Top 10 Open-Source Picks: June 15
A curated look at the 10 open-source repositories that dominated developer attention on Monday, June 15, 2026. From trending newcomers to steadily-growing community favorites, here is what mattered most.
thananon/9arm-skills
WUBING2023/PaperSpine
PaperSpine is a motivation-driven skill for learning from strong academic papers, building a paper’s central argument, and rewriting manuscripts through evidence-aware blueprints, revision matrices, and LaTeX-safe audits.
virgiliojr94/book-to-skill
Turn any technical book PDF into a Claude Code skill — ready to study, reference, and use while you work.
yetone/native-feel-skill
An Agent Skill for designing cross-platform desktop apps that feel native — distilled from Raycast's 2.0 deep-dive and reverse engineering of Raycast Beta.app. Eight architectural tenets, four-layer architecture, WebKit/WebView2 survival guide, 75-item ship audit.
nostrband/ServiceGraph
AI Agent skills to access structured datasets for startup founders
Russell-cell/PPT-Design-Prompt
ItsssssJack/power-design
A Claude skill for slides that don't look like AI made them. Brand DNA × 20 codified design principles.
realrossmanngroup/no_ai_slop_writing_rules
Claude Code reference: write in Louis Rossmann's voice, never like AI slop. Portable CLAUDE.md plus skills.
charlie947/social-media-skills
Kappaemme-git/codex-startup-pressure-test-skill
Editor's Takeaway
On June 15, 2026, these 10 repositories captured the attention of developers worldwide. Leading the charge were 9arm-skills, PaperSpine, book-to-skill alongside 7 other compelling projects, with each representing a different facet of where open-source momentum is heading. What ties them together is community trust: high star counts, active contributors, and real-world utility. If you haven't already, explore each project on its detail page, check out the contributor leaderboard, and consider starring the ones that solve problems you care about. Open source thrives when people engage, and these 10 repos are the proof.