MCP Dependency Check

Ensures the OpenAPI Sync MCP server is installed before running OAS commands.

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EXECUTION INSTRUCTIONS

When this skill is invoked, Claude MUST perform these steps:

Step 1: Check MCP Availability

Test if MCP tools are available:

Try to access the oas_parse MCP tool with a minimal request:

• If the tool exists and responds → MCP is installed, proceed
• If tool not found or connection error → MCP not installed, go to Step 2

Quick check method:

Call: mcp__oas__oas_status with { "project_dir": "." }

• Success (any response) → MCP installed
• Error "Unknown tool" or "MCP not found" → Not installed

Step 2: MCP Not Installed - Notify and Offer Installation

Display installation prompt:

+----------------------------------------------------------+
|  OpenAPI Sync MCP Required                               |
+----------------------------------------------------------+

The OAS plugin requires the OpenAPI Sync MCP server.

Installation options:

1. npm (Recommended)
   npm install -g @jhlee0409/openapi-sync-mcp

2. Manual
   Download from: https://github.com/jhlee0409/openapi-sync-mcp/releases

Would you like me to install it now via npm? [Y/n]

Step 3: Auto-Install (if user confirms)

If user confirms installation:

npm install -g @jhlee0409/openapi-sync-mcp

Post-install configuration:

After npm install, the MCP server needs to be added to Claude's config.

MCP server installed!

To complete setup, add to your Claude config:

~/.claude.json (or project .mcp.json):
{
  "mcpServers": {
    "oas": {
      "command": "openapi-sync-mcp",
      "args": []
    }
  }
}

Then restart Claude Code.

Step 4: Verify Installation

After installation, verify:

Call: mcp__oas__oas_status with { "project_dir": "." }

• Success → Continue to original command
• Failure → Show troubleshooting guide

Step 5: Troubleshooting (if verification fails)

MCP verification failed. Troubleshooting:

1. Check binary is in PATH:
   which openapi-sync-mcp

2. Check Claude config:
   cat ~/.claude.json | grep -A5 "oas"

3. Restart Claude Code after config change

4. Manual test:
   openapi-sync-mcp --help

Still having issues?
https://github.com/jhlee0409/openapi-sync-mcp/issues

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INTEGRATION WITH COMMANDS

Each /oas:* command MUST invoke this skill at the start:

## EXECUTION INSTRUCTIONS

When this command is invoked:

### Step 0: MCP Dependency Check
**Invoke skill: mcp-dependency**
- If MCP not available, skill will handle installation
- Only proceed to Step 1 after MCP is confirmed available

### Step 1: ... (original first step)

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SKIP CONDITIONS

Skip MCP check if:

• User explicitly says "skip mcp check"
• Environment variable OAS_SKIP_MCP_CHECK=1 is set
• Previous command in same session already verified MCP

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ERROR MESSAGES

Scenario	Message
MCP not installed	"OpenAPI Sync MCP server is not installed."
Install failed	"Failed to install MCP server: {error}"
Config missing	"MCP installed but not configured in Claude."
Binary not found	"MCP binary not found in PATH."

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OUTPUT

On success:

MCP server verified (ready)

On installation:

MCP server installed and configured (ready)

On failure:

MCP server unavailable
Please install manually: npm install -g @jhlee0409/openapi-sync-mcp