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`GateStep.validate` rejects a non-list (or empty) `options` and requires every option to be a string, but the engine does not auto-validate before `execute`. On an unvalidated run a scalar/dict/None `options` reached `_prompt` and crashed the whole workflow with a raw `TypeError` (`enumerate`/`len` on a non-iterable) or `KeyError` (indexing a dict); an empty list spun `_prompt`'s input loop forever; a non-string option crashed the reject check at `choice.lower()` with `AttributeError`. Guard `execute` to FAIL the step cleanly instead, before the non-TTY PAUSE short-circuit so the error surfaces in CI too rather than pausing and only crashing later on interactive resume. Mirrors the switch 'cases' and command 'input' unvalidated-execute guards. Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
518 KiB
518 KiB