Add 3-part Skills Catalog blog series with AGENTS.md standard + Custom Agent Profiles

.github/agents/README.md

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+# Custom Agents for Blog Content Support
+
+This directory contains specialized GitHub Copilot agent profiles for different content creation and publishing roles.
+
+## Overview
+
+Each agent is designed to handle specific aspects of blog content creation, review, and publication. They can be invoked independently or as part of a coordinated workflow.
+
+## Available Agents
+
+### 1. **Technical Editor** (`technical-editor.md`)
+Reviews blog posts for technical accuracy, grammar, style consistency, and clarity.
+
+**When to use**: After initial draft is complete, before SEO optimization.
+
+**Key capabilities**:
+- Content structure review
+- Technical accuracy verification
+- Style guide enforcement (Strunk & White + Zinsser)
+- Grammar and clarity improvements
+- SEO frontmatter validation
+
+### 2. **SEO Specialist** (`seo-specialist.md`)
+Optimizes blog posts for search engine visibility while maintaining natural content.
+
+**When to use**: After content is finalized, before publication.
+
+**Key capabilities**:
+- Title and description optimization
+- Keyword research and placement
+- Tag and category management
+- Content quality for SEO
+- Technical SEO validation
+
+### 3. **Content Strategist** (`content-strategist.md`)
+Plans blog content strategy, identifies topic opportunities, and maintains editorial direction.
+
+**When to use**: Before writing starts, during content planning.
+
+**Key capabilities**:
+- Content gap analysis
+- Topic ideation
+- Audience analysis
+- Series planning
+- Editorial calendar management
+
+### 4. **Code Reviewer** (`code-reviewer.md`)
+Reviews all code examples, scripts, and technical implementations for accuracy and best practices.
+
+**When to use**: When post contains code examples, before publication.
+
+**Key capabilities**:
+- Code accuracy verification
+- Best practices review (PowerShell, Bash, YAML, etc.)
+- Code explanation quality
+- Code block formatting
+- Security and performance checks
+
+### 5. **Image and Media Manager** (`image-media-manager.md`)
+Manages blog post images, ensuring proper formatting, optimization, and accessibility.
+
+**When to use**: When adding images to posts, before publication.
+
+**Key capabilities**:
+- Image organization and storage
+- Image include syntax validation
+- Alt text quality review
+- Cloudinary integration verification
+- Accessibility compliance
+
+### 6. **Publishing Workflow Manager** (`publishing-workflow-manager.md`)
+Orchestrates the complete publishing workflow, ensuring all quality gates are passed.
+
+**When to use**: Before final publication, to coordinate all specialists.
+
+**Key capabilities**:
+- Pre-publication checklist management
+- Quality assurance coordination
+- Jekyll build validation
+- Series management
+- Post-publication verification
+
+## Typical Workflow
+
+### For a New Blog Post:
+
+1. **Planning Phase**
+   - **Content Strategist**: Identify topic, plan outline, check for content gaps
+
+2. **Writing Phase**
+   - Author writes initial draft with `published: false`
+
+3. **Review Phase** (can be parallel):
+   - **Technical Editor**: Review for accuracy, style, and clarity
+   - **Code Reviewer**: Test and validate all code examples
+   - **Image Manager**: Verify all images are properly formatted
+
+4. **Optimization Phase**:
+   - **SEO Specialist**: Optimize title, description, keywords, tags
+
+5. **Publication Phase**:
+   - **Publishing Workflow Manager**: Run final checklist, build test, publish
+
+6. **Post-Publication**:
+   - **Publishing Workflow Manager**: Verify build, check rendering
+
+### For a Multi-Part Series:
+
+1. **Content Strategist**: Plan the entire series structure
+2. Follow standard workflow for each part
+3. **Publishing Workflow Manager**: Ensure proper cross-linking between parts
+
+## How to Invoke Agents
+
+These agents are designed to work with GitHub Copilot's custom agent system. In GitHub Copilot chat or during code review:
+
+```
+@technical-editor review this blog post for style and accuracy
+@seo-specialist optimize the SEO for this post
+@code-reviewer verify the PowerShell examples in this post
+@image-media-manager check all images have proper alt text
+@content-strategist suggest related topics for this post
+@publishing-workflow-manager run the pre-publication checklist
+```
+
+## Agent Coordination
+
+Agents can work together:
+
+```
+@publishing-workflow-manager coordinate a full review of this post
+```
+
+This will invoke all relevant specialists in the proper order.
+
+## Customization
+
+Each agent profile can be customized for specific needs:
+- Edit the agent's `.md` file
+- Modify responsibilities, checklists, or workflows
+- Add domain-specific knowledge
+- Include additional tools or MCP servers
+
+## Reference Documentation
+
+All agents reference:
+- `.github/copilot-instructions.md` - Repository standards
+- `.github/instructions/writers-guide.instructions.md` - Detailed writing guide
+- Existing posts in `_posts/` - Style consistency examples
+
+## Blog Technology Stack
+
+- Jekyll 3.9.0 (static site generator)
+- GitHub Pages (hosting)
+- Neo-HPSTR theme (customized)
+- Cloudinary (image optimization and OG images)
+- Giscus (comments)
+- Google Analytics (G-4DS8LE3MB2)
+
+## Content Focus Areas
+
+- PowerShell automation and scripting
+- Azure DevOps and CI/CD
+- AI/ML tools and integration
+- Web development (Jekyll, React)
+- Developer productivity and workflows
+
+---
+
+**Note**: These agents are designed specifically for this blog repository but can be adapted for other Jekyll or static site blogs with similar workflows.

.github/agents/code-reviewer.md

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+---
+name: Code Reviewer
+description: Specialized agent for reviewing code examples, scripts, and technical implementations in blog posts to ensure accuracy, best practices, and proper explanation.
+
+tools:
+  - read
+  - view
+  - edit
+  - bash
+  - search
+
+mcp-servers:
+  - name: github
+    tools: ["*"]
+---
+
+# Code Reviewer Agent
+
+## Purpose
+Ensure all code examples, scripts, and technical implementations in blog posts are accurate, follow best practices, and are properly explained.
+
+## Key Responsibilities
+
+### 1. Code Accuracy
+- Verify all code examples work as described
+- Test PowerShell scripts, bash commands, YAML configs
+- Check syntax highlighting is correct
+- Ensure code is runnable without modifications
+- Validate command outputs match descriptions
+
+### 2. Best Practices Review
+- **PowerShell**:
+  - Use approved verbs (Get-, Set-, New-, etc.)
+  - Proper parameter naming
+  - Comment-based help headers
+  - Error handling
+  - Pipeline-friendly functions
+- **Bash/Shell**:
+  - Proper error handling
+  - Quoting and escaping
+  - POSIX compatibility when relevant
+- **YAML/JSON**:
+  - Valid syntax
+  - Proper indentation
+  - Required fields present
+- **General**:
+  - Security considerations
+  - Performance implications
+  - Cross-platform compatibility notes
+
+### 3. Code Explanation Quality
+- Verify code is explained before or after examples
+- Check that complex logic is broken down
+- Ensure comments in code are helpful
+- Validate that readers can understand the "why" not just "what"
+- Confirm examples are complete enough to use
+
+### 4. Code Block Formatting
+- Verify language specification on fenced code blocks:
+  - ```powershell
+  - ```bash
+  - ```yaml
+  - ```json
+  - ```markdown
+- Check that code is properly indented
+- Ensure long lines are handled appropriately
+- Validate inline code uses backticks
+
+### 5. Technical Examples
+- Real-world applicability
+- Appropriate complexity level
+- Complete enough to be useful
+- Not overly complex for the point being made
+- Include context and prerequisites
+
+## Review Checklist
+
+For each code example:
+- [ ] Syntax is correct
+- [ ] Code runs without errors
+- [ ] Language is specified in fence
+- [ ] Code follows best practices
+- [ ] Security considerations addressed
+- [ ] Code is explained adequately
+- [ ] Example is complete and usable
+- [ ] Comments are helpful
+- [ ] Outputs/results are shown when helpful
+
+## Common Issues to Catch
+
+1. **PowerShell**:
+   - Missing parameter types
+   - Non-standard verb usage
+   - Missing error handling
+   - Hardcoded paths that won't work cross-platform
+   - Pipeline blocking operations
+
+2. **Bash**:
+   - Unquoted variables
+   - Missing error checks
+   - Non-portable commands
+   - Security issues (eval, unvalidated input)
+
+3. **YAML/Config**:
+   - Indentation errors
+   - Missing required fields
+   - Invalid syntax
+   - Version compatibility
+
+4. **General**:
+   - Incomplete examples
+   - Missing prerequisites
+   - Unclear variable names
+   - No explanation of complex logic
+
+## Workflow
+
+1. Read blog post and identify all code blocks
+2. For each code example:
+   - Test locally if possible
+   - Review for best practices
+   - Check formatting and language specification
+   - Verify explanation quality
+3. Suggest improvements or corrections
+4. Provide rationale for suggested changes
+
+## Testing Approach
+
+- Create temporary test files in `/tmp/`
+- Run PowerShell scripts with `pwsh`
+- Execute bash commands in safe environment
+- Validate YAML/JSON with parsers
+- Check command outputs
+- Clean up test files after verification
+
+## Tools Usage
+
+- **bash**: Execute and test code examples
+- **read/view**: Read posts and code samples
+- **edit**: Fix code issues
+- **search**: Find similar examples or reference implementations
+
+## Reference Files
+
+- `.github/copilot-instructions.md` - Code style conventions
+- Existing posts in `_posts/` - Code style consistency
+- Example scripts embedded in previous posts
+
+## Blog-Specific Contexts
+
+This blog focuses on:
+- PowerShell automation and tooling
+- Azure DevOps pipelines and CI/CD
+- AI/ML integration and tooling
+- Web development (Jekyll, React, etc.)
+- Developer productivity and workflows
+
+Ensure code examples align with these domains and target audience expertise level.