add validate command, remove Python dependency from CI

crates/plano-cli/src/commands/mod.rs

@@ -5,6 +5,7 @@ pub mod init;
 pub mod logs;
 pub mod self_update;
 pub mod up;
+pub mod validate;
 
 use clap::{Parser, Subcommand};
 
@@ -134,6 +135,16 @@ pub enum Command {
         list_templates: bool,
     },
 
+    /// Validate a Plano configuration file
+    Validate {
+        /// Config file path
+        file: Option<String>,
+
+        /// Path to the directory containing config.yaml
+        #[arg(long, default_value = ".")]
+        path: String,
+    },
+
     /// Update planoai to the latest version
     #[command(name = "self-update")]
     SelfUpdate {
@@ -261,6 +272,7 @@ pub async fn run(cli: Cli) -> anyhow::Result<()> {
             force,
             list_templates,
         }) => init::run(template, clean, output, force, list_templates).await,
+        Some(Command::Validate { file, path }) => validate::run(file, &path).await,
         Some(Command::SelfUpdate { version }) => self_update::run(version.as_deref()).await,
     }
 }

crates/plano-cli/src/commands/validate.rs

@@ -0,0 +1,31 @@
+use anyhow::Result;
+
+use crate::native::runner::validate_config;
+use crate::utils::find_config_file;
+
+pub async fn run(file: Option<String>, path: &str) -> Result<()> {
+    let green = console::Style::new().green();
+    let red = console::Style::new().red();
+
+    let config_path = find_config_file(path, file.as_deref());
+    if !config_path.exists() {
+        eprintln!(
+            "{} Config file not found: {}",
+            red.apply_to("✗"),
+            config_path.display()
+        );
+        std::process::exit(1);
+    }
+
+    match validate_config(&config_path) {
+        Ok(()) => {
+            eprintln!("{} Configuration valid", green.apply_to("✓"));
+            Ok(())
+        }
+        Err(e) => {
+            eprintln!("{} Validation failed", red.apply_to("✗"));
+            eprintln!("  {e:#}");
+            std::process::exit(1);
+        }
+    }
+}