fix(lib): resolve B-8 send_keys_safe agy verification bypass and add submission retry test

.agents/skills/lib_py/agents/input_region.py

@@ -0,0 +1,40 @@
+# input_region.py — Rule-based input region extraction and normalization (T2 & T3)
+
+import re
+from lib_py.agents.registry import get_adapter
+
+def extract_input_region(pane_text: str, agent_name: str) -> str:
+    """
+    Extracts the input area text between horizontal rule separators (─{10,}) for a given agent.
+    If rules are absent, falls back to full pane_text to support mocks and unruled panes.
+    Strips leading prompt tokens ('>', '❯') and placeholders ('Ask anything...').
+    Raises ValueError for unsupported agents (like hermes with no input area facts).
+    """
+    adapter = get_adapter(agent_name)
+    if not adapter or not adapter.input_prompt:
+        raise ValueError(f"Agent {agent_name!r} has no input area facts")
+
+    rule_pattern = adapter.input_rule_pattern or r'─{10,}'
+    rule_re = re.compile(rule_pattern)
+    lines = pane_text.splitlines()
+    rule_indices = [i for i, line in enumerate(lines) if rule_re.search(line)]
+
+    if len(rule_indices) >= 2:
+        # Exclude the rule lines themselves: lines between rule_indices[-2] + 1 and rule_indices[-1]
+        region_lines = lines[rule_indices[-2] + 1:rule_indices[-1]]
+    elif len(rule_indices) == 1:
+        region_lines = lines[rule_indices[0] + 1:]
+    else:
+        region_lines = lines
+
+    region_text = "\n".join(region_lines)
+
+    prompt = adapter.input_prompt
+    if prompt:
+        region_text = re.sub(r'^\s*' + re.escape(prompt) + r'\s*', '', region_text, flags=re.MULTILINE)
+
+    placeholder = adapter.input_placeholder
+    if placeholder:
+        region_text = region_text.replace(placeholder, '')
+
+    return region_text.strip()