go-ahead

River turns chat into a canvas. Every message is a card, every tangent a branch, every turning point a flag. An agent works alongside you as a cartographer — surfacing angles, drawing connections, marking pivots — so the graph of your thinking becomes something you can see, navigate, and build on. Three background micro-agents (skeptic, assumption-checker, expander) offer fresh lenses each turn; tap one to steer the next reply without typing a word. Persistent per-project agent sessions on Opus 4.7 mean it comes back knowing you.