I Built a Fleet Manager for AI Coding Agents — Here's Why Single-Agent IDEs Aren't Enough

The Problem Nobody Talks About Every AI coding tool in 2026 supports multi-agent workflows. Claude Code spawns sub-agents. Cursor runs background agents. Windsurf has cascading flows. Devin operates autonomously. JetBrains Junie works alongside you. Even Gas Town and Microsoft's Agent Framework are entering the space. But here's the thing: none of them manage a fleet. When you run 5 agents on the same codebase, you need answers to questions none of these tools ask: Who owns which files right now? Which agent is waiting for human approval before sending that email? How much is each agent costing me per hour? Can Agent B see what Agent A just committed? What happens when two agents edit the same module? I ran into these problems daily while coordinating Claude Code, Codex, and Qwen on a single project. Agents would overwrite each other's work. Nobody knew who was doing what. Cost tracking was a spreadsheet I updated manually. So I built Bridge ACE. What Bridge ACE Is Bridge ACE is a loca