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 alivirgo/Major-AI-Skills --skill horosgit clone --depth 1 https://github.com/alivirgo/Major-AI-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/alivirgo/major-ai-skills/horos)<a href="https://agentmods.dev/skills/alivirgo/major-ai-skills/horos"><img src="https://agentmods.dev/badge/skills/alivirgo/major-ai-skills/horos/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/alivirgo/major-ai-skills/horos"><img src="https://agentmods.dev/badge/skills/alivirgo/major-ai-skills/horos.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 | $0.00027 | $0.01966 |
| Opus 5 | $0.00014 | $0.00983 |
| Sonnet 5 | $0.00005 | $0.00393 |
| Haiku 4.5 | $0.00003 | $0.00197 |
Grade A, and why
horos 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 yesterday.
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 — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Horos Open-Source DICOM Viewer AI Skill Guide (Claude)
Overview & Engine Architecture
Horos is a 64-bit open-source medical imaging and DICOM workstation for macOS, derived from the OsiriX foundation. Built with Objective-C and Cocoa, Horos integrates the DCMTK (DICOM ToolKit) networking stack, an embedded SQLite CoreData indexer, multi-planar reconstruction (MPR, MIP, MinIP, 3D Volume Rendering), and an extensible Plugin Architecture (PluginFilter). Horos acts as both a DICOM Storage Service Class Provider (C-STORE SCP Listener) and a Query/Retrieve Client (C-FIND / C-MOVE SCU). Claude operates as a Principal PACS Administrator and Medical Informatics Engineer, specializing in DICOM communication pipelines, Horos database index recovery, automated batch ingestion (pynetdicom), and XML-RPC / URL scheme integration.
Horos PACS & Visualization Architecture
┌─────────────────────────────────────────────────────────────┐
│ Horos System Architecture │
│ │
│ Presentation & Multi-Planar Visualization │
│ ├── 2D DICOM Viewport (Window/Level, ROIs, Cine Loop) │
│ ├── 3D Post-Processing (MPR, Maximum Intensity Projection) │
│ └── 3D Surface / Volume Rendering & Endoscopy Navigation │
│ │
│ DICOM Networking & Protocol Layer (DCMTK) │
│ ├── C-STORE SCP Daemon (Background Ingestion Listener:11112│
│ ├── C-FIND & C-MOVE SCU (PACS Query & Retrieve Engine) │
│ └── DICOM TLS 1.3 Secure Transfer Association │
│ │
│ Database & Indexing Core │
│ ├── SQLite CoreData Index (`Horos Data/DATABASE.noindex/`) │
│ └── Objective-C Plugin SDK (`PluginFilter.h`) & XML-RPC IPC│
└─────────────────────────────────────────────────────────────┘
What ships with it
2 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.
- yesterday Changed · -24 tokens per session 61f8968cc458
- 7d ago First seen · 160 lines · 51 tokens per session scan A 0a6f80724f8a
horos is a skill published in the GitHub repository alivirgo/Major-AI-Skills (1 stars, last pushed today), licensed MIT. It adds 27 tokens to every session and 1,966 once invoked, about $0.0001 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 2026-09-05.
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