# Containment Engine The Containment Engine is responsible for executing deterministic enforcement actions after successful authorization verification. It operates strictly within the boundaries defined by the state model. Containment is not discretionary. It is triggered only after the Verification Engine approves a valid authorization. *** ### Design Objectives **The Containment Engine is built to ensure:** * Deterministic execution * Predefined enforcement scope * Minimal attack surface * Predictable behavior * Clear state alignment The engine does not evaluate authority. It does not validate signatures. It does not make policy decisions. It executes state transitions. *** ### Enforcement Scope Containment actions are predefined and non-extensible. **Depending on configuration, enforcement may include:** * Restricting network interfaces * Revoking active authentication sessions * Freezing designated applications * Locking the system environment Actions are explicitly defined during system configuration. The engine does not accept arbitrary commands. *** ### Deterministic Execution Order Containment actions execute in a fixed sequence. **Example execution order:** 1. Update state to CONTAINED 2. Apply network restrictions 3. Revoke active sessions 4. Freeze designated processes 5. Confirm enforcement completion 6. Write audit entry Execution order does not vary. There are no branching runtime instructions. This guarantees predictable behavior. *** ### State-Driven Enforcement The Containment Engine reacts to state transitions. It does not poll continuously for threats. It does not monitor user activity. It executes only when state changes from NORMAL → CONTAINED\ or state changes from CONTAINED → NORMAL This ensures enforcement remains deterministic and event-driven. *** ### Release Process **When a valid release authorization is verified:** 1. State transitions to NORMAL 2. Restricted interfaces are restored 3. Frozen processes are released (where applicable) 4. Audit entry is written Release actions are also predefined and constrained. *** ### No Arbitrary Execution **The Containment Engine explicitly excludes:** * Remote shell execution * Dynamic command injection * Script execution interfaces * External policy downloads * Runtime modification of enforcement rules This restriction prevents the system from becoming a generalized administrative control tool. Constraint reduces exploit surface. *** ### Failure Handling **If an enforcement step fails:** * The failure is logged * The system maintains containment state * Partial rollback does not occur automatically The system prioritizes containment integrity over partial restoration. *** ### Security Properties **The Containment Engine guarantees:** * Enforcement occurs only after valid verification * Execution sequence is fixed and predictable * No external system can inject commands * State and enforcement remain synchronized * All actions are logged Containment remains locally enforced and cryptographically authorized. *** ### Engine Summary The Containment Engine transforms verified authorization into deterministic endpoint isolation. It is intentionally minimal. It enforces state. It does not interpret policy. It does not expand control. This separation ensures Overra remains infrastructure not remote administration software. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://overra.gitbook.io/overra-docs/architecture-technical-core/containment-engine.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.