nanoathens 0.1.3

Declarative DataFlow Agent SDK — schema-driven, collision-free agent framework

nanoathens — Declarative DataFlow Agent SDK

A schema-driven, collision-free agent framework where LLMs extract values (not plans) and a static DAG resolves deterministic execution paths.

Install

pip install nanoathens                     # Core SDK only (no GPU deps)
pip install nanoathens[medgemma]           # + MedGemma support
pip install nanoathens[all]                # Everything

Or install from source:

pip install -e .

Quick Start

from nanoathens import (
    ToolRegistry, ToolSchema, ToolType, ArgExtractorType,
    DeclarativeDataFlowAgent, run_medgemma, load_medgemma,
)

# 1. Build your tool registry
registry = ToolRegistry()
registry.register(
    name="my_tool",
    description="Does something useful",
    tool_type=ToolType.COMPUTATION,
    arg_sources={"input_val": "user_input"},
    arg_extractor={"name": "my_tool", "arguments": {"input_val": {"type": ArgExtractorType.LLM}}},
    func=lambda input_val: f"Result for {input_val}",
    output_keys={"output_val": "string"},
)

# 2. Create the agent
agent = DeclarativeDataFlowAgent(
    registry=registry,
    reasoning_caller=run_medgemma,  # Uses stub if MedGemma not loaded
)

# 3. Run
import asyncio
result = asyncio.run(agent.run("Process my input", target_key="output_val"))
print(result["response"])

Architecture

User Query
    │
    ▼
┌─────────────────────┐
│  LLMValueExtractor   │  ← Extract values from query
│  ContextBank         │  ← Accumulate context
└─────────┬───────────┘
          ▼
┌─────────────────────┐
│  GoalKeyResolver     │  ← Map query → target key
└─────────┬───────────┘
          ▼
┌─────────────────────┐
│  DataFlowEngine      │  ← Resolve DAG path
│  (collision-free)    │  ← Backward DFS
└─────────┬───────────┘
          ▼
┌─────────────────────┐
│  GroundedArgFiller   │  ← Fill args from context
│  Tool Execution      │  ← Run each tool in order
└─────────┬───────────┘
          ▼
┌─────────────────────┐
│  Synthesis           │  ← LLM summarizes results
└─────────────────────┘

Key Properties

• Collision-free DAG: No output key appears in any tool's input sources
• Deterministic: Same query always produces same execution plan
• Minimum LLM calls: 2 (extraction + goal resolution) + 1 per tool for arg filling
• Explicit null_plan: Returns registry gap information if no path exists
• Domain-agnostic: Works for any domain (oncology, radiology, etc.)

Modules

Module	Classes
core	ToolType, ArgExtractorType, ToolSchema, ToolRegistry
context	ContextBank, LLMValueExtractor, BaseValueExtractor
filler	GroundedArgumentFiller
engine	DataFlowEngine
resolver	GoalKeyResolver
agent	DeclarativeDataFlowAgent, ConfigurableOrchestrator
session	SessionStore, SESSION_STORE
inference	run_medgemma, load_medgemma, set_pipeline
retriever	BM25ToolRetriever