ontology-explorer agent skill by HeshamFS

At a glance

Before you install

Read from the skill's files at the directory's October 19, 2026 snapshot: what ships with it, what its code reads, and the terms it is published under.

• Bundled scripts: 4 script files (4 Python). Your agent may run them, so read them first.
• Network: its scripts use an HTTP client or a cloud SDK, and name purl.obolibrary.org.
• Tool permissions requested: Read, Bash (the allowed-tools field of SKILL.md).
• License: Apache-2.0, an open-source or open-content license.

Install ontology-explorer

The skills CLI works with Claude Code, Codex, Cursor and other agents; the other routes copy the folder by hand.

npx skills add https://github.com/HeshamFS/materials-simulation-skills/tree/main/skills/ontology/ontology-explorer

tmp="$(mktemp -d)"
git clone --depth 1 https://github.com/HeshamFS/materials-simulation-skills.git "$tmp/repo"
mkdir -p .claude/skills
cp -R "$tmp/repo/"skills/ontology/ontology-explorer .claude/skills/
rm -rf "$tmp"

python3 ~/.codex/skills/.system/skill-installer/scripts/install-skill-from-github.py \
    --repo HeshamFS/materials-simulation-skills \
    --path skills/ontology/ontology-explorer

HeshamFS/materials-simulation-skills is third-party code. Read SKILL.md and any bundled scripts before you install it.

How the author describes it

Parse, navigate, and query materials science ontology structures — browse class hierarchies, inspect individual classes and their properties, look up object and data property definitions with domain/range, search for ontology terms by keyword, and parse or summarize raw OWL/XML files. Currently supports CMSO and ASMO; the broader OCDO ecosystem (CDCO, PODO, PLDO, LDO) is planned. Use when exploring what classes or properties an ontology provides, finding the right CMSO term for a crystal structure or simulation concept, understanding parent-child class relationships, or onboarding to an unfamiliar materials ontology, even if the user only says "what ontology terms describe my FCC copper simulation" or "show me the CMSO class hierarchy."

From the description field of SKILL.md. Agents read this line to decide when to load the skill.

Sections in SKILL.md

• Goal
• Requirements
• Inputs to Gather
• Decision Guidance
• Script Outputs (JSON Fields)
• Workflow
• Conversational Workflow Example
• CLI Examples
• Error Handling
• Interpretation Guidance
• Verification checklist
• Common pitfalls & rationalizations
• Security
• Input Validation
• File Access
• Tool Restrictions

Files in the skill folder

• CHANGELOG.md
• SKILL.md
• evals/evals.json
• evals/files/mini_ontology.owl
• references/asmo_guide.md
• references/asmo_summary.json
• references/cmso_guide.md
• references/cmso_summary.json
• references/ontology_registry.json
• references/owl_primer.md
• scripts/class_browser.py
• scripts/ontology_summarizer.py
• scripts/owl_parser.py
• scripts/property_lookup.py

Suede Skill Check: 82/100 · B

ontology-explorer passes the required frontmatter check and all seven graded checks, which cover the SKILL.md format, a declared license and a commit in the last year. Those checks earn 56 of the score’s points; the rest come from description quality, instruction depth, bundled files, maintenance and curated-list citations. How the score works.

Where this skill is cited

HeshamFS/materials-simulation-skills appears in 2 curated lists: BehiSecc/awesome-claude-skills, VoltAgent/awesome-agent-skills.

More science and research skills

All science and research skills

More from HeshamFS/materials-simulation-skills

All 24 skills in HeshamFS/materials-simulation-skills