What is analysis_claude_code CLAUDE.md?

Project instructions for a research repository that studies how Claude Code version 1.0.33 is built by examining and explaining its source code. They describe the analysis folders, documents, scripts, and common work areas.

Use them when locating analysis results, processing source chunks, writing research documentation, or running the repository's analysis tools.

They give a coding agent the repository map and the intended method for working with deobfuscated and analyzed code. This reduces the chance of editing the wrong stage, report, or generated file.

How ThreeFish-AI/analysis_claude_code configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to ThreeFish-AI/analysis_claude_code. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/ThreeFish-AI/analysis_claude_code/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/ThreeFish-AI/analysis_claude_code

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/instructions/threefish-ai/analysis_claude_code/claude-md/github.svg)](https://agentmods.dev/instructions/threefish-ai/analysis_claude_code/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/threefish-ai/analysis_claude_code/claude-md"><img src="https://agentmods.dev/badge/instructions/threefish-ai/analysis_claude_code/claude-md/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/instructions/threefish-ai/analysis_claude_code/claude-md"><img src="https://agentmods.dev/badge/instructions/threefish-ai/analysis_claude_code/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 961 This file is loaded in full into every session.

When invoked 961 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00961	$0.00961
Opus 5.5	$0.00384	$0.00384
Sonnet 5.5	$0.00192	$0.00192
Haiku 4.5	$0.00096	$0.00096

Measured 2mo ago against content hash ff35f0b7a525, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

analysis_claude_code CLAUDE.md 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.

CLAUDE.md · 120 lines

How it starts

The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Repository Overview

This is a research repository containing reverse engineering analysis of Claude Code v1.0.33. The repository focuses on understanding the architecture, mechanisms, and implementation patterns of modern AI Agent systems through systematic analysis of obfuscated source code.

Project Structure

Main Analysis Workspace

claude_code_v_1.0.33/stage1_analysis_workspace/ - Complete analysis results for v1.0.33
chunks/ - Deobfuscated code chunks (102 files) split from the main CLI file
docs/ - Comprehensive technical documentation and analysis reports
scripts/ - Analysis tools and utilities for processing obfuscated code

Key Directories

analysis_results/merged-chunks/ - Optimized and merged code blocks
docs/Open-Claude-Code/ - Open source reconstruction project template
work_doc_for_this/ - Project methodology and standard operating procedures

Common Commands

Based on the analysis workspace structure, the following commands are commonly used:

Code Analysis and Processing

# Beautify and format obfuscated code
node scripts/beautify.js source/cli.mjs

# Split large files into manageable chunks
node scripts/split.js cli.beautify.mjs

# Merge and improve code chunks
node scripts/merge-again.js

# LLM-assisted analysis of code segments
node scripts/llm.js

Development Commands (Open-Claude-Code Project)

# Build TypeScript project
npm run build

# Run tests with coverage
npm run test:coverage

# Performance benchmarking
npm run benchmark

# Code quality checks
npm run lint
npm run validate

# Development mode
npm run dev

Architecture Insights

Core Technical Discoveries

h2A Async Message Queue System - Real-time steering mechanism with dual-buffer architecture
Multi-layered Agent Architecture - Main agent loop (nO), sub-agents (I2A), and task-specific agents
Intelligent Context Management - 92% threshold auto-compression with wU2 compressor
6-Layer Security Framework - From UI validation to execution sandboxing

Read the full file on GitHub · 120 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.

2mo ago First seen · 120 lines · 961 tokens per session scan A ff35f0b7a525

Subscribe to this mod's changes

analysis_claude_code CLAUDE.md is an instructions file published in the GitHub repository ThreeFish-AI/analysis_claude_code (316 stars, last pushed 1y ago), licensed Apache-2.0. It adds 961 tokens to every session, about $0.0038 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.

Research

analysis_claude_code CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
analysis_claude_code CLAUDE.mdThreeFish-AI/analysis_claude_code	Instructions file	316	1y ago	Apache-2.0	A	961	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

analysis_claude_code: Instructions file for Claude Code