Write a regex pattern that matches the described pattern. Explain each component, provide test cases that should match and not match, and note any edge cases or limitations.

Explain this code in plain language. Cover: what it does, how it works step by step, any edge cases or bugs, performance characteristics, and suggestions for improvement.

Review this code change. Check for: bugs, security issues, performance problems, edge cases, missing error handling, test coverage gaps, and style inconsistencies. Prioritize findings by severity.

Generate unit tests for this code. Include: happy path tests, edge cases, error conditions, and boundary values. Use [testing framework]. Provide both the test cases list and the actual test code.

Triage this bug report. Provide: likely root causes ranked by probability, steps to reproduce, affected components, severity assessment, suggested debugging steps, and a proposed fix approach.

Write API documentation for this endpoint. Include: description, method, URL, headers, request parameters with types, request body schema, response schema, example request/response, error codes, and rate limits.

Write a commit message for this change. Follow conventional commits format (type: subject). Include a concise subject line under 72 chars and a body explaining what changed and why.

Explain this repository to a new engineer. Summarize the purpose, core modules, main entry points, and where I should look first.

Triage this issue. Extract the problem, likely root causes, missing details, repro steps, and the best next debugging actions.

Review this PR like a senior engineer. Prioritize bugs, behavioral regressions, edge cases, and missing test coverage.

Write 5 concise commit message options for this change, including one conventional-commit style version.

Turn these commits into user-facing release notes with highlights, fixes, breaking changes, and upgrade notes.

Create a refactor plan for this code. Minimize risk, preserve behavior, and suggest checkpoints after each step.

Write a regex for this pattern, explain each part, and include examples that should and should not match.