My Emacs configuration https://git.cjennings.net/dotemacs/atom?h=load-graph-classify-end 2026-05-14T05:19:44+00:00 2026-05-14T05:19:44+00:00 Craig Jennings c@cjennings.net 2026-05-14T05:19:44+00:00 urn:sha1:6a4f1a1185dd4a7d316376491ff814eea83b9cc0 The original fix (9600611) set a flag at toggle-off and let the next toggle-on detect it. The flag mechanism is right, but the toggle-off itself wasn't observable when bury-buffer couldn't switch the lone window onto a different buffer -- `bury-buffer' falls back to `switch-to-prev-buffer', which no-ops when the window's prev-buffer history contains only the agent itself (common right after a `C-x 1' that cleared the surrounding windows' histories). Without an observable swap, the second F9 found the agent still displayed and routed back through toggle-off, looping the user with no visible effect. Dispatcher now explicitly forces the window onto another buffer (`(other-buffer agent-buf t)`) when the lone window is still showing the agent after `bury-buffer'. The round-trip test now exercises the real `bury-buffer' path instead of simulating it; a new test asserts the lone window's buffer is non-agent after toggle-off. 2026-05-13T20:33:38+00:00 Craig Jennings c@cjennings.net 2026-05-13T20:33:38+00:00 urn:sha1:9600611d5f8382ffc849d56a67ba5eb980d64e04 When the agent buffer is the only window in the frame, F9 buries it (correct) but the next F9 redisplayed it as a side split instead of restoring the full-frame layout -- the display-saved path always called `display-buffer-in-direction`, which insists on a split. New `cj/--ai-vterm-last-was-bury` flag tracks which toggle-off path ran. `cj/ai-vterm` sets it to t in the bury branch (one-window-p) and nil in the delete-window branch. `cj/--ai-vterm-display-saved` checks the flag at toggle-on: if t and the frame is still single-window, it replaces the selected window's buffer in place rather than splitting. Either branch consumes the flag so it never stays stale. 5 tests in test-ai-vterm--single-window-toggle.el cover the flag's set/clear paths, the still-one-window guard, and the end-to-end roundtrip.