Agent skill

Adaptive Web Fuzzing

by Encod3d-Sec in Encod3d-Sec/TORCH

Adaptive web fuzzing for pentests, bug bounty and CTF work: picks the smallest suitable SecLists wordlist per target surface and calibrates filters against soft-404 responses.

MITAuto-check passedSecurity

Install Adaptive Web Fuzzing

skills CLI
$ npx skills add Encod3d-Sec/TORCH --skill fuzz -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install Encod3d-Sec/TORCH fuzz --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/Encod3d-Sec/TORCH.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/workflow/fuzz .claude/skills/fuzz && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
fuzz
GitHub stars
329
Used in
1 other repo
Token cost
~1.3k tokens
SKILL.md length
531 words
Files
1
Skills in repo
35
Repo updated
First seen
Licence
MIT

At a glance

Adaptive web fuzzing for pentests, bug bounty and CTF work: picks the smallest suitable SecLists wordlist per target surface and calibrates filters against soft-404 responses.

  • Works in 8 steps: Profile (do this first) → Two axes → Select (deterministic) - always via… → …
  • Running content or vhost discovery against a web target in a security engagement
  • SKILL.md covers 0. Profile (do this first), 1. Two axes, 2. Select (deterministic) -… and 3. Calibrate (native first,…, plus 5 more sections
  • Calls bash and python3

What it does

The skill reads the engagement type from the active target's state.md and sets a profile. The ctf profile runs loud and fast, pt uses a calibrated rate and obeys rules-of-engagement flags such as no_bruteforce and no_dos by skipping the brute-force tiers, and bb runs at a low rate with jitter while watching for a ban. Work then proceeds on two axes: widening across content, files, vhosts, APIs and artifacts, and deepening into hidden parameters once an endpoint is observed to accept input.

Wordlists are chosen by a script, wl-pick.sh, which prints the SecLists base, the profile flags and ordered list paths from smallest to largest. The agent is told never to pick a list from memory or to start with the 220k directory-list-2.3-medium list. Filters are calibrated with ffuf -ac and feroxbuster auto-filtering, falling back to probing random bogus paths when a wildcard soft-404 fools them. The agent then climbs from the harness list to SecLists, then cewl-generated words, then product-specific lists as fingerprints appear, and backs off when it detects a WAF or throttling.

When your agent uses it

  • Running content or vhost discovery against a web target in a security engagement
  • Looking for hidden parameters on an endpoint that accepts input
  • Choosing which wordlist to run next for a given surface

Example prompts

  • “Run content discovery on the staging site, respecting the rules of engagement.”
  • “Pick a wordlist for vhost fuzzing on this target and explain the choice.”
  • “That endpoint takes a search input, so fuzz it for hidden parameters.”

Requirements

  • ffuf, gobuster, feroxbuster, cewl or arjun
  • SecLists wordlists
  • The wl-pick.sh script and a target state.md file

Workflow steps

8 steps, taken from the step headings in SKILL.md.

  1. Profile (do this first)
  2. Two axes
  3. Select (deterministic) - always via wl-pick.sh
  4. Calibrate (native first, backstop with judgment)
  5. Climb tiers on SIGNAL (the adaptive core)
  6. Pivot to the parameter axis
  7. WAF / throttle / Cloudflare
  8. 403 is not a dead end

What it can do on your machine

Read from SKILL.md and the folder at commit d21b6c9. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • bash
    • python3

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Adaptive Web Fuzzing loads about 1.3k tokens when it runs. Until then it costs about 165 tokens; SKILL.md has 531 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~165
When it runs · the whole SKILL.md, loaded when a task matches
~1.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Encod3d-Sec/TORCH at commit d21b6c9, republished under its MIT licence (© Encod3d-Sec). 531 words, ~1,264 tokens.

Download SKILL.mdSave it as .claude/skills/fuzz/SKILL.md (or your agent's skills folder).
name
fuzz
description
Adaptive, targeted web fuzzing - deterministic wordlist selection (wl-pick.sh) plus judgment. Picks the right SecLists list per surface (content/vhost/api/params/artifacts) smallest-first, calibrates filters against soft-404s, recurses, escalates T0 harness -> T1 seclists -> T2 cewl -> T3 app-specific on signal, pivots to hidden-param fuzzing, and detects/handles WAF/Cloudflare/throttle (backoff, origin-bypass, or hard STOP on the DoS tell). Engagement-type aware (ctf loud, pt calibrated, bb stealth). Use for "fuzz", "content discovery", "directory brute", "vhost fuzz", "find hidden params", "which wordlist", "gobuster/ffuf/feroxbuster/cewl/arjun".

fuzz - adaptive web fuzzing

0. Profile (do this first)

Read engagement_type from the active targets/<eng>/state.md frontmatter and set the profile:

  • ctf - loud/fast, ignore WAF, recurse deep, exhaust the big list.
  • pt - calibrated rate, obey RoE flags (no_bruteforce/no_dos -> SKIP the brute tiers entirely).
  • bb - stealth: low rate + jitter, watch for the ban BEFORE it lands, request-budget aware. wl-pick.sh emits the profile flags; you apply them.

1. Two axes

  • Surface (widen): content, files, vhost, api, artifacts. Recursive by default.
  • Parameter (deepen): once an endpoint takes input, fuzz hidden params. Triggered by OBSERVING a param-accepting endpoint, never blind.

2. Select (deterministic) - always via wl-pick.sh

bash
# what to run for a surface, given the engagement type and any fingerprint:
bash scripts/wl-pick.sh content "" ctf          # generic content discovery
bash scripts/wl-pick.sh content wordpress bb    # WordPress-aware, BB-stealth
bash scripts/wl-pick.sh vhost "" pt
bash scripts/wl-pick.sh params "" bb

It prints the seclists base, the profile flags line, and the ordered absolute paths (T0 harness -> T3 fingerprint list -> T1 surface lists, size-ordered). NEVER hand-pick a list from memory and NEVER start with directory-list-2.3-medium (220k). The size order is already correct in the output; run top-to-bottom, stop climbing when you have enough signal.

3. Calibrate (native first, backstop with judgment)

  • Default to ffuf -ac/-acc and feroxbuster auto-filtering.
  • If a wildcard/soft-404 fools -ac (everything returns 200 with varying size): fire 2-3 known-bogus random paths first, read status/size/words, then set explicit -fs/-fw on the catch-all baseline, or -mc 200,301,302,401,403 on a clean 404.
  • READ tool output END-TO-END, never a grep. A real hit hides in the noise.

4. Climb tiers on SIGNAL (the adaptive core)

Climb T0 -> T1 -> T2 -> T3 when the current tier is exhausted OR a fingerprint unlocks a better list:

  • T2 cewl when T0/T1 run dry: cewl -d 3 -m 5 --lowercase -w targets/<eng>/custom-words.txt https://TARGET then feed that list back through the same axis. See [[cewl]].
  • T3 app-specific the moment you fingerprint a known product: re-run wl-pick.sh <surface> <product> <type> to jump straight to its shipped list. For a product with no shipped list, Skill(wiki-arsenal) for its known paths, then cewl its docs / probe robots.txt sitemap.xml swagger.json openapi.json.
Show full SKILL.md (221 more words)Show less

5. Pivot to the parameter axis

When a discovered endpoint takes input, fuzz hidden params: arjun -u https://TARGET/endpoint (see [[arjun]]) or ffuf with bash scripts/wl-pick.sh params. Discovered params feed the hunt-* skills (SSRF/LFI/IDOR/cmdi).

6. WAF / throttle / Cloudflare

Detect: wafw00f/whatwaf up front; headers cf-ray/server: cloudflare/x-sucuri/x-datadome/incapsula; mid-run 429+Retry-After, climbing latency, 000/timeouts, a wall of uniform 403. Respond, in order:

  1. WAF fingerprinted up front -> stealth posture regardless of profile, and PREFER BYPASS over throttle: find the origin IP (cert SANs, historical DNS) and fuzz origin directly - see [[cdn-waf-bypass]].
  2. Throttle mid-run -> auto-backoff: halve rate, add -p 0.1-2.0 jitter, drop one size-tier.
  3. Ban / DoS tell (sustained all-timeout after a burst) -> HARD STOP, do not grind: python3 scripts/campaign.py pause-host <host> and call Skill(redteamlead) for a re-vector rather than tuning the tooling.
  4. RoE no_bruteforce/no_dos -> skip the brute tiers; scope-guard also enforces this at the Bash layer.

7. 403 is not a dead end

A 403 on a discovered dir is a signal, not an end. Try bypass BEFORE abandoning: path mutations (/admin/, /admin/., /admin/..;/, /%2e/admin, case, trailing ?), method swap (GET->POST/HEAD/TRACE), and header spoofs (X-Forwarded-For: 127.0.0.1, X-Original-URL, X-Rewrite-URL). Use a dedicated tool (byp4xx/nomore403) rather than a wordlist - 403 bypass is mutation, not brute. See [[cdn-waf-bypass]].

Wiki

Tools: [[ffuf]] [[wiki/tools/feroxbuster]] [[cewl]] [[arjun]]. Reference: [[wordlists]] (the selection matrix, human-readable twin of wordlist-map.json), [[cdn-waf-bypass]] (WAF/origin bypass). Stuck -> Skill(redteamlead).

© Encod3d-Sec, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/workflow/fuzz of Encod3d-Sec/TORCH.

Open the folder on GitHubat commit d21b6c9

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in Encod3d-Sec/TORCH, which our catalogue first saw on October 7, 2026.

Compare with similar skills

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Categories

Questions about Adaptive Web Fuzzing

What does Adaptive Web Fuzzing do?

Adaptive web fuzzing for pentests, bug bounty and CTF work: picks the smallest suitable SecLists wordlist per target surface and calibrates filters against soft-404 responses. md and sets a profile. The ctf profile runs loud and fast, pt uses a calibrated rate and obeys rules-of-engagement flags such as no_bruteforce and no_dos by skipping the brute-force tiers, and bb runs at a low rate with jitter while watching for a ban.

When should I use Adaptive Web Fuzzing?

Adaptive Web Fuzzing fits situations like: running content or vhost discovery against a web target in a security engagement; looking for hidden parameters on an endpoint that accepts input; choosing which wordlist to run next for a given surface.

How do I install Adaptive Web Fuzzing in Claude Code?

Run `npx skills add Encod3d-Sec/TORCH --skill fuzz -a claude-code`. Or copy the skill folder (skills/workflow/fuzz in Encod3d-Sec/TORCH) into .claude/skills/fuzz in your project. Claude Code loads it when a task matches its description.

How do I install Adaptive Web Fuzzing in Codex?

Run `npx skills add Encod3d-Sec/TORCH --skill fuzz -a codex`. Or copy the skill folder (skills/workflow/fuzz in Encod3d-Sec/TORCH) into .agents/skills/fuzz in your project. Codex loads it when a task matches its description.

Can I use Adaptive Web Fuzzing in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Encod3d-Sec/TORCH --skill fuzz -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/fuzz, .gemini/skills/fuzz, .github/skills/fuzz and .opencode/skills/fuzz in your project.

What does Adaptive Web Fuzzing need to run?

Going by SKILL.md and its folder, Adaptive Web Fuzzing needs the command-line tools its instructions call (bash and python3). Our summary lists: ffuf, gobuster, feroxbuster, cewl or arjun; SecLists wordlists; The wl-pick.sh script and a target state.md file.

Does Adaptive Web Fuzzing access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Adaptive Web Fuzzing safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Adaptive Web Fuzzing use?

Adaptive Web Fuzzing is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Adaptive Web Fuzzing use?

About 1.3k tokens (SKILL.md is roughly 5.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Adaptive Web Fuzzing?

Skills that share tags, products or a category with Adaptive Web Fuzzing: Metabigor OSINT Recon (j3ssie/metabigor, 1.8k stars), Wooyun Legacy (tanweai/wooyun-legacy, 1.8k stars), Client Request Signature Reversal (awarexone/Agentic-Bug-Hunter, 5.3k stars) and Web3 Bug Bounty AI Tools (tradecatlabs/vibe-coding-cn, 17k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Adaptive Web Fuzzing?

Encod3d-Sec (a GitHub user) maintains it in Encod3d-Sec/TORCH, which has 329 GitHub stars. The repository holds 35 skills in this directory. The repository was last updated on September 1, 2026.

Source: Encod3d-Sec/TORCH on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.