Let an LLM propose UPDATE/DELETE, then actually run it, measure the real before/after diff, and always roll back — so the human approves measured facts, not the model's claim.

Pi skill: Mermaid before/after/diff diagrams that explain what a code change actually does

diff with unified diff format handling

asynchronous before/error/after hooks for internal functionality

JSON diff

Display differences clearly so people can review changes confidently.

Colorized string diff ideal for text/code that spans through multiple lines

Parse a JSON string that has git merge conflicts, resolving if possible

Semantic configuration differ for webpack and rspack projects

Diff two arrays, finding inserts, removes, and moves

Fast Javascript text diff

Diff and markup HTML with <ins> and <del> tags

Compare items in two sequences to find a longest common subsequence

Moment.js template helpers Ember.js

A JavaScript text diff implementation.

Compare items in two sequences to find a longest common subsequence

Transforms css values and at-rule params into the tree

Syntax highlighter and diagnostic renderer for HTML+ERB templates.

Deprecated prop-types from React Native.

Debounce a function