Exploded axonometric · Diagram Design
AI agent stack · What sits under the prompt
AI agent stack · What sits under the prompt
Exploded view of an AI agent stack: a secrets vault at the base, then tools, skills, the agent harness that runs the model, and the chat or terminal interface on top, with skills as the focal layer.
Secrets vault
scoped service token
Tools
clis, apis, mcp, scripts
Skills
markdown playbooks
Agent harness
claude code, codex
Interface
chat or terminal
FOCAL LAYER
Skills are plain files the agent reads before it acts. Swap the harness or the model and they still work.