My Emacs configuration https://git.cjennings.net/dotemacs/atom?h=main 2026-07-02T04:00:47+00:00 2026-07-02T04:00:47+00:00 Craig Jennings c@cjennings.net 2026-07-02T04:00:47+00:00 urn:sha1:622a4d8c13a5037e064cf9caa3e917100f7f5cc9 A grazed F2 followed by a stray 2, s, or b invokes two-column mode, which replaces the buffer's mode-line-format with its own retro layout and spawns a 2C/ companion buffer. That's what mangled the modeline in an agent terminal: eat semi-char buffers don't forward F2, so the prefix was armed everywhere. Nothing of mine uses global F2 (markdown-mode's binding lives in its own map), so I unbound both routes to 2C-command. cj/modeline-reset repairs a hijacked buffer.