Running 5+ Claude Code Agents in Parallel - Session Title Corruption Explained
Session Title Corruption With Parallel Claude Code Agents
If you run multiple Claude Code agents in parallel on the same codebase, your session list is basically unusable. Titles get swapped, sessions show the wrong context, and finding a specific conversation becomes a guessing game. The root cause is now identified, and it explains a lot.
The Problem
Claude Code's VS Code extension stores session metadata in a way that creates race conditions when multiple instances write simultaneously. When Agent A finishes a task and updates its session title at the same moment Agent B does the same, the titles can get crossed. Your "refactor auth module" session now shows "update README" as its title, and vice versa.
This is not just cosmetic. When you are managing five or more parallel agents - each working on a different feature or fix - the session list is your primary navigation tool. When it is corrupted, you lose the ability to quickly context-switch between agent conversations.
The Workaround
Until this is fixed upstream, the practical workaround is to use external tracking. Keep a simple document mapping agent tasks to session IDs. When you start a new agent, note its session ID and what you asked it to do. This is manual overhead, but it is less overhead than clicking through corrupted session titles trying to find the right conversation.
Why Parallel Agents Matter
Running agents in parallel is not a power-user edge case. It is the natural workflow for any developer using AI coding tools seriously. While one agent refactors a module, another writes tests, and a third updates documentation. The tooling needs to support this pattern natively.
The same challenge applies to desktop agents. When multiple agents operate on the same machine simultaneously, coordination and session management become critical infrastructure - not optional features.
Fazm is an open source macOS AI agent. Open source on GitHub.