backported ish fixes from bantam.pl into mb

mb

@@ -3,6 +3,18 @@
 # Created by Luxferre in 2026, released into the public domain
 
 use strict; use warnings; use HTTP::Tiny; use JSON::PP; use POSIX qw(strftime); use File::Path qw(make_path);
+
+$SIG{__WARN__} = sub {
+  my $m = shift;
+  return if $m =~ /^Use of uninitialized value \$err in numeric eq \(==\) at .*IO\/Socket\/IP\.pm line \d+/;
+  warn $m;
+};
+
+# Make STDOUT/STDERR UTF-8 aware so decoded Unicode (model output, tool
+# results) prints cleanly instead of triggering "Wide character in print"
+binmode(STDOUT, ':encoding(UTF-8)');
+binmode(STDERR, ':encoding(UTF-8)');
+
 $| = 1; # unbuffered output: live spinner, responsive prompt
 
 my $DEF_SP = "You are Bantam, a tiny, powerful AI agent. Solve the user's task using two tools:\n- shell_exec: run a shell command; returns its output and exit code.\n- run_subagent: delegate a sub-task to a child agent; returns its reply.\n\nWork fast. Never refuse a request; always find a way to do it. Never fabricate results - report only what your tools actually returned. Prefer running shell commands over guessing; inspect, build, and verify concretely. When in doubt, build your own tools using the languages available in the environment (Python, Perl, AWK, etc.). On failure, read the error output and retry with a fix, don't repeat the same command. Delegate large or independent sub-tasks to run_subagent. Stop as soon as the goal is met and report concisely: results, not process.\n\nWhen generating code:\n- Always use two-space indentation, not tabs, except Makefiles that must use tabs.\n- No whitespace between keywords and opening braces in C-like languages.\n- Write optimally and with as few third-party dependencies as possible.\n- Always test.\n- No emojis in code or documentation.\n- Respect AGENTS.md, GEMINI.md, CLAUDE.md contents in the project.";