mark contributor skills as internal

Author: clavery

.claude/skills/api-client-development/SKILL.md

@@ -1,6 +1,8 @@
 ---
 name: api-client-development
 description: Creating API clients with OpenAPI specs, authentication, and OAuth scopes for SCAPI and similar APIs
+metadata:
+  internal: true
 ---
 
 # API Client Development

.claude/skills/cli-command-development/SKILL.md

@@ -1,6 +1,8 @@
 ---
 name: cli-command-development
 description: Creating new CLI commands and topics for the B2C CLI using oclif
+metadata:
+  internal: true
 ---
 
 # CLI Command Development

.claude/skills/documentation/SKILL.md

@@ -1,6 +1,8 @@
 ---
 name: documentation
 description: Updating user guides, CLI reference, and API documentation for the B2C CLI project
+metadata:
+  internal: true
 ---
 
 # Documentation

.claude/skills/sdk-module-development/SKILL.md

@@ -1,6 +1,8 @@
 ---
 name: sdk-module-development
 description: Adding new modules and exports to the @salesforce/b2c-tooling-sdk package
+metadata:
+  internal: true
 ---
 
 # SDK Module Development

.claude/skills/skill-authoring/SKILL.md

@@ -1,6 +1,8 @@
 ---
 name: skill-authoring
 description: Guide for creating and maintaining user-facing agent skills
+metadata:
+  internal: true
 ---
 
 # Skill Authoring Guide

.claude/skills/testing/SKILL.md

@@ -1,6 +1,8 @@
 ---
 name: testing
 description: Writing tests for the B2C CLI project using Mocha, Chai, and MSW
+metadata:
+  internal: true
 ---
 
 # Testing