Fix pyright error and ruff format issues

_message_text: guard the callable result with an isinstance check so
pyright accepts the str return (getattr on object yields object).
Formatting: restore the blank line before _is_injected_user_text and
collapse two over-split string literals in the compact tests.

Author: beacoder

python_agent_harness/prompts.py

@@ -348,7 +348,9 @@ def _message_text(msg: object) -> str:
     """Plain text of a Message object or an OpenAI-style dict."""
     text = getattr(msg, "text", None)
     if callable(text):
-        return text()
+        result = text()
+        if isinstance(result, str):
+            return result
     if not isinstance(msg, dict):
         return ""
     content = msg.get("content")

python_agent_harness/tui.py

@@ -103,6 +103,7 @@ def _tool_result_preview(content: str) -> str:
 # Goal:/Status:/Evidence: labels (anywhere in the block, any lines)
 _FINAL_CHECK_RE = re.compile(r"\[FINAL CHECK\].*Goal:.*Status:.*Evidence:", re.DOTALL)
 
+
 def _is_injected_user_text(text: str) -> bool:
     """True for harness-injected user messages (not user input).
 

tests/test_agent.py

@@ -1587,8 +1587,7 @@ def test_compact_keeps_prompts_excluding_nudges_and_frames(self):
         /build switch must not contradict the build notice."""
         session = RecordingSession()
         plan_notice = (
-            "The plan at /tmp/x/PLAN.md has been approved, "
-            "you can now edit files. Execute the plan"
+            "The plan at /tmp/x/PLAN.md has been approved, you can now edit files. Execute the plan"
         )
         loop = AgentLoop(
             session,

tests/test_prompts.py

@@ -389,8 +389,7 @@ def test_plan_exit_notice_is_latest_reminder(self):
         the plan->build handoff and supersedes the earlier plan-mode
         batch (which is no longer the current mode state)."""
         notice = (
-            "The plan at /tmp/x/PLAN.md has been approved, "
-            "you can now edit files. Execute the plan"
+            "The plan at /tmp/x/PLAN.md has been approved, you can now edit files. Execute the plan"
         )
         msgs = [
             {"role": "user", "content": "<system-reminder>\nPlan mode ACTIVE."},