sync from monorepo @ 5408ddc3

crates/dirigent_fermata/tests/core_project.rs

@@ -8,7 +8,7 @@ fn finds_botignore_toml_first() {
     let root = tmp.path();
     fs::create_dir_all(root.join("sub/deep")).unwrap();
     fs::write(root.join("botignore.toml"), "").unwrap();
-    fs::write(root.join(".botignore"), "").unwrap();
+    fs::write(root.join(".botignore.toml"), "").unwrap();
     fs::create_dir_all(root.join(".git")).unwrap();
 
     let target = root.join("sub/deep/file.rs");
@@ -19,11 +19,11 @@ fn finds_botignore_toml_first() {
 }
 
 #[test]
-fn falls_back_to_botignore() {
+fn finds_dot_botignore_toml() {
     let tmp = TempDir::new().unwrap();
     let root = tmp.path();
     fs::create_dir_all(root.join("sub")).unwrap();
-    fs::write(root.join(".botignore"), "").unwrap();
+    fs::write(root.join(".botignore.toml"), "").unwrap();
 
     let target = root.join("sub/file.rs");
     fs::write(&target, "").unwrap();
@@ -32,6 +32,57 @@ fn falls_back_to_botignore() {
     assert_eq!(found, root);
 }
 
+#[test]
+fn botignore_alone_does_not_stop_walk() {
+    // A bare .botignore is a policy file, not a project boundary.
+    // The walk should continue past it to find a real root marker.
+    let tmp = TempDir::new().unwrap();
+    let root = tmp.path();
+    fs::create_dir_all(root.join("a/b")).unwrap();
+    fs::create_dir_all(root.join(".git")).unwrap();
+    fs::write(root.join("a/.botignore"), "*.secret").unwrap();
+
+    let target = root.join("a/b/file.rs");
+    fs::write(&target, "").unwrap();
+
+    // Should find root (with .git), NOT root/a (with .botignore)
+    let found = find_project_root(&target).unwrap();
+    assert_eq!(found, root);
+}
+
+#[test]
+fn botignore_used_as_fallback() {
+    // If only .botignore exists (no strong marker), it serves as a fallback
+    // root so that policy is still enforced.
+    let tmp = TempDir::new().unwrap();
+    let root = tmp.path();
+    fs::create_dir_all(root.join("sub")).unwrap();
+    fs::write(root.join(".botignore"), "*.secret").unwrap();
+
+    let target = root.join("sub/file.rs");
+    fs::write(&target, "").unwrap();
+
+    let found = find_project_root(&target).unwrap();
+    assert_eq!(found, root);
+}
+
+#[test]
+fn strong_marker_preferred_over_botignore_fallback() {
+    // .botignore at a/b/, .git at root — walk past .botignore, use root.
+    let tmp = TempDir::new().unwrap();
+    let root = tmp.path();
+    fs::create_dir_all(root.join("a/b/c")).unwrap();
+    fs::create_dir_all(root.join(".git")).unwrap();
+    fs::write(root.join("a/b/.botignore"), "*.key").unwrap();
+
+    let target = root.join("a/b/c/file.rs");
+    fs::write(&target, "").unwrap();
+
+    // Should find root (with .git), not a/b (with .botignore)
+    let found = find_project_root(&target).unwrap();
+    assert_eq!(found, root);
+}
+
 #[test]
 fn falls_back_to_git() {
     let tmp = TempDir::new().unwrap();
@@ -59,7 +110,7 @@ fn walks_up_from_file_path_not_cwd() {
     let tmp = TempDir::new().unwrap();
     let root = tmp.path();
     fs::create_dir_all(root.join("a/b/c")).unwrap();
-    fs::write(root.join("a/.botignore"), "").unwrap();
+    fs::write(root.join("a/botignore.toml"), "").unwrap();
 
     let target = root.join("a/b/c/file.rs");
     fs::write(&target, "").unwrap();