diff --git a/cecli/__init__.py b/cecli/__init__.py
index 45c3b410f3d..000258ef690 100644
--- a/cecli/__init__.py
+++ b/cecli/__init__.py
@@ -1,6 +1,6 @@
 from packaging import version
 
-__version__ = "1.0.2.dev"
+__version__ = "1.0.3.dev"
 safe_version = __version__
 
 try:
diff --git a/cecli/coders/base_coder.py b/cecli/coders/base_coder.py
index 8ec70e7c8c7..f7c3b3c2419 100755
--- a/cecli/coders/base_coder.py
+++ b/cecli/coders/base_coder.py
@@ -464,9 +464,13 @@ def __init__(
         self.abs_root_path_cache = {}
 
         self.auto_copy_context = auto_copy_context
-        self.security_config = security_config or {}
         self.auto_accept_architect = auto_accept_architect
 
+        try:
+            self.security_config = json.loads(security_config)
+        except (json.JSONDecodeError, TypeError):
+            self.security_config = {}
+
         self.ignore_mentions = ignore_mentions
         if not self.ignore_mentions:
             self.ignore_mentions = set()
diff --git a/cecli/helpers/io_proxy.py b/cecli/helpers/io_proxy.py
index bc6ce8aa475..bc5754f4e1a 100644
--- a/cecli/helpers/io_proxy.py
+++ b/cecli/helpers/io_proxy.py
@@ -6,6 +6,7 @@
 """
 
 import asyncio
+import logging
 import queue as _queue
 import weakref
 from typing import TYPE_CHECKING, Any, Generic, TypeVar
@@ -15,6 +16,8 @@
 
 T = TypeVar("T")
 
+logger = logging.getLogger(__name__)
+
 
 class IOProxy(Generic[T]):
     """Facade wrapping an InputOutput instance with coder context.
@@ -234,6 +237,10 @@ async def stop_output_task(self):
                 IndexError,
                 RuntimeError,
             ):
+                e = task.exception()
+                if e:
+                    logger.error(e, exc_info=True)
+
                 import traceback
 
                 traceback_str = traceback.format_exc()
diff --git a/cecli/helpers/requests.py b/cecli/helpers/requests.py
index b092cc842ba..84634906f95 100644
--- a/cecli/helpers/requests.py
+++ b/cecli/helpers/requests.py
@@ -13,8 +13,35 @@ def add_reasoning_content(messages):
     for msg in messages:
         if msg.get("role") == "assistant" and "reasoning_content" not in msg:
             msg["reasoning_content"] = ""
+
         if msg.get("provider_specific_fields", None):
             msg["provider_specific_fields"].pop("reasoning_content", None)
+
+            if (
+                msg["provider_specific_fields"].get("reasoning_items", None) is not None
+                and msg.get("reasoning_items", None) is None
+            ):
+                msg["reasoning_items"] = msg["provider_specific_fields"].pop(
+                    "reasoning_items", None
+                )
+                msg.pop("reasoning_content", None)
+
+            if (
+                msg["provider_specific_fields"].get("reasoning_text", None) is not None
+                and msg.get("reasoning_text", None) is None
+            ):
+                msg["reasoning_text"] = msg["provider_specific_fields"].pop("reasoning_text", None)
+                msg.pop("reasoning_content", None)
+
+            if (
+                msg["provider_specific_fields"].get("reasoning_opaque", None) is not None
+                and msg.get("reasoning_opaque", None) is None
+            ):
+                msg["reasoning_opaque"] = msg["provider_specific_fields"].pop(
+                    "reasoning_opaque", None
+                )
+                msg.pop("reasoning_content", None)
+
     return messages
 
 
diff --git a/cecli/llm.py b/cecli/llm.py
index edd264a241a..594f81da78f 100644
--- a/cecli/llm.py
+++ b/cecli/llm.py
@@ -108,6 +108,31 @@ def _patched_delta_init(self_delta, *args, **kwargs):
             # Intercept and map 'reasoning_text' to 'reasoning_content'
             if kwargs.get("reasoning_content") is None and "reasoning_text" in kwargs:
                 kwargs["reasoning_content"] = kwargs.pop("reasoning_text", None)
+
+            if kwargs.get("reasoning_text", None) is not None:
+                if kwargs.get("provider_specific_fields") is None:
+                    kwargs["provider_specific_fields"] = {}
+
+                kwargs["provider_specific_fields"]["reasoning_text"] = kwargs.pop(
+                    "reasoning_text", None
+                )
+
+            if kwargs.get("reasoning_opaque", None) is not None:
+                if kwargs.get("provider_specific_fields") is None:
+                    kwargs["provider_specific_fields"] = {}
+
+                kwargs["provider_specific_fields"]["reasoning_opaque"] = kwargs.pop(
+                    "reasoning_opaque", None
+                )
+
+            if kwargs.get("reasoning_items", None) is not None:
+                if kwargs.get("provider_specific_fields") is None:
+                    kwargs["provider_specific_fields"] = {}
+
+                kwargs["provider_specific_fields"]["reasoning_items"] = kwargs.pop(
+                    "reasoning_items", None
+                )
+
             # Pass the modified kwargs to the original __init__
             _original_delta_init(self_delta, *args, **kwargs)
 
diff --git a/cecli/tui/app.py b/cecli/tui/app.py
index 991d94bc19e..9182abe0a5c 100644
--- a/cecli/tui/app.py
+++ b/cecli/tui/app.py
@@ -745,6 +745,19 @@ def enable_input(self, msg, coder=None):
 
         input_area.focus()
 
+    def copy_to_clipboard(self, text: str) -> None:
+        import pyperclip
+
+        try:
+            pyperclip.copy(text)
+            self._clipboard = text
+        except Exception:  # pragma: no cover - system clipboard errors
+            self.worker.coder.io.tool_error("Failed to copy to system clipboard.")
+            self.worker.coder.io.tool_output(
+                "You may need to install xclip, xsel, or wl-clipboard on Linux, or pbcopy on macOS."
+            )
+            super().copy_to_clipboard(text)
+
     def update_spinner(self, msg, agent_name: str | None = None):
         """Update spinner in footer."""
         footer = self.query_one(MainFooter)
diff --git a/cecli/tui/widgets/input_area.py b/cecli/tui/widgets/input_area.py
index 453e96ecd90..198dd70dd84 100644
--- a/cecli/tui/widgets/input_area.py
+++ b/cecli/tui/widgets/input_area.py
@@ -395,3 +395,22 @@ def on_text_area_changed(self, event) -> None:
 
             if val.startswith("/") or "@" in val or possible_path or self.completion_active:
                 self.post_message(self.CompletionRequested(val))
+
+    def _refresh_size(self) -> None:
+        """Refresh size, clamping cursor to document bounds first.
+
+        Workaround for a Textual bug where undo of a multi-line paste leaves
+        cursor_location pointing to a line that no longer exists after undo,
+        causing a ValueError when _refresh_size triggers scroll_cursor_visible.
+        """
+        try:
+            doc_line_count = self.document.line_count
+            cursor_row, cursor_col = self.cursor_location
+            if cursor_row >= doc_line_count:
+                clamped_row = max(0, doc_line_count - 1)
+                line_text = self.document.get_line(clamped_row)
+                clamped_col = min(cursor_col, len(line_text))
+                self.cursor_location = (clamped_row, clamped_col)
+        except (ValueError, IndexError, AttributeError):
+            pass
+        super()._refresh_size()
diff --git a/cecli/tui/widgets/selectable_log.py b/cecli/tui/widgets/selectable_log.py
index f4c85feffbf..4b54b5fa8e2 100644
--- a/cecli/tui/widgets/selectable_log.py
+++ b/cecli/tui/widgets/selectable_log.py
@@ -96,7 +96,7 @@ def get_selected_text(self, copy=False) -> str | None:
         lines = []
         for i in range(lo, hi + 1):
             text = "".join(seg.text for seg in self.lines[i] if seg.text)
-            lines.append(text)
+            lines.append(text.rstrip())
 
         text = "\n".join(lines)
         if not copy:
diff --git a/cecli/tui/worker.py b/cecli/tui/worker.py
index 4b28fcf7e89..6ad917b8fda 100644
--- a/cecli/tui/worker.py
+++ b/cecli/tui/worker.py
@@ -107,6 +107,8 @@ async def _async_run(self):
                 await self._handle_switch_coder_signal(switch)
                 # Continue the loop with the new coder
             except Exception as e:
+                logger.error(e, exc_info=True)
+
                 self.output_queue.put(
                     {
                         "type": "error",