test/VaultMesh_Catalog_v1/pages/page7-oracle-shield.md

Page Title: Oracle Engine & Shield Defense (TEM Stack) Summary: The Oracle Engine provides structured reason → decide → act chains, while Shield and TEM form the defensive veil. Together they detect threats, log them to the proof system, and (optionally) orchestrate responses across shield-vm, lab nodes, and the wider mesh.

Key Findings:

• Oracle chains decisions through explicit reasoning steps, not opaque actions.
• Every significant decision can emit receipts into the proof spine.
• Shield monitors multiple vectors (network, process, file, device, etc.).
• Response levels span from passive logging to active isolation or countermeasures.
• Agent tasks allow scheduled or triggered operations (e.g., periodic scans).

Components:

• Oracle Reasoning Engine.
• Oracle Decision System.
• Tactical Chain Executor.
• Shield Monitor (sensors).
• Shield Responder (actions).
• TEM daemon (threat transmutation logic).
• Agent Task Scheduler.

Oracle Tools:

Tool	Purpose
oracle_status	Node status and capabilities
oracle_reason	Analyze situation, propose actions
oracle_decide	Make autonomous decision
oracle_tactical_chain	Full reason → decide → act chain

Oracle Tactical Chain Flow:

1. Context: Collect current state (logs, metrics, alerts, lawchain state).
2. Reason: oracle_reason produces candidate actions with justifications.
3. Decide: oracle_decide selects an action based on risk tolerance and constraints.
4. Act: Execute playbooks, or keep in dry-run mode for simulation.
5. Prove: Generate a receipt and anchor via proof system (optional but recommended).

Shield Monitor Vectors:

Vector	Detection Capability
network	Port scans, unusual flows
wifi	Rogue APs, deauth attempts
bluetooth	Device enumeration/anomalies
usb	Storage/HID abuse
process	Suspicious binaries, behavior
file	Unauthorized modifications

Shield Response Levels:

Level	Action
log	Record event only
alert	Notify operator (Slack/email/etc.)
block	Prevent connection/action
isolate	Quarantine node/container/service
counter	Active response (e.g., honeypots)

Agent Tasks:

{
  "name": "scheduled_scan",
  "trigger": {
    "type": "schedule",
    "config": {"cron": "0 */6 * * *"}
  },
  "actions": [
    {"tool": "shield_monitor", "args": {"vectors": ["network", "wifi"]}},
    {"tool": "oracle_tactical_chain", "args": {"dry_run": true}}
  ],
  "on_complete": "mesh_broadcast"
}

Security Notes:

• Dry-run mode is default for dangerous operations; production actions require explicit opt-in.
• Risk tolerance levels gate what Shield/TEM may do without human approval.
• All automated decisions can be bound to receipts for post-incident audit.

MCP / Mesh Tools:

• oracle_status, oracle_reason, oracle_decide, oracle_tactical_chain
• shield_status, shield_monitor, shield_respond
• Agent task management: agent_task, agent_list, agent_cancel

Dependencies:

• OffSec MCP server running on shield-vm/lab nodes.
• Proof system enabled for Oracle and Shield receipts.
• Integrations with metrics (Prometheus) and observability (Grafana).