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 HeshamFS/materials-simulation-skills --skill ontology-explorergit clone --depth 1 https://github.com/HeshamFS/materials-simulation-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/heshamfs/materials-simulation-skills/ontology-explorer)<a href="https://agentmods.dev/skills/heshamfs/materials-simulation-skills/ontology-explorer"><img src="https://agentmods.dev/badge/skills/heshamfs/materials-simulation-skills/ontology-explorer/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/heshamfs/materials-simulation-skills/ontology-explorer"><img src="https://agentmods.dev/badge/skills/heshamfs/materials-simulation-skills/ontology-explorer.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 | $0.00151 | $0.03889 |
| Opus 5 | $0.00076 | $0.01945 |
| Sonnet 5 | $0.00030 | $0.00778 |
| Haiku 4.5 | $0.00015 | $0.00389 |
Grade A, and why
ontology-explorer 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 10d 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 — 261 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Ontology Explorer
Goal
Enable an agent to understand, navigate, and query the structure of materials science ontologies without loading verbose OWL/XML files directly. Provides fast access to class hierarchies, property definitions, and domain-range relationships through pre-processed JSON summaries.
Requirements
- Python 3.10+
- No external dependencies (Python standard library only)
- Internet access required only for
owl_parser.pyandontology_summarizer.pywhen fetching remote OWL files
Inputs to Gather
| Input | Description | Example |
|---|---|---|
| Ontology name | Registered ontology to query | cmso |
| Class name | A specific class to inspect | Material, UnitCell |
| Property name | A specific property to look up | hasMaterial, hasSpaceGroupNumber |
| Search term | Keyword to search across labels | crystal, lattice |
| OWL source | Path or URL to an OWL/XML file (for parsing/summarizing) | https://raw.githubusercontent.com/OCDO/cmso/main/cmso.owl |
Decision Guidance
What do you need?
├── Understand overall ontology structure
│ └── class_browser.py --ontology cmso --list-roots
├── Inspect a specific class
│ └── class_browser.py --ontology cmso --class <name>
├── Find properties for a class
│ └── property_lookup.py --ontology cmso --class <name>
├── Look up a specific property
│ └── property_lookup.py --ontology cmso --property <name>
├── Search for a concept
│ ├── class_browser.py --ontology cmso --search <term>
│ └── property_lookup.py --ontology cmso --search <term>
├── Parse a new/updated OWL file
│ └── owl_parser.py --source <path-or-url>
└── Generate/refresh a summary JSON
└── ontology_summarizer.py --source <url> --output <path>
Script Outputs (JSON Fields)
| Script | Key Outputs |
|---|---|
scripts/owl_parser.py |
results.metadata, results.classes, results.object_properties, results.data_properties, results.class_hierarchy |
scripts/ontology_summarizer.py |
results.output_file, results.statistics |
scripts/class_browser.py |
results.class_info, results.subtree, results.properties, results.path_to_root, results.roots, results.search_results |
scripts/property_lookup.py |
results.property_info, results.class_properties, results.search_results |
What ships with it
13 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.
- CHANGELOG.md 3.6 KB
- evals/evals.json 10 KB
- evals/files/mini_ontology.owl 1.6 KB
- references/asmo_guide.md 7.4 KB
- references/asmo_summary.json 37 KB
- references/cmso_guide.md 6.2 KB
- references/cmso_summary.json 21 KB
- references/ontology_registry.json 908 B
- references/owl_primer.md 3.3 KB
- scripts/class_browser.py 11 KB runs code
- scripts/ontology_summarizer.py 6.8 KB runs code
- scripts/owl_parser.py 11 KB runs code
- scripts/property_lookup.py 13 KB runs code
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.
- 10d ago First seen · 261 lines · 151 tokens per session scan A 54bbe5029e44
ontology-explorer is a skill published in the GitHub repository HeshamFS/materials-simulation-skills (66 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 151 tokens to every session and 3,889 once invoked, about $0.0008 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.
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