Protocol Reverse

CommunityPopular

zhaoxuya520

protocol-reverse

Use for authorized reverse engineering of custom binary protocols, Protobuf/gRPC, WebSocket frames, and PCAP-driven protocol recovery.

Overview

Publisher	zhaoxuya520
Repository	`reverse-skill`
Skill name	`protocol-reverse`
Stars	41K
Forks	5.8K
Bundled files	1
License	MIT
Links	Skill source Repository

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
1 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by zhaoxuya520 on GitHub. Read the source before you install it.

Installation

Install the Protocol Reverse AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/zhaoxuya520/reverse-skill/tree/main/skills/protocol-reverse
Enable the skill in any chat where you want it available.

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/zhaoxuya520/reverse-skill.git /tmp/reverse-skill
mkdir -p .claude/skills
cp -r /tmp/reverse-skill/skills/protocol-reverse .claude/skills/protocol-reverse

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Protocol Reverse in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Protocol Reverse on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Protocol Reverse is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Protocol Reverse Engineering

ACTION REQUIRED（读完后立刻执行）

NOW: 读取 ../field-journal/precedent-reverse.md — 确认授权与常规操作边界
NOW: 确认任务是否为协议/流量/序列化格式逆向（非纯 Web 参数签名 → 转 js-reverse/）
NOW: 若有目标网络交互 → ../scripts/case-init.ps1 完成 scope；auth 未 granted 禁止对目标 ACT
NEXT: 读取 ../tool-index.md；缺工具 bootstrap（tshark/wireshark 等可能需手动）
ACT: 进入工作流 Phase 1，产出帧布局或消息字典草稿

适用场景

自定义 TCP/UDP 二进制协议
Protobuf / gRPC / FlatBuffers / MessagePack
WebSocket / MQTT / 私有 RPC
PCAP / PCAPNG 还原字段与状态机
客户端-服务端校验、序列号、加密帧头

不走本 skill

情况	去哪
仅 HTTP 参数签名 / JS 加密	`js-reverse/`
仅 TLS 证书问题	`pentest-tools/` 或浏览器代理
固件内协议栈深挖 + 仿真	`firmware-pentest/` 后再回本 skill

工作流

Phase 1 — 采集与分诊

text
□ 拿到样本：PCAP / 代理导出 / 客户端日志 / 二进制
□ 标记方向：C→S / S→C；是否有握手、心跳、重连
□ 固定头？魔数？长度字段？TLV？定长？
□ 是否压缩（zlib/gzip/lz4）或加密（AES/ChaCha 帧内）
□ tshark -r cap.pcap -T fields -e frame.number -e ip.src -e tcp.payload

Phase 2 — 帧布局还原

text
□ 对齐多个同类消息，找不变字节 / 自增序列号
□ 长度字段：大端/小端、含头/不含头
□ 校验：CRC16/32、checksum、HMAC 位置
□ 画出状态机：Connect → Auth → Ready → Request/Response → Close
□ 工具：Wireshark 自定义 dissector 草稿 / ImHex / 010 Editor 模板 / Kaitai Struct

Phase 3 — 序列化与加密

text
□ Protobuf：.proto 恢复（blackboxprotobuf / pbtk / protoc --decode_raw）
□ gRPC：HTTP/2 headers + protobuf body
□ 加密：找密钥派生（客户端 so/dll/JS）→ 联合 ida-reverse / js-reverse / apk-reverse
□ 重放：仅在授权 scope 内；先无害字段再敏感操作

Phase 4 — 产物

text
MUST 产出：
- 消息类型表（name / opcode / fields）
- 至少 1 条可复现的解码命令或脚本
- Evidence：原始 hex 摘录 + 解码结果（脱敏）

工具链

工具	必需	用途	自举
tshark / Wireshark	强烈建议	PCAP 解析	手动 / winget
Python3	是	解码脚本	系统
blackboxprotobuf	可选	未知 protobuf	pip
ImHex / 010	可选	结构模板	手动
IDA / r2 / Ghidra	按需	客户端序列化函数	见对应 skill

参考

references/protocol-workflow.md — 帧布局与 Protobuf 速查
相关：../ida-reverse/ ../js-reverse/ ../firmware-pentest/ ../pentest-tools/

路由上下文

上游: MASTER-ROUTING R21 · routing.md
下游: 需客户端算法 → ida-reverse/js-reverse；需利用重放 → pentest-tools/api-security
同级: malware-analysis（C2 协议）、digital-forensics（流量取证）

任务完成自检

是否还原了消息布局或状态机（而非只贴 hex）？
是否有可复现解码命令？
是否遵守 scope / 脱敏？
是否回写 field-journal / 报告 Checklist？

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

references/protocol-workflow.md1 KB

Frequently asked questions

What does the Protocol Reverse AI skill do?

Use for authorized reverse engineering of custom binary protocols, Protobuf/gRPC, WebSocket frames, and PCAP-driven protocol recovery.

Why use Protocol Reverse on TypingMind?

Because you install it once and use it with any model. Protocol Reverse is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Protocol Reverse in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/zhaoxuya520/reverse-skill/tree/main/skills/protocol-reverse. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Protocol Reverse?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Protocol Reverse?

As many as you like. As long as a model supports skills, you can use Protocol Reverse with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Protocol Reverse AI skill free?

Yes. It is published on GitHub by zhaoxuya520 under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

View all

Diagnosing Superpowers

obra

CommunityPopular

Use when a superpowers session went wrong and your human partner wants to know why — repeated work, ignored plans, stumbles, poor results, a skill that didn't fire, "it took too long", "why is it so…

Brainstorming

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

Executing Plans

Use when you have a written implementation plan to execute in a separate session with review checkpoints

Using Superpowers

Use when starting any conversation - establishes how to find and use skills, requiring skill invocation before ANY response including clarifying questions

Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Protocol Reverse Engineering

ACTION REQUIRED（读完后立刻执行）

适用场景

不走本 skill

工作流

Phase 1 — 采集与分诊

Phase 2 — 帧布局还原

Phase 3 — 序列化与加密

Phase 4 — 产物

工具链

参考

路由上下文

任务完成自检

Bundled files

Frequently asked questions

Related AI Skills

Set up your own AI workspace now