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, 26 insertions, 0 deletions

diff --git a/src/detect/agents/hermes.rs b/src/detect/agents/hermes.rs
new file mode 100644
index 00000000..d6c4c97e
--- /dev/null
+++ b/src/detect/agents/hermes.rs
@@ -0,0 +1,26 @@
+use super::super::AgentState;
+
+/// Hermes Agent detection.
+///
+/// Hermes shows a bottom status bar while turns are active and modal approval
+/// dialogs for dangerous terminal commands. Prefer the modal controls for
+/// blocked detection, then the live interrupt/status controls for working.
+pub(super) fn detect(content: &str) -> AgentState {
+    let lower = content.to_lowercase();
+
+    let has_approval_options = lower.contains("allow once")
+        && lower.contains("allow for this session")
+        && lower.contains("deny");
+    let has_approval_controls = lower.contains("enter to confirm")
+        || lower.contains("↑/↓ to select")
+        || lower.contains("show full command");
+    if (lower.contains("dangerous command") || has_approval_options) && has_approval_controls {
+        return AgentState::Blocked;
+    }
+
+    if lower.contains("msg=interrupt") || lower.contains("ctrl+c cancel") {
+        return AgentState::Working;
+    }
+
+    AgentState::Idle
+}