Ali jawwad fb796c2a39 fix(workflows): shell step validate() rejects non-string run (#3348) ...

ShellStep.validate() only checked that 'run' was present, so run: (null)
or a GitHub-Actions-style list validated clean; execute() then
str()-coerces the value and invokes it under shell=True, literally
running 'None' or "['echo', 'hi']" as a command. Add a type check after
the presence check, mirroring the command-step (#3262) and gate options
validation. Expression strings ('{{ ... }}') are strings, so they stay
valid.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

2026-07-07 14:48:26 -05:00

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