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, 28 insertions, 0 deletions

diff --git a/src/detect/agents/gemini.rs b/src/detect/agents/gemini.rs
new file mode 100644
index 00000000..c47355c0
--- /dev/null
+++ b/src/detect/agents/gemini.rs
@@ -0,0 +1,28 @@
+use super::super::{has_confirmation_prompt, AgentState};
+
+pub(super) fn detect(content: &str) -> AgentState {
+    let lower = content.to_lowercase();
+
+    // Blocked — explicit confirmation
+    if lower.contains("waiting for user confirmation") {
+        return AgentState::Blocked;
+    }
+
+    // Blocked — box-drawing confirmation prompts
+    if content.contains("│ Apply this change")
+        || content.contains("│ Allow execution")
+        || content.contains("│ Do you want to proceed")
+    {
+        return AgentState::Blocked;
+    }
+    if has_confirmation_prompt(&lower) {
+        return AgentState::Blocked;
+    }
+
+    // Working
+    if lower.contains("esc to cancel") {
+        return AgentState::Working;
+    }
+
+    AgentState::Idle
+}