Fork Terminal Skill
Spawn isolated terminal contexts for experimental commands, dependency testing, and risky operations without affecting the primary session.
Use Cases
Dependency Testing
Test package installations or version changes before committing:
code
/fork-terminal npm install some-new-package
Command Experimentation
Try potentially destructive or unknown commands safely:
code
/fork-terminal git rebase -i HEAD~5
Diagnostics
Run system diagnostics that might produce large output:
code
/fork-terminal npx tsc --noEmit --extendedDiagnostics
Build Testing
Test build configurations without polluting the main environment:
code
/fork-terminal npm run build -- --config=experimental
How It Works
- •Fork: Creates an isolated terminal context (new tmux pane if available, or background process)
- •Execute: Runs the provided command in isolation
- •Report: Returns output and exit code to the primary session
- •Cleanup: Automatically tears down the forked context
Isolation Rules
- •Forked terminal inherits read access to the project directory
- •File writes in the fork do NOT propagate to the primary session
- •Environment variables from the primary session are inherited (read-only)
- •The fork has its own process group for clean termination
Fallback Behavior
If tmux is not available:
- •Execute command in a subshell with redirected output
- •Capture stdout/stderr to temporary files
- •Return results to the primary session
- •Clean up temporary files
Cleanup
Forked terminals are automatically cleaned up when:
- •The command completes (success or failure)
- •The primary session ends
- •A timeout is reached (default: 5 minutes)