refactor: split agent detection by agent

Move screen detection into per-agent modules and keep visible-state arbitration centralized in terminal state.

Tighten Codex prompt-scoped working detection and Claude hook/screen recovery for stale blocked and idle reports.

Add a focused just recipe for single-test runs.

refs #349

refs #352

1 files changed, 24 insertions, 0 deletions

diff --git a/src/detect/agents/github_copilot.rs b/src/detect/agents/github_copilot.rs
new file mode 100644
index 00000000..eed03011
--- /dev/null
+++ b/src/detect/agents/github_copilot.rs
@@ -0,0 +1,24 @@
+use super::super::AgentState;
+
+pub(super) fn detect(content: &str) -> AgentState {
+    let lower = content.to_lowercase();
+
+    // Blocked
+    if lower.contains("esc to cancel")
+        && (lower.contains("enter to select")
+            || lower.contains("enter to confirm")
+            || lower.contains("enter to submit"))
+    {
+        return AgentState::Blocked;
+    }
+
+    // Working
+    if lower.contains("esc to cancel")
+        || lower.contains("esc cancel")
+        || lower.contains("esc again to cancel")
+    {
+        return AgentState::Working;
+    }
+
+    AgentState::Idle
+}