Semantica × CrewAI

First-class integration between Semantica and CrewAI — give your crews a shared semantic knowledge graph, decision intelligence, and graph-based retrieval.

Installation

pip install "crewai>=0.80.0"

Installed separately from semantica. If crewai is not installed, the integration still imports (classes degrade gracefully), but you can't pass the objects to a Crew.

⚠️ Security note: crewai hard-requires chromadb~=1.1.0, which is currently affected by multiple unpatched advisories — a pre-authentication code-injection CVE-2026-45829, authenticated code injection CVE-2026-45833, and two cross-tenant authorization gaps CVE-2026-45830/45831 (no fixed release exists — even the latest chromadb 1.5.9 is affected). Because of this, semantica does not offer a [crewai] extra and never installs crewai/chromadb transitively — install crewai yourself only where you actually use CrewAI, and re-evaluate once chromadb ships a fix.

1. SemanticaKGTool

A BaseTool that lets agents build and query a shared ContextGraph mid-reasoning:

• extract_entities — extract named entities from text
• extract_relations — extract relationships from text
• add_to_graph — extract entities/relations from text and add them to the shared graph
• query_graph — keyword-search the graph using query
• find_related — find concepts related to entity within hops

from crewai import Agent, Crew, Task
from semantica.context import ContextGraph
from integrations.crewai import SemanticaKGTool

graph = ContextGraph()

analyst = Agent(
    role="Knowledge Analyst",
    goal="Build and explore a knowledge graph from documents",
    backstory="You map entities and relationships into a shared graph.",
    tools=[SemanticaKGTool(graph=graph)],
)

crew = Crew(
    agents=[analyst],
    tasks=[Task(description="Extract and link key entities from the brief", expected_output="JSON", agent=analyst)],
)
result = crew.kickoff()

All actions return JSON, so agents get parseable results.

2. SemanticaDecisionTool

A BaseTool that wraps AgentContext and exposes decision intelligence:

• record_decision — record a decision with reasoning and outcome
• find_precedents — retrieve past decisions similar to a scenario
• trace_causal_chain — trace the causal chain from a decision
• analyze_impact — assess downstream influence using graph centrality
• check_policy — validate a proposed decision against rule-based policies

from crewai import Agent, Crew, Task
from integrations.crewai import SemanticaDecisionTool

planner = Agent(
    role="Decision Planner",
    goal="Make grounded, precedented decisions",
    backstory="You record decisions and validate them against policy.",
    tools=[SemanticaDecisionTool()],
)

crew = Crew(agents=[planner], tasks=[...])

When no AgentContext is passed, one is created in-memory with decision_tracking=True.

3. SemanticaKnowledgeSource

A BaseKnowledgeSource that serializes the current state of a ContextGraph (nodes, edges, metadata) into CrewAI's knowledge storage, giving every agent in the crew retrieval access to the graph:

from crewai import Agent, Crew, Task
from semantica.context import ContextGraph
from integrations.crewai import SemanticaKnowledgeSource

graph = ContextGraph()
graph.add_node(node_id="privacy", node_type="policy", content="...")

researcher = Agent(
    role="Policy Researcher",
    goal="Answer questions from the knowledge base",
    backstory="You retrieve from graph knowledge to answer accurately.",
)

crew = Crew(
    agents=[researcher],
    tasks=[...],
    knowledge_sources=[SemanticaKnowledgeSource(graph=graph)],
)

Embedder required: storing chunks goes through CrewAI's knowledge pipeline, which needs an embedder. Set Crew(embedder=...) (or provide CrewAI's default credentials, e.g. OPENAI_API_KEY). Without a working embedder, storage fails, an ERROR is logged, and agents retrieve nothing — the crew still runs with empty knowledge queries.

Compatibility note

CrewAI's BaseKnowledgeSource contract changed between 0.80.x and current releases (load_content() → validate_content()/aadd()). SemanticaKnowledgeSource implements both the legacy and current methods, so it works across crewai>=0.80.0.

Sharing state & checkpoints

• Each tool/source holds whatever graph/context you pass it. When omitted, a fresh in-memory object is created and a warning is logged — instances that auto-create their own state do not share knowledge, so pass the same object to every agent that must share.
• Live state (ContextGraph, AgentContext, extractors) is excluded from CrewAI's JSON serialization. After restoring from a checkpoint, re-attach the live graph/context to the restored objects.