Janus Runtime Model

Purpose: rendered surface for the runtime model document (with source attached).

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1. Purpose

Janus defines a governance core; runtimes execute the model in concrete environments.

2. Reference Runtime

The current Node demo runtime is a reference implementation proving:

• governance evaluation
• omission detection
• evidence model (E+ / E-)
• audit writer boundary
• deterministic rebuild

Location:

runtimes/demo-node/

It is intentionally minimal and designed for demonstration.

3. Future Runtimes

Production runtimes may implement the same model in different environments, for example:

• Node runtime
• Python runtime
• Apps Script runtime
• Database-backed runtime

These runtimes must respect the Janus Core invariants.

4. Adapters

Runtimes may use adapters for:

• storage
• databases
• message systems
• APIs

Examples:

filesystem adapter postgres adapter event-stream adapter

5. Principle

Janus governs system evolution. Runtimes execute governance evaluation.

Source

# Janus Runtime Model

## 1. Purpose

Janus defines a governance core; runtimes execute the model in concrete environments.

## 2. Reference Runtime

The current Node demo runtime is a reference implementation proving:
- governance evaluation
- omission detection
- evidence model (E+ / E-)
- audit writer boundary
- deterministic rebuild

Location:

runtimes/demo-node/

It is intentionally minimal and designed for demonstration.

## 3. Future Runtimes

Production runtimes may implement the same model in different environments, for example:
- Node runtime
- Python runtime
- Apps Script runtime
- Database-backed runtime

These runtimes must respect the Janus Core invariants.

## 4. Adapters

Runtimes may use adapters for:
- storage
- databases
- message systems
- APIs

Examples:

filesystem adapter  
postgres adapter  
event-stream adapter

## 5. Principle

Janus governs system evolution.  
Runtimes execute governance evaluation.