diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 80e3328..1380e64 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      
+
       - name: Extract version (Unix/Win)
         id: ver
         shell: bash
@@ -37,7 +37,7 @@ jobs:
           VERSION=$(grep '^version' Cargo.toml | head -n1 | cut -d '"' -f2)
           echo "VERSION=$VERSION" >> "$GITHUB_ENV"
           echo "version=$VERSION" >> "$GITHUB_OUTPUT"
-      
+
       - name: Cache cargo / target
         uses: actions/cache@v4
         with:
@@ -46,13 +46,20 @@ jobs:
             ~/.cargo/git
             target
           key: ${{ runner.os }}-cargo-${{ matrix.target }}-${{ hashFiles('**/Cargo.lock') }}
-      
+
       - name: Install Rust target
         run: rustup target add ${{ matrix.target }}
-      
-      - name: Build
-        run: cargo build --release --target ${{ matrix.target }}
-      
+
+      - name: Build (with icon embedding on Windows)
+        shell: bash
+        run: |
+          if [[ "${{ matrix.os }}" == "windows-latest" ]]; then
+            rustup default stable-x86_64-pc-windows-msvc
+            cargo build --release --target ${{ matrix.target }}
+          else
+            cargo build --release --target ${{ matrix.target }}
+          fi
+
       - name: Package
         shell: bash
         run: |
@@ -69,7 +76,7 @@ jobs:
             tar -czf librius-${VERSION}-${{ matrix.target }}.tar.gz librius-${{ matrix.target }}
             cp librius-${VERSION}-${{ matrix.target }}.tar.gz $GITHUB_WORKSPACE/release_artifacts/${{ matrix.target }}/
           fi
-      
+
       - name: Upload artifact (lnx/win)
         uses: actions/upload-artifact@v4
         with:
@@ -84,7 +91,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      
+
       - name: Extract version
         id: ver
         shell: bash
@@ -92,7 +99,7 @@ jobs:
           VERSION=$(grep '^version' Cargo.toml | head -n1 | cut -d '"' -f2)
           echo "VERSION=$VERSION" >> "$GITHUB_ENV"
           echo "version=$VERSION" >> "$GITHUB_OUTPUT"
-      
+
       - name: Cache cargo / target
         uses: actions/cache@v4
         with:
@@ -101,15 +108,15 @@ jobs:
             ~/.cargo/git
             target
           key: macos-cargo-dual-${{ hashFiles('**/Cargo.lock') }}
-      
+
       - name: Install Rust targets (x86_64 + aarch64)
         run: |
           rustup target add x86_64-apple-darwin
           rustup target add aarch64-apple-darwin
-      
+
       - name: Build x86_64
         run: cargo build --release --target x86_64-apple-darwin
-      
+
       - name: Package x86_64
         shell: bash
         run: |
@@ -120,10 +127,10 @@ jobs:
           cp $GITHUB_WORKSPACE/{README.md,LICENSE,CHANGELOG.md} librius-x86_64-apple-darwin/
           tar -czf librius-${VERSION}-x86_64-apple-darwin.tar.gz librius-x86_64-apple-darwin
           cp librius-${VERSION}-x86_64-apple-darwin.tar.gz $GITHUB_WORKSPACE/release_artifacts/x86_64-apple-darwin/
-      
+
       - name: Build aarch64
         run: cargo build --release --target aarch64-apple-darwin
-      
+
       - name: Package aarch64
         shell: bash
         run: |
@@ -134,7 +141,7 @@ jobs:
           cp $GITHUB_WORKSPACE/{README.md,LICENSE,CHANGELOG.md} librius-aarch64-apple-darwin/
           tar -czf librius-${VERSION}-aarch64-apple-darwin.tar.gz librius-aarch64-apple-darwin
           cp librius-${VERSION}-aarch64-apple-darwin.tar.gz $GITHUB_WORKSPACE/release_artifacts/aarch64-apple-darwin/
-      
+
       - name: Upload artifacts (macOS)
         uses: actions/upload-artifact@v4
         with:
@@ -154,13 +161,13 @@ jobs:
           pattern: release_artifacts-*
           path: temp_download
           merge-multiple: true
-      
+
       - name: Combine into single folder
         shell: bash
         run: |
           mkdir -p release_artifacts
           find temp_download -type f -exec cp {} release_artifacts/ \;
-      
+
       - name: Upload consolidated
         uses: actions/upload-artifact@v4
         with:
@@ -174,20 +181,20 @@ jobs:
     steps:
       - name: Checkout (for Cargo.toml/CHANGELOG)
         uses: actions/checkout@v4
-      
+
       - name: Download consolidated
         uses: actions/download-artifact@v4
         with:
           name: release_artifacts
           path: release_artifacts
-      
+
       - name: Extract version
         id: extract_version
         run: |
           VERSION=$(grep '^version' Cargo.toml | head -n1 | cut -d '"' -f2)
           echo "version=$VERSION" >> $GITHUB_OUTPUT
           echo "VERSION=$VERSION" >> $GITHUB_ENV
-      
+
       - name: Generate SHA256 for all files
         shell: bash
         run: |
@@ -197,7 +204,7 @@ jobs:
             [[ -f "$f" ]] || continue
             sha256sum "$f" > "$f.sha256" || shasum -a 256 "$f" > "$f.sha256"
           done
-      
+
       - name: Import GPG key
         shell: bash
         run: |
@@ -207,7 +214,7 @@ jobs:
           echo "$GPG_PRIVATE_KEY" | base64 --decode | gpg --batch --import
         env:
           GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
-      
+
       - name: Sign all artifacts (detach .sig)
         shell: bash
         run: |
@@ -220,7 +227,7 @@ jobs:
           done
         env:
           GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
-      
+
       - name: Create GitHub Release
         uses: softprops/action-gh-release@v2
         with:
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..ea567e2
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,39 @@
+# ================================================================
+# Git Submodules configuration for Librius
+# ================================================================
+# This file defines the external Git repositories ("submodules")
+# that are linked inside this project.
+#
+# Submodules are used to include external or private components
+# (e.g. developer scripts, shared configs, documentation assets)
+# without merging their contents directly into the main repo.
+# ================================================================
+
+# ------------------------------------------------
+# Private developer utilities (not public)
+# ------------------------------------------------
+# Path:       tools_private/
+# Repository: github.com/umpire274/librius-dev-scripts.git
+# Access:     private (owner/collaborators only)
+# ------------------------------------------------
+[submodule "tools_private"]
+	path = tools_private
+	url = git@github.com:umpire274/rust_dev_scripts.git
+
+# ================================================================
+# Tips:
+#   - Clone with submodules:
+#         git clone --recurse-submodules git@github.com:umpire274/librius.git
+#
+#   - If you already cloned:
+#         git submodule update --init --recursive
+#
+#   - Update the submodule (inside main repo):
+#         cd tools_private && git pull origin main && cd ..
+#         git add tools_private
+#         git commit -m "Update private scripts submodule"
+#
+#   - If you move the submodule folder:
+#         git mv old_path new_path
+#         and update the 'path' entry here accordingly.
+# ================================================================
diff --git a/Cargo.lock b/Cargo.lock
index 3e19e86..ccb410e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1156,7 +1156,7 @@ dependencies = [
 
 [[package]]
 name = "librius"
-version = "0.4.0"
+version = "0.4.1"
 dependencies = [
  "chrono",
  "clap",
@@ -1174,6 +1174,7 @@ dependencies = [
  "tabled",
  "tar",
  "umya-spreadsheet",
+ "winresource",
  "zip 6.0.0",
 ]
 
@@ -1788,6 +1789,15 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "serde_spanned"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf41e0cfaf7226dca15e8197172c295a782857fcb97fad1808a166870dee75a3"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "serde_urlencoded"
 version = "0.7.1"
@@ -2124,6 +2134,47 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "toml"
+version = "0.8.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc1beb996b9d83529a9e75c17a1686767d148d70663143c7854d8b4a09ced362"
+dependencies = [
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_edit",
+]
+
+[[package]]
+name = "toml_datetime"
+version = "0.6.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22cddaf88f4fbc13c51aebbf5f8eceb5c7c5a9da2ac40a13519eb5b0a0e8f11c"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "toml_edit"
+version = "0.22.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41fe8c660ae4257887cf66394862d21dbca4a6ddd26f04a3560410406a2f819a"
+dependencies = [
+ "indexmap 2.11.4",
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_write",
+ "winnow",
+]
+
+[[package]]
+name = "toml_write"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d99f8c9a7727884afe522e9bd5edbfc91a3312b36a77b5fb8926e4c31a41801"
+
 [[package]]
 name = "tower"
 version = "0.5.2"
@@ -2670,6 +2721,25 @@ version = "0.53.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d6bbff5f0aada427a1e5a6da5f1f98158182f26556f345ac9e04d36d0ebed650"
 
+[[package]]
+name = "winnow"
+version = "0.7.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "21a0236b59786fed61e2a80582dd500fe61f18b5dca67a4a067d0bc9039339cf"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "winresource"
+version = "0.1.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edcacf11b6f48dd21b9ba002f991bdd5de29b2da8cc2800412f4b80f677e4957"
+dependencies = [
+ "toml",
+ "version_check",
+]
+
 [[package]]
 name = "wit-bindgen"
 version = "0.46.0"
diff --git a/Cargo.toml b/Cargo.toml
index 8c3c59c..2aef2a1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "librius"
-version = "0.4.0"
+version = "0.4.1"
 edition = "2024"
 authors = ["Alessandro Maestri <umpire274@gmail.com>"]
 description = "A personal library manager CLI written in Rust."
@@ -52,5 +52,8 @@ zip = "6.0.0"
 flate2 = "1.1.4"
 tar = "0.4.44"
 
+[build-dependencies]
+winresource = "0.1.23"
+
 [profile.release]
 opt-level = 3
diff --git a/build.rs b/build.rs
index f816630..8417ae0 100644
--- a/build.rs
+++ b/build.rs
@@ -1,43 +1,18 @@
-#[cfg(windows)]
-use std::path::Path;
-#[cfg(windows)]
-use std::process::Command;
-
+#[cfg(target_os = "windows")]
 fn main() {
-    #[cfg(windows)]
-    {
-        let rc_path = Path::new("res/librius.rc");
-
-        // Rebuild only if the .rc file changes
-        println!("cargo:rerun-if-changed=res/librius.rc");
-
-        if rc_path.exists() {
-            // Compile the .rc file into a .res file using windres
-            // For MSVC toolchains, ensure MinGW is available in PATH
-            let result = Command::new("windres")
-                .env("PATH", "X:\\mingw64\\bin") // Adjust path if MinGW is installed elsewhere
-                .args(["res/librius.rc", "-O", "coff", "-o", "res/librius.res"])
-                .status();
+    use winresource::WindowsResource;
 
-            match result {
-                Ok(status) if status.success() => {
-                    // Link the compiled resource file into the final executable
-                    println!("cargo:rustc-link-arg=res/librius.res");
-                }
-                Ok(status) => {
-                    println!(
-                        "cargo:warning=windres exited with non-zero status: {:?}",
-                        status.code()
-                    );
-                }
-                Err(_) => {
-                    println!("cargo:warning=windres not found or failed to execute.");
-                }
-            }
-        } else {
-            println!("cargo:warning=res/librius.rc not found, skipping icon embedding.");
-        }
-    }
-
-    // Non-Windows platforms: no resource embedding required.
+    // Assicurati che res/librius.ico esista
+    let mut res = WindowsResource::new();
+    res.set_icon("res/librius.ico")
+        .set("FileDescription", "Librius CLI")
+        .set("ProductName", "Librius")
+        .set("OriginalFilename", "librius.exe")
+        .set("FileVersion", env!("CARGO_PKG_VERSION"))
+        .set("ProductVersion", env!("CARGO_PKG_VERSION"))
+        .compile()
+        .expect("Failed to embed icon resource");
 }
+
+#[cfg(not(target_os = "windows"))]
+fn main() {}
diff --git a/src/cli.rs b/src/cli.rs
index e04ee5d..5cac9b9 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -272,6 +272,28 @@ pub fn build_cli() -> Command {
                     cmd
                 }),
         )
+        .subcommand(
+            Command::new("del")
+                .about(tr("help.del.about"))
+                .display_order(90)
+                .arg(
+                    Arg::new("key")
+                        .help(tr("help.del.key")) // e.g. "Book ID or ISBN to delete"
+                        .required(true)
+                        .value_name("ID|ISBN")
+                        .num_args(1)
+                        .display_order(91),
+                )
+                .arg(
+                    Arg::new("force")
+                        .long("force")
+                        .short('f')
+                        .help(tr("help.del.force")) // e.g. "Force deletion without confirmation"
+                        .action(ArgAction::SetTrue)
+                        .num_args(0)
+                        .display_order(92),
+                ),
+        )
         .subcommand(
             Command::new("help")
                 .about(tr_s("help_flag_about"))
@@ -320,6 +342,12 @@ pub fn run_cli(
             handle_edit_book(conn, book_m)?; // ✅ integrazione comando edit book
         }
         Ok(())
+    } else if let Some(("del", sub_m)) = matches.subcommand() {
+        if let Some(key) = sub_m.get_one::<String>("key") {
+            let force = sub_m.get_flag("force");
+            crate::commands::handle_del_book(conn, key, force)?;
+        }
+        Ok(())
     } else if let Some(("backup", sub_m)) = matches.subcommand() {
         let compress = sub_m.get_flag("compress");
         crate::commands::handle_backup(conn, compress)?;
diff --git a/src/commands/del_book.rs b/src/commands/del_book.rs
new file mode 100644
index 0000000..8f079f7
--- /dev/null
+++ b/src/commands/del_book.rs
@@ -0,0 +1,75 @@
+use crate::{print_err, print_info, print_ok, print_warn, tr_with, write_log};
+use colored::*;
+use rusqlite::Connection;
+use std::io::{self, Write};
+
+pub fn handle_del_book(conn: &Connection, key: &str, force: bool) -> rusqlite::Result<()> {
+    println!();
+
+    // 1️⃣ Determina se è ISBN o ID
+    let is_isbn = key.len() >= 10 && !key.chars().all(|c| c.is_ascii_digit());
+
+    // 2️⃣ Controlla se il libro esiste
+    let exists_query = if is_isbn {
+        "SELECT COUNT(*) FROM books WHERE isbn = ?1"
+    } else {
+        "SELECT COUNT(*) FROM books WHERE id = ?1"
+    };
+
+    let exists: i64 = conn.query_row(exists_query, [key], |row| row.get(0))?;
+
+    if exists == 0 {
+        print_warn(&tr_with("del.book.not_found", &[("key", key)]).yellow());
+        return Ok(());
+    }
+
+    // 3️⃣ Conferma interattiva (solo se il libro esiste), se non forzato
+    if !force {
+        print!(
+            "{} ",
+            tr_with("del.book.confirm", &[("key", key)]) // es. "Are you sure you want to delete book {key}? [y/N]:"
+        );
+        io::stdout().flush().unwrap();
+
+        let mut answer = String::new();
+        io::stdin().read_line(&mut answer).unwrap();
+
+        if !matches!(answer.trim().to_lowercase().as_str(), "y" | "yes") {
+            print_info(&tr_with("del.book.cancelled", &[("key", key)]).cyan(), true);
+            return Ok(());
+        }
+
+        println!();
+    }
+
+    // 4️⃣ Esegue la DELETE solo dopo conferma
+    let delete_sql = if is_isbn {
+        "DELETE FROM books WHERE isbn = ?1"
+    } else {
+        "DELETE FROM books WHERE id = ?1"
+    };
+
+    let affected = conn.execute(delete_sql, [key])?;
+
+    if affected > 0 {
+        // Log the action
+        let action_type = if force { "forced" } else { "confirmed" };
+        let log_msg = format!("Book {} deleted ({})", key, action_type);
+        if let Err(e) = write_log(conn, "DELETE_BOOK", "", &log_msg) {
+            print_err(
+                &tr_with(
+                    "log.record.unable_to_write",
+                    &[("log_error", &e.to_string())],
+                )
+                .red()
+                .bold(),
+            );
+        }
+
+        print_ok(&tr_with("del.book.success", &[("key", key)]).green(), true);
+    } else {
+        print_err(&tr_with("del.book.not_found", &[("key", key)]).red().bold());
+    }
+
+    Ok(())
+}
diff --git a/src/commands/mod.rs b/src/commands/mod.rs
index 7a3aefc..77684e0 100644
--- a/src/commands/mod.rs
+++ b/src/commands/mod.rs
@@ -8,6 +8,7 @@ pub mod add;
 pub mod add_book;
 pub mod backup;
 pub mod config;
+pub mod del_book;
 pub mod edit_book;
 pub mod export;
 pub mod import;
@@ -17,6 +18,7 @@ pub use add::handle_add;
 pub use add_book::handle_add_book;
 pub use backup::handle_backup;
 pub use config::handle_config;
+pub use del_book::handle_del_book;
 pub use edit_book::handle_edit_book;
 pub use export::handle_export_csv;
 pub use export::handle_export_json;
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index 2d7079c..f25ff33 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -160,5 +160,13 @@
   "edit.book.not_found": "No matching book found.",
   "edit.book.error_updating": "Error updating book: {error}",
   "edit.book.error_invalid_id": "Invalid ID format.",
-  "edit.book.error_no_field": "No fields specified to update."
+  "edit.book.error_no_field": "No fields specified to update.",
+  "help.del.about": "Delete a book by its ID or ISBN.",
+  "help.del.key": "Specify the book ID or ISBN to delete.",
+  "del.book.success": "Book {key} deleted successfully.",
+  "del.book.not_found": "No matching book found for ID|ISBN {key}.",
+  "del.book.confirm": "Are you sure you want to delete book {key}? [y/N]:",
+  "del.book.cancelled": "Deletion of book {key} cancelled.",
+  "help.del.force": "Delete without asking for confirmation.",
+  "log.record.unable_to_write": "Unable to record log entry: {log_error}",
 }
diff --git a/src/i18n/locales/it.json b/src/i18n/locales/it.json
index 14da2f1..083b462 100644
--- a/src/i18n/locales/it.json
+++ b/src/i18n/locales/it.json
@@ -160,5 +160,13 @@
   "edit.book.not_found": "Nessun libro corrispondente trovato.",
   "edit.book.error_updating": "Errore durante l'aggiornamento del libro: {error}",
   "edit.book.error_invalid_id": "Formato ID non valido.",
-  "edit.book.error_no_field": "Nessun campo specificato da aggiornare."
+  "edit.book.error_no_field": "Nessun campo specificato da aggiornare.",
+  "help.del.about": "Elimina un libro tramite ID o ISBN.",
+  "help.del.key": "Specifica l'ID o l'ISBN del libro da eliminare.",
+  "del.book.success": "Libro {key} eliminato correttamente.",
+  "del.book.not_found": "Nessun libro trovato per ID|ISBN {key}.",
+  "del.book.confirm": "Sei sicuro di voler eliminare il libro {key}? [y/N]:",
+  "del.book.cancelled": "Eliminazione del libro {key} annullata.",
+  "help.del.force": "Elimina senza chiedere conferma.",
+  "log.record.unable_to_write": "Impossibile scrivere il log: {log_error}"
 }
diff --git a/tools/check_submodule.ps1 b/tools/check_submodule.ps1
new file mode 100644
index 0000000..c5eb90c
--- /dev/null
+++ b/tools/check_submodule.ps1
@@ -0,0 +1,45 @@
+# ============================================================
+#  Librius - Submodule Check Script (PowerShell)
+# ============================================================
+# Verifica lo stato del submodule tools_private
+# e controlla se è sincronizzato con l'ultimo commit remoto.
+# ============================================================
+
+$submodulePath = "tools_private"
+$remoteUrl = "git@github.com:umpire274/rust_dev_scripts.git"
+$branch = "main"
+
+Write-Host "🔍 Checking submodule status for '$submodulePath'..." -ForegroundColor Cyan
+
+if (-not (Test-Path "$submodulePath/.git"))
+{
+    Write-Host "❌ Submodule not initialized. Run:" -ForegroundColor Red
+    Write-Host "   git submodule update --init --recursive"
+    exit 1
+}
+
+Set-Location $submodulePath
+
+# Get local HEAD commit
+$localCommit = git rev-parse HEAD
+# Fetch latest remote
+git fetch origin $branch --quiet
+$remoteCommit = git rev-parse origin/$branch
+
+Set-Location ..
+
+if ($localCommit -eq $remoteCommit)
+{
+    Write-Host "✅ Submodule '$submodulePath' is up to date with origin/$branch." -ForegroundColor Green
+    exit 0
+}
+else
+{
+    Write-Host "⚠️  Submodule '$submodulePath' is out of sync!" -ForegroundColor Yellow
+    Write-Host "   Local : $localCommit"
+    Write-Host "   Remote: $remoteCommit"
+    Write-Host ""
+    Write-Host "👉 To update, run:" -ForegroundColor Cyan
+    Write-Host "   cd $submodulePath; git pull origin $branch; cd .."
+    exit 2
+}
diff --git a/tools/check_submodule.sh b/tools/check_submodule.sh
new file mode 100644
index 0000000..96d73f5
--- /dev/null
+++ b/tools/check_submodule.sh
@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+# ============================================================
+#  Librius - Submodule Check Script (Bash)
+# ============================================================
+# Verifica lo stato del submodule tools_private
+# e controlla se è aggiornato al branch remoto.
+# ============================================================
+
+set -e
+
+SUBMODULE_PATH="tools_private"
+REMOTE_URL="git@github.com:umpire274/rust_dev_scripts.git"
+BRANCH="main"
+
+echo "🔍 Checking submodule status for '$SUBMODULE_PATH'..."
+
+if [ ! -d "$SUBMODULE_PATH/.git" ]; then
+    echo "❌ Submodule not initialized."
+    echo "   Run: git submodule update --init --recursive"
+    exit 1
+fi
+
+cd "$SUBMODULE_PATH"
+
+LOCAL_COMMIT=$(git rev-parse HEAD)
+git fetch origin "$BRANCH" --quiet
+REMOTE_COMMIT=$(git rev-parse origin/"$BRANCH")
+
+cd ..
+
+if [ "$LOCAL_COMMIT" = "$REMOTE_COMMIT" ]; then
+    echo "✅ Submodule '$SUBMODULE_PATH' is up to date with origin/$BRANCH."
+    exit 0
+else
+    echo "⚠️  Submodule '$SUBMODULE_PATH' is out of sync!"
+    echo "   Local : $LOCAL_COMMIT"
+    echo "   Remote: $REMOTE_COMMIT"
+    echo ""
+    echo "👉 To update, run:"
+    echo "   cd $SUBMODULE_PATH && git pull origin $BRANCH && cd .."
+    exit 2
+fi
diff --git a/tools_private b/tools_private
new file mode 160000
index 0000000..e388cb0
--- /dev/null
+++ b/tools_private
@@ -0,0 +1 @@
+Subproject commit e388cb058f9baac622e2255433ee7984eea734d8