Subj : src/sbbs3/chat.cpp
To   : Git commit to main/sbbs/master
From : Rob Swindell (on Debian Linux)
Date : Sun Jun 21 2026 00:59:50

https://gitlab.synchro.net/main/sbbs/-/commit/525bfd166fe44c4405da4ecb
Modified Files:
	src/sbbs3/chat.cpp
Log Message:
chat: emit UTF-8 guru replies correctly to UTF-8 terminals (fix mojibake)

Guru replies come off the LLM as UTF-8, but they were pushed through
CP437-assuming output primitives that re-encode each byte to the
terminal charset.  On a UTF-8 terminal this double-encoded every
multibyte character into mojibake (e.g. a curly apostrophe shown as
three glyphs), and any node-spy (sbbsctrl, mqtt_spy.js) mirroring the
node's byte stream saw the same corruption.

Fix both output paths:

- Multinode (chat_llm_multinode_turn): stop pre-converting the reply to
  CP437 based on the reader's terminal and emit with bprintf(P_AUTO_UTF8,
  ...).  The reply stays UTF-8; bputs() adapts per terminal -- raw UTF-8
  to a UTF-8 term, print_utf8_as_cp437() to a CP437 term.

- 1-on-1 streamed and non-streamed (simulate_type, the shared chokepoint
  reached via js_simulate_type and chat_llm_session): when the terminal
  is UTF-8, emit each multibyte codepoint atomically via bputs(seq,
  P_UTF8) instead of byte-by-byte outchar().  Typo simulation correctly
  applies to ASCII only.  Robust to a codepoint split across SSE tokens
  (bytes still go out raw and in order).  The speed_factor<=0 fast path
  uses P_AUTO_UTF8.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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