bug: math equations rendered as raw LaTeX source — agents not instructed to use KaTeX-compatible syntax

[alberti42]

Description

The opencode web/desktop frontend renders math using KaTeX, which requires $...$ for inline equations and $$...$$ (flush-left, surrounded by blank lines) for display equations. However, the system prompts for all agent families give no instruction about this. LLMs default to \(...\) and \[...\], which KaTeX cannot parse, so equations appear as raw LaTeX source instead of rendered formulas (see the screenshot).

Expected behavior: Equations should be rendered by KaTeX as properly formatted math.

Plugins

None

OpenCode version

dev branch (SHA1 68cf011)

Steps to reproduce

Ask any agent (OpenAI, Claude, Gemini, …) a question that involves a mathematical equation, e.g.:

Answer quickly: Can you remind me how the Schrödinger equation looks like?

Screenshot and/or share link

Operating System

All systems

Terminal

Does not apply

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Desktop: Katex Parse Error Bug while using GLM-5 #14748: Desktop: Katex Parse Error Bug while using GLM-5 — also involves KaTeX rendering failures in the desktop app, though the root cause described there is different (parse error with table content vs. LLM using wrong math delimiters)