Dify has no native boolean start-variable type, so a bool requirement the
Builder proposes gets emitted as a `select` — and the LLM often leaves its
`options` empty. An options-less select renders as an empty, unfillable dropdown
in the Builder's test-input form, so the user can never submit test data
(affects every workflow whose requirements include a bool field).
Add _normalize_start_select_variables to the generator postprocess (beside
_normalize_start_file_variables): a `select` start variable with no usable
(non-empty string) options is converted to a `text-input` the user can type
into; a select that declares real options is normalized to those strings and
kept. Idempotent.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Charles YaoandClaude Opus 4.8
537a38157c