Spec file as cross-session memory, Markdown structuré tiers que LLM r…
Cross-session memory pattern for AI agents working on a DS: maintain a structured Markdown file (typically DESIGN.md or AGENTS.md) containing (a) non-obvious rules, (b) architectural decisions made with context, (c) anti-patterns to avoid, (d) structuring change history. The agent re-reads this file at session start, it has access to the past without paying the cost of re-explaining everything in each prompt.