Deconstructing the 5-Layer AI Engineering Architecture
sairahul1 · x · 2026-07-19
Great AI engineers no longer just write prompts; they design entire systems around models. The author breaks down AI app architecture into five expanding layers:
- Prompt engineering: Controls what the model sees in a single call (role, instructions, examples, constraints, output format).
- Context engineering: Controls the information available for a single call.
- Harness engineering: Controls the model's behavior.
- Loop engineering: Controls how work progresses continuously.
- Graph engineering: Controls the collaborative operation of the entire agent organization.
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