sp.reverse-engineer

sp.reverse-engineer is a command for Claude Code from mjunaidca/mjs-agent-skills. It costs 20 tokens per session (12,179 once invoked), scanned A, original, no licence file.

A command that examines an existing codebase and creates documents describing its specifications, implementation plan, tasks, and gathered information.

In plain words
What is it for?
Use it to document an existing project and prepare structured artifacts for future development.
Why use it?
It helps make an unfamiliar codebase understandable in a structured format.

Command for Claude Code

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 commands/mjunaidca/mjs-agent-skills/sp.reverse-engineer
Clone the repo
git clone --depth 1 https://github.com/mjunaidca/mjs-agent-skills

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.

agentmods badge for sp.reverse-engineer

README.md
[![agentmods](https://agentmods.dev/badge/commands/mjunaidca/mjs-agent-skills/sp.reverse-engineer.svg)](https://agentmods.dev/commands/mjunaidca/mjs-agent-skills/sp.reverse-engineer)
Your own site
<a href="https://agentmods.dev/commands/mjunaidca/mjs-agent-skills/sp.reverse-engineer"><img src="https://agentmods.dev/badge/commands/mjunaidca/mjs-agent-skills/sp.reverse-engineer.svg" alt="Measured on agentmods" height="20"></a>
Per session 20 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 12,179 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00020 $0.12179
Opus 5 $0.00010 $0.06090
Sonnet 5 $0.00004 $0.02436
Haiku 4.5 $0.00002 $0.01218

Measured 4d ago against content hash cb3985b31172, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

sp.reverse-engineer scanned grade A with 1 finding 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 4d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

grep -r "http.get\|requests.post\|fetch\|axios\|http.Client" [codebase-path] --include="*.py" --include="*.ts" --include="*.go" | head -20
.claude/commands/sp.reverse-engineer.md · 1,613 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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. 4d ago First seen · 1,613 lines · 20 tokens per session scan A cb3985b31172

Subscribe to this mod's changes

sp.reverse-engineer is a command published in the GitHub repository mjunaidca/mjs-agent-skills (27 stars, last pushed 22d ago), with no licence file. It adds 20 tokens to every session and 12,179 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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