diff --git a/codemode.md b/codemode.md
index 900f723..8e9f4db 100644
--- a/codemode.md
+++ b/codemode.md
@@ -25,6 +25,9 @@ uvx lkr-dev-cli code-mode sandbox --code="return me()"
 
 # Execute Python script file
 uvx lkr-dev-cli code-mode sandbox --file=./path/to/script.py
+
+# Execute Python script file with injected variables (--var / -v)
+uvx lkr-dev-cli code-mode sandbox --file=./path/to/script.py --var project=my_project --var connection=my_connection
 ```
 
 ### 2. Starting the Server
diff --git a/lkr.md b/lkr.md
index 4042f5b..7f1fa58 100644
--- a/lkr.md
+++ b/lkr.md
@@ -10,6 +10,7 @@ $ lkr [OPTIONS] COMMAND [ARGS]...
 
 **Options**:
 
+* `--version`: Show the version and exit.
 * `--client-id TEXT`: [env var: LOOKERSDK_CLIENT_ID]
 * `--client-secret TEXT`: [env var: LOOKERSDK_CLIENT_SECRET]
 * `--base-url TEXT`: [env var: LOOKERSDK_BASE_URL]
@@ -262,6 +263,7 @@ $ lkr tools lookml [OPTIONS] COMMAND [ARGS]...
 #### `lkr tools lookml push`
 
 Push local files to Looker, removing files on the instance that aren't being pushed.
+If --file / -f is specified (or folder_name is a file), only that single file is pushed without deleting remote orphans.
 
 **Usage**:
 
@@ -276,6 +278,7 @@ $ lkr tools lookml push [OPTIONS] FOLDER_NAME
 **Options**:
 
 * `--project-id, --project TEXT`: Looker project ID to push to (if different from folder name)
+* `-f, --file TEXT`: Single file relative path (or absolute path) to push
 * `--deploy`: Commit and deploy to production after push
 * `--message TEXT`: Commit message when deploying  [default: push from lkr cli]
 * `--help`: Show this message and exit.
@@ -283,6 +286,7 @@ $ lkr tools lookml push [OPTIONS] FOLDER_NAME
 #### `lkr tools lookml pull`
 
 Pull remote files from Looker to local disk, removing local files that aren't on the instance.
+If --file / -f is specified, only that single file is pulled without deleting local orphans.
 
 **Usage**:
 
@@ -297,6 +301,7 @@ $ lkr tools lookml pull [OPTIONS] FOLDER_NAME
 **Options**:
 
 * `--project-id, --project TEXT`: Looker project ID to pull from (if different from folder name)
+* `-f, --file TEXT`: Single file relative path to pull from Looker
 * `--deploy`: Commit and deploy to production on Looker after pull
 * `--message TEXT`: Commit message when deploying  [default: pull from lkr cli then commit and deploy]
 * `--help`: Show this message and exit.
@@ -335,8 +340,25 @@ $ lkr code-mode [OPTIONS] COMMAND [ARGS]...
 
 **Commands**:
 
+* `sandbox`
 * `run`
 
+### `lkr code-mode sandbox`
+
+**Usage**:
+
+```console
+$ lkr code-mode sandbox [OPTIONS]
+```
+
+**Options**:
+
+* `-c, --code TEXT`: Execute Python code directly in the sandbox
+* `-f, --file TEXT`: Execute Python code from a file in the sandbox
+* `--dev-mode`: Run in dev mode
+* `-v, --var TEXT`: Inject variable as key=value pair (e.g. -v project=my_project)
+* `--help`: Show this message and exit.
+
 ### `lkr code-mode run`
 
 **Usage**:
diff --git a/lkr/codemode/main.py b/lkr/codemode/main.py
index a89ef1d..8894eca 100644
--- a/lkr/codemode/main.py
+++ b/lkr/codemode/main.py
@@ -1,6 +1,7 @@
 import ast
 import inspect
 import json
+import keyword
 import os
 import re
 import sys
@@ -223,6 +224,9 @@ def sandbox(
     dev_mode: bool = typer.Option(
         False, "--dev-mode", help="Run in dev mode"
     ),
+    var: list[str] | None = typer.Option(
+        None, "--var", "-v", help="Inject variable as key=value pair (e.g. -v project=my_project)"
+    ),
 ):
     if not code and not file:
         logger.error("Must specify either --code or --file")
@@ -239,8 +243,24 @@ def sandbox(
         except Exception as e:
             logger.error(f"Failed to read file {file}: {e}")
             raise typer.Exit(1)
-    else:
+    elif code:
         code_to_run = code
+    else:
+        raise typer.Exit(1)
+
+    if var:
+        var_defs = []
+        for v_str in var:
+            if "=" not in v_str:
+                logger.error(f"Invalid variable format: '{v_str}'. Must be key=value.")
+                raise typer.Exit(1)
+            k, v = v_str.split("=", 1)
+            k = k.strip()
+            if not k.isidentifier() or keyword.iskeyword(k):
+                logger.error(f"Invalid variable name: '{k}'. Must be a valid Python identifier and not a keyword.")
+                raise typer.Exit(1)
+            var_defs.append(f"{k} = {json.dumps(v)}")
+        code_to_run = "\n".join(var_defs) + "\n" + code_to_run
 
     global ctx_lkr
     ctx_lkr = (
diff --git a/lkr/codemode/readme.py b/lkr/codemode/readme.py
index efe8ec7..e08bcb7 100644
--- a/lkr/codemode/readme.py
+++ b/lkr/codemode/readme.py
@@ -13,6 +13,7 @@ def get_readme() -> str:
 6. **Efficiency**: Always use the `fields` parameter (e.g., `all_dashboards(fields="id,title")`) when listing many objects to prevent timeouts.
 7. **Nested Folders**: Use `folder_children(id)` to get sub-folders.
 8. **Search with Lookups**: If `help('pattern')` returns too many results and you want to see full details for all of them at once, use `search_with_lookups('pattern')`.
+9. **Injected CLI Variables**: When using `sandbox` with `--var key=value` flags, those variables are directly available in your code as top-level string constants.
 
 EXAMPLES: