mix credence.gen.rule
(credence v0.7.1)
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Generate a correctly-shaped rule plus its test files for a type.
mix credence.gen.rule <Name> [--type pattern|syntax|semantic]<Name> may be NoFooBar or no_foo_bar. --type defaults to pattern.
The generated tests are intentionally red: they carry real assertions that
fail against the empty stub, so mix test shows you exactly what to fill in,
while every structural meta gate (naming, positive+negative, whole-string fix,
heredoc fixtures, …) already passes. No registration step — rules are
auto-discovered by their @behaviour.
If any target file already exists, the task writes nothing and aborts.