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 sysml-validationgit 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/sysml-validation)<a href="https://agentmods.dev/skills/mycelium-cmbse/mycelium-hypha/sysml-validation"><img src="https://agentmods.dev/badge/skills/mycelium-cmbse/mycelium-hypha/sysml-validation.svg" alt="Measured on agentmods" 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 | $0.00071 | $0.01546 |
| Opus 5 | $0.00036 | $0.00773 |
| Sonnet 5 | $0.00014 | $0.00309 |
| Haiku 4.5 | $0.00007 | $0.00155 |
Grade A, and why
sysml-validation 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 8d 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 — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SysML v2 validation
Check SysML v2 / KerML textual notation against the documented grammar and metamodel, then report findings with locations and corrections.
Releases
The metamodel and grammar are generated per upstream release tag (YYYY-MM). Read
knowledge/versions.json for the installed tags and the default one, then substitute it for
<tag> below. Validate against the default release unless the user names another, and say which
release you validated against — a construct valid in one release may not be in another.
Knowledge base
knowledge/<tag>/textual-notation/index.md– the keyword reference, read from that release's own grammar. Start here for what is and is not a keyword.knowledge/<tag>/textual-notation/examples/– every model shipped with that release, copied verbatim, each linked to the metamodel elements it declares. These are the reference for what valid notation looks like: if a construct appears here, it is valid for this release.knowledge/<tag>/metamodel/– the combined KerML + SysML v2 metamodel:elements/<Metaclass>.mdfor structural constraints,index.json(orindex.md) for fast name → element lookup, andmetamodel.jsonfor the structural checks below.knowledge/<tag>/cross-references.json– element → clause identifiers, BNF production and worked example. Committed, so it works without the PDFs.knowledge/<tag>/spec/– normative clauses to cite. Git-ignored / generated locally (seetools/spec-extract); if it is empty, cite the metamodel/grammar and name the governing clause fromcross-references.jsonrather than inventing one.
What to check
Syntax (against the grammar reference)
- Every declaration is terminated by
;or has a{ }body; braces/brackets/parentheses balance. - Names are not reserved keywords unless quoted (
'name'); keywords are spelled and placed per the reference. - Relationship operators are correct:
:(typing / defined by),:>(specializes / subsets),:>>(redefines),::>(references),=>(crosses).=binds a value, not a type. - Multiplicity is well-formed (
[lower..upper],[n],[*]).
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.
- 8d ago First seen · 115 lines · 71 tokens per session scan A fb858e5d8ff7
sysml-validation is a skill published in the GitHub repository mycelium-cmbse/mycelium-hypha (11 stars, last pushed yesterday), licensed Apache-2.0. It adds 71 tokens to every session and 1,546 once invoked, about $0.0004 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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