fix: guard git init parent folders

docs/ABSTRACTIONS.md

@@ -68,6 +68,8 @@ Git is a per-vault capability, not a prerequisite for the document model. A vaul
 
 Plain folders become Git-backed only when the user explicitly runs Git initialization from the setup dialog, status bar, or command palette. Features that depend on Git must check this capability instead of assuming every vault has `.git`.
 
+Git initialization is intentionally scoped to dedicated vault folders. When the current non-git folder looks like a broad personal root such as Documents, Desktop, or Downloads and does not already carry Tolaria-managed vault markers, `init_git_repo` refuses to run Git and asks the user to select or create a dedicated subfolder instead.
+
 ### VaultEntry
 
 The core data type representing a single note, defined in Rust (`src-tauri/src/vault/mod.rs`) and TypeScript (`src/types.ts`).

src-tauri/src/commands/git.rs

@@ -158,10 +158,62 @@ pub fn is_git_repo(vault_path: VaultPathArg) -> bool {
         .is_dir()
 }
 
+#[cfg(desktop)]
+fn validate_git_init_target(vault_path: &str) -> Result<(), String> {
+    let path = std::path::Path::new(vault_path);
+    if !path.exists() {
+        return Err("Choose an existing vault folder before initializing Git".to_string());
+    }
+    if !path.is_dir() {
+        return Err("Choose a folder before initializing Git".to_string());
+    }
+
+    if is_broad_personal_folder(path) && !has_tolaria_vault_marker(path) {
+        return Err(format!(
+            "Choose a dedicated vault folder before initializing Git. '{}' looks like a broad personal folder; create or select a subfolder such as '{}' instead.",
+            path.display(),
+            path.join("Tolaria").display()
+        ));
+    }
+
+    Ok(())
+}
+
+#[cfg(desktop)]
+fn is_broad_personal_folder(path: &std::path::Path) -> bool {
+    let Some(name) = path.file_name().and_then(|name| name.to_str()) else {
+        return false;
+    };
+
+    matches!(
+        name.to_ascii_lowercase().as_str(),
+        "desktop"
+            | "documents"
+            | "downloads"
+            | "movies"
+            | "music"
+            | "pictures"
+            | "public"
+            | "templates"
+            | "videos"
+    )
+}
+
+#[cfg(desktop)]
+fn has_tolaria_vault_marker(path: &std::path::Path) -> bool {
+    ["AGENTS.md", "CLAUDE.md", "type.md", "note.md"]
+        .iter()
+        .any(|file| path.join(file).is_file())
+        || ["attachments", "type", "views"]
+            .iter()
+            .any(|dir| path.join(dir).is_dir())
+}
+
 #[cfg(desktop)]
 #[tauri::command]
 pub fn init_git_repo(vault_path: VaultPathArg) -> Result<(), String> {
     let vault_path = expand_tilde(&vault_path);
+    validate_git_init_target(&vault_path)?;
     crate::git::init_repo(&vault_path)
 }
 
@@ -374,6 +426,33 @@ mod tests {
         );
     }
 
+    #[test]
+    fn init_git_repo_rejects_broad_personal_folders() {
+        let dir = TempDir::new().unwrap();
+        let documents = dir.path().join("Documents");
+        fs::create_dir_all(&documents).unwrap();
+        fs::write(documents.join("unrelated.txt"), "not a vault").unwrap();
+
+        let err = init_git_repo(documents.to_string_lossy().into_owned())
+            .expect_err("expected Documents itself to be rejected before git init");
+
+        assert!(err.contains("dedicated vault folder"));
+        assert!(!documents.join(".git").exists());
+    }
+
+    #[test]
+    fn init_git_repo_allows_named_vault_subfolder_under_documents() {
+        let dir = TempDir::new().unwrap();
+        let vault = dir.path().join("Documents").join("Tolaria");
+        fs::create_dir_all(&vault).unwrap();
+        fs::write(vault.join("note.md"), "# Note\n").unwrap();
+        let vault = vault.to_string_lossy().into_owned();
+
+        init_git_repo(vault.clone()).unwrap();
+
+        assert!(is_git_repo(vault));
+    }
+
     #[tokio::test]
     async fn desktop_remote_commands_report_no_remote() {
         let (_dir, vault) = create_initialized_vault();