Fix Issues Across Security, Performance, Observability

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Your question is Fix Issues Across Security, Performance, Observability. Start with the requirements on the right.

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Problem

Figure out and fix 5 issues spanning security, performance, and observability in a new codebase within 90 minutes using AI assistance.

Asked in the Technical Interview stage. 90-minute AI-assisted codebase debugging session.

Task

You are given a small Python codebase as a list of source files. Each file is a string. Return the corrected version of the codebase after fixing exactly 5 issues. The issues may involve unsafe input handling, inefficient logic, missing logging or metrics, or other correctness problems that affect production readiness.

Input

files: dict[str, str], mapping file names to Python source code.

Output

Return dict[str, str] with the same keys and corrected source code values.

Requirements

Fix exactly 5 issues.
Preserve the public function names and file names.
Prefer minimal changes that improve safety, runtime behavior, and observability.
The corrected code must remain valid Python.

Constraints

1 <= len(files) <= 10
Total source length across all files is at most 20,000 characters
Each file contains valid Python syntax before and after fixes
Exactly 5 issues are present in the input codebase

Function Signature

def fix_codebase(files):

Your solutionPython 3

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