Add platform context architecture diagram and documentation

architecture/workspace/context-kellcreations-platform.puml

@@ -0,0 +1,31 @@
+@startuml
+!include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Context.puml
+
+LAYOUT_WITH_LEGEND()
+
+title Kell Creations Platform - System Context
+
+Person(owner, "Business Owner", "Oversees business operations, governance, and growth")
+Person(staff, "Operations Staff", "Supports production, publishing, fulfillment, and administration")
+
+System(platform, "Kell Creations Platform", "Unified business applications, policies, workflows, and shared services")
+
+System_Ext(wordpress, "WordPress", "Website and content publishing platform")
+System_Ext(n8n, "n8n", "Workflow automation and AI-enabled process orchestration")
+System_Ext(mail, "Mail Server", "Business notifications, approvals, and communications")
+System_Ext(git, "Forgejo Git", "Source control and auditable documentation history")
+System_Ext(facebook, "Facebook", "Social media publishing and engagement")
+System_Ext(instagram, "Instagram", "Social media publishing and engagement")
+System_Ext(xsocial, "X", "Social media publishing and engagement")
+
+Rel(owner, platform, "Uses to govern and manage")
+Rel(staff, platform, "Uses for daily operations")
+Rel(platform, wordpress, "Publishes content, product updates, and site changes to")
+Rel(platform, n8n, "Sends and receives workflow automation tasks with")
+Rel(platform, mail, "Sends notifications, reminders, and approval messages through")
+Rel(platform, git, "Stores controlled source, documentation, and policy history in")
+Rel(platform, facebook, "Publishes campaigns and content to")
+Rel(platform, instagram, "Publishes campaigns and content to")
+Rel(platform, xsocial, "Publishes campaigns and content to")
+
+@enduml

docs/architecture/context/platform.md

@@ -1,3 +1,43 @@
 # Platform Context
 
-This page describes the Kell Creations platform in relation to business users and external services.
+This diagram shows the Kell Creations Platform in relation to its primary users and connected external systems.
+
+## Purpose
+
+This view explains how the platform interacts with the surrounding business environment. It is intended to provide a clear context for later container, component, deployment, and workflow views.
+
+## Diagram Source
+
+The source for this diagram is maintained as architecture code in:
+
+`architecture/workspace/context-kellcreations-platform.puml`
+
+## Included Elements
+
+### Internal platform
+- Kell Creations Platform
+
+### Business users
+- Business Owner
+- Operations Staff
+
+### External connected systems
+- WordPress
+- n8n
+- Mail Server
+- Forgejo Git
+- Facebook
+- Instagram
+- X
+
+## Notes
+
+This context view will later be decomposed into container-level diagrams for:
+
+- Inventory
+- Social Media Management
+- WordPress Management
+- Craft Manufacturing / MRP
+- Financial Analysis
+- Transaction Database
+- Shared services for authentication, data repository, API orchestration, notifications, and audit support