Agent Skills we built — install them, use them, or read how
Agent Skills (the open SKILL.md standard) work across Claude, ChatGPT, Codex, and Grok Build. We researched each niche first — what already exists, where the real gap is — before building anything, and open-sourced every skill on GitHub.
Skills
3 packagesEach one is free, open-source, and installable in a couple of commands — the article covers the research behind the scope.
Credit Card Portfolio Skill
5/24 tracking, annual-fee keep/downgrade/cancel worksheets, application sequencing — the gap between card-comparison and points-redemption tools that already exist.
3 COMMANDSStudent Arrival Skill
Arrival timeline, banking without an SSN, campus-resource routing for international students — no immigration or mental-health advice, by design.
3 COMMANDSJob Search Intel Skill
Ghost-job detection, company/interviewer research, salary-range checks, and application tracking — not another resume generator.
4 COMMANDS