This section specifies the principal runtime interaction sequences that characterize a CEI-based execution environment. The diagrams below are technology-neutral references intended for later realization in UML sequence notation.
| ID | Sequence | Purpose |
|---|---|---|
| SQ-001 | Authority Validation | Verify authority before consequence-bearing actions. |
| SQ-002 | Policy Evaluation | Evaluate governance policies against context. |
| SQ-003 | Evidence Collection | Gather and validate supporting evidence. |
| SQ-004 | Ledger Commit | Persist immutable governance events. |
| SQ-005 | Replay Execution | Reconstruct historical execution deterministically. |
| SQ-006 | Projection Rebuild | Generate operational read models from events. |
| SQ-007 | Controlled Override | Document exceptional governance paths. |
Client
│
▼
API Gateway
│
▼
Authority Check
│
▼
Policy Engine
│
▼
Evidence Validation
│
▼
Decision
│
├── DENY
└── GO
│
▼
Immutable Ledger
│
▼
Projection Update
| Field | Description |
|---|---|
| Actors | Systems or roles participating in the sequence. |
| Preconditions | Conditions required before execution. |
| Postconditions | Expected governed outcome. |
| Artifacts | Evidence, events, policies, receipts. |
Next: Volume II — Part III: State Machines & Decision Graphs.
This document forms part of the CEI publication record. Supporting evidence is organized through the engineering-evidence archive, specifications, architecture documentation and replay verification materials.