## Summary

- Avoid sending a fallback temperature of 0 for custom models unless the
custom model has an explicit temperature configured.
- Add unit coverage for custom-model temperature handling and non-custom
fallback behavior.
- Document that new git worktrees need their own npm install before
development.

## Tests

- Not run in this metadata-only update; existing PR changes add Vitest
coverage in src/__tests__/token_utils.test.ts.

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