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GuidelinesForNewRules.md

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Contribution Guidelines

Guidelines for contributing a new Code Analysis (CA) rule to the repo

  1. File an issue describing your proposed rule prior to working on a PR. This will ensure that the rule gets triaged and there is no duplicate work involved from an existing rule OR another contributor working on a similar rule.

    1. For .NET API related analyzer suggestions, please open an issue at dotnet/runtime/issues with code-analyzer label.
    2. For non-API related analyzer suggestions, please open an issue in this repo over here.

  2. Newly proposed rule would be tagged with Needs-Review label. An Approved-Rule label indicates that the proposal has been reviewed and a PR to implement the rule would be accepted.

  3. Follow the below steps to choose the appropriate rule ID for the new rule:

    1. Choose the applicable 'category' for the new rule. See DiagnosticCategoryAndIdRanges.txt for current diagnostic categories, and the CA IDs currently in use for each category.
    2. Choose the next available CA ID for the chosen 'category' from DiagnosticCategoryAndIdRanges.txt. For example, while adding a new rule in the Performance category, if CA1800-CA1829 represents the current CA ID range in DiagnosticCategoryAndIdRanges.txt, then:
      1. Choose CA1830 as the rule ID for your rule.
      2. Update the range for Performance in DiagnosticCategoryAndIdRanges.txt to CA1800-CA1830

    You can refer to the official documentation for all released CA rules by rule category.

  4. Documentation requirements:

    1. New CA rule must be documented: Each rule ID CAxxxx is automatically assigned the help link https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/caxxxx. The documentation for this page is populated from caxxxx.md file at dotnet/docs quality-rules folder. For example, CA1000 is documented at ca1000.md file. Documenting a new rule is primarily ensuring a PR is sent to dotnet/docs repo to add caxxxx.md file for the new rule. Detailed steps are given below.
    2. Documentation PR must be submitted within ONE WEEK of the rule implementation being merged. Note that we will communicate this requirement on each PR contributing a new CA rule. We reserve the right to revert the rule implementation PR if this documentation requirement is not met.

Guidelines for creating documentation PR

  1. Documentation PR must be submitted to the dotnet/docs repo:

    Please review Contribute docs for .NET code analysis rules to the .NET docs repository for guidelines.

If for some exceptional reason you are unable to submit a PR, please file a documentation issue to add documentation for the rule in future. Please include all relevant information in the issue to allow the documentation experts to easily author the documentation.