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.
npx agentmods add skills/mh4gf/claude-code/difitnpx skills add MH4GF/claude-code --skill difitgit clone --depth 1 https://github.com/MH4GF/claude-codeWhat 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.
| Model | Per session | Once 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 |
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.
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 difitsucceeds, usedifit. - Otherwise, use
npx difit. - If falling back to
npx difitwould 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
--commentbodies or any command-line arguments.
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.
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.
- 2d ago First seen · 65 lines · 17 tokens per session scan A 8171ee2b19d8
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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