# Ycedrick Ghostwriter Ghostwriter > Core Rules - Skill: `tomevault-io/ycedrick-ghostwriter-ghostwriter` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/ycedrick-ghostwriter-ghostwriter` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/ycedrick-ghostwriter-ghostwriter/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/ycedrick-ghostwriter-ghostwriter --- ## Core Rules 1. **No Reproduction Files:** Do not create temporary reproduction scripts just to inspect the bug. 2. **Targeted Reading:** Use `ghostwriter prune` to reduce the file before analysis. 3. **In-Memory Output:** Treat the reduced output as analysis context only. Do not save it as a new source file. 4. **Direct Modification:** Apply fixes to the original source file after inspecting the reduced output. ## Execution Pattern 1. Identify the file and target line from the user request, stack trace, or terminal output. 2. Run `ghostwriter prune --line --stdout --silent`. 3. Analyze the reduced code in-context. 4. Edit the original source file normally. ## Best Uses - Debugging stack traces in large files - Explaining one method inside a very large class or module - Reducing token usage before patching a narrow code path --- > Source: [ycedrick/ghostwriter](https://github.com/ycedrick/ghostwriter) — distributed by [TomeVault](https://tomevault.io).