Fix int() crash on float strings and model alias suffix stripping

src/openharness/config/settings.py

@@ -350,7 +350,9 @@ def resolve_model_setting(
     if provider in {"openai", "openai_codex", "copilot"} and normalized in {"default", "best"}:
         return "gpt-5.4"
 
-    return configured
+    # Strip display-only context-window suffixes like [1M] or [750K] that some
+    # model aliases carry in the UI but that external provider APIs reject.
+    return re.sub(r"\[\d+[KMkm]\]$", "", configured).strip()
 
 
 def auth_source_provider_name(auth_source: str) -> str:

src/openharness/engine/query.py

@@ -407,8 +407,8 @@ def _record_tool_carryover(
     if resolved_file_path is not None:
         _remember_active_artifact(context.tool_metadata, resolved_file_path)
     if tool_name == "read_file" and resolved_file_path is not None:
-        offset = int(tool_input.get("offset") or 0)
-        limit = int(tool_input.get("limit") or 200)
+        offset = int(float(tool_input.get("offset") or 0))
+        limit = int(float(tool_input.get("limit") or 200))
         _remember_read_file(
             context.tool_metadata,
             path=resolved_file_path,

src/openharness/tasks/manager.py

@@ -280,6 +280,7 @@ async def _copy_output(self, task_id: str, process: asyncio.subprocess.Process)
             async with self._output_locks[task_id]:
                 with self._tasks[task_id].output_file.open("ab") as handle:
                     handle.write(chunk)
+                    handle.flush()
 
     def _require_task(self, task_id: str) -> TaskRecord:
         task = self._tasks.get(task_id)