Quesen — CrewAI Tool

Deterministic Agent Firewall + A2A risk validation as CrewAI BaseTools. Drop it on any Agent, any Crew.

Status: v0.3.0 · tracks Quesen engine v1.10.0 (TSC v2 firewall) · requires quesen-sdk>=0.4.1. Developer portal: https://senueren.co.za/quesen · Source: https://github.com/Shxnque/quesen

Agent Firewall (no signup)

from quesen_crewai import QuesenFirewallTool

firewall = QuesenFirewallTool(
    base_url="https://web-production-3df26.up.railway.app", sandbox=True,
)
# Attach to any CrewAI Agent's tools=[...]; deterministic PASS/REVIEW/BLOCK/SKIP.

Install

pip install quesen-crewai
# or:
pip install git+https://github.com/Shxnque/quesen-crewai.git

30-second usage

from crewai import Agent, Task, Crew
from quesen_crewai import QuesenValidateTool, QuesenReportTool

defender = Agent(
    role="Risk Officer",
    goal="Prevent the trading agent from touching rugpulls.",
    backstory="You block any action that Quesen labels SKIP.",
    tools=[QuesenValidateTool(base_url="https://<your-quesen>", api_key="sk_live_abc")],
)

check = Task(
    description="Validate this opportunity: domain_age_days=1, engagement_ratio=0.95, scam_keyword_count=4",
    agent=defender,
    expected_output="A PROCEED / REVIEW / SKIP decision with risk_score and conflict_triggers.",
)

crew = Crew(agents=[defender], tasks=[check])
print(crew.kickoff())

Receipt provenance (v1.10)

Calling QuesenValidateTool._run(...) returns the raw response dict from the underlying quesen-sdk client. Against a v1.10.0+ engine that dict includes:

• input_snapshot_hash — SHA-256 over canonical request JSON.
• commit_sha — git SHA of the ruleset live at decision time (or "unknown").

Both flow through untouched for CrewAI callers to log or verify. See the public API reference for the contract.

Tools shipped

• QuesenValidateTool — wraps /validate
• QuesenSimulateTool — wraps /simulate
• QuesenReportTool — wraps /report (v1.1 schema)

MIT license. See senueren.co.za/quesen for canonical documentation.