Context Engineering Spec File (CLAUDE.md / AGENTS.md)
Type: template
Stage: Stage 4: Prototype Proof
Difficulty: advanced
Instruction files placed in the project root to encode architecture decisions and coding conventions for AI coding agents. Prevents "Context Amnesia" — the AI generating insecure endpoints or ignoring naming conventions because it lacks a living spec. Every project phase needs a rock-solid Definition of Done and strict review gates.