OSC 8 hyperlinks landed in #3248, but detectCapabilities() returned
hyperlinks: true in the unknown-terminal fallback. Terminals that
silently swallow OSC 8 (most xterm-compatible hosts, tmux/screen
without passthrough) end up dropping the URL from rendered markdown
links entirely, since the fallback 'text (url)' rendering is skipped
whenever hyperlinks is true.
- Unknown terminals now default to hyperlinks: false.
- tmux and screen (TMUX env, TERM starting with tmux/screen) force
hyperlinks: false even when the outer terminal would otherwise
advertise OSC 8 support. Image protocols also left disabled.
- Added detectCapabilities tests covering the known-capable set and
the tmux/screen/unknown cases.
TerminalCapabilities already tracks hyperlinks: boolean and returns true
for Ghostty, Kitty, WezTerm, and iTerm2, but nothing generated OSC 8
sequences. This completes that stub.
Changes to packages/tui:
- terminal-image.ts: add hyperlink(text, url) and setCapabilities()
- index.ts: export hyperlink and setCapabilities
- utils.ts: extend AnsiCodeTracker to track active OSC 8 URLs
- process() now handles OSC 8 open/close sequences
- getActiveCodes() re-emits the OSC 8 open at each line start
- getLineEndReset() closes the OSC 8 hyperlink before each line break
This ensures hyperlinks wrap correctly across multiple lines.
- components/markdown.ts: link renderer uses hyperlink() when
getCapabilities().hyperlinks is true; falls back to (url) text
- Tests: new wrap-ansi tests for OSC 8 line-wrapping; terminal-image
tests for hyperlink(); markdown tests covering both code paths;
table-cell width test pinned to hyperlinks:false (checks raw columns)
closes#3239
Co-authored-by: AI (Pi/Claude Sonnet 4.6) <noreply@pi.dev>
Co-authored-by: Mario Zechner <badlogicgames@gmail.com>
Changed isImageLine() from using startsWith() to includes() to detect
Kitty and iTerm2 image escape sequences anywhere in a line, not just
at the start. This prevents TUI width checks from failing on lines
containing image data, which could cause crashes when rendering tool
results with images (e.g., when reading image files).
Also added comprehensive test coverage for isImageLine() including:
- Both iTerm2 and Kitty protocols
- Regression tests for long lines and terminals without image support
- Negative cases to ensure no false positives
Fixes crash: 'Rendered line exceeds terminal width' when image
escape sequences appear in output.
