Syntropy (YC W26, syntropy.io) is building the next generation of agentic coding tools for long-horizon tasks. As AI coding tools improve week over week, the upper bound looks great - but the practical workflow still demands heavy user orchestration. For most teams, “autonomous” still means hovering over a terminal for hours. Syntropy completely automates this experience. Co-write a spec with the agent, then Syntropy executes end-to-end in the background: PRD generation with verification loops, phased task breakdown, parallel execution in isolated worktrees, testing, and merging everything back together - go out for lunch and come back to a production-ready PR. Syntropy also joins your Slack to send updates right as tasks complete, and fully supports custom MCP integrations. Public access is opening now for teams building real products in real repos! Get started today at syntropy.io, or reach out at founders@syntropy.io. Syntropy: YC Winter 2026: Syntropy: The agentic coding app for complex tasks