When Claude sessions were terminated using KillSession(), bash subprocesses
spawned by Claude's Bash tool could survive because they ignore SIGHUP.
This caused zombie processes to accumulate over time.
Changed all critical session termination paths to use KillSessionWithProcesses()
which explicitly kills all descendant processes before terminating the session.
Fixes: gt-ew3tk
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Define the Connection interface that abstracts file operations, command
execution, and tmux management for both local and remote (SSH) contexts.
Includes:
- Connection interface with file, exec, and tmux operations
- FileInfo interface for remote stat results
- BasicFileInfo implementation with JSON serialization
- Error types for connection failures
This enables Gas Town to manage rigs on remote machines using the
same interface as local operations.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
