fix(keybindings): retire the two-column F2 and C-x 6 bindings

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.

1 files changed, 6 insertions, 0 deletions

diff --git a/modules/keybindings.el b/modules/keybindings.el
index 7072cb9c..3e51b2dd 100644
--- a/modules/keybindings.el
+++ b/modules/keybindings.el
@@ -147,6 +147,12 @@ Errors if VAR is unbound, not a non-empty string, or the file does not exist."
 ;; ---------------------------- General Keybindings ----------------------------
 
 ;; Avoid hostile bindings
+;; two-column mode (2C-command): a grazed F2 + a stray 2/s/b replaces the
+;; buffer's mode-line-format with 2C's own retro layout and spawns a 2C/
+;; companion buffer.  eat semi-char buffers don't forward F2, so the trap
+;; is armed everywhere.  cj/modeline-reset repairs a hijacked buffer.
+(keymap-global-unset  "<f2>")      ;; 2C-command prefix
+(keymap-global-unset  "C-x 6")     ;; 2C-command prefix (same map)
 (keymap-global-unset  "C-x C-f")   ;; find-file-read-only
 (keymap-global-set  "C-x C-f" #'find-file)
 (keymap-global-set  "C-z" (make-sparse-keymap)) ;; replace suspend-frame with prefix map