feat(validate): add brief summary after validation (#128)

Author: codcod

plugins/repos-validate/README.md

@@ -82,6 +82,10 @@ Example output:
 
 ```console
 ✅ config.yaml syntax is valid.
+   42 repositories in config
+   15 unique tags: api, backend, cli, deprecated, frontend, gh:automation, gh:cli, gh:rust, java, javascript, microservice, python, rust, typescript, web
+
+Validation finished successfully.
 ```
 
 ### Validate syntax and check repository connectivity
@@ -97,6 +101,8 @@ Example output:
 
 ```console
 ✅ config.yaml syntax is valid.
+   42 repositories in config
+   15 unique tags: api, backend, cli, deprecated, frontend, gh:automation, gh:cli, gh:rust, java, javascript, microservice, python, rust, typescript, web
 
 Validating repository connectivity...
 ✅ codcod/repos: Accessible.
@@ -118,6 +124,8 @@ Example output:
 
 ```console
 ✅ config.yaml syntax is valid.
+   42 repositories in config
+   15 unique tags: api, backend, cli, deprecated, frontend, gh:automation, gh:cli, gh:rust, java, javascript, microservice, python, rust, typescript, web
 
 Validating repository connectivity...
 ✅ codcod/repos: Accessible.
@@ -141,6 +149,8 @@ Example output:
 
 ```console
 ✅ config.yaml syntax is valid.
+   42 repositories in config
+   15 unique tags: api, backend, cli, deprecated, frontend, gh:automation, gh:cli, gh:rust, java, javascript, microservice, python, rust, typescript, web
 
 Validating repository connectivity...
 ✅ codcod/repos: Accessible.

plugins/repos-validate/src/main.rs

@@ -38,6 +38,21 @@ async fn main() -> Result<()> {
     }
 
     println!("{}", "✅ config.yaml syntax is valid.".green());
+
+    // Display summary information
+    println!("   {} repositories in config", repos.len());
+
+    // Collect and display unique tags
+    let unique_tags = get_unique_tags(&repos);
+    if !unique_tags.is_empty() {
+        println!(
+            "   {} unique tags: {}",
+            unique_tags.len(),
+            unique_tags.join(", ")
+        );
+    } else {
+        println!("   No tags defined");
+    }
     println!();
 
     if !args.connect {
@@ -192,6 +207,20 @@ fn parse_github_url(url: &str) -> Result<(String, String)> {
     anyhow::bail!("Unsupported repository URL format: {}", url)
 }
 
+fn get_unique_tags(repos: &[Repository]) -> Vec<String> {
+    let mut tags: HashSet<String> = HashSet::new();
+
+    for repo in repos {
+        for tag in &repo.tags {
+            tags.insert(tag.clone());
+        }
+    }
+
+    let mut sorted_tags: Vec<String> = tags.into_iter().collect();
+    sorted_tags.sort();
+    sorted_tags
+}
+
 fn get_config_path() -> Result<PathBuf> {
     // Try to get config path from environment variable set by repos CLI
     if let Ok(config) = std::env::var("REPOS_CONFIG_FILE") {