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How Diamond provides feedback

When Diamond identifies an issue in a pull request, it adds a comment directly on the relevant lines of code. Each comment includes:

  1. A clear description of the problem
  2. An explanation of why it matters
  3. A concrete suggestion for how to fix it

You can interact with Diamond’s comments just like comments from your teammates — respond, resolve, or suggest changes based on the feedback.

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Types of issues Diamond identifies

Diamond catches a wide range of issues that often slip through manual code review and testing:

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Logic bugs

Diamond identifies when your implementation doesn’t match the intended behavior, detecting issues like:

  • Functions that don’t accomplish what they’re named to do
  • Inconsistencies between code behavior and documentation
  • Mismatches between API usage and implementation
  • Off-by-one errors and incorrect loop boundaries

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Edge cases

Diamond finds potential failure modes that aren’t handled in your code:

  • Missing null checks or error handling
  • Race conditions in asynchronous code
  • Memory leaks and resource management issues
  • Unexpected side effects

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Security vulnerabilities

Diamond spots security issues before they reach production:

  • SQL injection vulnerabilities
  • Cross-site scripting (XSS) opportunities
  • Authorization bypass possibilities
  • Insecure cryptographic practices

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Performance issues

Diamond detects code that might cause performance problems:

  • Inefficient algorithms or data structures
  • Unnecessary API calls or database queries
  • Memory-intensive operations that could be optimized
  • N+1 query patterns

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Accidentally committed code

Diamond catches code that was likely not meant to be committed:

  • Debug statements and console logs
  • Test data and development configurations
  • Commented-out code blocks
  • Temporary workarounds

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Tracking Diamond’s impact

You can monitor Diamond’s activity and impact from the Diamond dashboard, accessible via the Diamond settings page.

The dashboard provides:

  • A feed of all comments Diamond has left across your repositories
  • Statistics on the number of PRs reviewed and issues found
  • Feedback metrics showing how often Diamond’s suggestions were applied
  • Filtering options to view comments by category or repository

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How to check Diamond’s status

For any pull request, you can see Diamond’s current status in the right-hand panel of the PR page:

Diamond will show as:

  • Running: Diamond is currently analyzing the PR
  • Completed: Diamond has finished reviewing and left any relevant comments
  • Not running: Diamond won’t analyze this PR (e.g., if the PR exceeds 100,000 characters)