GitHub / Microsoft · VS Code agent mode · JetBrains, Visual Studio & others · Copilot CLI · Copilot coding agent (github.com)

GitHub Copilot rules files explained

Which instruction files GitHub Copilot reads (.github/copilot-instructions.md, .github/instructions/*.instructions.md, AGENTS.md), where to put them, and how to convert from other agents.

Files Copilot reads

.github/copilot-instructions.md
.github/instructions/*.instructions.md
AGENTS.md

AGENTS.md: Yes.

Who reads what

Agent	Rules files	AGENTS.md
Claude	`CLAUDE.md, .claude/rules/*.md`	Only when no CLAUDE.md exists (per research notes, Oct 2026; verify)
Codex	`AGENTS.md`	Yes (AGENTS.md originated here)
Cursor	`.cursor/rules/*.mdc, AGENTS.md, .cursorrules (legacy)`	Yes
Copilot	`.github/copilot-instructions.md, .github/instructions/*.instructions.md, AGENTS.md`	Yes
Antigravity	`GEMINI.md, AGENTS.md`	Yes (per research notes; verify)

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What changed across coding agents this week

Limit and pricing changes, new MCP servers, and setup fixes for Claude Code, Codex, Cursor, Copilot and Antigravity.

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