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, 41 insertions, 0 deletions

diff --git a/src/detect/agents/amp.rs b/src/detect/agents/amp.rs
new file mode 100644
index 00000000..ad76ca27
--- /dev/null
+++ b/src/detect/agents/amp.rs
@@ -0,0 +1,41 @@
+use super::super::AgentState;
+
+/// Amp (Sourcegraph) detection.
+///
+/// Blocked approval prompts use a shared footer with options like
+/// "Approve", "Allow All for This Session", "Allow All for Every Session",
+/// "Allow File for Every Session", and "Deny with feedback". The header varies
+/// by approval type, for example "Invoke tool ...?", "Run this command?",
+/// "Allow editing file:", or "Allow creating file:".
+///
+/// Working layout:
+/// ```text
+///   ✓ Search Map the core runtime architecture...
+///   ⋯ Oracle ▼
+///   ≈ Running tools...         Esc to cancel
+/// ```
+pub(super) fn detect(content: &str) -> AgentState {
+    let lower = content.to_lowercase();
+
+    let has_waiting_for_approval = lower.contains("waiting for approval");
+    let has_approval_header = lower.contains("invoke tool")
+        || lower.contains("run this command?")
+        || lower.contains("allow editing file:")
+        || lower.contains("allow creating file:")
+        || lower.contains("confirm tool call");
+    let has_approval_actions = lower.contains("approve")
+        && (lower.contains("allow all for this session")
+            || lower.contains("allow all for every session")
+            || lower.contains("allow file for every session")
+            || lower.contains("deny with feedback"));
+
+    if has_approval_actions && (has_waiting_for_approval || has_approval_header) {
+        return AgentState::Blocked;
+    }
+
+    if lower.contains("esc to cancel") {
+        return AgentState::Working;
+    }
+
+    AgentState::Idle
+}