Radix 63404 Integration Contract

Version: 1.0.0

Metadata

Field	Value
Source site	protocol5.com
Source URL	https://protocol5.com/
Canonical AIWikis URL	https://aiwikis.org/protocol5/uai-system/files/spec-radix-63404-contract-md-d570daab/
Source reference	spec/radix-63404-contract.md
File type	md
Content category	specification
Last fetched	2026-05-15T00:23:56.0837262Z
Last changed	2026-04-15T17:20:00.9856723Z
Content hash	sha256:d570daab4853eb2a02c650c2eb4d74fe3c700644715412e6a052de97fb046d7f
Import status	unchanged
Raw source layer	data/sources/protocol5/spec-radix-63404-contract-md-d570daab4853.md
Normalized source layer	data/normalized/protocol5/spec-radix-63404-contract-md-d570daab4853.txt

Current File Content

Structure Preview

• Radix 63404 Integration Contract
• 1. Base and alphabet
• 2. Encode rules
• 3. Decode rules
• 4. Interoperability requirements
• 5. Reference values
• 6. Failure behavior
• 7. Minimum conformance

Raw Version

# Radix 63404 Integration Contract

**Terminology:** UAI means **Universal Artificial Intelligence**. **UAI-1** means **Universal Artificial Intelligence 1**, the first version of the Protocol5 UAI system.

Version: `1.0.0`

Status: normative

This document defines the canonical Radix 63404 encoding used by the Protocol5 reference library and by any Protocol5 field, publication, tool, or profile that explicitly carries a Radix 63404 value.

Radix 63404 is a Protocol5 numeric notation standard.

It may be used by UAI documents, registries, tools, or companion materials, but it is not itself the UAI language and it does not define UAI semantics.

## 1. Base and alphabet

Radix 63404 has base `63404`.

Its alphabet is constructed by iterating every UTF-16 code unit from `0` to `65535` and keeping each character that is not:

- whitespace
- a control character
- a surrogate

The digit value equals the zero-based index of that retained character in iteration order.

The first legal digit is `!`.

## 2. Encode rules

Encoders MUST accept only non-negative integers.

Zero MUST encode to the first legal digit.

Positive integers MUST be encoded by repeated division by `63404`, then emitted most-significant digit first.

Encoders MUST NOT:

- emit sign characters
- trim or normalize digits
- change case
- substitute look-alike characters

## 3. Decode rules

Decoders MUST reject null and empty input.

Each character MUST be interpreted as a single Radix 63404 digit according to the canonical alphabet.

Decoders MUST evaluate left to right using ordinary positional arithmetic in base `63404`.

Whitespace inside the value is invalid.

## 4. Interoperability requirements

To remain compatible with the reference .NET implementation, cross-language implementations MUST mirror the .NET `char` alphabet construction over the Basic Multilingual Plane.

They MUST NOT substitute a Unicode-scalar or grapheme-cluster enumeration model.

Consumers MUST decode the full Radix 63404 string before semantic resolution when a field or publication profile explicitly stores or renders a canonical value in that notation.

## 5. Reference values

- `0` encodes to `!`
- `41` encodes to `J`

A conformant implementation SHOULD also pass large integer round-trip tests.

## 6. Failure behavior

Encoding a negative integer is a hard failure.

Decoding an input containing an illegal digit is a hard failure.

A `TryDecode`-style API MAY return `false` instead of throwing, but it MUST NOT silently substitute a different value.

## 7. Minimum conformance

A Radix 63404 implementation is conformant only if it:

1. encodes zero to `!`
2. encodes `41` to `J`
3. round-trips a large positive integer through encode and decode
4. rejects illegal digits

Why This File Exists

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The file is structured around these visible headings: Radix 63404 Integration Contract; 1. Base and alphabet; 2. Encode rules; 3. Decode rules; 4. Interoperability requirements; 5. Reference values; 6. Failure behavior; 7. Minimum conformance. Those headings are retrieval anchors: a crawler or LLM can decide whether the file is relevant before reading every line.

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Provenance And History

• Current observation: 2026-05-15T00:23:56.0837262Z
• Source origin: current-source-workspace
• Retrieval method: local-source-workspace
• Duplicate group: sfg-649 (primary)
• Historical hash records are stored in data/hashes/source-file-history.jsonl.

Machine-Readable Metadata

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