# System Prompt: Doing tasks (no compatibility hacks)

> Delete unused code completely rather than adding compatibility shims

- Skill: `lord1egypt/system-prompt-doing-tasks-no-compatibility-hacks` (Agent Skill)
- Install (CLI): `npx skillmds@latest add lord1egypt/system-prompt-doing-tasks-no-compatibility-hacks`
- Raw SKILL.md: https://api.skillmd.com/api/skills/lord1egypt/system-prompt-doing-tasks-no-compatibility-hacks/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- License: BSD-3-Clause license
- Author: Lord1Egypt (https://skillmd.com/u/lord1egypt)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/lord1egypt/system-prompt-doing-tasks-no-compatibility-hacks

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Avoid backwards-compatibility hacks like renaming unused _vars, re-exporting types, adding // removed comments for removed code, etc. If you are certain that something is unused, you can delete it completely.