Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/ShulkwiSEC/bb-hugenpx agentmods add skills/shulkwisec/bb-huge/essential-skillsWrote 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.
[](https://agentmods.dev/skills/shulkwisec/bb-huge/essential-skills)<a href="https://agentmods.dev/skills/shulkwisec/bb-huge/essential-skills"><img src="https://agentmods.dev/badge/skills/shulkwisec/bb-huge/essential-skills/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.
<a href="https://agentmods.dev/skills/shulkwisec/bb-huge/essential-skills"><img src="https://agentmods.dev/badge/skills/shulkwisec/bb-huge/essential-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00024 | $0.00822 |
| Opus 5 | $0.00012 | $0.00411 |
| Sonnet 5 | $0.00005 | $0.00164 |
| Haiku 4.5 | $0.00002 | $0.00082 |
Grade A, and why
Essential Skills — Deep Dive 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 7d 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.
tools: [burp-suite, curl, sqlmap, ffuf, python] Copies of this mod
1 near-identical copy found in the catalogue:
- Essential Skills — Deep Dive — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Essential Skills — Deep Dive
Deep-Dive Lab Playbook — Every PortSwigger lab variant with exact payloads, bypass techniques, and zero-day extensions. 🟢 Apprentice 🟡 Practitioner 🔴 Expert
When to Use
- BSCP certification prep
- Real-world bug bounty hunting
- Building exploitation chains
Prerequisites
- Burp Suite Professional
- Browser with proxy configured
Workflow
Phase 1: Reconnaissance
- Identify input vectors, parameters, and application behavior.
Phase 2: Exploitation
- Apply standard lab payloads.
Phase 3: Zero-Day Escalation
- Fuzz filters, bypass WAFs, and chain with other vulns.
Lab Playbooks
Lab 1: Discovering vulnerabilities quickly with targeted scanning 🟡 PRACTITIONER
Use Burp Scanner's "Scan defined insertion points" feature on specific parameters rather than running a full crawl-and-scan which takes too long. Send a single request to Intruder or Scanner and only select the specific parameter (e.g., inside an XML node) to scan for vulnerabilities like XXE or SQLi.
Zero-day tip: Targeted scanning minimizes noise and risk of burning accounts compared to full automated scans.
Lab 2: Scanning non-standard data structures 🟡 PRACTITIONER
When dealing with custom or non-standard data (like a bespoke binary format or deep JSON encoding), use Burp extensions like JSON Web Tokens (JWT) or build a custom BApp. If standard insertion points don't work, use the "Bypass WAF" or "Hackvertor" extensions to auto-encode scanner payloads before they leave Burp.
Zero-day tip: Often, applications correctly sanitize standard form-data but fail to apply the same sanitization logic to Base64-encoded or custom-delimited data structures.
Key Concepts
| Concept | Description |
|---|---|
| PortSwigger Vectors | Standardized approaches to vulnerability classes. |
| Payload Encoding | Modifying payloads to bypass basic string matching WAFs. |
Output Format
Vulnerability Deep-Dive Report
==============================
Target Vector: [Endpoint]
Bypass Technique: [Explanation of bypass]
Payload Used: [Payload]
Impact Explanation: [Impact]
What ships with it
1 file 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.
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.
- 7d ago First seen · 86 lines · 24 tokens per session scan A 34476fee70e6
Essential Skills — Deep Dive is a skill published in the GitHub repository ShulkwiSEC/bb-huge (22 stars, last pushed 2mo ago), licensed MIT. It adds 24 tokens to every session and 822 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 2026-09-03.
Other skills, from other repositories
DOM-based Vulnerabilities — Complete Deep Dive
Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.
Essential Skills — Deep Dive
PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.
XXE Injection — Complete Deep Dive
Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.
HTTP Request Smuggling — Complete Deep Dive
Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.
Business Logic Vulnerabilities — Complete Deep Dive
Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.
Server-Side Template Injection — Complete Deep Dive
Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.