A collection of agents and skills for common Claude Code development tasks, including code review, security checks, refactoring, teaching, and Git work.

Use it for commits, security audits, multi-angle reviews, code simplification, tutoring, prototypes, diff explanations, and session handoffs.

It groups several development workflows in one add-on instead of requiring separate tools for each task.

essentials — Plugin for Claude Code by nicknisi/claude-plugins

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.

Clone the repo

git clone --depth 1 https://github.com/nicknisi/claude-plugins

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/nicknisi/claude-plugins/essentials/github.svg)](https://agentmods.dev/plugins/nicknisi/claude-plugins/essentials)

Your own site

<a href="https://agentmods.dev/plugins/nicknisi/claude-plugins/essentials"><img src="https://agentmods.dev/badge/plugins/nicknisi/claude-plugins/essentials/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/nicknisi/claude-plugins/essentials"><img src="https://agentmods.dev/badge/plugins/nicknisi/claude-plugins/essentials.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured The manifest loads nothing itself; its 6 skills, 4 agents cost 1,539 tokens a session between them.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

essentials 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 2mo 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.

plugins/essentials/.claude-plugin/plugin.json · 40 lines

What it actually says

{
  "name": "essentials",
  "version": "0.21.0",
  "description": "Essential agents and skills for Claude Code workflows - git commits, code simplification, security audits, verified multi-lens code review, thermo-nuclear code-quality review, Socratic tutoring, prototyping, diff explainers, and session handoffs.",
  "author": {
    "name": "Nick Nisi",
    "email": "[email protected]"
  },
  "keywords": [
    "git",
    "commit",
    "semantic-commit",
    "security",
    "audit",
    "vulnerability",
    "code-review",
    "squad-review",
    "verified-review",
    "socratic-tutor",
    "teach",
    "learning",
    "simplify",
    "refactor",
    "maintainability",
    "code-quality",
    "thermo-nuclear",
    "code-judo",
    "handoff",
    "context",
    "session",
    "prototype",
    "spike",
    "poc",
    "explain-diff",
    "explain",
    "diff",
    "walkthrough"
  ]
}

Contents

What it installs

The manifest is a name and a version. 6 skills, 4 agents travel with it, and installing the plugin installs all of them — 1,539 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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.

2mo ago First seen · 40 lines scan A 7f905db3731f

Subscribe to this mod's changes

essentials is a plugin published in the GitHub repository nicknisi/claude-plugins (114 stars, last pushed 2mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-30.

Building agents Code review

essentials next to 6 plugins from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
essentialsnicknisi/claude-plugins	Plugin	114	2mo ago	MIT	A	—	Claude Code
han-communicationtestdouble/han	Plugin	339	6d ago	MIT	A	—	Claude Code
pedantic-coderoborchers/fractional-cto	Plugin	36	12d ago	MIT	A	—	Claude Code
ai-infra-auto-driven-skillsBBuf/AI-Infra-Auto-Driven-SKILLS	Plugin	1.1k	today	none	A	—	Claude Code
git-prCasper-Studios/casper-marketplace	Plugin	15	8d ago	MPL-2.0	A	—	Claude Code
code-qualitydanielbodnar/skills	Plugin	2	3mo ago	MIT	A	—	Claude Code
coderabbitThrownLemon/claude-code-plugins	Plugin	2	4mo ago	MIT	A	—	Claude Code