Understand: Diff
Analyzes a git diff or PR to summarize changes, affected components, and risks.
Test report
- Verdict
- Works with setup
- Score
- Tested
- Jul 11, 2026
- Environment
- Claude Code 2.x (agent harness)
- Upstream re-checked
- Aug 10, 2026 · 13880f3
Re-tested against upstream HEAD (2026-07-17), which added a graph-freshness gate before impact analysis. Re-ran the A/B on a fixture repo with an uncommitted session change and a graph pinned to an older commit: both arms produced equivalent changed/affected/layer/risk reports on the small graph, but the skill arm now catches something the baseline never surfaces -- executing its verbatim freshness commands revealed the graph predated a login() MFA change, preventing a silently wrong blast-radius call, and it wrote the documented diff-overlay.json dashboard artifact. That moves output from no-difference to a small demonstrated edge (5 to 6). The verdict stays setup because the skill is still inert without a knowledge graph from the sibling /understand skill, which this install command does not provide; SKILL.md discloses this upfront. Stage 0 clean -- the added bash is read-only git inspection.
Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works
- Installs cleanly 5/5
- Triggers reliably 4/5
- Output vs. baseline 6/10
- Docs & honesty 5/5
What Understand: Diff does
Use when you need to analyze git diffs or pull requests to understand what changed, affected components, and risks
How to install Understand: Diff
git clone https://github.com/Egonex-AI/Understand-Anything
cd Understand-Anything
mkdir -p ~/.claude/skills
cp -r understand-anything-plugin/skills/understand-diff ~/.claude/skills/understand-diff
Skills live in ~/.claude/skills/ (global) or .claude/skills/
(per-project). Restart Claude Code after installing.
Commands — how to trigger Understand: Diff
-
/understand-diffAnalyzes a git diff or PR to summarize changes, affected components, and risks.
It also activates on plain-language prompts like these:
-
Explain what this pull request actually changes -
Summarize the risk in this git diff before merging -
What components does this PR touch and why
Frequently asked questions
- Is the Understand: Diff skill free?
- Yes. The skill itself is free from Egonex-AI/Understand-Anything. SkillProof publishes the install command and an independent test verdict at no cost.
- Does Understand: Diff work with Claude Code?
- We tested it with Claude Code 2.x (agent harness) on Jul 11, 2026. Verdict: Works with setup. Re-tested against upstream HEAD (2026-07-17), which added a graph-freshness gate before impact analysis. Re-ran the A/B on a fixture repo with an uncommitted session change and a graph pinned to an older commit: both arms produced equivalent changed/affected/layer/risk reports on the small graph, but the skill arm now catches something the baseline never surfaces -- executing its verbatim freshness commands revealed the graph predated a login() MFA change, preventing a silently wrong blast-radius call, and it wrote the documented diff-overlay.json dashboard artifact. That moves output from no-difference to a small demonstrated edge (5 to 6). The verdict stays setup because the skill is still inert without a knowledge graph from the sibling /understand skill, which this install command does not provide; SKILL.md discloses this upfront. Stage 0 clean -- the added bash is read-only git inspection.
- What is the Understand: Diff SkillProof Score?
- 8.0/10 — installs cleanly 5/5, triggers reliably 4/5, output vs. baseline 6/10, docs & honesty 5/5.
- How do I install Understand: Diff?
- Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
- Can I use Understand: Diff with Cursor, Copilot, Gemini CLI, Codex or other AI tools?
- The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.