Hybrid Search

import asyncio
from definable.agent import Agent
from definable.knowledge import Knowledge, FTSIndex, HybridSearchConfig
from definable.vectordb import InMemoryVectorDB

# Create FTS index (must initialize before use)
fts = FTSIndex()

async def main():
    await fts.initialize()

    knowledge = Knowledge(
        vector_db=InMemoryVectorDB(),
        fts_index=fts,
        hybrid_config=HybridSearchConfig(
            merge_strategy="rrf",  # reciprocal rank fusion
            vector_weight=0.7,
            text_weight=0.3,
        ),
    )

    # Add documents (auto-indexed in both vector DB and FTS)
    await knowledge.aadd("Python 3.12 introduced new syntax features.")
    await knowledge.aadd("Definable requires Python 3.12 or higher.")
    await knowledge.aadd("The framework uses async/await for non-blocking I/O.")

    agent = Agent(
        model="gpt-4o",
        knowledge=knowledge,
        instructions="Answer using the knowledge base.",
    )

    output = await agent.arun("What Python version does Definable need?")
    print(output.content)

asyncio.run(main())