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schema.mdplugins/developer-kit-specs/skills/knowledge-graph/references/
Knowledge Graph JSON Schema
This document describes the complete JSON schema for the Knowledge Graph file.
File Location
docs/specs/[ID-feature]/knowledge-graph.jsonComplete Schema
{
"$schema": "http://json-schema.org/draft-07/schema#",
"title": "Knowledge Graph",
"description": "Persistent storage for codebase analysis discoveries",
"type": "object",
"required": ["metadata"],
"properties": {
"metadata": {
"type": "object",
"description": "Metadata about the knowledge graph",
"required": ["spec_id", "created_at", "updated_at", "version"],
"properties": {
"spec_id": {
"type": "string",
"description": "Specification identifier (e.g., '001-hotel-search-aggregation')"
},
"feature_name": {
"type": "string",
"description": "Feature name in kebab-case"
},
"created_at": {
"type": "string",
"format": "date-time",
"description": "ISO 8601 timestamp when KG was created"
},
"updated_at": {
"type": "string",
"format": "date-time",
"description": "ISO 8601 timestamp when KG was last updated"
},
"version": {
"type": "string",
"description": "Semantic version of the KG format (e.g., '1.0.0')"
},
"analysis_sources": {
"type": "array",
"description": "List of agents/sources that contributed to this KG",
"items": {
"type": "object",
"properties": {
"agent": {
"type": "string",
"description": "Agent name (e.g., 'general-code-explorer')"
},
"timestamp": {
"type": "string",
"format": "date-time"
},
"focus": {
"type": "string",
"description": "What the agent analyzed (e.g., 'similar features')"
}
}
}
}
}
},
"codebase_context": {
"type": "object",
"description": "High-level context about the codebase",
"properties": {
"project_structure": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": ["layered", "modular", "hexagonal", "clean"],
"description": "Architecture type"
},
"root_directories": {
"type": "array",
"items": { "type": "string" }
},
"build_system": {
"type": "string",
"enum": ["maven", "gradle", "npm", "pip", "composer"]
},
"test_framework": {
"type": "string"
}
}
},
"technology_stack": {
"type": "object",
"properties": {
"language": {
"type": "string",
"enum": ["java", "typescript", "python", "php", "javascript"]
},
"framework": {
"type": "string"
},
"version": {
"type": "string"
},
"dependencies": {
"type": "array",
"items": {
"type": "object",
"properties": {
"name": { "type": "string" },
"version": { "type": "string" }
}
}
}
}
}
}
},
"patterns": {
"type": "object",
"properties": {
"architectural": {
"type": "array",
"description": "Architectural patterns found in codebase",
"items": {
"type": "object",
"required": ["id", "name"],
"properties": {
"id": {
"type": "string",
"description": "Unique pattern identifier (e.g., 'pat-001')"
},
"name": {
"type": "string",
"description": "Pattern name (e.g., 'Repository Pattern')"
},
"description": {
"type": "string"
},
"files": {
"type": "array",
"items": { "type": "string" },
"description": "Glob patterns for files using this pattern"
},
"convention": {
"type": "string",
"description": "How the pattern is implemented in this codebase"
},
"examples": {
"type": "array",
"items": {
"type": "object",
"properties": {
"file": { "type": "string" },
"line": { "type": "integer" },
"snippet": { "type": "string" }
}
}
}
}
}
},
"conventions": {
"type": "array",
"description": "Coding conventions and standards",
"items": {
"type": "object",
"required": ["id", "category", "rule"],
"properties": {
"id": {
"type": "string"
},
"category": {
"type": "string",
"enum": ["naming", "testing", "documentation", "error-handling"]
},
"rule": {
"type": "string",
"description": "The convention rule"
},
"examples": {
"type": "array",
"items": { "type": "string" }
}
}
}
}
}
},
"components": {
"type": "object",
"properties": {
"controllers": {
"type": "array",
"items": { "$ref": "#/definitions/component" }
},
"services": {
"type": "array",
"items": { "$ref": "#/definitions/component" }
},
"repositories": {
"type": "array",
"items": { "$ref": "#/definitions/component" }
},
"entities": {
"type": "array",
"items": { "$ref": "#/definitions/component" }
},
"dtos": {
"type": "array",
"items": { "$ref": "#/definitions/component" }
}
}
},
"provides": {
"type": "array",
"description": "What tasks provide after implementation (for contract validation)",
"items": {
"type": "object",
"required": ["task_id", "file", "symbols", "type"],
"properties": {
"task_id": {
"type": "string",
"description": "Task identifier (e.g., 'TASK-001')"
},
"file": {
"type": "string",
"description": "Full file path relative to project root"
},
"symbols": {
"type": "array",
"items": { "type": "string" },
"description": "Symbols (classes, interfaces, functions) provided by this file"
},
"type": {
"type": "string",
"enum": ["entity", "value-object", "service", "repository", "controller", "function", "module", "class", "interface", "dto"],
"description": "Type of component"
},
"implemented_at": {
"type": "string",
"format": "date-time",
"description": "ISO 8601 timestamp when this was implemented"
}
}
}
},
"apis": {
"type": "object",
"properties": {
"internal": {
"type": "array",
"description": "Internal REST/API endpoints",
"items": {
"type": "object",
"required": ["id", "path", "method"],
"properties": {
"id": { "type": "string" },
"name": { "type": "string" },
"type": { "type": "string", "enum": ["rest", "graphql", "grpc"] },
"path": { "type": "string" },
"method": {
"type": "string",
"enum": ["GET", "POST", "PUT", "DELETE", "PATCH"]
},
"controller": { "type": "string" },
"line": { "type": "integer" },
"parameters": {
"type": "array",
"items": {
"type": "object",
"properties": {
"name": { "type": "string" },
"type": { "type": "string" },
"required": { "type": "boolean" }
}
}
},
"response": { "type": "string" },
"errors": {
"type": "array",
"items": {
"type": "object",
"properties": {
"status": { "type": "integer" },
"condition": { "type": "string" }
}
}
}
}
}
},
"external": {
"type": "array",
"description": "External APIs/integrations",
"items": {
"type": "object",
"required": ["id", "base_url"],
"properties": {
"id": { "type": "string" },
"name": { "type": "string" },
"type": { "type": "string", "enum": ["rest", "soap", "graphql"] },
"base_url": { "type": "string" },
"authentication": { "type": "string" },
"endpoints": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": { "type": "string" },
"method": { "type": "string" },
"path": { "type": "string" },
"purpose": { "type": "string" },
"used_by": { "type": "string" }
}
}
}
}
}
}
}
},
"integration_points": {
"type": "array",
"description": "Integration points with external systems",
"items": {
"type": "object",
"required": ["id", "name", "type"],
"properties": {
"id": { "type": "string" },
"name": { "type": "string" },
"type": {
"type": "string",
"enum": ["database", "cache", "message-queue", "external-api"]
},
"technology": { "type": "string" },
"purpose": { "type": "string" },
"configuration": { "type": "string" },
"used_by_components": {
"type": "array",
"items": { "type": "string" }
}
}
}
},
"testing": {
"type": "object",
"properties": {
"framework": { "type": "string" },
"structure": { "type": "string" },
"conventions": {
"type": "array",
"items": { "type": "string" }
},
"examples": {
"type": "array",
"items": {
"type": "object",
"properties": {
"file": { "type": "string" },
"tests": {
"type": "array",
"items": { "type": "string" }
}
}
}
}
}
},
"architecture_decisions": {
"type": "object",
"description": "Key architectural decisions with rationale",
"additionalProperties": {
"type": "object",
"properties": {
"decision": { "type": "string" },
"rationale": { "type": "string" },
"alternatives_considered": {
"type": "array",
"items": { "type": "string" }
}
}
}
},
"validation_rules": {
"type": "array",
"description": "Custom validation rules for this codebase",
"items": {
"type": "object",
"required": ["id", "rule", "severity"],
"properties": {
"id": { "type": "string" },
"rule": { "type": "string" },
"checker": { "type": "string" },
"severity": {
"type": "string",
"enum": ["error", "warning", "info"]
}
}
}
},
"quality_metrics": {
"type": "object",
"properties": {
"code_coverage": { "type": "string" },
"test_count": { "type": "integer" },
"component_count": { "type": "integer" },
"last_analysis": {
"type": "string",
"format": "date-time"
}
}
}
},
"definitions": {
"component": {
"type": "object",
"required": ["id", "name", "location", "type"],
"properties": {
"id": {
"type": "string",
"description": "Unique component identifier (e.g., 'comp-ctrl-001')"
},
"name": {
"type": "string",
"description": "Component class/file name"
},
"location": {
"type": "string",
"description": "Full file path relative to project root"
},
"type": {
"type": "string",
"enum": ["controller", "service", "repository", "entity", "dto", "config"]
},
"responsibilities": {
"type": "array",
"items": { "type": "string" }
},
"endpoints": {
"type": "array",
"description": "For controllers: list of endpoints",
"items": {
"type": "object",
"properties": {
"method": { "type": "string" },
"path": { "type": "string" },
"line": { "type": "integer" },
"description": { "type": "string" }
}
}
},
"methods": {
"type": "array",
"description": "For services: list of key methods",
"items": {
"type": "object",
"properties": {
"name": { "type": "string" },
"line": { "type": "integer" },
"description": { "type": "string" },
"returns": { "type": "string" }
}
}
},
"dependencies": {
"type": "array",
"items": { "type": "string" },
"description": "Component names this component depends on"
},
"uses_components": {
"type": "array",
"items": { "type": "string" },
"description": "Component IDs this component uses"
}
}
}
}
}Example: Complete Knowledge Graph
See the complete example in the architect's output (available in the command history). Here's a minimal example:
{
"metadata": {
"spec_id": "001-hotel-search-aggregation",
"feature_name": "hotel-search-aggregation",
"created_at": "2026-03-14T10:30:00Z",
"updated_at": "2026-03-14T15:45:00Z",
"version": "1.0.0",
"analysis_sources": [
{
"agent": "general-code-explorer",
"timestamp": "2026-03-14T10:30:00Z",
"focus": "similar features analysis"
}
]
},
"patterns": {
"architectural": [
{
"id": "pat-001",
"name": "Repository Pattern",
"convention": "All repositories extend JpaRepository",
"files": ["src/main/java/**/repository/*Repository.java"]
}
],
"conventions": [
{
"id": "conv-001",
"category": "naming",
"rule": "Controller classes end with 'Controller'"
}
]
},
"components": {
"controllers": [
{
"id": "comp-ctrl-001",
"name": "HotelController",
"location": "src/main/java/com/example/hotel/controller/HotelController.java",
"type": "controller"
}
],
"services": [],
"repositories": [],
"entities": [],
"dtos": []
},
"apis": {
"internal": [],
"external": []
}
}Schema Evolution
This schema may evolve over time. The version field in metadata tracks the format version.
Versioning rules:
- MAJOR: Breaking changes to schema structure
- MINOR: New optional fields added
- PATCH: Bug fixes to documentation
When evolving the schema:
- Update the
versionfield - Document changes in CHANGELOG
- Provide migration path for existing KGs
- Maintain backwards compatibility when possible
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