Decepticon is an autonomous red-team agent that coordinates AI agents, security tools, sandboxes, and supporting services for authorized cybersecurity assessments. Security researchers and red teams can run it through its Docker stack, cloud service, command-line interface, or Python SDK, with the catalogue entries representing its available skills.
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 PurpleAILAB/Decepticon --skill hppgit clone --depth 1 https://github.com/PurpleAILAB/DecepticonWrote 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/purpleailab/decepticon/hpp)<a href="https://agentmods.dev/skills/purpleailab/decepticon/hpp"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/hpp.svg" alt="Measured on agentmods" 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 | $0.00025 | $0.02443 |
| Opus 5 | $0.00013 | $0.01222 |
| Sonnet 5 | $0.00005 | $0.00489 |
| Haiku 4.5 | $0.00003 | $0.00244 |
Grade A, and why
hpp scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
| Python `urllib.parse.parse_qs` | **list** (`["1","2"]`) | — | How it starts
The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.
HTTP Parameter Pollution (HPP)
Two layers (proxy/WAF, framework, app code) parse the same duplicate parameter differently. The WAF inspects one value, the app reads another — payload slips through. Or the framework picks one value for the auth check and a different one for the action — ACL bypass. Standalone severity is usually Low/Medium; chained into SQLi / SSRF / auth bypass it is High/Critical.
1. Parser precedence table
When ?id=1&id=2 (or duplicated body params) is received:
| Stack | request.GET['id'] / equivalent |
getParameterValues / list view |
|---|---|---|
PHP ($_GET) |
last wins (2) |
$_GET['id[]'] only; otherwise the dup is dropped |
ASP.NET (Request.QueryString["id"]) |
comma-concatenated ("1,2") |
GetValues returns both |
| ASP Classic | comma-concatenated | — |
Java Servlet (getParameter) |
first (1) |
getParameterValues returns both |
Java Spring @RequestParam String |
first | List<String> binds both |
Node.js qs (Express default) |
array (["1","2"]) |
n/a |
Node.js querystring (legacy) |
array | n/a |
Python Flask request.args.get |
first | getlist returns both |
Python Django request.GET['id'] |
last | getlist returns both |
Python urllib.parse.parse_qs |
list (["1","2"]) |
— |
| Ruby on Rails | last | params[:id] is the last; arrays via id[]= |
Go net/http r.URL.Query().Get |
first | ["id"] returns all |
Perl CGI param("id") |
first in scalar, list in list context | — |
nginx $arg_id |
first | — |
Apache mod_rewrite %{QUERY_STRING} |
raw — passes both | — |
| AWS API Gateway → Lambda proxy | last in queryStringParameters, all in multiValueQueryStringParameters |
— |
| Cloudflare WAF | inspects all values for rule match (generally) | — |
| AWS WAF | inspects each occurrence | — |
| ModSecurity (CRS) | inspects each — but anomaly score per rule | — |
The exploitable pattern: WAF/proxy reads value A, app reads value B.
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.
- 3d ago First seen · 190 lines · 25 tokens per session scan A 8d686a182aa1
hpp is a skill published in the GitHub repository PurpleAILAB/Decepticon (5,451 stars, last pushed 7d ago), licensed Apache-2.0. It adds 25 tokens to every session and 2,443 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
api-crud-generator
A code generator that creates standard Next.js API routes and an administration page from Prisma models. Prisma is a tool that describes and accesses an application’s database.
msbuild-antipatterns
Catalog of MSBuild anti-patterns with detection rules and fix recipes. Only activate in MSBuild/.NET build context. USE FOR: reviewing, auditing, or cleaning up .csproj, .vbproj, .fsproj, .props, .targets, or .proj files. Each anti-pattern has a symptom, explanation, and concrete BAD→GOOD transformation. Covers…
run-tests
Runs .NET tests with dotnet test. Use when user says "run tests", "run my tests", "run these tests", "execute tests", "dotnet test", "test filter", "filter by category", "filter by class", "combine filters", "run only specific tests", "integration tests", "unit tests", "tests not running", "hang timeout"…
fastapi
FastAPI best practices and conventions. Use when working with FastAPI APIs and Pydantic models for them. Keeps FastAPI code clean and up to date with the latest features and patterns, updated with new versions. Write new code or refactor and update old code.
dotnet-10-csharp-14
Use when building .NET 10 or C# 14 applications; when using minimal APIs, modular monolith patterns, or feature folders; when implementing HTTP resilience, Options pattern, Channels, or validation; when seeing outdated patterns like old extension method syntax.
nodejs-core
Debugs native module crashes, optimizes V8 performance, configures node-gyp builds, writes N-API/node-addon-api bindings, and diagnoses libuv event loop issues in Node.js. Use when working with C++ addons, native modules, binding.gyp, node-gyp errors, segfaults, memory leaks in native code, V8…