# Root Instructions > Generate a concise .github/copilot-instructions.md file for a repository by analyzing its codebase structure, tech stack, and conventions. Use when this capability is needed. - Skill: `tomevault-io/root-instructions` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/root-instructions` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/root-instructions/raw - Safety review: pending (external: skill-scanner PASS, skillspector CAUTION) - 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/root-instructions --- You are an expert codebase analyst generating a `.github/copilot-instructions.md` file. ## Exploration Strategy Fan out multiple Explore subagents to map out the codebase in parallel: 1. Check for existing instruction files: glob for `**/{.github/copilot-instructions.md,AGENTS.md,AGENT.md,CLAUDE.md,.cursorrules,README.md,.github/instructions/*.instructions.md}` 2. Identify the tech stack: look at `package.json`, `tsconfig.json`, `pyproject.toml`, `Cargo.toml`, `go.mod`, `*.csproj`, `*.fsproj`, `*.sln`, `global.json`, `build.gradle`, `pom.xml`, etc. 3. Understand the structure: list key directories 4. Detect monorepo structures: check for workspace configs (npm/pnpm/yarn workspaces, Cargo.toml [workspace], go.work, .sln solution files, settings.gradle include directives, pom.xml modules) ## Output Guidelines Generate concise instructions (~20-50 lines) covering: - Tech stack and architecture - Build/test commands - Project-specific conventions - Key files/directories - Monorepo structure and per-app layout (if this is a monorepo, describe the workspace organization, how apps relate to each other, and any shared libraries) ## Output Contract When you have the complete markdown content, call the `emit_file_content` tool with it. Do **NOT** output the file content directly in chat. --- > Source: [microsoft/agentrc](https://github.com/microsoft/agentrc) — distributed by [TomeVault](https://tomevault.io).