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WT_SESSION env variable
$WT_SESSIONThe
WT_SESSION environment variable is set by Windows Terminal to a GUID that uniquely identifies the current terminal session. A companion variable, WT_PROFILE_ID, identifies the Windows Terminal profile that launched the shell.
Applications use WT_SESSION as the canonical way to detect Windows Terminal, since older versions did not set TERM_PROGRAM and the TERM value on Windows is typically inherited from the underlying console host rather than chosen by Windows Terminal itself.How this is testedmanual
Manual verification required — no automated probe available.
Manual verification required — no automated probe available.
The same probe runs against headless backends (via Termless) and real terminal apps (via a daemon launched in each terminal). This lets us distinguish parser correctness from rendering correctness.
Supported by 0 of 14 backends (0%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ? unknown | |
| Ghostty | 1.3.1 | ? unknown | |
| Terminal.app | 2.15 | ? unknown | |
| Kitty | 0.46.2 | ? unknown | |
| VS Code | 1.113.0 | ? unknown | |
| Warp | 0.2026.03.18.08.24.03 | ? unknown | |
| Cursor | 2.6.21 | ? unknown |