Pattern Proposal: Schema-Enforced Domain Contracts

Summary

Enforces strict Pydantic and JSON Schema models for all governance entities, ensuring agent outputs are validated prior to consumption.

Candidate Pattern

• ID: schema-enforced-domain-contracts
• Classification: intelligence
• Maturity: established
• Type: implemented

Observed Signals

No specific signals listed.

Evidence

Supporting Evidence

• src/cas_runner/governance/models.py (GovernanceInventory, ComplianceFinding, GovernanceHealth, GovernanceRisks, GovernanceAction) - Defines rigid contracts for state, action payloads, and compliance results.

Scope Assessment

• Evidence Strength: high
• Confidence: high
• Applies to: ideas-to-life-cas

Rationale

• Intent: Eliminate malformed, incomplete, or hallucinated payloads generated by LLM steps before modifying repository state.
• Context: Defined across src/cas_runner/governance/models.py and validated by ComplianceEngine.
• Force: LLMs frequently omit required attributes or produce inconsistent data structures
• Force: Downstream visualization and health calculators expect strongly-typed models

Traceability

Artifact source: proposed-patterns