haiku.rag/docs/tools.md

Tools & Skills

haiku.rag exposes its RAG capabilities through a haiku.skills skill. The skill provides tools for search, Q&A, analysis, and research that can be composed into any pydantic-ai agent via SkillToolset.

For lower-level access, haiku.rag.tools provides individual FunctionToolset factories used internally by agents.

RAG Skill

The RAG skill is the primary way to use haiku.rag tools. It bundles all capabilities into a single skill with managed state.

from haiku.rag.skills.rag import create_skill
from haiku.skills.agent import SkillToolset
from pydantic_ai import Agent

skill = create_skill(db_path=db_path, config=config)
toolset = SkillToolset(skills=[skill])

agent = Agent(
    "openai:gpt-4o",
    instructions=toolset.system_prompt,
    toolsets=[toolset],
)

result = await agent.run("What documents do we have?")

create_skill(db_path?, config?)

Creates a RAG skill instance.

Parameter	Default	Description
db_path	None	Path to LanceDB database. Falls back to HAIKU_RAG_DB env var, then config default.
config	None	AppConfig instance. If None, uses get_config().

Tools

Tool	Purpose
search(query, limit?)	Hybrid search (vector + full-text) with context expansion
list_documents(limit?, offset?, filter?)	Paginated document listing
get_document(query)	Retrieve a document by ID, title, or URI
ask(question)	Q&A with citations via the QA agent
analyze(question, document?, filter?)	Computational analysis via code execution (requires Docker)
research(question)	Deep multi-agent research producing comprehensive reports

State

The skill manages a RAGState under the "rag" namespace:

class RAGState(BaseModel):
    citations: list[Any] = []
    qa_history: list[QAHistoryEntry] = []
    document_filter: str | None = None
    searches: dict[str, list[SearchResult]] = {}
    documents: list[DocumentInfo] = []
    reports: list[ResearchEntry] = []

State is automatically synced via the AG-UI protocol when using AGUIAdapter. Access it programmatically:

rag_state = toolset.get_namespace("rag")
if rag_state:
    print(f"Citations: {len(rag_state.citations)}")
    print(f"Q&A history: {len(rag_state.qa_history)}")

AG-UI Streaming

For web applications, use pydantic-ai's AGUIAdapter to stream tool calls, text, and state deltas:

from pydantic_ai.ag_ui import AGUIAdapter

adapter = AGUIAdapter(agent=agent, run_input=run_input)
event_stream = adapter.run_stream()
sse_event_stream = adapter.encode_stream(event_stream)

See the Web Application for a complete implementation.

Low-Level Toolsets

For advanced use cases, individual toolset factories are available in haiku.rag.tools. These are used internally by the QA agent and can be composed into custom agents.

RAGDeps Protocol

All toolsets use the RAGDeps protocol for dependency injection:

from haiku.rag.tools import RAGDeps

class MyDeps:
    def __init__(self, client: HaikuRAG):
        self.client = client

Search Toolset

create_search_toolset() provides hybrid search with context expansion.

from haiku.rag.tools import create_search_toolset

search = create_search_toolset(config)

Parameter	Default	Description
config	required	AppConfig
expand_context	True	Expand results with surrounding chunks
base_filter	None	SQL WHERE clause applied to all searches
tool_name	"search"	Name of the tool exposed to the agent
on_results	None	Callback (list[SearchResult]) -> None invoked with results

Document Toolset

create_document_toolset() provides document browsing and retrieval.

from haiku.rag.tools import create_document_toolset

docs = create_document_toolset(config)

Parameter	Default	Description
config	required	AppConfig
base_filter	None	SQL WHERE clause for list operations

Tools:

• list_documents(page?) — Paginated document listing (50 per page).
• get_document(query) — Retrieve a document by title or URI.
• summarize_document(query) — Generate an LLM summary of a document's content.

Analysis Toolset

create_analysis_toolset() provides computational analysis via the RLM agent (Docker sandbox).

from haiku.rag.tools import create_analysis_toolset

analysis = create_analysis_toolset(config)

Parameter	Default	Description
config	required	AppConfig
base_filter	None	SQL WHERE clause applied to searches
tool_name	"analyze"	Name of the tool exposed to the agent

Filter Helpers

haiku.rag.tools.filters provides utilities for building SQL filters:

• build_document_filter(document_name) — Builds a LIKE filter matching against both uri and title, case-insensitive. Also matches without spaces (e.g., "TB MED 593" matches "tbmed593").
• build_multi_document_filter(document_names) — Combines multiple document name filters with OR logic.
• combine_filters(filter1, filter2) — Combines two filters with AND logic. Returns None if both are None.