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llm-echo 0.5.

Simon Willison's WeblogAnalysis or commentary·
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Simon Willison released version 0.5 of llm-echo, a debug plugin that provides a "model" which does not involve an LLM and simply repeats back prompts fed to it.

Written by AI from Simon Willison's Weblog's published text.

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“Release: llm-echo 0.5 I'm working towards a new LLM release, and testing PRs caused me to revisit the llm-echo debug plugin. This plugin provides a "model" which doesn't involve an LLM at all - it just repeats back the prompts that have been fed to it.”
Simon Willison's Weblog, 18 Oct 2026, 23:16.

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