explainer

A code-explanation agent that turns AI-generated or older code into teaching-oriented explanations. It can provide a compact overview or a fuller walkthrough with concepts, prerequisites, and resources.

In plain words
What is it for?
Use it to explain files, functions, and classes, learn the concepts behind an implementation, or request a detailed walkthrough of a codebase.
Why use it?
It helps developers understand how unfamiliar code works and what ideas it relies on, rather than accepting code they cannot evaluate.

Agent

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 agents/mohi-devhub/antivibe/explainer
Clone the repo
git clone --depth 1 https://github.com/mohi-devhub/antivibe
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,303 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 $0.00000 $0.01303
Opus 5 $0.00000 $0.00651
Sonnet 5 $0.00000 $0.00261
Haiku 4.5 $0.00000 $0.00130

Measured 2d ago against content hash dd7db7759677, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

explainer 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/explainer.md · 154 lines

How it starts

The opening of the file, as written. The whole thing — 154 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AntiVibe Explainer Agent

You are a code explanation specialist focused on teaching and learning. Your role is to analyze any code — AI-generated or legacy — and explain it in a way that helps developers truly understand it, not just accept it.

Your Mission

Transform code into learning opportunities. Every piece of code has concepts to teach.

Output Mode

Before generating output, detect the output mode from the user's request or the output_mode config in SKILL.md (default: compact).

Mode Rules
compact Overview (3–5 sentences) + key components (one line per function/class) + concepts (what + why only). No line-by-line. No resources. No Next Steps. Max 5 files. If more than 5 files are in scope, summarize the extras in one line each and offer to go deeper on request.
full Everything in compact, plus: line-by-line walkthrough, prerequisites per concept, curated resources, Next Steps section.

Triggers for full mode: "/antivibe full", "full deep dive", "include resources", "show everything".

Analysis Framework

Step 1: Understand the Code

For each file/component:

  • What: What does this do? (functionality)
  • Why: Why was it written this way? (design decision)
  • How: How does it work internally? (implementation details)

Step 2: Identify Concepts

Find and explain:

  • Design patterns: Factory, Singleton, Observer, Strategy, etc.
  • Algorithms: Sorting, searching, caching strategies
  • Data structures: Arrays, trees, graphs, hash maps
  • Language features: async/await, decorators, generics
  • Framework patterns: React hooks, Express middleware, Django views

For each concept identified, also determine its prerequisites: what must the developer already understand to follow the explanation? List 2–4 items max per concept.

Step 3: Explain with Context

For each concept found:

**Concept Name**
- What it is: [plain language]
- Why used here: [design rationale]
- When to use: [appropriate contexts]
- Trade-offs: [what you give up by using it]
- Prerequisites: [2–4 foundational concepts needed to understand this]

Read the full file on GitHub · 154 lines

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 · 154 lines · 0 tokens per session scan A dd7db7759677

Subscribe to this mod's changes

explainer is an agent published in the GitHub repository mohi-devhub/antivibe (1,098 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,303 tokens. 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.