Math notation

Every prose field of a spec accepts inline LaTeX between $…$ — the same delimiters as GitHub markdown. Writing "$B_{in}$" renders a B with an "in" subscript, so a circuit diagram can be labelled the way a textbook labels it.

Nothing is downloaded to make this work: the supported commands each resolve to a plain character, using the theme's own font.

nodes: [
  { id: 'bin', type: 'signal', text: '$B_{in}$' },
  { id: 'out', type: 'signal', text: '$\\overline{A}$' },
],

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The backslash trap in a .ts / .js spec

In a JavaScript string, '\overline' silently becomes 'overline' — an unrecognized escape sequence loses its backslash, and your overbar just disappears. Double it: '$\\overline{A}$'. Same in a JSON file: "$\\overline{A}$". Subscripts are unaffected ('$B_{in}$' has no backslash).

Outside the $, nothing changes

Text outside a math span stays literal. An existing label keeps its meaning: snake_case is not a subscript, and Total: 5$ is not a half-open span. To write a dollar next to math, escape it: \$.

Where it works

Anywhere you write prose:

• node labels — text, value, unit;
• the body of a geometric shape (square … star);
• zone labels (label);
• connection and tree-edge labels (text);
• the text of the comment and arrow actions.

It does not apply to the header / body of a text panel (simple_node, complex_node) or of a packet. Those go through syntax highlighting, where $ is a legitimate code character — a PHP variable would turn into math.

Supported syntax

Syntax	Renders
_x · _{…}	subscript — $B_{in}$
^x · ^{…}	superscript — $n^2$
{…}	group several atoms
\overline{…}	overbar — the complement $\overline{A}$
\text{…} · \mathrm{…}	upright text inside math
\alpha…\omega · \Gamma…\Omega	Greek letters
\cdot \times \pm \leq \neq \approx	operators and relations
\to \rightarrow \Rightarrow	arrows
\land \lor \neg \oplus	logic
\, \; \quad \!	spacing

Following LaTeX, letters render italic — they are variables — while digits, operators and uppercase Greek stay upright. That is what keeps 10 kΩ reading as a unit instead of a product of variables:

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Not supported

\frac, matrices and $$…$$ display math are deliberately out of scope: a label on a diagram is one line tall, and a construct that needs two would break the layout it sits in. A $$ is left as literal text rather than silently dropped.

Superscripts, Greek and relations work in comments too:

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