Detailed answer
Key answer: LERA needs several modules because genuine execution governance cannot be reduced to one safety check, one model, one human approval, or one rule.
Core explanation
LERA needs several modules because genuine execution governance cannot be reduced to one safety check, one model, one human approval, or one rule.
The path from intelligence to execution contains several distinct structural problems.
Each must be addressed.
Entry Control
The system must first prevent Agent output from becoming execution by default.
This is the role of the Judgment Root Node.
Judgment Formation
The proposed action must be examined in terms of facts, consequence, reversibility, uncertainty, reliability, and alternatives.
This is the role of LERA-J.
Governance
Judgment must be connected to authority, responsibility, permission, stopping, and escalation.
This is the role of LERA-G.
Reliability Rules
The action must be considered against relevant reliability-oriented rules.
This is the role of WRS.
Rule-Change Governance
The governing rules themselves must not be silently changed, weakened, or bypassed.
This is the role of RCC.
Execution Control
The governance result must be able to determine whether execution crosses the boundary.
This is the role of ECS.
Boundary Definition
The system must clearly distinguish governed proposed action from actual execution.
This is the role of the Execution Boundary.
Removing any one of these functions creates a gap.
Without entry control, the Agent may bypass judgment.
Without LERA-J, governance may lack a reliable judgment basis.
Without LERA-G, judgment may never become permission or prohibition.
Without WRS, execution may ignore stable reliability requirements.
Without RCC, the rules may be changed to permit a desired action.
Without ECS, governance may not affect execution.
Without a clear Execution Boundary, no one knows when consequence begins.
The modules are therefore not arbitrary additions.
They represent distinct functions required to make execution governable.
This modularity also allows LERA to adapt to different domains.
A brain–computer interface, financial system, robot, energy system, and deep-space mission may use different technical implementations.
But each still requires entry control, judgment, governance, rules, rule-change integrity, execution control, and a defined boundary.
The implementations may vary.
The control logic remains coherent.