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Capability Reporting (OSC 1337)
OSC 1337 ; RequestCapabilities queries the terminal to report all its supported capabilities at once. The response is OSC 1337 ; Capabilities=... ST with a structured list of supported features. This provides a single-query alternative to probing individual features, though adoption is currently limited to iTerm2.
How this is tested: Send OSC 1337 ; RequestCapabilities, verify the terminal responds with a capabilities list.
Analysis2026-03-26
Not supported by any tested terminal. Not supported by: Ghostty, Kitty, iTerm2, Terminal.app. Part of the Rich TUI baseline.
Supported by 0 of 11 backends (0%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ✗ no | No OSC 1337 capabilities response |
| Ghostty | 1.3.1 | ✗ no | No OSC 1337 capabilities response |
| VS Code | 1.112.0 | ✗ no | No OSC 1337 capabilities response |
| Warp | 0.2026.03.18.08.24.03 | ✗ no | No OSC 1337 capabilities response |
| Cursor | 2.6.21 | ✗ no | No OSC 1337 capabilities response |
| Kitty | 0.46.2 | ✗ no | No OSC 1337 capabilities response |
| Terminal.app | 2.15 | ✗ no | No OSC 1337 capabilities response |