added env var support

README.md

@@ -66,8 +66,9 @@ This command:
 2. Disables COPR repositories that are no longer configured
 3. Installs all packages listed in `inventory.toml`
 4. Creates symlinks for all configured dotfiles
-5. Creates backups of existing files before replacing them
-6. Updates the last switch timestamp
+5. Applies environment variables to `~/.config/environment.d/20-curator.conf` and imports them into the user session
+6. Creates backups of existing files before replacing them
+7. Updates the last switch timestamp
 
 ### `status`
 Show current configuration status and information.
@@ -117,6 +118,15 @@ Remove the rollback snapshot (`inventory.toml.rollback`).
 curator reset
 ```
 
+### `env`
+Apply environment variables defined in `[variables]` and propagate them to systemd/DBus. For your current shell, run:
+
+```bash
+curator env
+# then, to update this shell:
+eval "$(curator env --eval)"
+```
+
 ## Configuration
 
 ### inventory.toml
@@ -156,6 +166,10 @@ last_switch = ""
 # nixpkgs#git   # or just "git" (curator will prefix nixpkgs#)
 # nixpkgs#htop  # or just "htop"
 
+[variables]
+# ENV_VAR = "value"
+# ANOTHER = "another value"
+
 [dotfiles]
 # Dotfiles to manage with symlinks
 # Format: "target_path" = "source_path"
@@ -217,6 +231,21 @@ List of rpm-ostree layered packages. **One package per line**—presence means i
 #### `[nix]`
 List of nix packages. **One package per line**—presence means install. You can specify plain names (e.g., `neovim`) or `nixpkgs#name`; curator will prefix `nixpkgs#` for installs and use the base name for removals.
 
+#### `[variables]`
+User environment variables to set via systemd `environment.d`. curator writes them to `~/.config/environment.d/20-curator.conf` during `curator switch`; new sessions will load them automatically.
+
+**Examples:**
+```toml
+[variables]
+EDITOR = "nvim"
+PAGER = "less -R"
+```
+
+Notes:
+- Values are imported into the user systemd and DBus environments during `curator switch` or `curator env`.
+- To update a currently running shell, run `eval "$(curator env --eval)"` after applying.
+- Later shell init files (e.g., `.bashrc`, `.zshrc`) can still override these values.
+
 #### `[dotfiles]`
 Dotfile mappings using symlinks:
 - **Key**: Target path where symlink should be created (relative to home directory)
@@ -244,4 +273,4 @@ Additional configuration options:
 
 ## Environment Variables
 
-- `CURATOR_DIR`: Override the default configuration directory (default: `~/.config/curator`)
+- `CURATOR_DIR`: Override the default configuration directory (default: `~/.config/curator`)