Vim mode (#3936)

docs/cli/commands.md

@@ -95,6 +95,17 @@ Slash commands provide meta-level control over the CLI itself.
 - **`/quit`** (or **`/exit`**)
   - **Description:** Exit Gemini CLI.
 
+- **`/vim`**
+  - **Description:** Toggle vim mode on or off. When vim mode is enabled, the input area supports vim-style navigation and editing commands in both NORMAL and INSERT modes.
+  - **Features:**
+    - **NORMAL mode:** Navigate with `h`, `j`, `k`, `l`; jump by words with `w`, `b`, `e`; go to line start/end with `0`, `$`, `^`; go to specific lines with `G` (or `gg` for first line)
+    - **INSERT mode:** Standard text input with escape to return to NORMAL mode
+    - **Editing commands:** Delete with `x`, change with `c`, insert with `i`, `a`, `o`, `O`; complex operations like `dd`, `cc`, `dw`, `cw`
+    - **Count support:** Prefix commands with numbers (e.g., `3h`, `5w`, `10G`)
+    - **Repeat last command:** Use `.` to repeat the last editing operation
+    - **Persistent setting:** Vim mode preference is saved to `~/.gemini/settings.json` and restored between sessions
+  - **Status indicator:** When enabled, shows `[NORMAL]` or `[INSERT]` in the footer
+
 ### Custom Commands
 
 For a quick start, see the [example](#example-a-pure-function-refactoring-command) below.