majiayu000 Milan Jovanovic Blog Skill
Overview
This skill provides access to Milan Jovanovic's curated .NET blog content, filtered to November 2025+ (aligned with .NET 10 GA). It helps developers discover and apply proven patterns for Clean Architecture, Domain-Driven Design, CQRS, Entity Framework Core, and ASP.NET Core.
Content scope: Articles published November 2025 and later, with promotional content stripped.
When to Use This Skill
Use this skill when:
- Working with .NET projects that could benefit from architectural patterns
- Implementing Clean Architecture, DDD, CQRS, or Vertical Slice patterns
- Configuring Entity Framework Core or ASP.NET Core
- Looking for proven .NET code patterns and examples
- Researching .NET 10/Aspire features
Quick Start
Search by Keywords
python scripts/core/find_articles.py search clean architecture cqrs
Filter by Tag
python scripts/core/find_articles.py tag ef-core
Resolve doc_id to Path
python scripts/core/find_articles.py resolve milanjovanovic-tech-blog-{slug}
Natural Language Query
python scripts/core/find_articles.py query "how to implement CQRS"
List Recent Articles
python scripts/core/find_articles.py list --sort date --limit 10
Tag Taxonomy
| Tag | Description |
|---|---|
clean-architecture |
Clean/Onion/Hexagonal Architecture patterns |
ddd |
Domain-Driven Design (aggregates, value objects, domain events) |
cqrs |
Command Query Responsibility Segregation |
mediatr |
MediatR library usage patterns |
ef-core |
Entity Framework Core optimization and patterns |
aspnet-core |
ASP.NET Core patterns and Minimal APIs |
modular-monolith |
Modular Monolith architecture |
vertical-slice |
Vertical Slice Architecture |
dotnet-10 |
.NET 10 features and patterns |
aspire |
.NET Aspire patterns |
result-pattern |
Result pattern for error handling |
outbox-pattern |
Transactional outbox pattern |
specification-pattern |
Specification pattern |
repository-pattern |
Repository pattern |
validation |
FluentValidation patterns |
testing |
Unit/integration testing patterns |
Path Resolution
Windows PowerShell users: Avoid cd && python chains - use absolute paths or run from repo root to prevent path doubling issues.
Script location: All scripts are in scripts/ relative to skill root.
Canonical content: Scraped articles are stored in canonical/milanjovanovic-tech/blog/.
Index Management
Check Index Stats
python scripts/management/manage_index.py stats
Verify Index Integrity
python scripts/management/manage_index.py verify
Refresh Index (After Scraping)
python scripts/management/refresh_index.py
Scraping (Use /scrape-posts Command)
For scraping operations, use the /milan-jovanovic:scrape-posts command which handles:
- Pre-filtering optimization - Parses dates from listing page before scraping individual articles
- Date filtering (November 2025+)
- Content cleanup (removes promotional sections)
- Idempotent updates (skip unchanged articles via content hash comparison)
Efficiency Optimizations
The scraping workflow uses pre-filtering to minimize firecrawl API calls:
| Scenario | Without Optimization | With Optimization | Savings |
|---|---|---|---|
| No new articles | 10+ requests | 1-2 requests | 80-90% |
| 1 new article | 10+ requests | 2-3 requests | 70-80% |
| Force (unchanged) | 10+ requests | 10+ requests (skips writes) | I/O savings |
How it works:
- Scrape listing page only (1-2 requests)
- Parse dates from listing markdown (no network)
- Compare against index to identify new articles
- Scrape ONLY articles not already indexed
Check for New Articles (Pre-Filter)
Before scraping, check what needs updating:
# Check for new articles since November 2025
python scripts/core/check_new_articles.py .claude/temp/listing.md --json --since 2025-11-01
# Force mode - include existing articles for re-check
python scripts/core/check_new_articles.py .claude/temp/listing.md --json --force
# URLs only output
python scripts/core/check_new_articles.py .claude/temp/listing.md --urls-only
Output includes to_scrape list with in_index and content_hash for smart handling.
Python API
For programmatic access, use the public API:
from milan_jovanovic_api import (
search_articles,
get_by_tag,
resolve_doc_id,
get_article_content,
)
# Search by keywords
results = search_articles(['clean-architecture', 'cqrs'])
# Get articles by tag
ef_articles = get_by_tag('ef-core')
# Resolve doc_id to path
path = resolve_doc_id('milanjovanovic-tech-blog-some-slug')
# Get article content
content = get_article_content('milanjovanovic-tech-blog-some-slug')
Content Cleanup
Scraped articles have promotional content removed:
- Sponsor sections (between title and first H2)
- Promotional footer ("Whenever you're ready, there are X ways...")
- Newsletter signup sections
- Course CTAs
- Reading time metadata
All educational content, code blocks, and internal links are preserved.
Related Components
- Command:
/milan-jovanovic:scrape-posts- Scrape new articles - Agent:
blog-advisor- Proactive project analysis and recommendations
Troubleshooting
No Results Found
- Check if index exists:
python scripts/management/manage_index.py count - If count is 0, run scrape:
/milan-jovanovic:scrape-posts - Verify tags with:
python scripts/core/find_articles.py tag --list
Path Issues on Windows
Use PowerShell or prefix Git Bash with MSYS_NO_PATHCONV=1:
MSYS_NO_PATHCONV=1 python scripts/core/find_articles.py search cqrs
Version History
- v1.1.0 (2025-12-27): Pre-filtering optimization - 80-90% reduction in firecrawl API calls
- v1.0.0 (2025-12-22): Initial release - November 2025+ articles, full tag taxonomy
Last Updated: 2025-12-27