Osmedeus is a security-focused orchestration engine that runs complex, auditable workflows defined in YAML. Security practitioners use it to automate reconnaissance, scanning, and related operations across local, containerized, remote, distributed, and cloud environments. The catalogue includes instructions and a skill for working with Osmedeus.
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 j3ssie/osmedeus --skill osmedeus-expertgit clone --depth 1 https://github.com/j3ssie/osmedeusWrote 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/j3ssie/osmedeus/osmedeus-expert)<a href="https://agentmods.dev/skills/j3ssie/osmedeus/osmedeus-expert"><img src="https://agentmods.dev/badge/skills/j3ssie/osmedeus/osmedeus-expert/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/j3ssie/osmedeus/osmedeus-expert"><img src="https://agentmods.dev/badge/skills/j3ssie/osmedeus/osmedeus-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Rogue Agent · line 110 Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
- high YARA Match · line 264 YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
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 | $0.00113 | $0.03043 |
| Opus 5 | $0.00056 | $0.01522 |
| Sonnet 5 | $0.00023 | $0.00609 |
| Haiku 4.5 | $0.00011 | $0.00304 |
Grade A, and why
osmedeus-expert scanned grade A with 0 findings 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 11d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 354 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Osmedeus Expert
Expert knowledge for writing YAML workflows and operating the Osmedeus security automation engine.
Quick Orientation
Osmedeus executes YAML-defined workflows with two kinds:
- module - Single execution unit containing steps (the building block)
- flow - Orchestrates multiple modules with dependency ordering
Template variables use {{Variable}} syntax. Foreach loop variables use [[variable]] to avoid conflicts.
Running Osmedeus
Essential Commands
# Run a flow against a target
osmedeus run -f <flow-name> -t <target>
# Run a module
osmedeus run -m <module-name> -t <target>
# Run multiple modules in sequence
osmedeus run -m mod1 -m mod2 -t <target>
# Multiple targets from file with concurrency
osmedeus run -m <module> -T targets.txt -c 5
# With parameters
osmedeus run -m <module> -t <target> -p threads=20 -p depth=2
osmedeus run -m <module> -t <target> -P params.yaml
# With timeout and repeat
osmedeus run -m <module> -t <target> --timeout 2h
osmedeus run -m <module> -t <target> --repeat --repeat-wait-time 30m
# Dry run (show what would execute)
osmedeus run -m <module> -t <target> --dry-run
# Chunked processing for large target lists
osmedeus run -m <module> -T targets.txt --chunk-size 100 --chunk-part 0
# Distributed execution
osmedeus run -m <module> -t <target> --distributed-run
Workflow Management
osmedeus workflow list # List available workflows
osmedeus workflow show <name> # Show workflow details
osmedeus workflow lint <workflow-path> # Validate workflow YAML
Installation & Setup
osmedeus install base --preset # Install base from preset repo
osmedeus install base --preset --keep-setting # Install base, keep settings
osmedeus install workflow --preset # Install workflows from preset
osmedeus install binary --all # Install all tool binaries
osmedeus install binary --name <name> # Install specific binary
osmedeus install binary --all --check # Check binary status
osmedeus install env # Add binaries to PATH
osmedeus install validate --preset # Validate installation
What ships with it
5 files 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.
- 11d ago First seen · 354 lines · 113 tokens per session scan A e110489f4602
osmedeus-expert is a skill published in the GitHub repository j3ssie/osmedeus (6,556 stars, last pushed 1mo ago), licensed MIT. It adds 113 tokens to every session and 3,043 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
metabigor
Use when operating the metabigor CLI for OSINT recon and infrastructure mapping without API keys. Covers finding network ranges from an ASN, org, domain, or IP (net); enumerating subdomains from certificate logs (cert); enriching IPs with ports/CVEs via Shodan InternetDB (ip); searching public GitHub code for secrets…
Reconnaissance & OSINT Automation
Passive and active reconnaissance, subdomain enumeration, DNS analysis, technology fingerprinting, and OSINT data correlation for authorized security assessments.
osint
Drive extroosint with the right kind, feeds, pivots, and keys.
penetration-testing
Run a scoped pentest with NmapIt, Burp, Metasploit, and a written report.
pwn-ai-agent-curriculum
Drive PWN::AI::Agent::Curriculum from pwneval.
pwn-ai-agent-loop
Drive PWN::AI::Agent::Loop from pwneval.