docs(CHANGES): libtmux 0.59.0 floor bump, tmux 3.7

tony · tony · commit 08ceece5540e · 2026-06-27T13:51:56.000-05:00
why: Record the libtmux floor bump and tmux 3.7 support under the
1.71.0 unreleased block. The release lead paragraph and version
header are added by the maintainer at tag time, not by this PR.

what:
- Record the libtmux ~=0.58.1 -&gt; ~=0.59.0 floor bump under Dependencies
- Note tmux 3.7 support, the CI matrix addition, and the reworded pane
  error under What's new
diff --git a/CHANGES b/CHANGES
@@ -44,6 +44,16 @@ $ tmuxp@next load yoursession
 _Notes on the upcoming release will go here._
 <!-- END PLACEHOLDER - ADD NEW CHANGELOG ENTRIES BELOW THIS LINE -->
 
+### Dependencies
+
+#### Minimum `libtmux~=0.59.0` (was `~=0.58.1`) (#1057)
+
+### What's new
+
+#### tmux 3.7 support (#1057)
+
+tmuxp now runs on tmux 3.7, which CI builds and tests alongside 3.2a through 3.6 and `master`. The bump to libtmux 0.59.0 works around an upstream tmux 3.7 regression that crashed the server on `break-pane`. tmux 3.7 also reworded the "no space for new pane" error tmuxp asserts on when a workspace overflows the window, so the regression test now matches both the old and new phrasing.
+
 ## tmuxp 1.70.1 (2026-06-16)
 
 tmuxp 1.70.1 bumps libtmux to 0.58.1, fixing a pytest 9.1 plugin import failure that broke test collection for projects using tmuxp's or libtmux's fixtures.
