Skip to content

Skillselionwith God's help

By phase

IdeaResearch & spot demand
ValidateScope & prototype
BuildFrontend, backend, MCP
ShipTest, review, deploy
LaunchDistribution, SEO, ASO
GrowAnalytics & retention
OperateMonitoring & uptime

By type

Skills
Marketplaces
MCP servers
Workflows

Skills Marketplaces MCP Learn Brief

Browse all tools →By phase

Idea Validate Build Ship Launch Grow Operate

Explore

Skills
Marketplaces
MCP
Learn
Brief

This week for builders

Five minutes, every Monday — the tools, releases and tactics for shipping solo.

Email address

unsubscribe anytime.

Skillselion

An independent, curated directory of AI-coding tools for solo builders - skills, MCP servers, marketplaces and workflows for Claude Code, Codex and Cursor, organized by the indie build journey from idea to operate.

ResourcesBrowse Skills Browse MCP Servers Browse Marketplaces Browse Workflows Best-of shortlists Glossary State of AI Skills 2026 Weekly Brief

CommunityAbout Learn Feedback Privacy Policy Terms Cookie Policy Accessibility Cookie settings

Last updated June 10, 2026 · © 2026 Skillselion. Skillselion is an independent project and is not affiliated with Anthropic, OpenAI, Cursor, Claude, Claude Code, or Codex.

Skills/AVDLEE/CORE DATA AGENT SKILL

avdlee/core-data-agent-skill

1 skill · 1.7k installs · 272 stars · GitHub

Install

npx skills add https://github.com/avdlee/core-data-agent-skill

Skills in this repo

1Core Data ExpertCore Data Expert is an agent skill that gives production-oriented guidance for Apple’s Core Data stack on iOS and macOS. Solo and indie builders use it when they need to stand up a store correctly, debug merge conflicts and threading crashes, tune fetch performance, run batch operations without breaking the UI, plan schema migrations, or wire NSPersistentCloudKitContainer without stepping on CloudKit’s immutable production schema. The skill encodes an explicit agent contract: clarify platform and deployment target, separate view context from background work, prefer object IDs for cross-context communication, and verify persistent history when recommending batch paths. It points agents at bundled reference material rather than generic web noise, which helps Claude Code or Cursor sessions stay aligned with stack semantics that are easy to get wrong under Swift Concurrency. Use it during active app build work whenever persistence behavior is unclear or regressions show up in saves, fetches, or sync.1.7kinstalls