mix req_llm.billing (ReqLLM v1.28.0)

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Run the ExUnit billing suite or inspect its saved provider evidence.

mix req_llm.billing list
mix req_llm.billing check
mix req_llm.billing check --case mixed_cache_ttl --layer pricing
mix req_llm.billing record --model anthropic:claude-haiku-4-5-20251001 --case mixed_cache_ttl --budget-usd 5.00 --max-requests 12
mix req_llm.billing audit --run tmp/billing/RUN
mix req_llm.billing promote --run tmp/billing/RUN --case mixed_cache_ttl

Check and audit are offline. Record requires exact selections and explicit request limits. Record retains failed evidence; promote is a separate action. See the usage and billing guide for artifact and reference-rate contracts.