security-code-audit-review-diff

security-code-audit-review-diff is a skill for Claude Code from mfakbar127/agent-skills. It costs 55 tokens per session (726 once invoked), scanned A, original, no licence file.

A security review skill for examining code changes in Git. A diff is the list of additions, edits, and removals between versions of a project.

In plain words
What is it for?
Use it to review pull-request changes, staged files, recent edits, or a proposed pre-commit security check.
Why use it?
It helps identify security risks in recent changes before they are committed or merged.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the security-code-audit plugin — 7 skills, 3 commands, 1 agent shipped together

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/mfakbar127/agent-skills/security-code-audit-review-diff
Any agent
npx skills add mfakbar127/agent-skills --skill security-code-audit-review-diff
Clone the repo
git clone --depth 1 https://github.com/mfakbar127/agent-skills

Made for: Claude Code.

Or install security-code-audit, the plugin that ships this one along with the rest of its 7 skills, 3 commands, 1 agent.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for security-code-audit-review-diff

README.md
[![agentmods](https://agentmods.dev/badge/skills/mfakbar127/agent-skills/security-code-audit-review-diff.svg)](https://agentmods.dev/skills/mfakbar127/agent-skills/security-code-audit-review-diff)
Your own site
<a href="https://agentmods.dev/skills/mfakbar127/agent-skills/security-code-audit-review-diff"><img src="https://agentmods.dev/badge/skills/mfakbar127/agent-skills/security-code-audit-review-diff.svg" alt="Measured on agentmods" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 726 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown 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 5.1 $0.00055 $0.00726
Opus 5 $0.00028 $0.00363
Sonnet 5 $0.00011 $0.00145
Haiku 4.5 $0.00006 $0.00073

Measured 5d ago against content hash abe79b6cd804, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

security-code-audit-review-diff scanned grade A with 1 finding 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 5d 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

"code_snippet": "os.system(f\"ping {user_input}\")",
plugins/security-code-audit/skills/security-code-audit-review-diff/SKILL.md · 117 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 5d ago First seen · 117 lines · 55 tokens per session scan A abe79b6cd804

Subscribe to this mod's changes

security-code-audit-review-diff is a skill published in the GitHub repository mfakbar127/agent-skills (2 stars, last pushed 5mo ago), with no licence file. It adds 55 tokens to every session and 726 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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