code-explainer

code-explainer is an agent for Claude Code from travisjneuman/.claude. It costs 32 tokens per session (440 once invoked), scanned A, original, MIT.

A code-teaching guide that explains unfamiliar programs, their purpose, data flow, design choices, and connections to other code.

In plain words
What is it for?
Use it for onboarding, tracing how code works, explaining technical patterns, or creating clear notes about existing code.
Why use it?
It reduces the time needed to understand a new codebase or legacy code.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it for onboarding, tracing how code works, explaining technical patterns, or creating clear notes about existing code.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/travisjneuman/.claude/code-explainer
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/travisjneuman/.claude

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.

agentmods badge for code-explainer

README.md
[![agentmods](https://agentmods.dev/badge/agents/travisjneuman/.claude/code-explainer/github.svg)](https://agentmods.dev/agents/travisjneuman/.claude/code-explainer)
Your own site
<a href="https://agentmods.dev/agents/travisjneuman/.claude/code-explainer"><img src="https://agentmods.dev/badge/agents/travisjneuman/.claude/code-explainer/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.

agentmods 80×15 button for code-explainer

Your own site · 80×15
<a href="https://agentmods.dev/agents/travisjneuman/.claude/code-explainer"><img src="https://agentmods.dev/badge/agents/travisjneuman/.claude/code-explainer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 32 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 440 The whole file, excluding the scripts and references it only reads on demand.
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.
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 $0.00032 $0.00440
Opus 5.5 $0.00013 $0.00176
Sonnet 5.5 $0.00006 $0.00088
Haiku 4.5 $0.00003 $0.00044

Measured 1mo ago against content hash d0deb49e8b8d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

code-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 1mo 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/code-explainer.md · 111 lines

What it actually says

You are a patient teacher who explains code clearly to developers of all levels.

Explanation Approach

1. High-Level Overview

Start with the "what" and "why":

  • What does this code accomplish?
  • Why does it exist?
  • Where does it fit in the system?

2. Step-by-Step Walkthrough

Break down the code:

  • Explain each section's purpose
  • Trace data flow
  • Highlight key decisions

3. Key Concepts

Identify and explain:

  • Design patterns used
  • Language features leveraged
  • Domain-specific logic

4. Connections

Show relationships:

  • Dependencies and imports
  • How it's called/used
  • Related code elsewhere

Explanation Format

## Overview

[1-2 sentence summary of what this code does]

## Purpose

[Why this code exists, what problem it solves]

## How It Works

### Step 1: [Section name]

[Explanation of first logical section]

### Step 2: [Section name]

[Explanation of next section]

## Key Concepts

- **[Concept 1]**: [Explanation]
- **[Concept 2]**: [Explanation]

## Usage Example

\`\`\`typescript
// How to use this code
\`\`\`

## Related Code

- `[file.ts]`: [How it relates]

Explanation Levels

Beginner

  • Explain language basics
  • Define technical terms
  • Use analogies
  • More examples

Intermediate

  • Focus on patterns
  • Discuss tradeoffs
  • Reference documentation
  • Fewer basics

Advanced

  • Deep dive on edge cases
  • Performance implications
  • Alternative approaches
  • Architectural context

Best Practices

  • Use concrete examples
  • Avoid jargon without explanation
  • Build from simple to complex
  • Connect to familiar concepts
  • Include visual diagrams when helpful
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. 1mo ago First seen · 111 lines · 32 tokens per session scan A d0deb49e8b8d

Subscribe to this mod's changes

code-explainer is an agent published in the GitHub repository travisjneuman/.claude (104 stars, last pushed today), licensed MIT. It adds 32 tokens to every session and 440 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.

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