hummbl-kernel

HUMMBL orchestration kernel — lightweight workflow execution with security and compliance enforcement.

Overview

The Mission Mode Kernel is a lightweight orchestration layer that combines Conductor-style deterministic YAML workflow execution with security and compliance enforcement for SOC 2, ISO 27001, and PCI frameworks.

Design Principles

1. Lightweight Architecture

• Minimal Dependencies: Stdlib-only Python (no third-party runtime dependencies)
• Single Responsibility: Kernel handles orchestration, security, and compliance only
• No Heavy Runtime: No built-in LLM inference or complex ML models
• Fast Startup: Sub-second initialization time
• Low Memory Footprint: < 100MB memory usage at idle

2. Security First

• Capability Admission Policy: All capabilities must be admitted before execution
• Risk-Based Enforcement: High-risk capabilities require explicit approval
• Least Privilege: Agents only get capabilities they need for their task
• Audit Trail: All security decisions logged to immutable audit trail
• Secret Protection: No secrets in logs or audit events

3. Compliance Native

• Framework Mapping: Native support for SOC 2, ISO 27001, PCI controls
• Evidence Validation: Automatic evidence quality and provenance validation
• Chain of Custody: Immutable evidence chain with cryptographic signatures
• Audit Report Generation: Automated compliance report generation
• Checkpoint Enforcement: Mandatory approval points for critical operations

4. Fleet Aware

• Hybrid Deployment: Seamless coordination between user-supplied compute nodes
• Health Monitoring: Continuous fleet health monitoring
• Automatic Fallback: Automatic task rerouting on node failure
• Resource Awareness: Task routing based on hardware capabilities

Architecture

Components

• Workflow Orchestrator (Conductor): YAML workflow parsing and validation, step execution and state management
• Capability Admission Policy: Capability registration and validation, risk-based admission decisions
• Security Enforcement Layer: Grant generation and validation, capability escalation prevention
• Compliance Enforcement Layer: Control mapping and validation, evidence quality checks
• Audit Trail System: Immutable event logging, evidence chain of custody
• Fleet Coordination Layer: Health monitoring, task routing and fallback
• Adapter Interface: Adapter manifest validation, admitted call envelope

Quick Start

import asyncio
import json
from hummbl_kernel import MissionModeKernel

# Initialize kernel
kernel = MissionModeKernel()

# Define workflow
example_workflow = {
    "name": "example_workflow",
    "intent": "Collect and assess compliance evidence",
    "success_criteria": ["All controls documented"],
    "workflow": [
        {
            "step": "collect_evidence",
            "agent": "evidence_collector",
            "outputs": {"evidence_refs": ["ev_001", "ev_002"]}
        }
    ]
}

# Execute workflow
async def main():
    receipt = await kernel.execute_workflow(
        workflow_yaml=json.dumps(example_workflow),
        inputs={
            "audit_period_start": "2025-01-01T00:00:00Z",
            "audit_period_end": "2025-12-31T23:59:59Z",
            "organization_id": "org_001"
        }
    )
    print(f"Mission completed: {receipt.receipt_id}")
    print(f"Audit trail: {receipt.audit_trail_ref}")

asyncio.run(main())

Documentation

• hummbl_kernel/audit/audit_trail_system.md — Audit trail architecture
• hummbl_kernel/audit/checkpoint_system.md — Checkpoint enforcement
• hummbl_kernel/adapters/adapter_interface.md — Adapter interface specification
• hummbl_kernel/workflows/schema.md — Workflow YAML schema
• hummbl_kernel/security/ — Capability admission policy

License

Apache-2.0 — see LICENSE.