🔧 Require explicit --log flag or verbose env var for stdout logging

Change logging initialization to write to files by default without
spamming stdout. Both --log CLI flag and GIT_IRIS_VERBOSE enable
stdout output explicitly, while file logging remains enabled by
default.

This keeps normal command output clean while providing multiple ways
to enable debug output when needed.

Author: hyperb1iss

src/cli.rs

@@ -409,6 +409,7 @@ pub async fn main() -> anyhow::Result<()> {
 
     if cli.log {
         crate::logger::enable_logging();
+        crate::logger::set_log_to_stdout(true);
         let log_file = cli.log_file.as_deref().unwrap_or(LOG_FILE);
         crate::logger::set_log_file(log_file)?;
         log_debug!("Debug logging enabled");

src/logger.rs

@@ -143,16 +143,21 @@ pub fn init() -> Result<(), Box<dyn std::error::Error>> {
 
         if verbose_from_env {
             set_verbose_logging(true);
+            set_log_to_stdout(true);
         }
 
-        // Enable logging by default
+        // Enable logging to file only by default (stdout requires explicit --log flag)
         enable_logging();
-        set_log_to_stdout(true);
 
         // Set up tracing subscriber with unified writer (for Rig logs)
+        // Default: only warnings/errors. Debug requires RUST_LOG or --log flag
         let env_filter = EnvFilter::try_from_default_env().unwrap_or_else(|_| {
-            // Default filter: show git_iris and iris debug, rig info, and warnings from others
-            "git_iris=debug,iris=debug,rig=info,warn".into()
+            if verbose_from_env {
+                "git_iris=debug,iris=debug,rig=info,warn".into()
+            } else {
+                // Silent by default - no debug spam
+                "warn".into()
+            }
         });
 
         let fmt_layer = fmt::Layer::new()