rag7 0.9.1

rag7 — multi-backend retrieval-augmented generation with LangGraph

rag7 🕵️🍸🚗🎯 — Licensed to Retrieve

Not just hybrid search. A true autonomous retrieval agent.
Shaken, not stirred — plug in any vector store, any LLM, any reranker.
The mission: find the right documents, neutralise irrelevant noise, and deliver the answer. Every time.

---

from rag7 import init_agent

rag = init_agent("documents", model="openai:gpt-5.4", backend="qdrant")
state = rag.chat("What is the status of operation overlord?")
# Your answer. Shaken, not stirred.

---

🎯 Scope — Retrieval, Not Ingestion

rag7 is built for optimal retrieval. The mission is finding the right documents at query time — hybrid search, reranking, query rewriting, autonomous retry loops, and an LLM quality gate.

Ingestion is out of scope. rag7 does not chunk, clean, embed-at-scale, or index your corpus. Use your stack of choice for that — Docling, Unstructured, LlamaIndex ingestion pipelines, a Databricks job, a custom script — then point rag7 at the resulting index. Every backend exposes a minimal add_documents() helper for convenience and smoke tests, but it is not meant to replace a real ingestion pipeline.

Keeping the surface narrow is deliberate: one thing, done well.

---

🕵️ The Agent

"We have a problem. Millions of documents. One question. And the clock is ticking."

Most retrieval systems send a junior analyst — one query, one pass, done. Fast, cheap, and dangerously incomplete.

So they sent rag7. Licensed to retrieve. Never satisfied with good enough.

Before every mission, rag7 visits Q's lab: 8 backends to operate from, any LLM as the intelligence source, precision rerankers to separate signal from noise, and a tool-calling agent that inspects schemas, builds filters on the fly, and adapts to whatever the index throws at it.

In the field, it plans, infiltrates, and interrogates — running parallel searches across BM25 and vector space, fusing the evidence, and cross-examining every result through an LLM quality gate. When the trail goes cold, it rewrites the query and tries again. It doesn't stop until the mission is complete.

Only once the evidence is airtight does it surface the answer. Cited. Grounded. Delivered.

🍸 "Shaken, not stirred — and always on target." 🎯

Not in the name of any crown or government. In the name of whoever is seeking the truth in their data.

---

🕵️ How It Works

Most RAG libraries are pipelines — query in, documents out, done. rag7 is an agent.

Like a field operative, it doesn't execute a single search and report back. It thinks, adapts, and keeps going until the mission is complete:

1. 🧠 Understands the intent — rewrites your query into precise search keywords, detects whether it's a keyword lookup or semantic question, and adjusts the hybrid search ratio accordingly
2. 🔍 Searches intelligently — runs multiple query variants simultaneously across BM25 and vector search, fuses the results, and re-ranks with a dedicated reranker
3. 🧐 Judges the results — an LLM quality gate evaluates whether the retrieved documents actually answer the question
4. 🔄 Adapts autonomously — if results are off-target, rewrites the query and tries again; if a single approach fails, fans out into a swarm of parallel search strategies
5. ✍️ Delivers the answer — only once it's confident the evidence is solid does it generate a cited, grounded response

This is the difference between a search box and a field agent.

---

✨ Features

• 🚗 Fast as an Aston Martin — fully async pipeline, parallel HyDE + preprocessing, zero blocking calls
• 🎯 On target, every time — LLM quality gate rejects weak results and rewrites the query until the evidence is airtight
• 🔬 Deep research, not shallow search — multi-query swarm fans out across BM25 and vector space simultaneously, fusing intelligence from every angle
• 🃏 Always has an ace up its sleeve — when one approach fails, swarm retrieval deploys parallel strategies as backup
• 🕵️ True agentic loop — retrieve → judge → rewrite → retry, fully autonomous, up to max_iter rounds
• 🔍 Hybrid search — BM25 + vector, fused with RRF or DBSF
• 🧠 HyDE — hypothetical document embeddings for better recall on vague queries
• 🛠️ Tool-calling agent — get_index_settings, get_filter_values, search_hybrid, search_bm25, rerank_results — LLM picks tools dynamically
• 🏆 Multi-reranker — Cohere, HuggingFace, Jina, ColBERT, RankGPT, embed-anything, or custom
• 🗄️ 8 backends — Meilisearch, Azure AI Search, ChromaDB, LanceDB, Qdrant, pgvector, DuckDB, InMemory
• 🤖 Any LLM — OpenAI, Azure, Anthropic, Ollama, Vertex AI, or any LangChain model
• ⚡ One-line init — init_agent("docs", model="openai:gpt-5.4", backend="qdrant") — no imports needed
• 💬 Multi-turn chat — conversation history with citation-aware answers
• 🎯 Auto-strategy — LLM samples your collection and tunes itself automatically
• 🏎️ Optuna auto-tuner — 20+ retrieval knobs tuned to YOUR corpus in ~5 min; None as first-class value for disabling stages. Full guide · Quick jump
• 🔄 Async-native — every operation has a sync and async variant

---

📦 Install

# Recommended — Meilisearch + Cohere reranker + interactive CLI
pip install rag7[recommended]

# Base only — in-memory backend, BM25 keyword search
pip install rag7

Extra	What you get	Command
recommended	Meilisearch + Cohere reranker + Rich CLI	pip install rag7[recommended]
cli	Interactive CLI with guided setup wizard	pip install rag7[cli]
all	Every backend + reranker + CLI	pip install rag7[all]

🍸 Bond Edition extras — because every mission needs a code name

Extra	Code name	Stack
goldeneye	GoldenEye	Meilisearch + Cohere + CLI — the classic recommended loadout
skyfall	Skyfall	Everything. All backends, all rerankers, all CLI — nothing left behind
thunderball	Thunderball	Qdrant + Cohere + CLI — vector power meets precision reranking
moonraker	Moonraker	ChromaDB + HuggingFace — fully local, no API keys, off the grid
goldfinger	Goldfinger	Azure AI Search + Azure OpenAI + Cohere — all gold, all cloud
spectre	Spectre	pgvector + HuggingFace — open-source shadow ops, no paid APIs
casino-royale	Casino Royale	ChromaDB + Jina — lightweight first mission
licence-to-kill	Licence to Kill	embed-anything + ChromaDB — Rust-powered, fully local, zero API keys

pip install rag7[goldeneye]      # 🍸 The classic
pip install rag7[skyfall]        # 💥 Everything falls into place
pip install rag7[thunderball]    # ⚡ Vector power + precision
pip install rag7[moonraker]     # 🌙 Fully local, no API keys
pip install rag7[goldfinger]     # ☁️  All Azure, all gold
pip install rag7[spectre]        # 👻 Open-source, no paid APIs
pip install rag7[casino-royale]  # 🎰 Lightweight first mission
pip install rag7[licence-to-kill] # 🦀 Rust-powered, fully local

Individual backends & rerankers

pip install rag7[meilisearch]     # 🔎 Meilisearch
pip install rag7[azure]           # ☁️  Azure AI Search
pip install rag7[chromadb]        # 🟣 ChromaDB
pip install rag7[lancedb]         # 🏹 LanceDB
pip install rag7[pgvector]        # 🐘 PostgreSQL + pgvector
pip install rag7[qdrant]          # 🟡 Qdrant
pip install rag7[duckdb]          # 🦆 DuckDB
pip install rag7[cohere]          # 🏅 Cohere reranker
pip install rag7[huggingface]     # 🤗 HuggingFace cross-encoder (local)
pip install rag7[jina]            # 🌊 Jina reranker
pip install rag7[rerankers]       # 🎯 rerankers (ColBERT, Flashrank, RankGPT, …)
pip install rag7[embed-anything]  # 🦀 Embed-anything (local Rust-accelerated embeddings + reranking)

Mix and match: pip install rag7[qdrant,cohere,cli]

---

🚀 Quick Start

One-liner with init_agent

The fastest way to get started — no provider imports, string aliases for everything:

from rag7 import init_agent

# Minimal — in-memory backend, LLM from env vars
rag = init_agent("docs")

# OpenAI + Qdrant + Cohere reranker
rag = init_agent(
    "my-collection",
    model="openai:gpt-5.4",
    backend="qdrant",
    backend_url="http://localhost:6333",
    reranker="cohere",
)

# Anthropic + Azure AI Search (native vectorisation, no client-side embeddings)
rag = init_agent(
    "my-index",
    model="anthropic:claude-sonnet-4-6",
    gen_model="anthropic:claude-opus-4-6",
    backend="azure",
    backend_url="https://my-search.search.windows.net",
    reranker="huggingface",
    auto_strategy=True,
)

# Fully local — Ollama + ChromaDB + HuggingFace cross-encoder
rag = init_agent(
    "docs",
    model="ollama:llama3",
    backend="chroma",
    reranker="huggingface",
    reranker_model="cross-encoder/ms-marco-MiniLM-L-6-v2",
)

Multi-collection routing

Pass several collections and let the agent decide which to search. The LLM picks the relevant subset before retrieval, using either the collection names alone or optional natural-language descriptions.

from rag7 import init_agent

# List form — LLM routes by name only
rag = init_agent(
    collections=["products", "faq", "policies"],
    backend="qdrant",
    backend_url="http://localhost:6333",
    model="openai:gpt-5.4",
)

# Dict form — LLM routes using descriptions (better precision)
rag = init_agent(
    collections={
        "products": "Product catalog: SKUs, prices, specs, availability",
        "faq":      "Customer-facing FAQ, troubleshooting, return policy",
        "policies": "Internal HR/legal/compliance policy documents",
    },
    backend="qdrant",
    backend_url="http://localhost:6333",
    model="openai:gpt-5.4",
)

rag.invoke("What's our return policy?")       # → routes to faq / policies
rag.invoke("Price of SKU 12345?")              # → routes to products

Each retrieved document carries its origin in metadata["_collection"] so you can merge, filter, or attribute citations downstream. One backend instance is built per collection; they share the same backend type and URL.

Backend aliases

Alias	Class	Extra
"memory" / "in_memory"	InMemoryBackend	(none)
"chroma" / "chromadb"	ChromaDBBackend	rag7[chromadb]
"qdrant"	QdrantBackend	rag7[qdrant]
"lancedb" / "lance"	LanceDBBackend	rag7[lancedb]
"duckdb"	DuckDBBackend	rag7[duckdb]
"pgvector" / "pg"	PgvectorBackend	rag7[pgvector]
"meilisearch"	MeilisearchBackend	rag7[meilisearch]
"azure"	AzureAISearchBackend	rag7[azure]

Reranker aliases

Alias	Class	reranker_model	Extra
"cohere"	CohereReranker	Cohere model name (default: rerank-v3.5)	rag7[cohere]
"huggingface" / "hf"	HuggingFaceReranker	HF model name (default: cross-encoder/ms-marco-MiniLM-L-6-v2)	rag7[huggingface]
"jina"	JinaReranker	Jina model name (default: jina-reranker-v2-base-multilingual)	rag7[jina]
"llm"	LLMReranker	(uses the agent's LLM)	(none)
"rerankers"	RerankersReranker	Any model from the rerankers library	rag7[rerankers]
"embed-anything"	EmbedAnythingReranker	ONNX reranker model (default: jina-reranker-v1-turbo-en)	rag7[embed-anything]

# Cohere (default model)
rag = init_agent("docs", model="openai:gpt-5.4", reranker="cohere")

# HuggingFace — multilingual model
rag = init_agent("docs", model="openai:gpt-5.4", reranker="huggingface",
                 reranker_model="cross-encoder/mmarco-mMiniLMv2-L12-H384-v1")

# Jina
rag = init_agent("docs", model="openai:gpt-5.4", reranker="jina")  # uses JINA_API_KEY

# ColBERT via rerankers library
rag = init_agent("docs", model="openai:gpt-5.4", reranker="rerankers",
                 reranker_model="colbert-ir/colbertv2.0",
                 reranker_kwargs={"model_type": "colbert"})

# Pass a pre-built reranker instance directly
from rag7 import CohereReranker
rag = init_agent("docs", reranker=CohereReranker(model="rerank-v3.5", api_key="..."))

Model strings: any "provider:model-name" from LangChain's init_chat_model — openai, anthropic, azure_openai, google_vertexai, ollama, groq, mistralai, and more

Manual setup

from rag7 import Agent, InMemoryBackend

backend = InMemoryBackend(embed_fn=my_embed_fn)
backend.add_documents([
    {"content": "RAG combines retrieval with generation", "source": "wiki"},
    {"content": "Vector search finds similar embeddings", "source": "docs"},
])

rag = Agent(index="demo", backend=backend)

# Single query → full answer
state = rag.invoke("What is retrieval-augmented generation?")
print(state.answer)

# Retrieve only — documents without LLM answer
query, docs = rag.retrieve_documents("What is retrieval-augmented generation?")
for doc in docs:
    print(doc.page_content)

# Override top-K at call time
query, docs = rag.retrieve_documents("hybrid search", top_k=3)

Agent.from_model — model string with explicit backend

from rag7 import Agent, QdrantBackend

rag = Agent.from_model(
    "openai:gpt-5.4-mini",          # fast model for routing & rewriting
    index="docs",
    gen_model="openai:gpt-5.4",     # powerful model for the final answer
    backend=QdrantBackend("docs", url="http://localhost:6333"),
)

---

💬 Multi-turn Chat

from rag7 import Agent, ConversationTurn

rag = Agent(index="articles")
history: list[ConversationTurn] = []

state = rag.chat("What is hybrid search?", history)
history.append(ConversationTurn(question="What is hybrid search?", answer=state.answer))

state = rag.chat("How does it compare to pure vector search?", history)
print(state.answer)
print(f"Sources: {len(state.documents)}")

Async variant:

state = await rag.achat("What is hybrid search?", history)

---

🏗️ Architecture

rag7 has two operating modes — both fully autonomous:

Graph mode (rag.chat / rag.invoke)

The default. A LangGraph state machine that runs the full agentic pipeline:

Query
  │
  ├─[HyDE]──────────────────────────────────────────┐
  │  Hypothetical document embedding (parallel)      │
  │                                                  ▼
  ▼                                         [Embed HyDE text]
[Preprocess]                                         │
  Extract keywords + variants                        │
  Detect semantic_ratio + fusion strategy            │
  │                                                  │
  └──────────────────────────────────────────────────┘
                        │
                        ▼
              [Hybrid Search × N queries]
               BM25 + Vector, multi-arm
                        │
                        ▼
               [RRF / DBSF Fusion]
                        │
                        ▼
                    [Rerank]
               Cohere / HF / Jina / embed-anything / LLM
                        │
                        ▼
               [Quality Gate]
               LLM judges relevance
                   │         │
                (good)     (bad)
                   │         │
                   ▼         ▼
              [Generate]  [Rewrite] ──► loop (max_iter)
                   │
                   ▼
        Answer + [n] inline citations

Tool-calling agent mode (rag.invoke_agent)

The agent receives a set of tools and reasons step-by-step, calling them in whatever order makes sense for the question. No fixed pipeline — pure field improvisation:

Query
  │
  ▼
[LLM Agent]  ◄──────────────────────────────────────┐
  Thinks: "What do I need to answer this?"           │
  │                                                  │
  ├── get_index_settings()                           │
  │   Discover filterable / sortable / boost fields  │
  │                                                  │
  ├── get_filter_values(field)                       │
  │   Sample real stored values for a field          │
  │   → build precise filter expressions             │
  │                                                  │
  ├── search_hybrid(query, filter, sort_fields)      │
  │   BM25 + vector, optional filter + sort boost    │
  │                                                  │
  ├── search_bm25(query, filter)                     │
  │   Fallback pure keyword search                   │
  │                                                  │
  ├── rerank_results(query, hits)                    │
  │   Re-rank with configured reranker               │
  │                                                  │
  └── [needs more info?] ─────────────────────────► │

  [done]
  │
  ▼
Answer  (tool calls explained inline)

Use invoke_agent when questions involve dynamic filtering — the agent inspects the index schema, samples real field values, builds filters on the fly, and decides whether to sort by business signals like popularity or recency.

---

📚 Examples

1. Knowledge base Q&A (InMemory, no external services)

from rag7 import AgenticRAG, InMemoryBackend
from langchain_openai import ChatOpenAI

docs = [
    {"id": "1", "content": "The Eiffel Tower was built in 1889 for the World's Fair in Paris.", "topic": "history"},
    {"id": "2", "content": "The Louvre is the world's largest art museum, located in Paris.", "topic": "art"},
    {"id": "3", "content": "Photosynthesis converts sunlight and CO2 into glucose and oxygen.", "topic": "science"},
    {"id": "4", "content": "The Python programming language was created by Guido van Rossum in 1991.", "topic": "tech"},
    {"id": "5", "content": "Machine learning is a subset of artificial intelligence.", "topic": "tech"},
]

backend = InMemoryBackend(documents=docs)
llm = ChatOpenAI(model="gpt-5.4-mini")

rag = AgenticRAG(index="kb", backend=backend, llm=llm, gen_llm=llm)

state = rag.invoke("When was the Eiffel Tower built?")
print(state.answer)
# → "The Eiffel Tower was built in 1889 for the World's Fair in Paris. [1]"
print(state.query)        # rewritten query
print(state.iterations)   # how many retrieval rounds it took

---

2. Retrieve documents without generating an answer

Useful when you want the docs and will handle the answer yourself:

from rag7 import AgenticRAG, InMemoryBackend

rag = AgenticRAG(index="kb", backend=backend)

query, docs = rag.retrieve_documents("machine learning", top_k=3)
print(f"Rewritten query: {query}")
for doc in docs:
    print(doc.page_content)
    print(doc.metadata)  # original fields + _rankingScore

---

3. Multi-turn chat

from rag7 import AgenticRAG, InMemoryBackend, ConversationTurn

rag = AgenticRAG(index="kb", backend=backend, llm=llm, gen_llm=llm)
history: list[ConversationTurn] = []

q1 = "What is machine learning?"
s1 = rag.chat(q1, history)
history.append(ConversationTurn(question=q1, answer=s1.answer))
print(s1.answer)

q2 = "How does it relate to AI?"   # pronoun resolved from history
s2 = rag.chat(q2, history)
history.append(ConversationTurn(question=q2, answer=s2.answer))
print(s2.answer)

---

4. Always-on filter (e-commerce: in-stock items only)

from rag7 import AgenticRAG, MeilisearchBackend

backend = MeilisearchBackend(
    "products",
    url="http://localhost:7700",
    api_key="masterKey",
)

# Every search is scoped to in-stock items — no per-call boilerplate
rag = AgenticRAG(
    index="products",
    backend=backend,
    filter="is_in_stock = true",
    llm=llm,
    gen_llm=llm,
)

state = rag.invoke("red running shoes size 42")
for doc in state.documents:
    print(doc.metadata["product_name"], "|", doc.metadata["price"])

---

5. Filter + own-brand exclusion

# Exclude own-brand articles and search for third-party alternatives
rag = AgenticRAG(
    index="products",
    backend=backend,
    filter="is_own_brand = false",
    llm=llm,
    gen_llm=llm,
)

state = rag.invoke("Find alternatives to our house-brand brake cleaner 500ml")
print(state.answer)
# LLM strips the brand prefix, rewrites to "brake cleaner 500ml",
# filter ensures only third-party results are returned.

---

6. Async usage (FastAPI / Databricks / Jupyter)

import asyncio
from rag7 import AgenticRAG, InMemoryBackend

rag = AgenticRAG(index="kb", backend=backend, llm=llm, gen_llm=llm)

# Async single query
state = await rag.ainvoke("What is photosynthesis?")
print(state.answer)

# Async batch — runs all queries in parallel
states = await rag.abatch([
    "What is photosynthesis?",
    "Who created Python?",
    "Where is the Louvre?",
])
for s in states:
    print(s.answer)

Sync variants work from any context including Databricks/Jupyter (running event loop is handled automatically):

# Safe to call from a notebook cell even with a running event loop
state = rag.invoke("What is photosynthesis?")
states = rag.batch(["question one", "question two"])

---

7. Tool-calling agent — dynamic filter discovery

When you don't know the filter values upfront, the agent inspects the schema and samples field values itself:

from rag7 import AgenticRAG, MeilisearchBackend

rag = AgenticRAG(
    index="products",
    backend=MeilisearchBackend("products", url="http://localhost:7700"),
    llm=llm,
    gen_llm=llm,
)

# Agent calls get_index_settings() → get_filter_values("brand") →
# search_hybrid(filter="brand = 'Bosch'", sort_fields=["popularity"])
result = rag.invoke_agent("Show me the most popular Bosch power tools")
print(result)

---

8. Streaming the final answer

async def stream_answer():
    async for chunk in rag.astream("Explain hybrid search in simple terms"):
        print(chunk, end="", flush=True)

asyncio.run(stream_answer())

---

9. Qdrant — vector search with metadata filter

from rag7 import AgenticRAG, QdrantBackend
from qdrant_client import QdrantClient, models

# Insert docs (done once)
client = QdrantClient("http://localhost:6333")
client.upsert("articles", points=[
    models.PointStruct(id=1, vector=embed("RAG combines retrieval and generation"),
                       payload={"content": "RAG combines retrieval and generation", "year": 2023}),
    models.PointStruct(id=2, vector=embed("Vector databases store high-dimensional embeddings"),
                       payload={"content": "Vector databases store high-dimensional embeddings", "year": 2022}),
])

from qdrant_client.models import FieldCondition, MatchValue

rag = AgenticRAG(
    index="articles",
    backend=QdrantBackend("articles", url="http://localhost:6333", embed_fn=embed),
    llm=llm,
    gen_llm=llm,
)

# Pass native Qdrant filter dict — no string translation needed
state = rag.invoke("what is RAG?")
# Or with explicit filter at retrieve time:
_, docs = rag.retrieve_documents("vector databases")

---

10. Custom instructions (tone / domain)

rag = AgenticRAG(
    index="legal_docs",
    backend=backend,
    llm=llm,
    gen_llm=llm,
    instructions=(
        "You are a legal assistant. Answer in formal language. "
        "Always cite the article number when referencing a law. "
        "If the context is insufficient, say so explicitly."
    ),
)

state = rag.invoke("What are the notice periods for dismissal?")
print(state.answer)

---

🗄️ Backends

☁️ Azure AI Search

Native hybrid search — no client-side embeddings needed when the index has an integrated vectorizer:

from rag7 import Agent, AzureAISearchBackend

# Native vectorization — service embeds the query server-side
rag = Agent(
    index="my-index",
    backend=AzureAISearchBackend(
        "my-index",
        endpoint="https://my-search.search.windows.net",
        api_key="...",
    ),
)

# Client-side vectorization
rag = Agent(
    index="my-index",
    backend=AzureAISearchBackend(
        "my-index",
        endpoint="https://my-search.search.windows.net",
        api_key="...",
        embed_fn=my_embed_fn,
    ),
)

# With Azure semantic reranking
rag = Agent(
    index="my-index",
    backend=AzureAISearchBackend(
        "my-index",
        endpoint="https://my-search.search.windows.net",
        api_key="...",
        semantic_config="my-semantic-config",
    ),
)

🟡 Qdrant

from rag7 import Agent, QdrantBackend

rag = Agent(
    index="my_collection",
    backend=QdrantBackend("my_collection", url="http://localhost:6333", embed_fn=my_embed_fn),
)

🟣 ChromaDB

from rag7 import Agent, ChromaDBBackend

rag = Agent(
    index="my_collection",
    backend=ChromaDBBackend("my_collection", path="./chroma_db", embed_fn=my_embed_fn),
)

🏹 LanceDB

from rag7 import Agent, LanceDBBackend

rag = Agent(
    index="docs",
    backend=LanceDBBackend("docs", db_uri="./lancedb", embed_fn=my_embed_fn),
)

🐘 PostgreSQL + pgvector

from rag7 import Agent, PgvectorBackend

rag = Agent(
    index="documents",
    backend=PgvectorBackend(
        "documents",
        dsn="postgresql://user:pass@localhost:5432/mydb",
        embed_fn=my_embed_fn,
    ),
)

🦆 DuckDB

from rag7 import Agent, DuckDBBackend

rag = Agent(
    index="vectors",
    backend=DuckDBBackend("vectors", db_path="./my.duckdb", embed_fn=my_embed_fn),
)

🔎 Meilisearch

from rag7 import Agent, MeilisearchBackend

rag = Agent(
    index="articles",
    backend=MeilisearchBackend("articles", url="http://localhost:7700", api_key="masterKey"),
)

📦 InMemory (default, zero dependencies)

from rag7 import Agent, InMemoryBackend

backend = InMemoryBackend(embed_fn=my_embed_fn)
backend.add_documents([
    {"content": "RAG combines retrieval with generation", "source": "wiki"},
    {"content": "Vector search finds similar embeddings", "source": "docs"},
])

rag = Agent(index="demo", backend=backend)

---

🤖 LLM Configuration

Pass a pre-built LangChain model or use init_agent / Agent.from_model for string-based init.
When using Agent directly, configure via env vars or pass an explicit model instance.

OpenAI

from langchain_openai import ChatOpenAI
from rag7 import Agent

rag = Agent(
    index="articles",
    llm=ChatOpenAI(model="gpt-5.4", api_key="sk-..."),
    gen_llm=ChatOpenAI(model="gpt-5.4", api_key="sk-..."),
)

Azure OpenAI (explicit keys)

from langchain_openai import AzureChatOpenAI
from rag7 import Agent

llm = AzureChatOpenAI(
    azure_endpoint="https://my-resource.openai.azure.com",
    azure_deployment="gpt-5.4",
    api_key="...",
    api_version="2024-12-01-preview",
)
rag = Agent(index="articles", llm=llm, gen_llm=llm)

Azure OpenAI (env vars)

# Set: AZURE_OPENAI_ENDPOINT, AZURE_OPENAI_API_KEY, AZURE_OPENAI_DEPLOYMENT
from rag7 import Agent

rag = Agent(index="articles")  # auto-detected

Azure OpenAI with Managed Identity (no API key)

from azure.identity import DefaultAzureCredential, get_bearer_token_provider
from langchain_openai import AzureChatOpenAI
from rag7 import Agent

token_provider = get_bearer_token_provider(
    DefaultAzureCredential(), "https://cognitiveservices.azure.com/.default"
)
llm = AzureChatOpenAI(
    azure_endpoint="https://my-resource.openai.azure.com",
    azure_deployment="gpt-5.4",
    azure_ad_token_provider=token_provider,
    api_version="2024-12-01-preview",
)
rag = Agent(index="articles", llm=llm, gen_llm=llm)

Anthropic Claude

pip install langchain-anthropic

from langchain_anthropic import ChatAnthropic
from rag7 import Agent

llm = ChatAnthropic(model="claude-sonnet-4-6", api_key="sk-ant-...")
rag = Agent(index="articles", llm=llm, gen_llm=llm)

Ollama (local, no API key)

pip install langchain-ollama

from langchain_ollama import ChatOllama
from rag7 import Agent

rag = Agent(
    index="articles",
    llm=ChatOllama(model="llama3.2", base_url="http://localhost:11434"),
    gen_llm=ChatOllama(model="llama3.2", base_url="http://localhost:11434"),
)

Google Vertex AI

pip install langchain-google-vertexai

from langchain_google_vertexai import ChatVertexAI
from rag7 import Agent

llm = ChatVertexAI(model="gemini-2.0-flash", project="my-gcp-project", location="us-central1")
rag = Agent(index="articles", llm=llm, gen_llm=llm)

Separate fast and generation models

Use a cheap/fast model for query rewriting and routing, a powerful model for the final answer:

from langchain_openai import AzureChatOpenAI
from rag7 import Agent

fast_llm = AzureChatOpenAI(azure_deployment="gpt-5.4-mini", api_key="...", api_version="2024-12-01-preview")
gen_llm  = AzureChatOpenAI(azure_deployment="gpt-5.4",      api_key="...", api_version="2024-12-01-preview")

rag = Agent(index="articles", llm=fast_llm, gen_llm=gen_llm)

---

🏆 Rerankers

🏅 Cohere

from rag7 import Agent, CohereReranker

rag = Agent(index="articles", reranker=CohereReranker(model="rerank-v3.5", api_key="..."))

🤗 HuggingFace cross-encoder (local, no API key)

pip install rag7[huggingface]

from rag7 import Agent, HuggingFaceReranker

rag = Agent(index="articles", reranker=HuggingFaceReranker())

# Multilingual
rag = Agent(index="articles", reranker=HuggingFaceReranker(model="cross-encoder/mmarco-mMiniLMv2-L12-H384-v1"))

🌊 Jina (multilingual API)

pip install rag7[jina]

from rag7 import Agent, JinaReranker

rag = Agent(index="articles", reranker=JinaReranker(api_key="..."))  # or JINA_API_KEY env var

🎯 rerankers — ColBERT / Flashrank / RankGPT / any cross-encoder

Unified bridge to the rerankers library by answer.ai:

pip install rag7[rerankers]

from rag7 import Agent, RerankersReranker

rag = Agent(index="articles", reranker=RerankersReranker("cross-encoder/ms-marco-MiniLM-L-6-v2", model_type="cross-encoder"))
rag = Agent(index="articles", reranker=RerankersReranker("colbert-ir/colbertv2.0", model_type="colbert"))
rag = Agent(index="articles", reranker=RerankersReranker("flashrank", model_type="flashrank"))
rag = Agent(index="articles", reranker=RerankersReranker("gpt-5.4-mini", model_type="rankgpt", api_key="..."))

🦀 Embed-anything — Rust-accelerated local embeddings + reranking

"I never leave home without my gadgets, Q." — Embeddings and reranking in a single Rust-powered package. No API keys, no network calls, no asking permission. The silent operative in your stack. Powered by embed-anything.

pip install rag7[embed-anything]

from rag7 import Agent, EmbedAnythingEmbedder, EmbedAnythingReranker

# Local embeddings — works as embed_fn (callable)
embedder = EmbedAnythingEmbedder("sentence-transformers/all-MiniLM-L6-v2")

# Local reranker — implements Reranker protocol
reranker = EmbedAnythingReranker("jinaai/jina-reranker-v1-turbo-en")

rag = Agent(
    index="articles",
    backend=QdrantBackend("articles", url="http://localhost:6333", embed_fn=embedder),
    embed_fn=embedder,
    reranker=reranker,
)

Mix and match freely — use embed-anything for one piece and a cloud provider for the other:

from rag7 import Agent, EmbedAnythingEmbedder, CohereReranker

# Local embeddings + cloud reranker
rag = Agent(index="docs", embed_fn=EmbedAnythingEmbedder(), reranker=CohereReranker())

# Cloud embeddings + local reranker
from rag7 import EmbedAnythingReranker
rag = Agent(index="docs", embed_fn=azure_embed_fn, reranker=EmbedAnythingReranker())

🔧 Custom reranker

from rag7 import Agent, RerankResult

class MyReranker:
    def rerank(self, query: str, documents: list[str], top_n: int) -> list[RerankResult]:
        return [RerankResult(index=i, relevance_score=1.0 / (i + 1)) for i in range(top_n)]

rag = Agent(index="articles", reranker=MyReranker())

---

🛠️ Tools

When using invoke_agent, the LLM has access to a set of tools it can call in any order. No fixed pipeline — the agent decides what it needs.

Tool	Description
get_index_settings()	Discover filterable, searchable, sortable, and boost fields from the index schema
get_filter_values(field)	Sample real stored values for a field — used to build precise filter expressions
search_hybrid(query, filter_expr, semantic_ratio, sort_fields)	BM25 + vector hybrid search with optional filter and sort boost
search_bm25(query, filter_expr)	Pure keyword search — fallback when hybrid returns poor results
rerank_results(query, hits)	Re-rank a list of hits with the configured reranker

The agent follows this reasoning pattern:

1. Call get_index_settings() to learn the schema
2. If the question names a specific entity, call get_filter_values(field) to find the exact stored value
3. Call search_hybrid() with a filter and/or sort if relevant, otherwise broad hybrid search
4. Fall back to search_bm25() if results are thin
5. Call rerank_results() to surface the most relevant hits
6. Summarise — explaining which filters and signals influenced the answer

from rag7 import Agent

rag = Agent(index="products")

# Agent inspects schema, detects brand field, samples values,
# builds filter, sorts by popularity signal — all autonomously
result = rag.invoke_agent("Show me the most popular Bosch power tools")
print(result)

---

⚙️ Constructor Reference

Agent(
    index="my_index",           # collection / index name
    backend=...,                # SearchBackend (default: InMemoryBackend)
    llm=...,                    # fast LLM — routing, rewrite, filter
    gen_llm=...,                # generation LLM — final answer
    reranker=...,               # Cohere / HuggingFace / Jina / custom
    top_k=10,                   # final result count            [RAG_TOP_K]
    rerank_top_n=5,             # reranker top-n                [RAG_RERANK_TOP_N]
    retrieval_factor=4,         # over-retrieval multiplier     [RAG_RETRIEVAL_FACTOR]
    max_iter=20,                # max retrieve-rewrite cycles   [RAG_MAX_ITER]
    semantic_ratio=0.5,         # hybrid semantic weight        [RAG_SEMANTIC_RATIO]
    fusion="rrf",               # "rrf" or "dbsf"               [RAG_FUSION]
    instructions="",            # extra system prompt for generation
    embed_fn=None,              # (str) -> list[float]
    boost_fn=None,              # (doc_dict) -> float score boost
    filter=None,                # always-on Meilisearch filter expr (e.g. "brand = 'Bosch'")
    category_fields=None,       # fields used by alternative retrieve (None → auto-detect via regex)
    hyde_min_words=8,           # min words to trigger HyDE     [RAG_HYDE_MIN_WORDS]
    hyde_style_hint="",         # style hint for HyDE prompt
    auto_strategy=True,         # auto-tune from index samples
)

🔒 Always-on filter

Pin every search to a subset of the index with filter — Meilisearch syntax, AND-joined with any per-call filter (intent, language, ...):

rag = init_agent("products", filter="brand = 'Bosch'")
# every BM25 + vector + hybrid search scoped to Bosch only

The legacy base_filter kwarg still works but emits a DeprecationWarning — migrate to filter at your convenience.

🏷️ Category fields (alternative retrieve)

The alternative-retrieve fallback broadens the search by pivoting on category-like fields (product groups, taxonomy levels, sections, ...). By default, rag7 auto-detects them from the index schema via regex — matching names like category, product_group_l3, article_group_name, kategorie, family, section, ... — and prioritises deeper taxonomy levels (_l3 > _l2 > _l1).

Override explicitly when your schema uses unusual names:

rag = init_agent(
    "products",
    category_fields=["taxonomy_leaf", "taxonomy_parent", "department"],
)

Pass category_fields=[] to disable the fallback entirely.

---

📡 API Reference

Method	Returns	Description
rag.invoke(query)	RAGState	Full RAG pipeline (sync)
rag.ainvoke(query)	RAGState	Full RAG pipeline (async)
rag.chat(query, history)	RAGState	Multi-turn chat (sync)
rag.achat(query, history)	RAGState	Multi-turn chat (async)
rag.retrieve_documents(query, top_k)	(str, list[Document])	Retrieve only, no answer
rag.query(query)	str	Answer string directly
rag.invoke_agent(query)	str	Tool-calling agent mode (sync)
rag.ainvoke_agent(query)	str	Tool-calling agent mode (async)

RAGState fields: answer · documents · query · question · history · iterations

---

🌍 Environment Variables

Variable	Description	Default
AZURE_OPENAI_ENDPOINT	Azure OpenAI endpoint	—
AZURE_OPENAI_API_KEY	Azure OpenAI API key	—
AZURE_OPENAI_DEPLOYMENT	Default deployment	—
AZURE_OPENAI_FAST_DEPLOYMENT	Fast model deployment	→ DEPLOYMENT
AZURE_OPENAI_GENERATION_DEPLOYMENT	Generation deployment	→ DEPLOYMENT
AZURE_OPENAI_API_VERSION	API version	2024-12-01-preview
OPENAI_API_KEY	OpenAI API key (fallback)	—
OPENAI_MODEL	OpenAI model name	gpt-5.4
AZURE_COHERE_ENDPOINT	Azure Cohere endpoint	—
AZURE_COHERE_API_KEY	Azure Cohere API key	—
COHERE_API_KEY	Cohere API key (fallback)	—
JINA_API_KEY	Jina reranker API key	—
MEILI_URL	Meilisearch URL	http://localhost:7700
MEILI_KEY	Meilisearch API key	masterKey
RAG_TOP_K	Final result count	10
RAG_RERANK_TOP_N	Reranker top-n	5
RAG_RETRIEVAL_FACTOR	Over-retrieval multiplier	4
RAG_SEMANTIC_RATIO	Hybrid semantic weight	0.5
RAG_FUSION	Fusion strategy	rrf
RAG_HYDE_MIN_WORDS	Min words to trigger HyDE	8

---

🎯 Tune It For Your Data

"Q-Branch fits the gadget to the agent, not the other way around."

rag7 ships with curated tuned defaults in [tool.rag7] of pyproject.toml, found by running the built-in tuner against real German/Swiss product catalog data. These are better than hand-picked defaults for most retrieval tasks.

For peak performance on your corpus (product vs. legal vs. support vs. scientific), run the tuner yourself — it searches 20+ knobs with Optuna TPE sampler and usually beats defaults by 3–10% combined score (hit@5 + paraphrase consistency).

Real benchmark (Meilisearch cloud, 3 German product-catalog indexes, 39 hit cases + 8 paraphrase groups):

Config	hit@5	consistency	stable_top1	combined
Library defaults	0.903	0.750	0.250	0.727
Shipped tuned ([tool.rag7])	0.968	0.792	0.250	0.761
Full corpus-tuned (local)	0.968	0.792	0.375	0.761

combined = hit@5×0.4 + consistency×0.35 + stable_top1×0.25

📘 Full walkthrough: docs/auto-tuning.md — testset design, CLI and Python API, every searched parameter, result interpretation, troubleshooting.

1. Install

pip install 'rag7[tune]'

2. Write a testset

A list of (query, expected_doc_ids, id_field) tuples — or a JSON file:

[
  {"query": "Makita Akku Bohrhammer 18V", "expected_ids": ["SKU-1065144"], "id_field": "sku"},
  {"query": "Bosch Winkelschleifer 125mm", "expected_ids": ["SKU-1057802"], "id_field": "sku"}
]

3. Run the tuner

CLI (fastest path):

python -m rag7.tuner \
  --index my_index \
  --hits testset.json \
  --trials 50 \
  --patience 8         # early-stop if 8 trials show no improvement

Use --pyproject to write to pyproject.toml [tool.rag7] instead of the gitignored rag7.config.toml.

Python API (full control):

from rag7 import MeilisearchBackend, RAGConfig
from rag7.tuner import RAGTuner, load_testset
from rag7.utils import _make_azure_embed_fn

tuner = RAGTuner(
    backend_factory=lambda: MeilisearchBackend(index="my_index"),
    embed_fn=_make_azure_embed_fn(),
    hit_cases=load_testset("testset.json"),
    eval_k=5,
    # Optional: let the tuner mix/match weak + thinking models across
    # cost tiers (gen_llm / strong_model stays fixed — quality-critical).
    candidate_models=["azure:gpt-5.4-mini", "azure:gpt-5.4-nano"],
)

best = tuner.tune(
    n_trials=50,
    patience=8,             # early-stop on plateau
    trial_timeout_s=120,    # hung trials score 0, never block the study
)
best.save_toml("rag7.config.toml")   # gitignored — local override (recommended)
# or: best.save_pyproject()          # [tool.rag7] — commit if your team shares tuning

4. Use the tuned config

No code change required — AgenticRAG picks up [tool.rag7] automatically:

from rag7 import AgenticRAG, RAGConfig, MeilisearchBackend

rag = AgenticRAG(
    index="my_index",
    backend=MeilisearchBackend("my_index"),
    embed_fn=embed_fn,
    config=RAGConfig.auto(),   # discovers pyproject.toml → rag7.config.toml → env
)

Config discovery order

1. Runtime kwarg — AgenticRAG(config=RAGConfig(...))
2. rag7.config.toml — per-deployment local override. Gitignored by default so your corpus-specific tuning doesn't leak into source control. Wins over pyproject defaults — drop a tuned file here and you're done.
3. [tool.rag7] in pyproject.toml — shipped / shared defaults. rag7 ships with curated values here (tuned on real product-catalog data). Matches ruff/black/mypy convention for committed tool config.
4. RAG_* env vars — containers/CI overrides.
5. Library defaults — fallback if nothing else is set.

What gets tuned

Scalar thresholds:

Parameter	Range	Effect
retrieval_factor	2–8	Over-retrieve multiplier before reranking
rerank_top_n	3–10	Docs kept post-rerank
rerank_cap_multiplier	1.5–4	Caps reranker input at top_k × m
semantic_ratio	0.3–0.9	BM25 ⇄ vector balance
fusion	rrf / dbsf	Score fusion strategy
short_query_threshold	3–8	When to skip LLM preprocessing
short_query_sort_tokens	bool	Sort tokens for paraphrase invariance
bm25_fallback_semantic_ratio	0.7–1.0	Semantic ratio used when BM25 fails
rerank_skip_gap	0.05–0.3	Top-1 vs top-5 score gap to skip reranker
name_field_boost_max	0.0–0.5	Post-rerank boost for docs matching query tokens in name_field. Higher → precise lookups win; lower → paraphrase stability.

Optional (None = disable stage, first-class tuning option):

Parameter	Range / None	Effect
bm25_fallback_threshold	0.2–0.6 / None	BM25 score below which we boost semantic. None = never boost.
fast_accept_score	0.5–0.95 / None	BM25 score to accept fast path. None = always slow path.
fast_accept_confidence	0.6–0.95 / None	LLM confidence to accept fast path. None = no LLM confirm.
rerank_skip_dominance	0.6–0.95 / None	Score to skip reranker on obvious hits. None = always rerank.
expert_threshold	0.05–0.3 / None	Gap to escalate to expert reranker. None = never escalate.
hyde_min_words	2–20 / None	Min words to trigger HyDE. None = disable HyDE.

Pipeline-stage toggles:

Parameter	Default	Effect
enable_hyde	true	Hypothetical-document expansion
enable_filter_intent	true	LLM detects filter intent from query
enable_quality_gate	true	LLM judges retrieval quality before answering
enable_preprocess_llm	true	LLM query rewrite + variant generation
enable_reasoning	true	Per-document relevance reasoning (uses thinking_model)

LLM tiers (cost ⇄ quality, mix and match):

Parameter	Role	Typical cheap pick
strong_model	Final cited answer — gen_llm	azure:gpt-5.4
weak_model	Preprocess / quality / filter-intent / rewrite	azure:gpt-5.4-mini
thinking_model	Per-document reasoning when enable_reasoning=true	azure:gpt-5.4-mini

Specs are provider:model — resolved via LangChain's init_chat_model, so every supported provider works (azure:, openai:, anthropic:, bedrock:, ollama:, etc.). None = inherit from env vars.

Optuna's TPE sampler learns from prior trials — 50 trials usually beats hand-tuning. The tuner explores disabling each optional stage as a first-class hypothesis, so it can discover e.g. "your corpus doesn't need filter-intent detection." Use a cheap LLM (gpt-4o-mini) during tuning to keep cost down; swap to production LLM afterwards.

Disabling stages in TOML

TOML has no null, so disabled fields go in a disable list:

[tool.rag7]
top_k = 10
semantic_ratio = 0.5
# disable these optional stages for this corpus:
disable = ["bm25_fallback_threshold", "expert_threshold"]

RAGConfig.from_toml() / from_pyproject() translates disable = [...] into None values on load.

---

🖥️ CLI

"The gadgets are ready."

pip install rag7[recommended]

# 🧙 Guided setup wizard — choose LLM, embedder, backend, reranker
rag7

# 💬 Chat mode — full agentic pipeline
rag7 --chat -c my_index

# 🔍 Retriever mode — documents only, no LLM
rag7 --retriever -c my_index

# ⚡ Skip wizard, use env vars
rag7 --skip-wizard -c my_index

The wizard guides you through:

1. LLM provider — OpenAI, Anthropic, Ollama, or env default
2. Embedding model — OpenAI, Azure OpenAI, Ollama, or none (BM25 only)
3. Vector store — InMemory, Meilisearch, ChromaDB, Qdrant, pgvector, DuckDB, LanceDB, Azure AI Search
4. Reranker — Cohere, Jina, HuggingFace, LLM-based, or none
5. Mode — Chat (with answers) or Retriever (documents only)

---

📄 License

MIT — Licence to code.