Claude Code exits without warning mid-session (Windows)

Description

Claude Code exited without warning in the middle of an active session. No error message, no crash dialog — the process just terminated silently.

Environment

• OS: Windows 10 Pro 10.0.19045
• Shell: bash (Git Bash)
• Model: Claude Opus (claude-opus-4-6)
• Claude Code version: Latest (as of 2026-04-18)

What was happening

• Working inside a Tauri v2 + Rust + React project (desktop app)
• Executing a GSD workflow phase plan (phase 04, plan 06)
• Mid-way through applying code changes across ~17 files (TypeScript, Rust, HTML, JSON)
• Session had been running for a while with heavy tool use (file reads, edits, bash commands)

Impact

• Session context lost entirely — had to resume manually in a new conversation
• No data loss thanks to git working tree preserving uncommitted changes
• User had to reconstruct what was in-flight by inspecting git diff

Expected behavior

• If Claude Code needs to exit, it should display a clear error/reason
• Ideally, session state should be recoverable (the session resume mechanism exists but wasn't triggered since exit was abrupt)

Steps to reproduce

Not reliably reproducible — happened once during a long session with heavy file editing across a Tauri project.

Additional context

The session was doing substantial multi-file edits (426 additions, 319 deletions across 17 files) as part of a planned workflow. The work was coherent and nearly complete when the exit occurred, suggesting it wasn't caused by a code generation error but rather an infrastructure/process issue.