Alley checkout build
The main thread is already mid-build. Open a side chat to chase a tangent, then decide whether the answer earns a spot back in the main context.
MAIN CONTEXT
1,860 tok
Main thread
YOU
Wire up checkout for Watch Alley: PHP pricing, Stripe test mode, confirmation email.
AGENT
Checkout route is in, cart totals compute in PHP, Stripe test keys wired. Confirmation email template still needs copy.
Side chat
Nothing open. Pick a tangent below and it lands here, off the main thread.
Open a tangent
Search every thread
WHY THIS MATTERS FOR CLIENT WORK
A long client build session accumulates context fast, and every tangent question, a pricing lookup, a naming reminder, a “wait what did we decide about the grid” moment, gets baked into that same window whether it matters later or not. Isolating the tangent to its own thread keeps the main run lean, and folding back only the conclusion (not the back and forth that produced it) is a cheap way to keep a long agent session coherent instead of bloated. The searchable archive is the other half: nothing asked in a side thread is actually lost.
Built 15 July 2026 · pattern sourced from Cursor's side chats release