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fix: prevent stdout pollution breaking MCP JSON protocol #48

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fix: prevent stdout pollution breaking MCP JSON protocol #48

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14 changes: 10 additions & 4 deletions src/embeddings.ts
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Original file line number Diff line number Diff line change
@@ -1,15 +1,21 @@
import { pipeline, Pipeline, FeatureExtractionPipeline } from '@xenova/transformers';
import { pipeline, Pipeline, FeatureExtractionPipeline, env } from '@xenova/transformers';

// Disable progress callbacks to prevent stdout pollution in MCP context
// In MCP, stdout is reserved for JSON-RPC communication
env.allowLocalModels = true;
env.useBrowserCache = false;

let embeddingPipeline: FeatureExtractionPipeline | null = null;

export async function initEmbeddings(): Promise<void> {
if (!embeddingPipeline) {
console.log('Loading embedding model (first run may take time)...');
console.error('Loading embedding model (first run may take time)...');
embeddingPipeline = await pipeline(
'feature-extraction',
'Xenova/all-MiniLM-L6-v2'
'Xenova/all-MiniLM-L6-v2',
{ progress_callback: null } // Disable progress output to stdout
);
console.log('Embedding model loaded');
console.error('Embedding model loaded');
}
}

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