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Claude Code 2.1.277 can now read AGENTS.md when a project does not have a CLAUDE.md . For teams that move between Codex, Cursor, Gemini CLI, and Claude Code, the change can remove a duplicate set of build, test, and contribution instructions. It does not mean every instruction file is automatically merged or that every Claude Code environment supports the feature in the same way. This guide uses Anthropic’s release, memory documentation, and published built-in plugin notes checked on September 19, 2026. Version 2.1.277 shipped on September 18. A Hacker News discussion about the change had 605 points and 214 comments when checked, which is useful evidence of developer interest, not evidence that the implementation is flawless. What changed: AGENTS.md is now the default fallback AGENTS.md is a plain Markdown file for the information a coding agent needs before changing a repository: setup commands, tests, style rules, security boundaries, and completion criteria. It complements the...

한국어로 읽기 Claude Code often starts with a few repository-specific instructions: a test command, a review checklist, or a preferred report format. Keeping those rules in a project’s .claude/ directory is usually the fastest way to learn whether they are useful. Once the same workflow is needed across repositories or by several people, copying those files becomes hard to maintain. A Claude Code plugin is a self-contained, versionable package for sharing skills and other components consistently. This guide explains when to keep configuration local, how to build and test a small plugin, and how to share it safely. Its review-only example makes the scope, output, and boundaries clear. A conceptual plugin layout: the manifest is .claude-plugin/plugin.json , while skills live at the plugin root under skills/ . Project-specific configuration or plugin? Claude Code supports both standalone configuration and plugins. A project’s .claude/ directory is well suited to personal workflows, q...

Diagram Design is a third-party skill/plugin for coding agents that turns a written brief into an HTML file with inline SVG diagrams. It is not a standalone web-based diagram editor. Its useful promise is narrower: give an agent a specific process and visual direction, then review an editable browser-ready diagram rather than starting from a blank canvas. Three practical takeaways Use in-session slash commands for Claude Code and terminal CLI commands for Codex. Describe the flow, constraints, and output path before asking for drawing. Treat every generated diagram as a draft: verify logic, labels, privacy, and export needs yourself. What it does, and what it does not do The plugin can create several diagram layouts and produces static HTML by default. The inline SVG approach makes the result convenient to open, inspect, and share. Keep the request focused on the decision or process the reader must understand. Existing Mermaid, ...