Claude Code adds support for OpenAI Agents.md format
Claude Code now accepts instructions written in OpenAI's Agents.md format, making it easier for teams that run multiple AI coding models to reuse existing prompt assets. The change should lower migration effort, but the article notes that format compatibility does not guarantee identical output quality; Claude may still interpret instructions differently, especially in edge cases.
Key points
- Claude Code now reads OpenAI Agents.md, reducing prompt‑porting effort for multi‑model projects
- AI coding tool adoption reached 84% according to Forbes Japan, but review costs may rise
- Claude Code may produce confident but slightly incorrect code; overconfidence detection tools exist but vary in coverage
Forbes Japan reports an 84% adoption rate for AI coding tools, indicating that many developers rely on such assistants daily. However, the author cites Business Insider and internal observations that faster code generation can increase review workload, as developers may trust plausible‑looking code that contains subtle bugs. A free overconfidence‑detection tool mentioned on MakeUseOf can flag suspicious output, though its effectiveness with Claude Code is uncertain. Comparisons with Gemini Spark suggest Claude excels at long‑form instruction following, while Gemini is faster, shifting selection criteria toward review safety rather than raw speed.
The story so far
2 episodes →- Claude Code adds support for OpenAI Agents.md formatthis story
Practical Challenges in AI Coding Indicated by Claude Code's Support for Agents.md
note.com · 21 September 2026
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