diff --git a/src/detect/manifest/tests.rs b/src/detect/manifest/tests.rs
index 265dfa69..82ce52d9 100644
--- a/src/detect/manifest/tests.rs
+++ b/src/detect/manifest/tests.rs
@@ -625,6 +625,21 @@ fn claude_osc_title_braille_prefix_is_working() {
     assert!(result.visible_working);
 }
 
+#[test]
+fn claude_osc_title_half_circle_frames_are_working() {
+    for frame in ['◐', '◓', '◑', '◒'] {
+        let title = format!("{frame} Initial conversation with Claude");
+        let result = osc_explain(Agent::Claude, "", &title, "");
+        assert_eq!(result.state, AgentState::Working, "frame {frame}");
+        assert_eq!(
+            result.matched_rule.as_ref().map(|rule| rule.id.as_str()),
+            Some("osc_title_working"),
+            "frame {frame}"
+        );
+        assert!(result.visible_working, "frame {frame}");
+    }
+}
+
 #[test]
 fn claude_osc_title_static_prefix_is_idle() {
     // "✳" is U+2733, static prefix when Claude is not working
diff --git a/src/detect/manifests/claude.toml b/src/detect/manifests/claude.toml
index 7e9a3163..514fdd04 100644
--- a/src/detect/manifests/claude.toml
+++ b/src/detect/manifests/claude.toml
@@ -1,7 +1,7 @@
 id = "claude"
-version = "2026.08.12.1"
+version = "2026.08.13.1"
 min_engine_version = 2
-updated_at = "2026-08-12T00:00:00Z"
+updated_at = "2026-08-13T00:00:00Z"
 aliases = ["claude-code"]
 
 [[rules]]
@@ -11,7 +11,7 @@ priority = 1100
 region = "osc_title"
 visible_working = true
 # Braille covers <= 2.1.227; half-circles are the 2.1.228 busy spinner.
-regex = ['^[\x{2800}-\x{28FF}\x{25D0}-\x{25D1}] ']
+regex = ['^[\x{2800}-\x{28FF}\x{25D0}-\x{25D3}] ']
 
 [[rules]]
 id = "btw_overlay_working"
diff --git a/website/agent-detection/claude.toml b/website/agent-detection/claude.toml
index 7e9a3163..514fdd04 100644
--- a/website/agent-detection/claude.toml
+++ b/website/agent-detection/claude.toml
@@ -1,7 +1,7 @@
 id = "claude"
-version = "2026.08.12.1"
+version = "2026.08.13.1"
 min_engine_version = 2
-updated_at = "2026-08-12T00:00:00Z"
+updated_at = "2026-08-13T00:00:00Z"
 aliases = ["claude-code"]
 
 [[rules]]
@@ -11,7 +11,7 @@ priority = 1100
 region = "osc_title"
 visible_working = true
 # Braille covers <= 2.1.227; half-circles are the 2.1.228 busy spinner.
-regex = ['^[\x{2800}-\x{28FF}\x{25D0}-\x{25D1}] ']
+regex = ['^[\x{2800}-\x{28FF}\x{25D0}-\x{25D3}] ']
 
 [[rules]]
 id = "btw_overlay_working"