docs: document new capture_history option

README.md

@@ -60,6 +60,12 @@ require('cmp').setup({
 
         -- Keyword patch mattern
         keyword_pattern = [[\w\+]],
+
+        -- Capture full pane history
+        -- `false`: show completion suggestion from text in the visible pane (default)
+        -- `true`: show completion suggestion from text starting from the beginning of the pane history.
+        --         This works by passing `-S -` flag to `tmux capture-pane` command. See `man tmux` for details.
+        capture_history = false,
       }
     }
   }

doc/cmp-tmux.txt

@@ -55,7 +55,8 @@ To configure this extension, add an options table (defaults shown):
             all_panes = false,
             label = '[tmux]',
             trigger_characters = { '.' },
-            trigger_characters_ft = {} -- { filetype = { '.' } }
+            trigger_characters_ft = {}, -- { filetype = { '.' } },
+            capture_history = false,
           }
         }
       }