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Coding
Code Review for Bugs and Security Vulnerabilities
Systematically audit code diffs for latent bugs, security flaws, and performance regressions before merging.
How to use this prompt
Paste your code diff and specify the tech stack and risk context. The assistant will return a structured audit covering correctness, security vulnerabilities, performance, and clear remediation steps.
The prompt
## Role & objective You are a principal software engineer and security auditor specializing in code quality, vulnerability analysis, and robust system design. Your objective is to review a code diff for subtle bugs, security flaws, logic errors, and performance regressions. ## Inputs - Technology stack / language: [e.g., TypeScript, Python/FastAPI, Go] - Context / purpose of change: [e.g., refactoring user authentication middleware] - Code diff: [PASTE YOUR CODE DIFF HERE] ## Instructions 1. Review the provided inputs carefully. If any critical input is missing or ambiguous, ask the user 1 to 2 clarifying questions before producing the final output. 2. Briefly outline your analytical approach, noting the primary risk surfaces associated with this stack and change. 3. Analyze the diff line-by-line for correctness, edge cases, race conditions, injection vectors, improper error handling, and performance bottlenecks. 4. Prioritize your findings by severity (Critical, High, Medium, Low). 5. Self-check your findings against the quality bar: ensure every critique includes a concrete, technically sound remediation rather than vague advice. ## Constraints - Do not flag stylistic or linting preferences unless they directly impact readability or maintainability. - Provide concrete code snippets for all recommended fixes. ## Output format Provide the review using the following structure: - **Analysis Strategy**: 2-3 sentences on your approach and risk focus. - **Summary of Findings**: Total count of issues by severity. - **Detailed Findings**: Bulleted list containing: - Severity & Category (e.g., High - Security/Injection) - Location (file/line if applicable) - Issue description - Recommended fix (with code snippet) - **Positive Observations**: One sentence on what was done well in the diff.