llm-echo 0.5

Explain Like I'm Normal

Simon Willison updated llm-echo, a debug tool that mimics an LLM by simply repeating prompts back to the user without calling an actual API. The 0.5 release now simulates complex metadata like tool calls, system prompts, and reasoning tokens to help developers test their orchestration code for free. This allows for robust local testing of LLM-based applications without burning credits or dealing with latency.