Adapters Module

The Adapters module provides concrete implementations of knowledge base components including readers, vector stores, retrievers, and rerankers.

Import

from praisonai.adapters import (
    # Readers
    AutoReader, TextReader, MarkItDownReader, DirectoryReader,
    
    # Vector Stores
    ChromaVectorStore,
    
    # Retrievers
    BasicRetriever, FusionRetriever,
    
    # Rerankers
    LLMReranker
)

Quick Example

from praisonai.adapters import AutoReader, ChromaVectorStore, BasicRetriever

# Load documents
reader = AutoReader()
docs = reader.load("./documents/")

# Store in vector database
store = ChromaVectorStore(namespace="my_docs")
store.add(
    texts=[d.content for d in docs],
    embeddings=get_embeddings([d.content for d in docs]),
    metadatas=[d.metadata for d in docs]
)

# Retrieve
retriever = BasicRetriever(
    vector_store=store,
    embedding_fn=get_embedding
)
results = retriever.retrieve("search query", top_k=5)

Registering the built-in adapters

register_default_adapters() is the single explicit entry point for wiring the wrapper’s default readers, retrievers, and rerankers into the core-SDK registries.

from praisonai.adapters import register_default_adapters

register_default_adapters()

Prior to PraisonAI 4.6.156, importing praisonai.adapters.readers / retrievers / rerankers implicitly registered the defaults. Import is now side-effect-free — call register_default_adapters() (or the per-family helper) once at startup to wire them in.

Behaviour

Idempotent and thread-safe — subsequent calls are no-ops.
Composite readers (DirectoryReader.load, GlobReader.load, AutoReader.load) auto-wire the built-in readers on first .load() call, so a reader-only workflow works without the explicit call. Retrievers and rerankers have no equivalent safety net — call register_default_adapters() if you look them up by name from the registry.
register_default_vector_stores() is intentionally not wrapped in — it probes chromadb / pinecone on disk and stays opt-in.

Per-family helpers (unchanged, still importable):

from praisonai.adapters.readers import register_default_readers
from praisonai.adapters.retrievers import register_default_retrievers
from praisonai.adapters.rerankers import register_default_rerankers

Native async in custom retrievers / rerankers

BasicRetriever.aretrieve() and its siblings — plus every reranker’s arerank() — offload the blocking body via asyncio.to_thread(...), so calling them from inside an event loop no longer freezes it. If you build a custom retriever or reranker on top of a natively-async provider (e.g. cohere.AsyncClient, an httpx AsyncClient), override the async def and await the native call directly — a to_thread hop over an already-async provider adds latency for no gain.

from praisonai.adapters import BasicRetriever

class MyAsyncRetriever(BasicRetriever):
    async def aretrieve(self, query, top_k=None, filter=None, **kwargs):
        # Await the native-async provider directly — do NOT round-trip through asyncio.to_thread
        return await self._async_client.query(query, top_k=top_k)

Features

Readers: Load documents from files, directories, URLs, and glob patterns
Vector Stores: Store and query document embeddings (ChromaDB, Pinecone)
Retrievers: Find relevant documents (Basic, Fusion, Recursive, AutoMerge)
Rerankers: Improve result relevance (LLM, CrossEncoder, Cohere)

Module Structure

praisonai/adapters/
├── __init__.py          # Lazy loading exports
├── readers.py           # Document readers
├── vector_stores.py     # Vector store adapters
├── retrievers.py        # Retrieval strategies
└── rerankers.py         # Reranking implementations

Available Components

Readers

Class	Description
`AutoReader`	Automatic source detection and routing
`TextReader`	Plain text files (.txt, .log)
`MarkItDownReader`	Rich documents (PDF, DOCX, etc.)
`DirectoryReader`	Recursive directory loading
`GlobReader`	Glob pattern matching
`URLReader`	Web page content

Vector Stores

Class	Description	Requirements
`ChromaVectorStore`	Local persistent storage	`chromadb`
`PineconeVectorStore`	Cloud vector database	`pinecone`

Retrievers

Class	Description
`BasicRetriever`	Simple vector similarity
`FusionRetriever`	Multi-query with RRF
`RecursiveRetriever`	Depth-limited expansion
`AutoMergeRetriever`	Adjacent chunk merging

Rerankers

Class	Description	Requirements
`LLMReranker`	LLM-based scoring	OpenAI/Anthropic API
`CrossEncoderReranker`	Neural reranking	`sentence-transformers`
`CohereReranker`	Cohere Rerank API	`cohere`

Lazy Loading

All adapters use lazy loading to minimize import time:

# Only loads when accessed
from praisonai.adapters import ChromaVectorStore  # Fast import

# Actual loading happens on first use
store = ChromaVectorStore()  # chromadb loaded here

Example: Full RAG Pipeline

from praisonai.adapters import (
    AutoReader,
    ChromaVectorStore,
    FusionRetriever,
    LLMReranker
)
from praisonaiagents import Agent

# 1. Load documents
reader = AutoReader()
docs = reader.load("./knowledge_base/")

# 2. Store with embeddings
store = ChromaVectorStore(namespace="kb")
store.add(
    texts=[d.content for d in docs],
    embeddings=get_embeddings([d.content for d in docs])
)

# 3. Create retriever with fusion
agent = Agent(instructions="Query assistant")
retriever = FusionRetriever(
    vector_store=store,
    embedding_fn=get_embedding,
    llm=agent,
    num_queries=3
)

# 4. Create reranker
reranker = LLMReranker(model="gpt-4o-mini")

# 5. Query pipeline
query = "How to deploy Python apps?"
results = retriever.retrieve(query, top_k=20)
reranked = reranker.rerank(query, [r.text for r in results], top_k=5)

for r in reranked:
    print(f"Score: {r.score:.3f} - {r.text[:100]}...")

CLI Integration

The adapters power the praisonai knowledge CLI commands:

# Add documents (uses readers)
praisonai knowledge add ./docs/

# Query (uses vector store + retriever + reranker)
praisonai knowledge query "search query" \
  --vector-store chroma \
  --retrieval fusion \
  --reranker llm

Readers Module - Document loading
Vector Store Module - Vector storage
Retrieval Module - Document retrieval
Reranker Module - Result reranking

Guide

Reference

Adapters Module

Adapters Module

Import

Quick Example

Registering the built-in adapters

Native async in custom retrievers / rerankers

Features

Module Structure

Available Components

Readers

Vector Stores

Retrievers

Rerankers

Lazy Loading

Example: Full RAG Pipeline

CLI Integration

​Adapters Module

​Import

​Quick Example

​Registering the built-in adapters

​Native async in custom retrievers / rerankers

​Features

​Module Structure

​Available Components

​Readers

​Vector Stores

​Retrievers

​Rerankers

​Lazy Loading

​Example: Full RAG Pipeline

​CLI Integration

​Related

Adapters Module

Import

Quick Example

Registering the built-in adapters

Native async in custom retrievers / rerankers

Features

Module Structure

Available Components

Readers

Vector Stores

Retrievers

Rerankers

Lazy Loading

Example: Full RAG Pipeline

CLI Integration

Related