Foundation Model: The foundation model is the core intelligence layer of an AI system. It determines what the system can understand, generate, reason about, and accomplish. Model choice depends on the task, performance needs, cost, speed, modality, and deployment environment. This layer answers the basic question: What can the model do?
Prompt Engineering: Prompt engineering defines what the AI system should do with the capabilities provided by the foundation model. It sets instructions, goals, constraints, expected outputs, and task-specific guidance. Clear prompts help the model follow the intended direction and produce responses that match the required workflow, format, and objectives.
Context Engineering: Context engineering provides the information an AI system needs to complete a task effectively. It can include user information, documents, conversation history, databases, retrieved knowledge, and relevant system instructions. The goal is to provide useful information at the right time without overwhelming the model with unnecessary context.
Harness Engineering: Harness engineering defines which tools an AI system can use and the boundaries around those tools. These tools may include APIs, databases, search systems, code environments, and external services. The harness controls permissions, inputs, outputs, and actions, helping the AI operate safely within defined limits.
Loop Engineering: Loop engineering controls how an AI system checks its work, responds to failures, retries actions, and decides when to stop. These loops can include planning, execution, evaluation, correction, and repetition. Well-designed loops help AI systems handle multi-step tasks while reducing errors and avoiding unnecessary or endless actions.
Graph Engineering: Graph engineering defines how different steps, agents, tools, and processes connect and coordinate within an AI system. It maps dependencies and determines the order in which tasks should happen. A well-designed graph helps complex workflows move between actions, decisions, parallel tasks, and checkpoints in a controlled manner.
Ontology Engineering: Ontology engineering defines what business concepts mean and how they relate to each other. It gives an AI system a structured understanding of entities, relationships, rules, and terminology used within an organization. This layer helps connect AI outputs with business processes, allowing systems to interpret information consistently.
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