chat: LaTeX math ($...$) is not rendered in messages #51725

Summary

Math written with LaTeX delimiters ($...$ and $$...$$) is shown literally in chat messages instead of being rendered, so the maths is unreadable.

Environment

• opencode version: 2.0.16
• OS: Darwin 25.5.0 (macOS, arm64)
• Terminal: TERM=xterm-256color; TERM_PROGRAM and COLORTERM unset
• Shell: /bin/zsh
• Install/channel: latest
• Active plugins: none found

Reproduction

1. Open a chat.
2. Send or receive a message with inline math, e.g. The distance is $d_i = \sqrt{(x_i-\bar{x})^\top S^{-1}(x_i-\bar{x})}$.
3. Also try display math delimited by $$ ... $$.

Expected Behavior

The math renders as a formatted equation (or the delimiters are at least not shown as literal text).

Actual Behavior

The $...$ delimiters appear literally and the expression stays unformatted, making it hard to read. The user had to ask the assistant to stop using $...$ entirely.

Additional Context

Hit repeatedly while using opencode for a statistics assignment. Reasonable fixes: add KaTeX/MathJax-style rendering for $...$ and $$...$$, or, failing that, document that math isn't rendered and instruct models to avoid LaTeX delimiters in chat.