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Unknown APC diagnostics

Feature ID: diagnostics-unknown-apc. Type: feature.

Manual tests: just probe diagnostics-unknown-apc opens this feature's scenarios.

Browse under Diagnostics / Unknown controls. A scenario may exercise related features; its existence does not establish support.

Terminal compatibility

Missing records mean unknown. as-of identifies the assessed version or revision, not the first release to support a feature.

TerminalSupportAs ofNotes and evidence
AlacrittyUnknownUnversionedNo assessment recorded.
Apple TerminalUnknownUnversionedNo assessment recorded.
ConPTY (conhost)UnknownUnversionedNo assessment recorded.
ContourUnknownUnversionedNo assessment recorded.
DomTermUnknownUnversionedNo assessment recorded.
footUnknownUnversionedNo assessment recorded.
GhosttyUnknownUnversionedNo assessment recorded.
iTerm2UnknownUnversionedNo assessment recorded.
kittyUnknownUnversionedNo assessment recorded.
KonsoleUnknownUnversionedNo assessment recorded.
minttyUnknownUnversionedNo assessment recorded.
mltermUnknownUnversionedNo assessment recorded.
PuTTYUnknownUnversionedNo assessment recorded.
RevenantSupportedgit:ab0907105bf6a871ef473dfbc0e929c8ff6b4d11Completed APCs other than Kitty graphics and the glyph protocol are logged at info level with up to 256 payload bytes and a truncation flag; no reply, no permission. ESC ends an APC; CAN/SUB abort without a report. Other C0 bytes, including NUL, are retained as binary data. OSC/CSI remain invisible (upstream limitation).

Checked 2026-09-11.

test test

RLoginUnknownUnversionedNo assessment recorded.
stUnknownUnversionedNo assessment recorded.
tmuxUnknownUnversionedNo assessment recorded.
rxvt-unicodeUnknownUnversionedNo assessment recorded.
VTEUnknownUnversionedNo assessment recorded.
waystUnknownUnversionedNo assessment recorded.
WezTermUnknownUnversionedNo assessment recorded.
Windows TerminalUnknownUnversionedNo assessment recorded.
xtermUnknownUnversionedNo assessment recorded.
xterm.jsUnknownUnversionedNo assessment recorded.