ai-dev-tools-sync

name	ai-dev-tools-sync
description	Synchronize and update Claude Code and GitHub Copilot development tool configurations to work similarly. Use when asked to update Claude Code setup, update Copilot setup, sync AI dev tools, add new skills/prompts/agents across both platforms, or ensure Claude and Copilot configurations are aligned. Covers skills, prompts, agents, instructions, workflows, and chat modes.
infer	true

AI Dev Tools Sync

Synchronize Claude Code and GitHub Copilot configurations to maintain feature parity.

When to Use

Activate this skill when:

• User asks to update Claude Code or Copilot setup
• User wants to add/modify skills, prompts, agents, or instructions
• User wants both tools to work similarly
• User asks about AI dev tool configuration

Quick Reference

Claude Code	GitHub Copilot	Location
SKILL.md	SKILL.md	.claude/skills/ + .github/skills/
commands/*.md	prompts/*.prompt.md	.claude/commands/ + .github/prompts/
agents/*.md	agents/*.md	.github/agents/ (shared)
workflows/*.md	-	.claude/workflows/
CLAUDE.md	copilot-instructions.md	Root + .github/
-	instructions/*.md	.github/instructions/ (applyTo patterns)
-	chatmodes/*.chatmode.md	.github/chatmodes/

GitHub Copilot Features Catalog

Complete catalog of GitHub Copilot customization features (as of 2026).

Configuration Files

Repository-Level (.github/)

File/Folder	Purpose	Format
copilot-instructions.md	Global instructions for all Copilot interactions	Markdown
instructions/*.instructions.md	Path-scoped instructions with applyTo frontmatter	Markdown + YAML
prompts/*.prompt.md	Reusable prompts (slash commands)	Markdown + YAML
agents/*.md	Agent definitions	Markdown + YAML
skills/*/SKILL.md	Agent skills with bundled resources	Markdown + YAML
chatmodes/*.chatmode.md	Custom chat personalities	Markdown + YAML
AGENTS.md	Master agent routing file	Markdown

Also Supported (Backward Compatibility)

• .claude/skills/ - Copilot auto-reads Claude skills
• CLAUDE.md - Copilot reads if present
• GEMINI.md - Gemini CLI format

Feature Details

Custom Instructions (copilot-instructions.md)

Root instructions auto-included in every request.

# Project Guidelines
- Use TypeScript for all new files
- Follow BEM naming for CSS classes

Path-Scoped Instructions (.github/instructions/)

Apply to specific file patterns via applyTo:

---
applyTo: "src/Services/**/*.cs"
excludeAgent: ["code-review"] # Optional: exclude specific agents
---
# Backend C# Guidelines
Use PlatformValidationResult for validation...

Prompts (.github/prompts/)

Reusable via /prompt-name in chat:

---
mode: agent # Optional: agent, chat, edit
---
# Debug this issue
1. Analyze the error
2. Find root cause
3. Propose fix

Agent Skills (.github/skills/)

Folder structure with SKILL.md + bundled resources:

skills/my-skill/
├── SKILL.md
├── scripts/
├── references/
└── assets/

Chat Modes (.github/chatmodes/)

Custom chat personalities with tool restrictions:

---
name: security-reviewer
tools: ["read", "grep", "glob"] # Restrict tools
---
# Security Review Mode
Focus only on security vulnerabilities...

Agents (.github/agents/)

Specialized agent definitions:

---
name: frontend-developer
description: UI/UX implementation specialist
---
# Frontend Developer Agent
Specializes in React, TypeScript, CSS...

Sync Patterns

Patterns for keeping Claude Code and GitHub Copilot configurations synchronized.

Skill Sync

Both platforms support skills in .github/skills/. Copilot also reads .claude/skills/.

Best Practice: Create skills in .github/skills/ for maximum compatibility.

.github/skills/my-skill/
├── SKILL.md          # Both platforms read
├── scripts/          # Executable scripts
├── references/       # Progressive disclosure docs
└── assets/           # Templates, images

Prompt/Command Sync

Claude Code	GitHub Copilot
.claude/commands/my-cmd.md	.github/prompts/my-cmd.prompt.md
Invoked via /my-cmd	Invoked via /my-cmd or #prompt:my-cmd

Sync Strategy:

1. Create in .github/prompts/ (both read)
2. Or maintain duplicates if behavior differs

Instructions Sync

Claude Code	GitHub Copilot
CLAUDE.md (root)	.github/copilot-instructions.md
Single file	Multi-file with applyTo patterns

Sync Strategy:

1. Keep core rules in both files
2. Use .github/instructions/ for path-scoped rules (Copilot-specific)
3. Reference detailed docs from both files

Agent Sync

Both platforms read .github/agents/*.md.

Single Source: Maintain agents in .github/agents/ only.

Workflow Sync

Claude has workflow orchestration. Copilot uses chat modes.

Claude Workflow	Copilot Equivalent
Sequential agent chains	Chat mode switching
.claude/workflows/	.github/chatmodes/

Decision Matrix

Feature	Location	Reason
Skills	.github/skills/	Maximum compatibility
Prompts	.github/prompts/	Both platforms read
Agents	.github/agents/	Shared location
Instructions	Both files	Platform-specific nuances
Workflows	.claude/workflows/	Claude-specific
Chat Modes	.github/chatmodes/	Copilot-specific

Common Sync Tasks

Add New Skill

mkdir -p .github/skills/new-skill
# Create SKILL.md with frontmatter
# Add references/ and scripts/ as needed

Add New Prompt

# Create in .github/prompts/ for both platforms
touch .github/prompts/new-prompt.prompt.md

Update Core Instructions

1. Edit CLAUDE.md
2. Edit .github/copilot-instructions.md
3. Keep essential rules in sync

Add Path-Scoped Instructions (Copilot)

# Copilot-specific feature
touch .github/instructions/backend-cqrs.instructions.md
# Add applyTo: "src/Services/**/*Command*.cs"

Sync Process

Step 1: Understand Current Setup

Read these files to understand current configuration:

.claude/workflows/orchestration-protocol.md
.claude/workflows/primary-workflow.md
.github/copilot-instructions.md
.github/AGENTS.md
CLAUDE.md

Step 2: Research Latest Features

Search web for:

• "GitHub Copilot features setup 2026"
• "GitHub Copilot custom instructions agents skills prompts"
• "GitHub Copilot agent mode workspace context"

See the GitHub Copilot Features Catalog section above for the full feature catalog.

Step 3: Identify Sync Opportunities

Compare capabilities and identify gaps:

• Skills missing in one platform
• Inconsistent prompt/instruction behavior
• Agent definitions that differ

Step 4: Implement Changes

For each change:

1. Skills: Create in both .claude/skills/ and .github/skills/
2. Prompts: Create in both .claude/commands/ and .github/prompts/
3. Instructions: Update both CLAUDE.md and .github/copilot-instructions.md
4. Agents: Update .github/agents/ (shared by both)

Compatibility Notes

• Copilot reads .claude/skills/ automatically (backward compatibility)
• Both read .github/prompts/*.prompt.md
• Both read .github/agents/*.md
• Both read AGENTS.md in root or .github/
• Both support path-based instruction files via applyTo in frontmatter

Sources

• GitHub Copilot Docs
• Custom Instructions
• Agent Skills
• Awesome Copilot

IMPORTANT Task Planning Notes

• Always plan and break many small todo tasks
• Always add a final review todo task to review the works done at the end to find any fix or enhancement needed