feat: add clx health command with 9 system validators

crates/clx-core/src/policy/llm.rs

@@ -390,7 +390,7 @@ pub(crate) fn validate_prompt_template(content: &str) -> Result<(), String> {
 /// Each file-based prompt must pass `validate_prompt_template()` and
 /// `is_file_safe()` checks. If a file fails validation, we fall through
 /// to the next tier.
-pub(crate) fn load_validator_prompt(cwd: &str, sensitivity: &PromptSensitivity) -> String {
+pub fn load_validator_prompt(cwd: &str, sensitivity: &PromptSensitivity) -> String {
     // 1. Try per-project prompt
     let project_prompt = Path::new(cwd).join(".clx/prompts/validator.txt");
     if let Some(content) = try_load_prompt_file(&project_prompt) {

crates/clx-core/src/policy/mod.rs

@@ -33,7 +33,7 @@ pub use traits::PolicyEvaluator;
 
 pub use cache::{ValidationCache, compute_cache_key};
 pub use file_util::ensure_default_rules_file;
-pub use llm::DEFAULT_VALIDATOR_PROMPT;
+pub use llm::{DEFAULT_VALIDATOR_PROMPT, load_validator_prompt};
 pub use matching::glob_match;
 pub use mcp::{McpExtraction, extract_mcp_command};
 pub use prompts::{PROMPT_HIGH, PROMPT_LOW, PROMPT_STANDARD};