js-reverse

js-reverse is a skill for Claude Code, Codex from DamonZS/PE-reverse-skill. It costs 84 tokens per session (2,367 once invoked), scanned A, original, no licence file.

A workflow for examining front-end JavaScript to understand how pages create signatures and other runtime values.

In plain words
What is it for?
It is for locating signing logic, observing pages, sampling runtime behavior, and recreating missing browser environments.
Why use it?
It helps you trace obfuscated browser code and reproduce its behavior locally with recorded evidence.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit It is for locating signing logic, observing pages, sampling runtime behavior, and recreating missing browser environments.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/damonzs/pe-reverse-skill/js-reverse
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 DamonZS/PE-reverse-skill --skill js-reverse
Clone the repo
git clone --depth 1 https://github.com/DamonZS/PE-reverse-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

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/damonzs/pe-reverse-skill/js-reverse"><img src="https://agentmods.dev/badge/skills/damonzs/pe-reverse-skill/js-reverse.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,367 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 unknown 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 $0.00084 $0.02367
Opus 5 $0.00042 $0.01184
Sonnet 5 $0.00017 $0.00473
Haiku 4.5 $0.00008 $0.00237

Measured 6d ago against content hash db4944e2ddde, 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 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 6d 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.

reverse-skills/skills/js-reverse/SKILL.md · 213 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 6d ago First seen · 213 lines · 84 tokens per session scan A db4944e2ddde

Subscribe to this mod's changes

js-reverse is a skill published in the GitHub repository DamonZS/PE-reverse-skill (20 stars, last pushed 12d ago), with no licence file. It adds 84 tokens to every session and 2,367 once invoked, about $0.0004 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 2026-09-03.

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