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powershell/PSReservedCmdletChar is a PSScriptAnalyzer diagnostic emitted by tally for PowerShell snippets embedded in Dockerfiles.
tally disables this rule by default for Dockerfile RUN snippets because a RUN executes statements inline rather than defining cmdlets, parameters, or modules with external callers. Re-enable it with include = ["powershell/PSReservedCmdletChar"] or by setting rules.powershell.PSReservedCmdletChar.severity = "warning" in .tally.toml.

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Description

You cannot use following reserved characters in a function or cmdlet name as these can cause parsing or runtime errors. Reserved Characters include: #,(){}[]&/\\$^;:\"'<>|?@`*%+=~

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How

Remove reserved characters from names.

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Examples

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Problematic code

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Correct code

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Source

This rule documentation is adapted from Microsoft’s PSScriptAnalyzer documentation for ReservedCmdletChar, licensed under CC BY 4.0.