# **File: COMMIT_05_LEXICON.md**

## **Commit 5: ATproto Lexicon Definition**

### **Objective**

Define the custom ATproto Lexicon schema for com.ponderants.node. This JSON file
is the "Source of Truth" schema, defining the exact data shape that will be
published to the user's PDS.

### **Implementation Specification**

**1\. Create lexicon/com.ponderants.node.json**

Create a file at /lexicon/com.ponderants.node.json. This file defines our
application's primary data type within the ATproto ecosystem.16

JSON

{  
 "lexicon": 1,  
 "id": "com.ponderants.node",  
 "defs": {  
 "main": {  
 "type": "record",  
 "description": "A Ponderants thought node. It represents a single, captured
idea, intended to be linked to other nodes to form a 'thought galaxy'.",  
 "record": {  
 "type": "object",  
 "required": \["createdAt", "title", "body"\],  
 "properties": {  
 "createdAt": {  
 "type": "string",  
 "format": "datetime"  
 },  
 "title": {  
 "type": "string",  
 "maxLength": 256,  
 "description": "The title of the thought node."  
 },  
 "body": {  
 "type": "string",  
 "maxLength": 3000,  
 "description": "The main content of the thought node, often generated by the AI
interviewer."  
 },  
 "links": {  
 "type": "array",  
 "description": "An array of AT-URIs (as strong refs) pointing to other nodes
this node is linked to.",  
 "items": {  
 "type": "string",  
 "format": "at-uri"  
 },  
 "maxLength": 50  
 }  
 }  
 }  
 }  
 }  
}

### **Test Specification**

This commit defines a static schema. It will be implicitly tested by the API in
Commit 06, which must successfully publish a record conforming to this exact
shape.