The cron scheduler's run_job() loaded config.yaml with yaml.safe_load()
but never called _expand_env_vars(), so ${HERMES_MODEL} and similar
references in model:, fallback_providers:, and other config.yaml fields
were forwarded to the LLM API as literal strings, causing HTTP 400 errors.
The normal CLI path has always called _expand_env_vars() via load_config(),
so this was a cron-only gap. The .env load at the top of run_job() already
populates os.environ before config.yaml is read, so the expansion sees the
correct values.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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