@yuxilabs/gptp-core/dist/engine/render/renderPrompt.js

Core validation, formatting and execution logic for the GPTP file format.

import { interpolate } from '@/utils/interpolation';
import { sha256Hex } from '@/utils/hash';
/**
 * Deterministic render: single-pass interpolation on message content.
 * - No double-rendering (only one interpolate pass per message)
 * - If prompt.system exists and no system message, insert at the top
 * - Emits renderedPromptHash and variablesHash
 */
export function renderPrompt(prompt, variables) {
    const messages = [];
    // Insert system message first if defined and not already present
    const hasSystem = prompt.messages.some((m) => m.role === 'system');
    if (prompt.system && !hasSystem) {
        messages.push({ role: 'system', content: prompt.system });
    }
    for (const msg of prompt.messages) {
        if (typeof msg.content !== 'string') {
            throw new Error(`Invalid message content for role "${msg.role}". Must be a string.`);
        }
        // Single pass interpolation
        const rendered = interpolate(msg.content, variables);
        messages.push({ role: msg.role, content: rendered });
    }
    const renderedPromptHash = sha256Hex({
        messages,
        model: prompt.params?.model,
        of: prompt.output_format,
    });
    const variablesHash = sha256Hex(variables);
    return { renderedMessages: messages, renderedPromptHash, variablesHash };
}