diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 7631b2c..60dff89 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -50,9 +50,10 @@ This is a modular single-binary Rust utility that fetches Antares B2B product da
 
 **Artifacts:**
 - `temp/antares.json` - saved in `temp/` after each successful API fetch; directory created auto if missing
+- **Cleanup**: `temp/` directory is automatically deleted after Excel export (unless `--debug` flag is set)
 - Excel export path is configured via the `OUT` env var; parent directory created auto if missing
 - `log/{YYYY-MM-DD}.log` - daily logs; `log/` directory created auto if missing
-- `.gitignore` excludes: `*.json`, `*.xlsx`, `.env`, `/out`, `/log`
+- `.gitignore` excludes: `*.json`, `*.xlsx`, `.env`, `/out`, `/log`, `/temp`
 
 **Excel export (`src/tools/excel.rs`):**
 - Not a generic dump; maps selected Antares fields to fixed column layout per business rules
@@ -75,3 +76,7 @@ This is a modular single-binary Rust utility that fetches Antares B2B product da
 - Uses `reqwest::blocking::Client` with 600-second timeout (in `src/tools/request.rs`)
 - No async runtime; synchronous flow is intentional
 - Only change to async if architecture overhaul is deliberate
+
+**CLI Arguments:**
+- `--config /path/to/.env` - Load config from custom location (defaults to `.env` in current directory)
+- `--debug` - Enable debug mode: preserves `temp/` directory for inspection, no cleanup after export
diff --git a/src/main.rs b/src/main.rs
index 3590706..1df66bf 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -24,9 +24,14 @@ fn main() -> Result<(), Box<dyn Error>> {
     let logger = Logger::init()?;
     logger.info("Starting Antares data export");
 
-    // Parse CLI arguments for --config flag
+    // Parse CLI arguments for --config and --debug flags
     let args: Vec<String> = std::env::args().collect();
     let config_path = parse_config_arg(&args);
+    let debug_mode = args.contains(&"--debug".to_string());
+
+    if debug_mode {
+        logger.debug("Debug mode enabled - temp files will be preserved");
+    }
 
     let env_config = load_env_config(config_path)
         .map_err(|e| {
@@ -116,6 +121,18 @@ fn main() -> Result<(), Box<dyn Error>> {
         }
     }
 
+    // Clean up temp directory unless in debug mode
+    if !debug_mode {
+        match fs::remove_dir_all(&temp_dir) {
+            Ok(_) => {
+                logger.debug(&format!("Cleaned up temp directory: {:?}", temp_dir));
+            }
+            Err(e) => {
+                logger.warn(&format!("Failed to remove temp directory '{:?}': {}", temp_dir, e));
+            }
+        }
+    }
+
     logger.info("Export process completed successfully");
     Ok(())
 }