difit

A skill that asks the user to review code changes through difit, a tool for viewing and commenting on code differences.

In plain words
What is it for?
Opening reviews of uncommitted changes, commits, staged changes, or only the current unstaged changes.
Why use it?
It adds a user review step after changes so problems or requested adjustments can be identified before the work is finished.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/mh4gf/claude-code/difit
Any agent
npx skills add MH4GF/claude-code --skill difit
Clone the repo
git clone --depth 1 https://github.com/MH4GF/claude-code

Made for: Claude Code, Codex.

Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 630 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00017 $0.00630
Opus 5 $0.00009 $0.00315
Sonnet 5 $0.00003 $0.00126
Haiku 4.5 $0.00002 $0.00063

Measured 2d ago against content hash 8171ee2b19d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

difit scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/difit/SKILL.md · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Difit

Overview

This skill requests a code review from the user using difit. Before running commands, choose <difit-command> using the following rule:

  • If command -v difit succeeds, use difit.
  • Otherwise, use npx difit.
  • If falling back to npx difit would require network access in a sandboxed environment without network permission, request escalated permissions and user approval before running it.

If the user leaves review comments, they are printed to stdout when the chosen difit command exits. When review comments are returned, continue work and address them. If the server is shut down without comments, treat it as "no review comments were provided." Restarting it is unnecessary. Manual verification of whether the page launched correctly is also unnecessary.

Commands

  • Review uncommitted changes before commit: <difit-command> .
  • Review the HEAD commit: <difit-command>
  • Review staging area changes: <difit-command> staged
  • Review unstaged changes only: <difit-command> working

Basic Usage:

<difit-command> <target>                    # View single commit diff. ex: difit 6f4a9b7
<difit-command> <target> [compare-with]     # Compare two commits/branches. ex: difit feature main

Optional Startup Comments

If there is something you want to tell the user when difit opens, attach it as startup comments with --comment. This is useful for review findings, explanations, and any context the user should see directly on the diff.

<difit-command> <target> [compare-with] \
  --comment '{"type":"thread","filePath":"src/foobar.ts","position":{"side":"old","line":102},"body":"line 1\nline 2"}' \
  --comment '{"type":"thread","filePath":"src/example.ts","position":{"side":"new","line":{"start":36,"end":39}},"body":"Range comment for L36-L39"}'
  • Use type: "thread" for each comment.
  • Write comment bodies in the language the user is using.
  • Use position.side: "new" for lines that exist on the target side of the diff.
  • Use position.side: "old" for lines that exist only on the deleted side.
  • Use range comments for issues that span multiple lines.
  • Never copy secrets, tokens, passwords, API keys, private keys, or other credential-like material from the diff into --comment bodies or any command-line arguments.

Read the full file on GitHub · 65 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 65 lines · 17 tokens per session scan A 8171ee2b19d8

Subscribe to this mod's changes

difit is a skill published in the GitHub repository MH4GF/claude-code (2 stars, last pushed 2d ago), licensed MIT. It adds 17 tokens to every session and 630 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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