Root cause of the persistent split-view 花屏: xterm's WebGL addon shares
ONE TextureAtlas across terminal instances with equal config (font / size
/ theme / DPR) — acquireTextureAtlas does `if (configEquals) { ownedBy.push;
return atlas }`. Two split panes then share an atlas, so the
clearTextureAtlas calls netcatty makes to recover from glyph corruption
(on resize / DPR / font change / tab show, from #1049 and #1066) clobber
the *other* pane's rendering. That's why the earlier redraw/clear-based
recovery attempts didn't help and only bounced the garble between panes.
Disable the sharing: remove the "reuse a matching atlas" loop so every
terminal creates its own atlas. The published bundle is minified, so this
is done with a small idempotent postinstall script (a patch-package patch
would be a ~550KB unreadable blob of the whole minified line). It
string-replaces the exact loop in the CJS + ESM builds, runs after
patch-package, and warns without failing if @xterm/addon-webgl changes.
Verified: split-view WebGL no longer garbles; script is idempotent
(patched=2 → already=2) and the production build is unaffected.
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
e5d3d02b17