diff --git a/.gitignore b/.gitignore
index a554be1..f22337a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,7 +27,7 @@ wheels/
 .venv/
 venv/
 .doc/
-.codex/skills/
+.agents/skills/
 
 # Pytest
 .pytest_cache/
diff --git a/README.md b/README.md
index e8ff927..8916ebf 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,7 @@ Options:
   --output, -o       Base output directory for skill structure (overrides target default)
   --skill-output     Output directory for .skill file (default: .)
   --temp-dir         Temporary directory for processing (default: build)
+  --max-concurrency  Maximum number of HTTP requests to run at once (default: 10)
   --skip-fetch       Skip the download step (use existing files in temp dir)
   --clean            Clean up temporary directory after completion
   --version          Print version (Rust beta only)
diff --git a/src/main.rs b/src/main.rs
index 1eeca7f..967c3c7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,6 @@
 use clap::{Parser, ValueEnum};
 use chrono::Utc;
+use std::num::NonZeroUsize;
 use std::path::PathBuf;
 use tokio::fs;
 use tracing::{error, info, warn, Level};
@@ -27,7 +28,7 @@ impl TargetAgent {
             TargetAgent::Claude | TargetAgent::ClaudeDesktop => ".claude/skills",
             TargetAgent::Cursor => ".cursor/skills",
             TargetAgent::Gemini => ".gemini/skills",
-            TargetAgent::Codex => ".codex/skills",
+            TargetAgent::Codex => ".agents/skills",
         }
     }
 }
@@ -59,6 +60,10 @@ struct Args {
     #[arg(long, default_value = "build")]
     temp_dir: PathBuf,
 
+    /// Maximum number of HTTP requests to run at once
+    #[arg(long, default_value = "10")]
+    max_concurrency: NonZeroUsize,
+
     /// Skip the download step (use existing files in temp dir)
     #[arg(long)]
     skip_fetch: bool,
@@ -110,7 +115,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             include_paths: vec![],
             exclude_query_keys: ["hl", "lang", "locale"].iter().map(|s| s.to_string()).collect(),
             delay_ms: 1000,
-            max_concurrency: 10,
+            max_concurrency: args.max_concurrency.get(),
             user_agent: "site2skill/0.2 (+https://github.com/laiso/site2skill)".to_string(),
         };