reverse-engineering-binaries-with-radare2-rizin

reverse-engineering-binaries-with-radare2-rizin is a skill for Claude Code, Codex from meltedinhex/analyst-ai-pack. It costs 78 tokens per session (700 once invoked), scanned A, original, Apache-2.0.

A guide to examining compiled programs with radare2 or rizin, terminal-based tools that show machine instructions, functions, and control-flow graphs.

In plain words
What is it for?
Use it to analyse functions, navigate disassembly, inspect references, add names and comments, define data, and patch instructions when needed.
Why use it?
It gives a repeatable way to understand a binary without relying on a graphical interface. It also covers safe static analysis and optional code patching.

Skill for Claude CodeCodex

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

Good fit Use it to analyse functions, navigate disassembly, inspect references, add names and comments, define data, and patch instructions when needed.

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Install with agentmods
npx agentmods add skills/meltedinhex/analyst-ai-pack/reverse-engineering-binaries-with-radare2-rizin
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 meltedinhex/analyst-ai-pack --skill reverse-engineering-binaries-with-radare2-rizin
Clone the repo
git clone --depth 1 https://github.com/meltedinhex/analyst-ai-pack

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 reverse-engineering-binaries-with-radare2-rizin

README.md
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Your own site
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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.

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Your own site · 80×15
<a href="https://agentmods.dev/skills/meltedinhex/analyst-ai-pack/reverse-engineering-binaries-with-radare2-rizin"><img src="https://agentmods.dev/badge/skills/meltedinhex/analyst-ai-pack/reverse-engineering-binaries-with-radare2-rizin.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 78 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 700 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 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 $0.00078 $0.00700
Opus 5 $0.00039 $0.00350
Sonnet 5 $0.00016 $0.00140
Haiku 4.5 $0.00008 $0.00070

Measured 8d ago against content hash dda33f10279e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

reverse-engineering-binaries-with-radare2-rizin 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 8d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/analyst.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.

skills/reverse-engineering-binaries-with-radare2-rizin/SKILL.md · 89 lines

What it actually says

Reverse Engineering Binaries With radare2/rizin

When to Use

  • You want to statically reverse a binary with the radare2/rizin command set: analyze, navigate functions, read disassembly/graphs, and patch.
  • You prefer a scriptable, terminal-based RE workflow.

Do not use r2's debug mode (-d) to run untrusted samples on your host — for static RE, open without debugging. Work in an isolated environment.

Prerequisites

  • radare2 or rizin installed and the sample (read inertly).

Safety & Handling

  • Static analysis does not execute the sample; keep the working directory isolated.

Workflow

Step 1: Open and analyze

python scripts/analyst.py cheatsheet analyze

Prints the core sequence: open read-only (r2 -e bin.cache=true sample), aaa to analyze, afl to list functions, iI/ie for info/entrypoint.

Step 2: Navigate and disassemble

Use s <addr>/s main to seek, pdf to print a function, VV for the graph view, and axt for cross-references.

Step 3: Annotate

Rename with afn, add comments with CC, define data with Cd, and flag locations with f.

Step 4: Patch (optional)

In write mode (-w), use wa/wx to assemble/patch and re-verify with pdf.

Validation

  • aaa completes and afl lists functions before deeper navigation.
  • Commands used are real r2/rizin commands (verifiable in the book).
  • Patches are re-disassembled to confirm the intended change.

Pitfalls

  • Forgetting aaa, leaving functions undefined.
  • Confusing radare2 and rizin command differences in scripts.
  • Opening with -d (debug/run) when only static analysis is intended.

References

Files

What ships with it

3 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. 8d ago First seen · 89 lines · 78 tokens per session scan A dda33f10279e

Subscribe to this mod's changes

reverse-engineering-binaries-with-radare2-rizin is a skill published in the GitHub repository meltedinhex/analyst-ai-pack (22 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 78 tokens to every session and 700 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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