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Baseline Widely available Fully supported by every tracked agent since Jan 2026, when GitHub Copilot added it. Based on web.dev's Baseline
File & Code Built-in Tools
Supported
Partial
No
Unknown
Not released
Claude Code Current · Oct 2026 
Codex Current · Oct 2026 
GitHub Copilot Current · Oct 2026 
Cursor Current · Oct 2026 
OpenCode Current · Oct 2026 0.2.31 - 2.1.311
0.2.0 - 0.164.0
0.0.374 - 1.0.103
0.45 - 3.27
0.1.30 - 1.19.4
Supported by all 5 agents.
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