js-reverse-automation

js-reverse-automation is a skill for Claude Code, Codex from Fausto-404/js-reverse-automation--skill. It costs 48 tokens per session (394 once invoked), scanned A, original, Apache-2.0.

A workflow for examining JavaScript in a real browser to find where login data, API requests, form fields, or responses are encrypted or signed. It then produces code and connection documentation for using that logic elsewhere.

In plain words
What is it for?
Use it to analyze a target URL, trace password encryption or API signatures, register a callable JavaScript entry point, and generate a Flask proxy or Burp decoder.
Why use it?
It helps when the encryption or request-signing code is hidden inside a website and cannot be identified by reading the page alone. Browser hooks and captured requests provide evidence of the actual code path.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to analyze a target URL, trace password encryption or API signatures, register a callable JavaScript entry point, and generate a Flask proxy or Burp decoder.

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Install with agentmods
npx agentmods add skills/fausto-404/js-reverse-automation--skill/js-reverse-automation
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.

Any agent
npx skills add Fausto-404/js-reverse-automation--skill --skill js-reverse-automation
Clone the repo
git clone --depth 1 https://github.com/Fausto-404/js-reverse-automation--skill

Made for: Claude Code, Codex.

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 js-reverse-automation

README.md
[![agentmods](https://agentmods.dev/badge/skills/fausto-404/js-reverse-automation--skill/js-reverse-automation/github.svg)](https://agentmods.dev/skills/fausto-404/js-reverse-automation--skill/js-reverse-automation)
Your own site
<a href="https://agentmods.dev/skills/fausto-404/js-reverse-automation--skill/js-reverse-automation"><img src="https://agentmods.dev/badge/skills/fausto-404/js-reverse-automation--skill/js-reverse-automation/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 js-reverse-automation

Your own site · 80×15
<a href="https://agentmods.dev/skills/fausto-404/js-reverse-automation--skill/js-reverse-automation"><img src="https://agentmods.dev/badge/skills/fausto-404/js-reverse-automation--skill/js-reverse-automation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 394 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00048 $0.00394
Opus 5 $0.00024 $0.00197
Sonnet 5 $0.00010 $0.00079
Haiku 4.5 $0.00005 $0.00039

Measured 9d ago against content hash 4322d5bf654b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

js-reverse-automation 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 9d ago.

The scan reads SKILL.md. This mod also ships 20 executable files (scripts/ast_candidate_analyzer.js, scripts/build_evidence_graph.py, scripts/check_inputs.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

js-reverse-automation/SKILL.md · 48 lines

What it actually says

JS 逆向自动化

适用场景

  • 登录/注册页面密码加密
  • API 请求签名
  • 表单字段加密
  • 响应数据解密

输入格式

Target URL: https://xxx/login
Parameters To Analyze: password
Optional Fetch Example: fetch("https://xxx/api/login", {...})

核心流程

  1. 预分析 Fetch Example(如果有)→ 提取加密算法、参数格式、目标 URL
  2. 打开页面 → 注入 Hook → 触发目标动作
  3. 捕获网络请求 → 定位加密函数
  4. 注册 JSRPC → 生成 Flask/Burp 产物
  5. 验证输出

详细工作流

详见 workflow/pipeline.md

约束规则

详见 constraints/rules.md

参考资料(按需加载)

  • 反调试:references/antidebug-patterns.md
  • 复杂入口:references/advanced-entrypoints.md
  • 证据收集:references/evidence-collection.md
  • 能力边界:references/capability-boundaries.md
  • 输出契约:references/output-contract.md

Token 预算

  • 单次调用:50,000 token
  • 最大工具调用:20 次
  • 停止条件:找到入口并验证通过 / 所有降级策略失败 / Token 预算耗尽
Files

What ships with it

33 files 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. 9d ago First seen · 48 lines · 48 tokens per session scan A 4322d5bf654b

Subscribe to this mod's changes

js-reverse-automation is a skill published in the GitHub repository Fausto-404/js-reverse-automation--skill (580 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 48 tokens to every session and 394 once invoked, about $0.0002 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.