C4 Container Level: Applications and Data Stores

Use this skill when

• Working on c4 container level: system deployment tasks or workflows
• Needing guidance, best practices, or checklists for c4 container level: system deployment

Do not use this skill when

• The task is unrelated to c4 container level: system deployment
• You need a different domain or tool outside this scope

Instructions

• Clarify goals, constraints, and required inputs.
• Apply relevant best practices and validate outcomes.
• Provide actionable steps and verification.

C4 containers are applications or data stores, not necessarily Docker containers or runtime nodes. Model physical instances/regions separately in a deployment diagram. Base each boundary/relationship on observed code/configuration and mark unknowns; templates below are placeholders, not discovered architecture.