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Understand Diff Analyzer

Explains what a git diff or PR changed, using a project's saved knowledge graph

Source Download skill
Repository
Egonex-AI/Understand-Anything
Stars
89,744
Licence
MIT
Files
1 file

What it does

When installed, the agent can take your uncommitted changes, a feature branch, or a pull request and check them against a saved map of your codebase (a knowledge graph built earlier by the companion /understand command). It then reports which components changed, what else depends on them, which architectural layers are touched, and a rough risk level, so you know where to review carefully. It also writes a small diff file that the companion dashboard can use to highlight changed areas.

Great for

  • Developers reviewing a large feature branch or pull request who want to see the blast radius before merging
  • Teams in a monorepo or large codebase that already ran /understand and want change-impact summaries
  • Reviewers checking which architectural layers a change touches

Skip it if

  • Projects that have not been analysed with /understand yet, since the skill stops and asks you to build the graph first
  • Small one-line fixes where a plain git diff review is faster and the graph may be out of date; a stale graph can miss recent changes
  • Security audits or definitive risk sign-off, because the risk rating is a heuristic based on node complexity and edge counts, not a verified review

Try asking

  • “Analyze the changes on my current feature branch against main and tell me what might break”
  • “Review PR #123 and list the components it affects and the layers it touches”
  • “What are the risks in my uncommitted changes? Which dependencies should I double-check?”
Step-by-step guide: how to use Understand Diff AnalyzerInstall, first run, examples, tips and FAQs

Install in 3 steps

  1. 1

    Download the skill

    The ZIP contains the 1 original files, the MIT licence and an attribution note.

    understand-diff.zip
  2. 2

    Add it to your agent

    Claude Code (all projects)

    mkdir -p ~/.claude/skills && unzip understand-diff.zip -d ~/.claude/skills/

    Claude Code / Agent SDK (this project only)

    mkdir -p .claude/skills && unzip understand-diff.zip -d .claude/skills/

    Claude apps (web/desktop): Settings → Capabilities → Skills → Upload skill, and choose the ZIP.

  3. 3

    Ask for the task

    No special command needed — the agent reads the skill's description and loads it when your request matches. Try one of the prompts above.

Get better results

  • Run /understand to refresh the graph after significant code changes, otherwise the analysis may miss recent edits; the skill will warn you when it detects drift.
  • Name the base branch explicitly (for example main or develop) if your default differs, so the comparison is correct.
  • Treat the risk rating as a starting point for review, and check the listed affected components yourself before merging.

What's inside

  • SKILL.md

Redistributed unmodified from Egonex-AI/Understand-Anything under the MIT licence. The assessment was drafted with AI from the skill's files on 2026-10-29. Skills can instruct your agent to run code — read SKILL.md and any scripts before installing.