.bimrc support added. Unlick traditional vim, it's not settings, but quick commands you can use in documents. README.md has details.

README.md

@@ -43,11 +43,34 @@ mode and supports:
   `4x`, `5w`, `5dw`, `3rX`, and `2s`
 - `Esc` return to command mode
 - `Ctrl+G` show file, modified state, line, and column info
+- `,name` then `Enter` run a command defined in `~/.bimrc` and insert its output
 - `:w`, `:w path`, `:q`, `:q!`, `:wq`, and `:wq path`
 
 There is no persistent ruler/status line. The bottom line is used only for
 commands, messages, and explicit `Ctrl+G` file info.
 
+## `~/.bimrc` commands
+
+`bim` can load simple command shortcuts from `~/.bimrc`. Each non-empty,
+non-comment line is a command name, an equals sign, and the shell command to run:
+
+```text
+date=date +'%A, %B %d, %Y'
+uuid=uuidgen
+```
+
+In command mode, type `,date` then `Enter` to run the configured `date` command
+and insert its standard output at the cursor. `Esc` cancels a pending command,
+and Backspace edits it before it runs. `bim` appends one space after inserted
+command output so short snippets are ready for continued typing.
+
+Commands are not run when `bim` starts. They only run when invoked explicitly
+with `,name`. `bim` does not source `~/.bimrc`; it parses command definitions as
+data. For safety, `~/.bimrc` must be a regular file owned by the current user,
+must not be a symlink, and must not be writable by group or other users.
+Command names may contain letters, digits, underscores, and hyphens, and must
+start with a letter or underscore.
+
 Run it with:
 
 ```bash