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 mycelium-cmbse/mycelium-hypha --skill model-library-lookupgit clone --depth 1 https://github.com/mycelium-cmbse/mycelium-hyphaWrote 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/mycelium-cmbse/mycelium-hypha/model-library-lookup)<a href="https://agentmods.dev/skills/mycelium-cmbse/mycelium-hypha/model-library-lookup"><img src="https://agentmods.dev/badge/skills/mycelium-cmbse/mycelium-hypha/model-library-lookup/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/mycelium-cmbse/mycelium-hypha/model-library-lookup"><img src="https://agentmods.dev/badge/skills/mycelium-cmbse/mycelium-hypha/model-library-lookup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00104 | $0.01240 |
| Opus 5 | $0.00052 | $0.00620 |
| Sonnet 5 | $0.00021 | $0.00248 |
| Haiku 4.5 | $0.00010 | $0.00124 |
Grade A, and why
model-library-lookup 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 — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Standard model library lookup
Answer questions about the SysML v2 / KerML standard model libraries – the normative library
packages (ISQBase::mass, ScalarValues::Real, Parts::Part, ...) a user's own model specializes,
not the metamodel that describes what a metaclass is. Be exact and cite the source file.
Releases
The knowledge base is generated per upstream release tag (YYYY-MM, e.g. 2026-05). Read
knowledge/versions.json first: it lists the installed tags newest first and names the default
one to answer from.
jq -r '.default, (.versions[].tag)' knowledge/versions.json
Then substitute that tag for <tag> in every path below.
- Answer from the default release unless the user names one.
- Say which release you answered from. The standard libraries change between releases like everything else in the knowledge base.
- If the user asks about a release that is not installed, say so and list the ones that are.
What this is – and is not
This is the declaration surface: a qualified name, the literal keyword that introduced it (e.g.
attribute def, datatype, part), and where it is declared. It is built by a lightweight scanner
over the verbatim library source, not a real parser.
It does not resolve :>/:>> specialization or redefinition chains, does not know a library
element's supertypes or effective feature set, and cannot tell a public member from a private one.
If asked "what does ISQBase::LengthValue inherit" or "what is mass's full feature set", say
plainly that this index does not compute that – read the page's verbatim source and follow its own
:>/:>> references by hand, or use metamodel-lookup for the metaclass (e.g. AttributeUsage)
the declaration is written as. Do not fabricate a resolved structure to fill the gap.
Knowledge base
knowledge/<tag>/model-library/index.json—declarations, keyed by qualified name (e.g."ISQBase::mass"), each{kind, file, source}:kindis the literal introducing keyword(s),fileis the package page relative tomodel-library/,sourceis the upstream path undersysml.library/.countsgives the number of files and distinct qualified names.knowledge/<tag>/model-library/packages/<slug>.md— one page per standard-library file: front matter (name,language,source,declares,license), the verbatim KerML/SysML source in a fenced block, and a## Declarationslist of every qualified name that page declares.knowledge/<tag>/model-library/index.md— human-readable index, grouped by upstream folder (Domain Libraries,Kernel Libraries,Systems Library).
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 · 88 lines · 104 tokens per session scan A 5ce7ca26bcca
model-library-lookup is a skill published in the GitHub repository mycelium-cmbse/mycelium-hypha (11 stars, last pushed 4d ago), licensed Apache-2.0. It adds 104 tokens to every session and 1,240 once invoked, about $0.0005 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 2026-08-31.
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