Show HN: What the Harness? LLM agent inconsistencies in MCP implementation

By gms · 2026-10-20 · 1 points · 0 comments

https://what-the-harness.polytomic.com

Hi HN, We (Polytomic) noticed that LLM agents (Claude, Codex, Grok, Amp, etc) are inconsistent in their MCP implementations. We made tables inspired by the browser-compatibility tables of yore that list the differences. Hope you find this as useful as we did!

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