Agent Skills Went Vendor-Neutral: Building a Writing-Quality Skill for Claude, Codex and Gemini
Agent Skills now belongs to the Linux Foundation, not to one AI company. Here's what that changes, where each agent looks for skills, and a complete writing-quality skill you can drop into Claude Code, Codex and Gemini CLI today. Image generated by AI TL;DR: On October 22, 2026, Anthropic donated the Agent Skills standard to the Agentic AI Foundation under the Linux Foundation. The SKILL.md…
On October 22, 2026, Anthropic donated the Agent Skills standard to the Agentic AI Foundation under the Linux Foundation, making it vendor-neutral. This change allows the same skill folder format, SKILL.md, to be used across Claude Code, OpenAI Codex, and Gemini CLI, eliminating the need for vendor-specific implementations. The article provides a step-by-step guide on building a writing-quality skill using a dependency-free Python checker, demonstrating how easy it is to deploy the skill across all three agents.
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