Coherence SRE // Variance Sentinel

STATUS: ACTIVE | COMPLIANCE: ISO 9001:2015 ALIGNED | CAGE: 17TJ5

This software is architected and maintained under the Blackglass Continuum Quality Management System. See Governance Standards for compliance details.

Mission Assurance for High-Entropy Infrastructure

Operator: Blackglass Continuum LLC
Federal Registration: CAGE Code 17TJ5 · UEI SVZVXPTM9AF4
Status: U.S. Federally Registered Entity · Government-Eligible Contractor

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Executive Summary

Coherence SRE is a read-only site reliability analysis framework for high-variance, mission-critical environments.

Rather than relying on static thresholds or trained models, Coherence evaluates second-order changes in system telemetry — variance, rate-of-change, and amplification — to identify early indicators of instability that precede service degradation.

The framework is designed for deterministic behavior, reproducible analysis, and safe deployment in air-gapped or regulated infrastructure.

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Core Methodology: Second-Order Stability Signals

1. System Jitter (CPU Variance):
   • Metric: CPU Variance ($\sigma^2$)
   • Interpretation: Elevated variance under nominal load indicates execution instability such as contention or deadlock precursors.
2. Exergy Efficiency (Resource Leaks):
   • Metric: Memory Allocation Velocity (MB/s)
   • Interpretation: Positive first derivative indicates resource saturation trends independent of total capacity.
3. Amplification Ratio (Retry Storms):
   • Metric: Egress/Ingress Packet Ratio
   • Interpretation: Ratio > 1:1 indicates internal retry amplification or fan-out anomalies.

Compliance & Security Posture

This framework adheres to NIST SP 800-190 (Application Container Security) by operating exclusively as a read-only sidecar with no control-plane access, no external write privileges, and no automated remediation capabilities.

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System Architecture

The architecture prioritizes "Physics over ML," ensuring deterministic behavior even under extreme load.

graph TD
    classDef secure fill:#0b0c10,stroke:#66fcf1,stroke-width:2px,color:#fff;
    classDef logic fill:#1f2833,stroke:#c5c6c7,stroke-width:1px,color:#fff;

    A[Telemetry Source] -->|Raw Metrics| B(Ingestion Layer);
    B -->|Normalized| C{Variance Engine};
    
    subgraph "Sovereign Core"
        C -->|Rolling Window| D[Physics Engine];
        D -->|StdDev Calculation| E[Threshold Logic];
    end
    
    E -->|Signal > 2.0σ| F[VETO SIGNAL];
    E -->|Stream| G[Glass Cockpit];
    
    class A,B,G logic;
    class C,D,E,F secure;

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Non-Goals

Coherence SRE does not:

• Perform automated remediation
• Modify production systems
• Train or adapt machine learning models
• Require privileged control-plane access

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Operational Deployment

1. The Glass Cockpit (Command Interface)

The "Overwatch" dashboard provides real-time visualization of system variance vectors.

pip install ".[dashboard]"
streamlit run src/coherence/ui/webapp.py

2. The Sentinel (Sidecar Mode)

Runs as a lightweight, headless process for production environments.

# Docker Deployment
docker run -d --name coherence-sentinel \
  --read-only \
  --tmpfs /tmp \
  coherence-sre:latest --source datadog

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Provenance & Attribution

This repository is anchored by a permanent DOI. All derivative works must cite the original provenance.

• DOI: 10.5281/zenodo.18002927
• Author: Blackglass Continuum Engineering Team
• License: MIT

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© 2025 Blackglass Continuum LLC.