Frequent session crashes on Windows (30+ in 2 days)

Frequent session crashes on Windows (30+ in 2 days)

Description

Claude Code sessions crash frequently on Windows — over 30 crashes in the past 2 days. The session simply dies mid-conversation with no error message or stack trace. This happens during normal usage (reading files, spawning background agents, git operations).

Environment

• Claude Code version: 2.1.50
• OS: Windows 11 Pro (Build 26200, version 10.0.26200)
• Shell: MSYS2/MINGW64 bash (3.3.6-341.x86_64)
• Node.js: v22.17.0
• Model: Claude Opus 4.6

Reproduction

No single trigger identified. Crashes occur across various activities:

• During background agent execution (Task tool with run_in_background: true)
• During normal file reads and git operations
• Mid-conversation with no tool calls active
• Sometimes immediately after a tool result returns

Usage pattern that may be relevant

• Large monorepo (Flutter + Serverpod + Dart)
• Multiple MCP servers configured (Playwright, Chrome DevTools, screen-capture, windows-screenshots)
• Frequent use of background agents (worktree isolation)
• Git worktrees active under .claude/worktrees/
• Long-running sessions with substantial context

Impact

• Severe workflow disruption — every crash requires re-establishing context
• Background agents lose their work if they haven't committed
• ~15+ crashes per day makes sustained work very difficult

Expected behavior

Sessions should remain stable for extended use, or at minimum provide an error message / crash log when terminating unexpectedly.

Additional context

No crash logs found in ~/.claude/logs/. The session terminates silently — the terminal just returns to the prompt with no error output. There is no opportunity to see what went wrong.