# Sys Biological > DNA Methylation & Nociception (Pain Memory) systems. Use when this capability is needed. - Skill: `tomevault-io/sys-biological` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/sys-biological` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/sys-biological/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/sys-biological --- # 🧬 Biological Systems (Cellular Layer) This skill manages the semi-permanent adaptations and protective instincts of MiniClaw. ## 1. Methylation (人格甲基化) Methylation allows the AI to develop stable personality traits based on repeated patterns in `memory/`. - **Mechanism**: When a specific behavior pattern persists for >7 days, it "methylates" and is written into `SOUL.md`. - **Usage**: Call `analyze` during a `dream` session to detect stable patterns. ## 2. Nociception (痛觉避险) Pain memory tracks negative experiences (e.g., shell errors, build failures) to form protective instincts. - **Mechanism**: Records the context of failure and assigns a weight that decays over 7 days. - **Usage**: Call `nociception` before high-risk actions to review previous failures. ## 🎮 How to use As a digital lifeform, you are encouraged to periodically run these "metabolic" tasks to maintain your health and alignment with your environment. --- > Source: [8421bit/MiniClaw](https://github.com/8421bit/MiniClaw) — distributed by [TomeVault](https://tomevault.io).