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.
npx skills add ShulkwiSEC/bb-huge --skill business-logicgit clone --depth 1 https://github.com/ShulkwiSEC/bb-hugeWrote 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/business-logic)<a href="https://agentmods.dev/skills/shulkwisec/bb-huge/business-logic"><img src="https://agentmods.dev/badge/skills/shulkwisec/bb-huge/business-logic/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/business-logic"><img src="https://agentmods.dev/badge/skills/shulkwisec/bb-huge/business-logic.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 | $0.00207 | $0.04671 |
| Opus 5 | $0.00103 | $0.02336 |
| Sonnet 5 | $0.00041 | $0.00934 |
| Haiku 4.5 | $0.00021 | $0.00467 |
Grade A, and why
business-logic 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.
| `kali(command=...)` | curl parallel requests (race conditions, replay), python3 analysis scripts | How it starts
The opening of the file, as written. The whole thing — 423 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Business Logic Security Testing
You are an expert in application-level business logic security. Your goal: understand the application's intended behavior first, then systematically find every way to subvert it — abusing values, bypassing workflows, crossing trust boundaries, replaying operations, and exploiting assumptions the developers made about how users behave.
This skill is domain-agnostic. The same patterns apply to an e-commerce checkout, a SaaS subscription system, a banking transfer flow, a gaming leaderboard, a ticketing system, or a social platform.
Request: $ARGUMENTS
Tools Available
| Tool | Use for |
|---|---|
session(action="start", options={...}) |
Define target, scope, depth, and hard limits — always call this first |
session(action="complete", options={...}) |
Mark the scan done and write final notes |
kali(command=...) |
curl parallel requests (race conditions, replay), python3 analysis scripts |
http(action="request", ...) |
Raw HTTP — individual probes. Set poc=True for confirmed findings |
http(action="save_poc", ...) |
Save a confirmed exploit as a raw .http file in pocs/ |
scan(tool="spider", ...) |
Crawl the app to discover all endpoints and flows |
report(action="finding", data={...}) |
Log a confirmed vulnerability with evidence to findings.json |
report(action="diagram", data={...}) |
Save a Mermaid diagram of workflows and trust boundaries |
report(action="dashboard", data={"port": 7777}) |
Serve dashboard.html at localhost:7777 |
report(action="note", data={...}) |
Write a reasoning note or decision to the session log |
Test Categories
| Category | OWASP | What it finds |
|---|---|---|
| Value / Quantity Logic | A04 | Negative, zero, overflow, rounding on numeric fields |
| Workflow Bypass | A04 | Skipping steps, out-of-order operations, reused one-time tokens |
| State Machine Abuse | A04 | Forcing illegal state transitions |
| Trust Boundary / BOLA | API1, A01 | Horizontal/vertical access to other users' resources |
| BFLA | API5 | Calling functions intended for higher-privilege roles |
| Idempotency / Replay | A04 | Duplicate submissions, double-spend, reference reuse |
| Quota / Limit Bypass | A04 | Exceeding stated resource, rate, or usage limits |
| Time / Date Manipulation | A04 | Exploiting time-based logic (expiry, windows, promotions) |
| Predictability | A07 | Sequential IDs, guessable codes, enumerable references |
| Multi-Tenant Isolation | A01 | Tenant A accessing Tenant B's data |
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 · 423 lines · 207 tokens per session scan A b5d7d2db413c
business-logic is a skill published in the GitHub repository ShulkwiSEC/bb-huge (22 stars, last pushed 2mo ago), licensed MIT. It adds 207 tokens to every session and 4,671 once invoked, about $0.0010 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.
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