Skill

axiom-xcode-mcp

Routes Xcode MCP queries to setup, tools/workflows, and reference skills. Covers xcrun mcpbridge connections, tool usage (BuildProject, RunTests), and troubleshooting.

Swift

iOS

mobile

developer-tools

Install

npx claudepluginhub charleswiltgen/axiom --plugin axiom

Tool Access

This skill uses the workspace's default tool permissions.

Preview

**You MUST use this skill for ANY Xcode MCP interaction — setup, tool usage, workflow patterns, or troubleshooting.**

SKILL.md

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Stats

Parent Repo Stars717

Parent Repo Forks56

Last CommitFeb 16, 2026

Actions

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Xcode MCP Router

You MUST use this skill for ANY Xcode MCP interaction — setup, tool usage, workflow patterns, or troubleshooting.

Xcode 26.3 ships an MCP server (xcrun mcpbridge) that exposes 20 IDE tools to external AI clients. This router directs you to the right specialized skill.

When to Use

Use this router when:

Setting up Xcode MCP for the first time
Configuring xcrun mcpbridge for any MCP client
Using any Xcode MCP tool (file ops, build, test, preview)
Building, testing, or previewing via MCP tools
Troubleshooting mcpbridge connection issues
Window/tab targeting questions
Permission dialog confusion

Routing Logic

1. Setup/Connection → xcode-mcp-setup

Triggers:

First-time Xcode MCP setup
Client-specific config (Claude Code, Cursor, Codex, VS Code, Gemini CLI)
Connection errors ("Connection refused", "No windows")
Permission dialog confusion
Multi-Xcode targeting (MCP_XCODE_PID)
Schema compliance issues with strict clients

Invoke: /skill axiom-xcode-mcp-setup

2. Using Tools & Workflows → xcode-mcp-tools

Triggers:

How to build/test/preview via MCP
Workflow patterns (BuildFix loop, TestFix loop)
Tool gotchas and anti-patterns
Window/tab targeting strategy
When to use MCP tools vs CLI (xcodebuild)
Destructive operation safety (XcodeRM, XcodeMV)

Invoke: /skill axiom-xcode-mcp-tools

3. Tool API Reference → xcode-mcp-ref

Triggers:

Specific tool parameters and schemas
Input/output format for a tool
"How does XcodeGrep work?"
"What params does BuildProject take?"
Tool category listing

Invoke: /skill axiom-xcode-mcp-ref

Decision Tree

digraph xcode_mcp_router {
    rankdir=TB;
    "User has Xcode MCP question" [shape=ellipse];
    "Setup or connection?" [shape=diamond];
    "Using tools or workflows?" [shape=diamond];
    "Need specific tool params?" [shape=diamond];

    "xcode-mcp-setup" [shape=box];
    "xcode-mcp-tools" [shape=box];
    "xcode-mcp-ref" [shape=box];

    "User has Xcode MCP question" -> "Setup or connection?";
    "Setup or connection?" -> "xcode-mcp-setup" [label="yes"];
    "Setup or connection?" -> "Using tools or workflows?" [label="no"];
    "Using tools or workflows?" -> "xcode-mcp-tools" [label="yes"];
    "Using tools or workflows?" -> "Need specific tool params?" [label="no"];
    "Need specific tool params?" -> "xcode-mcp-ref" [label="yes"];
    "Need specific tool params?" -> "xcode-mcp-tools" [label="general question"];
}

Anti-Rationalization

Thought	Reality
"I'll just use xcodebuild directly"	MCP gives IDE state, diagnostics, previews, and navigator issues that CLI doesn't expose
"I already know how to set up MCP"	Client configs differ. Permission dialog behavior is specific. Check setup skill.
"I can figure out the tool params"	Tool schemas have required fields and gotchas. Check ref skill.
"Tab identifiers are obvious"	Most tools fail silently without correct tabIdentifier. Tools skill explains targeting.
"This is just file reading, I'll use Read tool"	XcodeRead sees Xcode's project view including generated files and resolved packages

Conflict Resolution (vs Other Routers)

Domain	Owner	Why
MCP-specific interaction (mcpbridge, MCP tools, tab identifiers)	xcode-mcp	MCP protocol and tool-specific
Xcode environment (Derived Data, zombie processes, simulators)	ios-build	Environment diagnostics, not MCP
Apple's bundled documentation (for-LLM guides/diagnostics)	apple-docs	Bundled docs, not MCP tool
`DocumentationSearch` MCP tool usage specifically	xcode-mcp	MCP tool invocation
Build failures diagnosed via CLI	ios-build	Traditional build debugging
Build failures diagnosed via MCP tools	xcode-mcp	MCP workflow patterns

Example Invocations

User: "How do I set up Xcode MCP with Claude Code?" -> Invoke: /skill axiom-xcode-mcp-setup

User: "How do I build my project using MCP tools?" -> Invoke: /skill axiom-xcode-mcp-tools

User: "What parameters does BuildProject take?" -> Invoke: /skill axiom-xcode-mcp-ref

User: "My mcpbridge connection keeps failing" -> Invoke: /skill axiom-xcode-mcp-setup

User: "How do I target a specific Xcode window?" -> Invoke: /skill axiom-xcode-mcp-tools

User: "Can I render SwiftUI previews via MCP?" -> Invoke: /skill axiom-xcode-mcp-tools (workflow), then /skill axiom-xcode-mcp-ref (params)

User: "Cursor can't parse Xcode's MCP responses" -> Invoke: /skill axiom-xcode-mcp-setup (schema compliance section)

Resources

Skills: xcode-mcp-setup, xcode-mcp-tools, xcode-mcp-ref