Every instrument

Find the defect, return the patch.

Paste a function that misbehaves. Get a corrected version plus a line-by-line account of what was wrong and why the fix holds.

• Root-cause explanation per defect
• Side-by-side line diff of the patch
• Edge cases the fix now covers

Time and space, stated plainly.

Get Big-O time and space complexity with the reasoning behind it and concrete rewrites that lower the cost.

• Time and space in Big-O notation
• Per-function cost breakdown
• Rewrites with the new bound stated

Read unfamiliar code in one pass.

Turn a snippet into documentation: what it does, why it is built that way, what it costs, and where it will hurt.

• Plain-English walkthrough
• Preconditions and side effects
• Risks and sharp edges called out

Port code without losing the idiom.

Translate between twelve languages using each one's conventions rather than transliterating syntax.

• Idiomatic target-language output
• Notes on behaviour changes
• Twelve source and target languages

Describe the question, get the query.

Write the question in English, get a production-shaped query with an explicit schema assumption you can correct.

• Formatted, runnable SQL
• Stated schema assumptions
• Indexes worth adding

Build it, break it, understand it.

Compose a pattern, test it against real text with every match highlighted, and get a line-by-line breakdown in English.

• Live match highlighting and counts
• Per-token breakdown in English
• Reusable patterns for common cases