EVA Composition For Agents

Agents should explain EVA as source structure and data flow.

Three Forms

Form	Meaning	What the explanation should make visible
Sequential	One value feeds the next.	The intermediate value is named and consumed.
Conditional	A branch selects the result.	Every branch returns a compatible result.
Parallel	Independent branches run separately.	Branches do not depend on shared intermediate state.

let label = MC_40.CONCAT(prefix, code);
let digest = MC_48.HASH(label);
return digest;

if (amount <= 0) {
    return 0;
}

return 1;

Represent independent values explicitly:

let left_size = MC_43.LEN(left);
let right_size = MC_43.LEN(right);
let total = MC_00.ADD8(left_size, right_size);
return total;

Use symbolic EVA notation only in explanatory prose. Executable examples should use the documented PCD shape for the release being described.