refactor: MoA uses lightweight API references + SDK arbiter as aggregator
Instead of spawning separate processes or using OpenRouter, MoA now:
- Queries external API models (Kimi, GLM) in parallel for opinions
- Injects opinions into the SDK arbiter's prompt
- The existing subscription-based arbiter aggregates all perspectives
No extra SDK processes, no OpenRouter dependency. Per-model config via
MOA_REF_MODELS + MOA_{NAME}_MODEL/BASE_URL/API_KEY env vars.
This commit is contained in:
16
.env.example
16
.env.example
@@ -58,13 +58,17 @@ STATUS_CHANNEL_ID= # Discord channel ID for live status updat
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# ARBITER_FALLBACK_ENABLED=true # Fall back to codex on Claude failure (default: true)
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# --- Mixture of Agents (MoA) ---
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# Queries multiple models in parallel for arbiter verdicts, then aggregates.
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# Requires OpenAI-compatible API (OpenRouter recommended for multi-model access).
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# Queries external API models in parallel before arbiter runs.
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# Their opinions are injected into the arbiter's prompt for better judgment.
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# The SDK arbiter (subscription-based, no extra cost) aggregates all perspectives.
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# MOA_ENABLED=true
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# MOA_BASE_URL=https://openrouter.ai/api/v1
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# MOA_API_KEY=sk-or-xxx
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# MOA_REFERENCE_MODELS=anthropic/claude-sonnet-4-6,openai/gpt-5.4,deepseek/deepseek-chat
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# MOA_AGGREGATOR_MODEL=anthropic/claude-opus-4-6
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# MOA_REF_MODELS=kimi,glm # Comma-separated reference model names
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# MOA_KIMI_MODEL=kimi-k2.5 # Kimi model
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# MOA_KIMI_BASE_URL=https://api.kimi.com/coding # Kimi API endpoint
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# MOA_KIMI_API_KEY=sk-kimi-xxx # Kimi API key
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# MOA_GLM_MODEL=glm-4-plus # GLM model
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# MOA_GLM_BASE_URL=https://open.bigmodel.cn/api/paas/v4 # GLM API endpoint
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# MOA_GLM_API_KEY=xxx # GLM API key
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# --- Advanced ---
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# MAX_CONCURRENT_AGENTS=5 # Max parallel agent processes
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@@ -165,39 +165,35 @@ export function getRoleModelConfig(
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import type { MoaConfig, MoaModelConfig } from './moa.js';
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const MOA_BASE_URL = getEnv('MOA_BASE_URL') || 'https://openrouter.ai/api/v1';
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const MOA_API_KEY = getEnv('MOA_API_KEY') || '';
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function parseMoaModels(envKey: string): MoaModelConfig[] {
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const raw = getEnv(envKey) || '';
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return raw
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/**
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* Parse MOA reference models from env.
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* Format: MOA_REF_MODELS=kimi,glm (comma-separated names)
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* Each model: MOA_{NAME}_MODEL, MOA_{NAME}_BASE_URL, MOA_{NAME}_API_KEY
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*/
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function parseMoaReferenceModels(): MoaModelConfig[] {
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const names = (getEnv('MOA_REF_MODELS') || '')
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.split(',')
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.map((s) => s.trim())
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.filter(Boolean)
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.map((model) => ({
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name: model.split('/').pop() || model,
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model,
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baseUrl: MOA_BASE_URL,
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apiKey: MOA_API_KEY,
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}));
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.filter(Boolean);
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return names
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.map((name) => {
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const prefix = `MOA_${name.toUpperCase()}`;
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const model = getEnv(`${prefix}_MODEL`) || '';
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const baseUrl = getEnv(`${prefix}_BASE_URL`) || '';
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const apiKey = getEnv(`${prefix}_API_KEY`) || '';
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if (!model || !baseUrl || !apiKey) return null;
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return { name, model, baseUrl, apiKey };
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})
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.filter((m): m is MoaModelConfig => m !== null);
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}
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export function getMoaConfig(): MoaConfig {
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const referenceModels = parseMoaModels('MOA_REFERENCE_MODELS');
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const aggregatorModel = getEnv('MOA_AGGREGATOR_MODEL') || '';
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const referenceModels = parseMoaReferenceModels();
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return {
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enabled:
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getEnv('MOA_ENABLED') === 'true' &&
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referenceModels.length > 0 &&
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!!aggregatorModel &&
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!!MOA_API_KEY,
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getEnv('MOA_ENABLED') === 'true' && referenceModels.length > 0,
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referenceModels,
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aggregator: {
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name: aggregatorModel.split('/').pop() || aggregatorModel,
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model: aggregatorModel,
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baseUrl: MOA_BASE_URL,
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apiKey: MOA_API_KEY,
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},
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};
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}
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@@ -25,7 +25,11 @@ vi.mock('./config.js', () => ({
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effort: undefined,
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fallbackEnabled: true,
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})),
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getMoaConfig: vi.fn(() => ({ enabled: false, referenceModels: [], aggregator: {} })),
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getMoaConfig: vi.fn(() => ({
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enabled: false,
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referenceModels: [],
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aggregator: {},
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})),
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TIMEZONE: 'Asia/Seoul',
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}));
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@@ -46,8 +46,7 @@ import {
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getRoleModelConfig,
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getMoaConfig,
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} from './config.js';
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import { buildArbiterContextPrompt } from './arbiter-context.js';
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import { runMoaArbiter } from './moa.js';
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import { collectMoaReferences, formatMoaReferencesForPrompt } from './moa.js';
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import { readArbiterPrompt } from './platform-prompts.js';
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import {
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activateCodexFailover,
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@@ -183,7 +182,48 @@ export async function runAgentForGroup(
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}
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}
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const effectivePrompt = prompt;
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// ── MoA prompt enrichment ─────────────────────────────────────
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// When MoA is enabled and we're in arbiter mode, query external API
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// models (Kimi, GLM, etc.) in parallel for their opinions, then inject
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// those opinions into the arbiter's prompt. The SDK-based arbiter
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// agent naturally aggregates all perspectives.
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let moaEnrichedPrompt = prompt;
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const moaConfig = getMoaConfig();
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if (arbiterMode && moaConfig.enabled && pairedExecutionContext) {
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logger.info(
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{
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chatJid,
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group: group.name,
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runId,
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models: moaConfig.referenceModels.map((m) => m.name),
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},
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'MoA: collecting reference opinions before arbiter',
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);
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const systemPrompt =
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readArbiterPrompt(process.cwd()) || 'You are an arbiter.';
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const references = await collectMoaReferences({
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config: moaConfig,
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systemPrompt,
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contextPrompt: prompt,
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});
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const moaSection = formatMoaReferencesForPrompt(references);
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if (moaSection) {
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moaEnrichedPrompt = prompt + '\n' + moaSection;
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logger.info(
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{
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chatJid,
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successCount: references.filter((r) => !r.error).length,
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totalCount: references.length,
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},
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'MoA: injected reference opinions into arbiter prompt',
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);
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}
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}
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const effectivePrompt = moaEnrichedPrompt;
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let pairedExecutionStatus: 'succeeded' | 'failed' = 'failed';
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let pairedExecutionSummary: string | null = null;
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let pairedExecutionCompleted = false;
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@@ -328,75 +368,6 @@ export async function runAgentForGroup(
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return 'success';
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}
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// ── MoA arbiter path ────────────────────────────────────────────
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// When MoA is enabled and we're in arbiter mode, query multiple
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// models in parallel instead of spawning a single agent process.
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const moaConfig = getMoaConfig();
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if (arbiterMode && moaConfig.enabled && pairedExecutionContext) {
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logger.info(
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{
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chatJid,
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group: group.name,
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runId,
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referenceModels: moaConfig.referenceModels.map((m) => m.model),
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aggregator: moaConfig.aggregator.model,
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},
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'Running MoA arbiter instead of single agent',
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);
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const systemPrompt =
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readArbiterPrompt(process.cwd()) || 'You are an arbiter.';
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const contextPrompt = buildArbiterContextPrompt({
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chatJid,
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taskId: pairedExecutionContext.task.id,
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roundTripCount: pairedExecutionContext.task.round_trip_count,
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timezone: TIMEZONE,
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});
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try {
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const moaResult = await runMoaArbiter({
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config: moaConfig,
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systemPrompt,
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contextPrompt,
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});
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pairedExecutionSummary = moaResult.verdict.slice(0, 500);
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pairedExecutionStatus = 'succeeded';
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// Build display text with reference model opinions
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const referenceSection = moaResult.referenceResponses
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.filter((r) => !r.error)
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.map((r) => `**${r.model}**: ${r.response.split('\n')[0]}`)
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.join('\n');
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const displayText = referenceSection
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? `${moaResult.verdict}\n\n---\n*MoA references: ${moaResult.referenceResponses.filter((r) => !r.error).length} models queried*\n${referenceSection}`
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: moaResult.verdict;
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await onOutput?.({
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status: 'success',
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result: null,
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output: { visibility: 'public', text: displayText },
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phase: 'final',
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});
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} catch (error) {
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logger.error(
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{ chatJid, group: group.name, runId, error },
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'MoA arbiter failed',
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);
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pairedExecutionSummary = 'ESCALATE\nMoA arbiter failed';
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pairedExecutionStatus = 'failed';
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}
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completePairedExecutionContext({
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taskId: pairedExecutionContext.task.id,
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role: 'arbiter',
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status: pairedExecutionStatus,
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summary: pairedExecutionSummary,
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});
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pairedExecutionCompleted = true;
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return pairedExecutionStatus === 'succeeded' ? 'success' : 'error';
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}
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const runAttempt = async (
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provider: string,
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): Promise<{
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@@ -23,7 +23,11 @@ vi.mock('./config.js', () => ({
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isClaudeService: vi.fn(() => true),
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isReviewService: vi.fn(() => false),
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isSessionCommandSenderAllowed: vi.fn(() => false),
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getMoaConfig: vi.fn(() => ({ enabled: false, referenceModels: [], aggregator: {} })),
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getMoaConfig: vi.fn(() => ({
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enabled: false,
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referenceModels: [],
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aggregator: {},
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})),
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TIMEZONE: 'Asia/Seoul',
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}));
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116
src/moa.ts
116
src/moa.ts
@@ -1,9 +1,12 @@
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/**
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* Mixture of Agents (MoA) for arbiter verdicts.
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* Mixture of Agents (MoA) — lightweight reference opinions.
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*
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* Queries multiple LLM models in parallel, then aggregates their
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* opinions into a single binding verdict. Uses OpenAI-compatible
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* chat completions API (works with OpenRouter, direct providers, etc.)
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* Queries external API models (Kimi, GLM, etc.) in parallel for their
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* opinions on the deadlock. These opinions are then injected into the
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* SDK-based arbiter's prompt so it can aggregate all perspectives.
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*
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* No extra SDK processes. The existing arbiter (Claude/Codex subscription)
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* naturally becomes the aggregator.
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*/
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import { logger } from './logger.js';
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@@ -17,7 +20,12 @@ export interface MoaModelConfig {
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export interface MoaConfig {
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enabled: boolean;
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referenceModels: MoaModelConfig[];
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aggregator: MoaModelConfig;
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}
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export interface MoaReferenceResult {
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model: string;
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response: string;
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error?: string;
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}
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async function queryModel(
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@@ -52,7 +60,9 @@ async function queryModel(
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if (!response.ok) {
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const body = await response.text().catch(() => '');
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throw new Error(`${response.status} ${response.statusText}: ${body.slice(0, 200)}`);
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throw new Error(
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`${response.status} ${response.statusText}: ${body.slice(0, 200)}`,
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);
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}
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const data = (await response.json()) as {
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@@ -66,20 +76,23 @@ async function queryModel(
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}
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}
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export async function runMoaArbiter(args: {
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/**
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* Query all reference models in parallel and return their opinions.
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* These are injected into the SDK arbiter's prompt — the arbiter
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* aggregates them into a final verdict.
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*/
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export async function collectMoaReferences(args: {
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config: MoaConfig;
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systemPrompt: string;
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contextPrompt: string;
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}): Promise<{
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verdict: string;
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referenceResponses: { model: string; response: string; error?: string }[];
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}> {
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}): Promise<MoaReferenceResult[]> {
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const { config, systemPrompt, contextPrompt } = args;
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// Phase 1: Query reference models in parallel
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logger.info(
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{ modelCount: config.referenceModels.length },
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'MoA: querying reference models',
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{
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models: config.referenceModels.map((m) => m.name),
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},
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'MoA: querying reference models for opinions',
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);
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const results = await Promise.allSettled(
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@@ -88,7 +101,7 @@ export async function runMoaArbiter(args: {
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),
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);
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const referenceResponses = results.map((result, i) => {
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return results.map((result, i) => {
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const model = config.referenceModels[i].name;
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if (result.status === 'fulfilled') {
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logger.info(
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@@ -104,68 +117,31 @@ export async function runMoaArbiter(args: {
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logger.warn({ model, error }, 'MoA: reference model failed');
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return { model, response: '', error };
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});
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}
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const successfulResponses = referenceResponses.filter((r) => !r.error);
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/**
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* Format reference opinions into a section that gets appended
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* to the arbiter's prompt.
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*/
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export function formatMoaReferencesForPrompt(
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references: MoaReferenceResult[],
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): string | null {
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const successful = references.filter((r) => !r.error && r.response);
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if (successful.length === 0) return null;
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if (successfulResponses.length === 0) {
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logger.error('MoA: all reference models failed, using ESCALATE');
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return {
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verdict:
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'ESCALATE\n\nAll reference models failed to respond. Human judgment required.',
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referenceResponses,
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};
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}
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// Phase 2: Aggregate via aggregator model
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const opinions = successfulResponses
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.map((r, i) => `### Opinion ${i + 1} (${r.model}):\n${r.response}`)
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const opinions = successful
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.map((r) => `### ${r.model}:\n${r.response}`)
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.join('\n\n---\n\n');
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const aggregatorPrompt = [
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contextPrompt,
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return [
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'',
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'---',
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'',
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`The following ${successfulResponses.length} independent AI models have each reviewed the deadlock and provided their analysis:`,
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`<moa-references count="${successful.length}">`,
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`The following ${successful.length} independent AI models have also reviewed this deadlock:`,
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'',
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opinions,
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'',
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'---',
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'',
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'Consider all perspectives above. Where they agree, that strengthens the case.',
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'Where they disagree, weigh the evidence each side presents.',
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'Render your final verdict. Start your first line with: PROCEED, REVISE, RESET, or ESCALATE.',
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'Consider these perspectives alongside the conversation. Where they agree, that strengthens the case.',
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'Where they disagree, weigh the evidence. Your verdict is final.',
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'</moa-references>',
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].join('\n');
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logger.info(
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{ aggregator: config.aggregator.name },
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'MoA: running aggregator',
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);
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try {
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const verdict = await queryModel(
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config.aggregator,
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systemPrompt,
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aggregatorPrompt,
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90_000,
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);
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logger.info(
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{
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aggregator: config.aggregator.name,
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verdictPreview: verdict.slice(0, 100),
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},
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'MoA: aggregator verdict rendered',
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);
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return { verdict, referenceResponses };
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} catch (error) {
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// Aggregator failed — fall back to majority vote from reference models
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logger.warn(
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{ error },
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'MoA: aggregator failed, falling back to first successful reference',
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);
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return {
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verdict: successfulResponses[0].response,
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referenceResponses,
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};
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}
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}
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Reference in New Issue
Block a user