code-reader-v2-en

An English-language assistant for understanding source code at three levels: a quick overview, a standard explanation, or a deep study of a large project.

In plain words
What is it for?
Explaining unfamiliar code, reviewing projects, studying design and algorithms, checking understanding, and preparing for interviews.
Why use it?
It helps readers learn why code works, rather than only receiving a surface description or a list of technical terms.

Skill for Claude CodeCodex

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/notlate-cn/code-reader-skills/code-reader-en
Any agent
npx skills add notlate-cn/code-reader-skills --skill code-reader-en
Clone the repo
git clone --depth 1 https://github.com/notlate-cn/code-reader-skills

Made for: Claude Code, Codex.

Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,542 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 $0.00070 $0.06542
Opus 5 $0.00035 $0.03271
Sonnet 5 $0.00014 $0.01308
Haiku 4.5 $0.00007 $0.00654

Measured 2d ago against content hash 71b0c8cb055b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-reader-v2-en 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.

code-reader-en/SKILL.md · 723 lines

How it starts

The opening of the file, as written. The whole thing — 723 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Source Code Deep Understanding Analyzer v2.3 (English Version)

Professional code analysis tool based on cognitive science research, supporting three analysis depths to ensure true understanding rather than fluency illusion.

Core Principle: Understand WHY, not just WHAT. Explain like an experienced engineer talking to a friend, not a textbook stacking jargon.

Research Foundation: Dunlosky et al. · Chi et al. · Karpicke & Roediger


Three Analysis Modes

User Intent Mode Trigger Examples Duration
Quick browse / code review Quick "quick look", "what does this do", "briefly scan" 5-10 min
Learning / technical research Standard ⭐ "analyze", "help me understand", "explain", "what's the principle" 15-20 min
Deep mastery / large projects Deep 🚀 "thoroughly analyze", "completely master", "deep dive", "interview prep", "full project analysis" 30+ min

Default: Standard Mode. System auto-selects mode based on code scale and user intent.

Deep Mode internal strategy selection:

if lines_of_code <= 2000:
    Strategy A: Progressive generation (sequential chapter filling)
elif lines_of_code <= 10000 and file_count <= 20:
    Strategy B: Parallel processing (sub-agent chapter-level parallel)
else:  # lines > 10000 or files > 20
    Strategy C: Layered parallel (module-level scan → chapter-level parallel)

Analysis Output Structure

Quick Mode (5-10 min)

# [Code Name] Quick Analysis

## 1. Quick Overview
- Programming language and version / Code scale and type / Core dependencies

## 2. Functionality Description
- Main functionality (WHAT) + brief WHY

## 3. Core Algorithm/Design
- Complexity (if applicable) + Design patterns (if applicable) + WHY chosen

## 4. Key Code Segments
- 3-5 core code segments, brief description of each

## 5. Dependencies
- External library list and purposes

## 6. Quick Usage Example

Read the full file on GitHub · 723 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 723 lines · 0 tokens per session scan A 71b0c8cb055b

Subscribe to this mod's changes

code-reader-v2-en is a skill published in the GitHub repository notlate-cn/code-reader-skills (145 stars, last pushed 5mo ago), licensed MIT. It adds 70 tokens to every session and 6,542 once invoked, about $0.0003 per session on Opus 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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