Pattern Proposal: Layered CLI, Runner, and Governance Architecture

Summary

The project separates a thin CLI entry point from a FlowRunner application layer and from governance domain services and models.

Candidate Pattern

• ID: layered-cli-runner-governance-architecture
• Classification: governance
• Maturity: strategic_direction
• Type: emerging

Observed Signals

No specific signals listed.

Evidence

Supporting Evidence

• src/cas_runner/cli.py
• src/cas_runner/runner.py
• src/cas_runner/governance/governance_action_service.py

Scope Assessment

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

Rationale

• Intent: Keep user invocation, run orchestration, and governance semantics in distinct Python modules so the executable core can be reasoned about as a layered application.
• Context: A Python codebase with a CLI module, a runner module, and a governance subpackage containing services, engines, and models.
• Force: The system exposes an executable entry point
• Force: Governance logic is deep enough to deserve its own subdomain
• Force: Run-level control should not be hardwired into command parsing

Traceability

Artifact source: proposed-patterns