Agents & InferenceSimon Willison

llm-echo 0.5

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Summary A

The llm-echo debug plugin now simulates token usage counts for tool calls, system prompts, and reasoning tokens without hitting a live model. This allows you to locally dry-run agent orchestration, token-tracking middleware, and cost-attribution pipelines without incurring API latency or costs. You can now verify how your production system handles complex reasoning outputs and metadata-heavy payloads entirely offline.