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Documentation Index

Fetch the complete documentation index at: https://docs.agentfront.dev/llms.txt

Use this file to discover all available pages before exploring further.

All errors extend VectoriaError and ship with machine-readable code values so you can branch on them.

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Error Types

ErrorCodeDescription
VectoriaNotInitializedErrorNOT_INITIALIZEDCall initialize() first
DocumentValidationErrorDOCUMENT_VALIDATION_ERRORInvalid document data
DocumentNotFoundErrorDOCUMENT_NOT_FOUNDDocument ID doesn’t exist
DocumentExistsErrorDOCUMENT_EXISTSDocument ID already exists
DuplicateDocumentErrorDUPLICATE_DOCUMENTDuplicate in batch
QueryValidationErrorQUERY_VALIDATION_ERRORInvalid search query
EmbeddingErrorEMBEDDING_ERRORModel embedding failed
StorageErrorSTORAGE_ERRORStorage operation failed
ConfigurationErrorCONFIGURATION_ERRORInvalid config

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Importing Error Classes

import {
  VectoriaError,
  VectoriaNotInitializedError,
  DocumentValidationError,
  DocumentNotFoundError,
  DocumentExistsError,
  DuplicateDocumentError,
  QueryValidationError,
  EmbeddingError,
  StorageError,
  ConfigurationError,
} from 'vectoriadb';

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Error Handling Patterns

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Catch Specific Errors

try {
  await toolIndex.add(doc.id, doc.text, doc.metadata);
} catch (error) {
  if (error instanceof VectoriaNotInitializedError) {
    await toolIndex.initialize();
  } else if (error instanceof DocumentValidationError) {
    console.warn({ tool: error.documentId }, 'invalid document skipped');
  } else if (error instanceof VectoriaError) {
    console.error({ code: error.code }, error.message);
    throw error;
  } else {
    throw error;
  }
}

​
Catch by Error Code

try {
  const results = await toolIndex.search(query);
} catch (error) {
  if (error instanceof VectoriaError) {
    switch (error.code) {
      case 'NOT_INITIALIZED':
        await toolIndex.initialize();
        return toolIndex.search(query);
      case 'QUERY_VALIDATION_ERROR':
        console.error('Invalid query:', error.message);
        return [];
      default:
        throw error;
    }
  }
  throw error;
}

​
Batch Operations with Error Recovery

async function addDocumentsSafely(documents: Array<{ id: string; text: string; metadata: T }>) {
  try {
    await db.addMany(documents);
  } catch (error) {
    if (error instanceof DuplicateDocumentError) {
      // Remove duplicate and retry
      const uniqueDocs = documents.filter((doc) => doc.id !== error.documentId);
      await db.addMany(uniqueDocs);
      console.warn(`Skipped duplicate: ${error.documentId}`);
    } else if (error instanceof DocumentValidationError) {
      // Log validation error and continue with valid documents
      console.error(`Invalid document ${error.documentId}:`, error.message);
      const validDocs = documents.filter((doc) => doc.id !== error.documentId);
      await db.addMany(validDocs);
    } else {
      throw error; // Unexpected error
    }
  }
}

​
Graceful Degradation

async function searchWithFallback(query: string) {
  try {
    return await db.search(query);
  } catch (error) {
    if (error instanceof QueryValidationError) {
      // Fallback to default search
      console.warn('Invalid query, using default search');
      return await db.search('default query', { threshold: 0.1 });
    } else if (error instanceof VectoriaNotInitializedError) {
      // Initialize and retry
      await db.initialize();
      return await db.search(query);
    }
    throw error;
  }
}

​
Monitoring and Health

Use getStats() to feed dashboards or health endpoints: 
const stats = toolIndex.getStats();
/*
{
  totalEmbeddings: number;
  dimensions: number;
  estimatedMemoryBytes: number;
  modelName: string;
}
*/
Pair stats with toolIndex.size(), toolIndex.clear(), and toolIndex.clearStorage() to expose maintenance commands or admin tooling.

​
Best Practices

  1. Always catch specific errors instead of generic Error
  2. Use error codes for programmatic handling
  3. Access error properties (documentId, context, etc.) for debugging
  4. Implement retry logic for VectoriaNotInitializedError
  5. Log validation errors with context for debugging
  6. Graceful fallbacks for production resilience

Overview

Getting started

Indexing

Adding documents

Search

Querying the index