Most browser automation is either headless or bolted onto browsers designed for humans. Vessel flips that model: designed and optimized for agents with human visibility. Built for harnesses like Hermes Agent, Claude Code, BYOK API, and any MCP compatible client, Vessel gives autonomous agents a full Chromium browser with: 80+ MCP-native tools, persistent named sessions that survive restarts, supervisor sidebar with live approval, and agent optimized pipelines.