The old test `test_make_console_uses_force_terminal` hardcoded
`force_terminal is True`, which contradicts the fix: we now defer
to sys.stdout.isatty() so piped / non-TTY output gets plain text
instead of ANSI escape codes.
Split into two tests covering both branches:
- test_make_console_force_terminal_when_stdout_is_tty: TTY path
(force_terminal=True, rich output)
- test_make_console_force_terminal_false_when_stdout_is_not_tty:
non-TTY path (force_terminal=False, plain text) — regression
guard for the bug reported in #3265
Co-authored with Claude Opus 4.7
Fix accidental line corruption in split_message() where 'break' was
merged with unrelated code during manual editing.
The actual fix: build_assistant_message() now returns content or ""
instead of content (which could be None), preventing providers like
MiMo V2 Omni from rejecting tool-call messages with missing text field.
Fixes#2519
MCP SDK's anyio cancel scopes can leak CancelledError on timeout or
failure paths. Since CancelledError is a BaseException (not Exception),
it escapes both MCPToolWrapper.execute() and ToolRegistry.execute(),
crashing the agent loop.
Now catches CancelledError and returns a graceful error to the LLM,
while still re-raising genuine task cancellations from /stop.
Also catches general Exception for other MCP failures (connection
drops, invalid responses, etc.).
Related: #1055
Alfredo ArenasandXubin Ren
