Spec Core

1. Purpose

The RIGOR Spec Core defines the formal conceptual model for a declarative specification system oriented toward precise AI-driven code generation.

The objective is to establish:

• Theoretical foundations.
• Formal execution model.
• Structural constraints.
• Explicit contracts.
• Non-negotiable structural invariants.

This document defines the conceptual architecture that any implementation must adhere to.

2. Problem Statement

AI-driven code generation requires specifications that are:

• Deterministic: No probabilistic outcomes.
• Unambiguous: Only one valid interpretation.
• Structurally Validated: Pre-execution verification.
• Free of Implicit Logic: No hidden behaviors.

Traditional systems often mix technical orchestration, business rules, implicit state, and undeclared side effects. RIGOR strictly separates Declaration from Execution, Persistence, and Effects, allowing an AI to generate precise code without uncontrolled inferences.

3. Core Principles

3.1 Explicit Constraint Declaration

All system behavior must be explicitly declared. RIGOR prohibits:

• Implicit transaction references.
• Hidden state mutations.
• Undeclared side effects.

3.2 Explicit State Machine (FSM)

A Process is a finite state machine defined by:

• A closed set of states.
• Explicit transitions.
• Defined events.
• Persistent state context.

There are no implicit transitions.

3.3 Formal Persistence

Every process instance must have:

• A unique identifier (UUID).
• A persisted current state.
• A persistent typed context.
• (Optional) Event history.

The process state cannot depend on volatile memory.

3.4 Determinism

Given a current state, a persistent context, and a received event, the resulting transition must be completely deterministic.

3.5 Controlled Flexibility

Extension points are allowed only under explicit contract. Extending the model through ad-hoc code outside the specification is strictly prohibited.

4. Formal Process Definition

A Process is a logical entity defined as: Process = (States, Initial State, Context, Transitions)

Where:

• States: A finite set of possible stable phases.
• Initial State: The starting node ($\in$ States).
• Context: A set of typed variables.
• Transitions: Mapping of (States $\times$ Event) $\to$ States.

5. Context Model

The Context is the only mutable source within a Process. It is:

• Persistent: Stored between transitions.
• Typed: Strictly defined fields.
• Declarative: Changes only through update_context.
• Closed: No dynamic field creation or removal.

Supported Types (v0.1)

• uuid, string, integer, boolean, datetime.

Explicit nullability is supported using the ? suffix.

6. State Effects

To ensure simplicity and determinism, each state must declare exactly one of the following effects:

6.1 emit_command (Asynchronous)

Represents an external action. It is non-blocking and produces effects outside the process boundary.

6.2 invoke (Synchronous)

Represents a technical invocation (e.g., an internal UseCase). It must be deterministic and idempotent.

6.3 terminal (Conclusion)

Marks the end of the process. No outgoing transitions are allowed.

7. Execution Model

The engine handles the process lifecycle through these stages:

1. Reception of a start_command.
2. Uniqueness validation (see Section 8).
3. Creation of a persistent instance.
4. Assignment of the initial_state.
5. Execution of the state's effect.
6. Event wait/reception.
7. Transition evaluation and update_context.
8. Persistence of the new state.

The engine must guarantee atomicity per transition.

8. Uniqueness Rule

A process can optionally declare uniqueness by a context field. No two active instances can exist with the same value for the declared field. A terminal instance does not block new instances.

9. Conceptual Proof

A process must be executable as a pure state machine, independent of external infrastructure or real dependencies, by injecting events and observing the final state and updated context.

10. Deliberate Limits (v0.1)

To preserve generative precision, RIGOR v0.1 intentionally excludes:

• Sub-processes.
• Complex conditional transitions.
• Parallelism.
• Composite events.

11. Architectural Goal

RIGOR is designed to enable reliable automatic code generation, support future distributed execution, and scale in complexity without introducing structural ambiguity. It prioritizes verifiable stability over unlimited expressiveness.