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, 22 insertions, 0 deletions

diff --git a/src/detect/agents/cline.rs b/src/detect/agents/cline.rs
new file mode 100644
index 00000000..86b5ce01
--- /dev/null
+++ b/src/detect/agents/cline.rs
@@ -0,0 +1,22 @@
+use super::super::AgentState;
+
+pub(super) fn detect(content: &str) -> AgentState {
+    let lower = content.to_lowercase();
+
+    // Blocked
+    if lower.contains("let cline use this tool") {
+        return AgentState::Blocked;
+    }
+    // [act mode] or [plan mode] followed by "yes"
+    if (lower.contains("[act mode]") || lower.contains("[plan mode]")) && lower.contains("yes") {
+        return AgentState::Blocked;
+    }
+
+    // Idle
+    if lower.contains("cline is ready for your message") {
+        return AgentState::Idle;
+    }
+
+    // Cline defaults to working (unlike most agents that default to idle)
+    AgentState::Working
+}