- Remove bidirectional fuzzy match in getModelCosts that could return
wrong pricing when a short canonical name prefix-matched a longer key
- Use explicit undefined check in parseLiteLLMEntry so free models with
zero cost are not silently dropped from the LiteLLM pricing database
- Destroy read stream in finally block of readSessionLines to prevent
file descriptor leaks when the generator is abandoned early
- Extend CSV injection escaping to cover tab and carriage-return prefixes
- Add optional chaining fallback for empty periods in exportCsv/exportJson
- Add regression tests for all fixes (models, export, fs-utils)
