cli: make repo argument required

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: aster-void

SPEC.md

@@ -124,14 +124,14 @@ Examples:
 ## CLI Interface
 
 ```
-rollcron [OPTIONS] [REPO]
+rollcron [OPTIONS] <REPO>
 
 Arguments:
-  [REPO]  Path to local repo or remote URL [default: .]
+  <REPO>  Path to local repo or remote URL (required)
 
 Options:
-  -i, --interval <SECONDS>  Pull interval [default: 60]
-  -h, --help               Print help
+  --pull-interval <SECONDS>  Pull interval [default: 3600]
+  -h, --help                 Print help
 ```
 
 ## Error Handling

src/main.rs

@@ -14,7 +14,6 @@ const CONFIG_FILE: &str = "rollcron.yaml";
 #[command(name = "rollcron", about = "Auto-pulling cron scheduler")]
 struct Args {
     /// Path to local repo or remote URL (https://... or git@...)
-    #[arg(default_value = ".")]
     repo: String,
 
     /// Pull interval in seconds