An AI coding mentor that explains code, teaches programming concepts, gives practice tasks, and reviews code for learning.

Use it to get code explanations, work through exercises, and receive educational feedback on your code.

It helps when you want to understand unfamiliar code or improve your skills without relying on generic lessons alone.

code-tutor — Plugin by sigistry

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.

Claude Code

/plugin marketplace add sigistry/marketplace

agentmods

npx agentmods add plugins/sigistry/marketplace/code-tutor

Clone the repo

git clone --depth 1 https://github.com/sigistry/marketplace

Made for: Claude Code.

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

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

code-tutor 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 yesterday.

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/code-tutor/.claude-plugin/plugin.json · 11 lines

What it actually says

{
  "name": "code-tutor",
  "version": "1.0.0",
  "description": "AI-powered code learning and mentoring system with interactive teaching, code explanations, practice exercises, and educational code reviews",
  "author": {
    "name": "Sigistry Code Tutor",
    "url": "https://github.com/Sigistry/marketplace/tree/main/plugins/code-tutor"
  },
  "license": "MIT"
}

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.

yesterday First seen · 11 lines scan A 830897258fa7

Subscribe to this mod's changes

code-tutor is a plugin published in the GitHub repository sigistry/marketplace (3 stars, last pushed 3d 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 2026-08-31.

Learning and teaching agent-skills claude claude-code claude-code-marketplace claude-code-plugin marketplace

workflow

Session workflow helpers and deferred-work backlog - knowledge capture, confusion handling, course correction, clipboard copy, backlog items.

umputun/cc-thingz · not measured

netresearch-claude-code-marketplace

Curated Agentic Skills for AI coding agents — TYPO3, PHP, Go, Docker, Jira, security, and more. Platform-agnostic skills following the open Agent Skills specification.

netresearch/claude-code-marketplace · not measured

learnable

Learn any subject properly, in courses you actually finish. Four commands: learn is the way in and the way back, new-course researches a whole domain with a fleet of agents and turns it into a taxonomy and a plan aimed at your real gaps, self-assess measures your true level with a scenario quiz that cannot be gamed…

smk-labs/claude-plugins · not measured

code-tutor