Learn-skills.dev lcamtuf-afl-documentation

Points to Michał Zalewski’s (lcamtuf) canonical American Fuzzy Lop (AFL) documentation at lcamtuf.coredump.cx/afl—coverage-guided fuzzing concepts, afl-fuzz usage, and historical technical notes for C/C++ targets. Use when the user cites AFL classic, lcamtuf’s AFL page, or needs the original upstream reference—not as a substitute for current AFL++ docs or authorized fuzzing policy.

install

source · Clone the upstream repo

git clone https://github.com/NeverSight/learn-skills.dev

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/NeverSight/learn-skills.dev "$T" && mkdir -p ~/.claude/skills && cp -r "$T/data/skills-md/agentic-reserve/blockint-skills/lcamtuf-afl-documentation" ~/.claude/skills/neversight-learn-skills-dev-lcamtuf-afl-documentation && rm -rf "$T"

manifest: data/skills-md/agentic-reserve/blockint-skills/lcamtuf-afl-documentation/SKILL.md

source content

lcamtuf — American Fuzzy Lop (AFL) documentation (reference)

Educational routing only. This skill does not mirror the full site. Open the live pages for complete instructions, file lists, and any upstream notes.

Canonical URL

American Fuzzy Lop (AFL) — hosted on lcamtuf.coredump.cx (Michał Zalewski’s site).

What it is

AFL is a coverage-guided fuzzer aimed primarily at C/C++ binaries via compile-time instrumentation (e.g.

afl-gcc

afl-clang

/ LLVM modes) and the afl-fuzz
driver. The published material on this site includes the original project narrative, quick-start style guidance, status screen semantics, and performance / tuning notes that many tutorials still cite.

Typical mental model for readers:

Topic	Role
Instrumentation	Rebuild the target with AFL’s compilers/wrappers so edges are tracked.
Corpus & seeds	Start from small valid inputs; AFL mutates and discovers new paths.
Fuzzing loop	`afl-fuzz` runs; UI shows paths, crashes, hangs, stability—interpret per upstream docs.
Crashes	Triaged as potential bugs; verify, minimize, report responsibly.

Modern fork (operational note)

Active development of the AFL lineage for many teams is AFL++ (feature-rich fork, maintained tooling). Use this skill when the user explicitly wants lcamtuf’s classic page or historical AFL terminology; use AFL++ docs for current flags, compilers, and CI integration on new projects.

How to combine with blockint

Need	Skill
Solidity / EVM smart contract review	evm-solidity-defi-triage-agent, defi-security-audit-agent
Solana / Rust program security	solana-defi-vulnerability-analyst-agent, sealevel-attacks-solana
C/C++ native code in security research	lcamtuf-afl-documentation (AFL concepts) + project-specific build docs

Guardrails

Scope — Fuzz only systems you own or are explicitly authorized to test; follow program rules and laws.
Triaging — Not every crash is exploitable; confirm with debugging and vendor disclosure practice.
Stale tooling — Compare classic AFL behavior with current compiler and AFL++ release notes before production pipelines.

Goal: a stable pointer to lcamtuf.coredump.cx/afl for classic AFL documentation and terminology in security / fuzzing conversations.