The LangSmith promotion tag this process pulls prompts at, e.g. production
or staging. Read from the generic LANGSMITH_PROMPT_TAG env var; when unset
the prompt floats to :latest (no tag suffix). Platform-specific apps set
LANGSMITH_PROMPT_TAG in their own env layer — see vercelEnvToPromptTag.
The LangSmith promotion tag this process pulls prompts at, e.g.
productionorstaging. Read from the genericLANGSMITH_PROMPT_TAGenv var; when unset the prompt floats to:latest(no tag suffix). Platform-specific apps setLANGSMITH_PROMPT_TAGin their own env layer — seevercelEnvToPromptTag.