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 agentmods add skills/skmtc/skmtc/skmtc-modelnpx skills add skmtc/skmtc --skill skmtc-modelgit clone --depth 1 https://github.com/skmtc/skmtcWrote 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/skmtc/skmtc/skmtc-model)<a href="https://agentmods.dev/skills/skmtc/skmtc/skmtc-model"><img src="https://agentmods.dev/badge/skills/skmtc/skmtc/skmtc-model.svg" alt="Measured on agentmods" 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 | $0.00127 | $0.02540 |
| Opus 5 | $0.00063 | $0.01270 |
| Sonnet 5 | $0.00025 | $0.00508 |
| Haiku 4.5 | $0.00013 | $0.00254 |
Grade A, and why
skmtc-model 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 6d 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 — 179 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Model generators: fill the skeleton
A model generator turns each component schema (refName) into one
definition in one file: entry → projection → schema-type router → one
snippet class per schema type. That structure is invariant across
target libraries — only naming policy and per-type syntax vary. So do
not write the structure: copy it.
1. The method
The skeleton/ directory next to this file is a complete, compiling,
engine-tested model generator that renders a placeholder syntax
(m.object({...})). Author by transplant, not from scratch:
- Copy
skeleton/to your package location; rundeno test --allow-env --allow-sys --allow-read— 6 green tests prove the machinery before you touch anything. - Rename:
nameindeno.json;MyLib→YourLibin class names and filenames;myLibEntry→yourLibEntry; thensrc/lib.ts—LIB_MODULE(emitted module specifier) andLIB(imported symbol). - Fill the slots (§2), smallest first: scalars → string/enum → array/object → union → lazy/recursion annotation.
- Re-pin the test: update the pinned strings in
mod.test.tsto your target syntax. The structural assertions (files exist, shared refs dedup to ONE definition, import headers stitched, recursion annotated) must pass UNCHANGED — if one breaks, you broke machinery, not syntax.
Every slot is a // SLOT(name): comment. Everything outside a SLOT is
engine machinery — modifying it is almost always a mistake.
2. The slots
| Slot | File | Decision |
|---|---|---|
library |
src/lib.ts |
emitted module + symbol, single point |
naming, identifier-kind, export-path |
src/base.ts |
identity policy (from refName ONLY) |
string, string-constraints |
src/MyLibString.ts |
string / enum / literal syntax; formats, min/maxLength |
number, integer, boolean, unknown, void |
src/MyLibScalars.ts |
scalar syntax; numeric constraints |
array |
src/MyLibArray.ts |
list syntax |
object-properties, object-intersection, object-empty, visibility |
src/MyLibObject.ts |
object syntax; properties+record composition; readOnly/writeOnly policy |
record |
src/MyLibObject.ts |
additionalProperties map syntax |
union |
src/MyLibUnion.ts |
oneOf/anyOf; discriminated form |
lazy |
src/MyLibRef.ts |
deferred-reference form for cycles |
recursion-annotation |
src/MyLibProjection.ts |
type annotation breaking circular inference |
modifiers |
src/modifiers.ts |
optional/nullable syntax and wrap order |
enrichments |
src/enrichments.ts |
config seam (default: opt-out) |
What ships with it
17 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.
- skeleton/deno.json 613 B
- skeleton/deno.lock 4.7 KB
- skeleton/mod.test.ts 5.6 KB runs code
- skeleton/mod.ts 158 B runs code
- skeleton/src/base.ts 1.1 KB runs code
- skeleton/src/enrichments.ts 405 B runs code
- skeleton/src/lib.ts 388 B runs code
- skeleton/src/mod.ts 430 B runs code
- skeleton/src/modifiers.ts 627 B runs code
- skeleton/src/MyLib.ts 3.6 KB runs code
- skeleton/src/MyLibArray.ts 1.5 KB runs code
- skeleton/src/MyLibObject.ts 5.6 KB runs code
- skeleton/src/MyLibProjection.ts 2.2 KB runs code
- skeleton/src/MyLibRef.ts 3.0 KB runs code
- skeleton/src/MyLibScalars.ts 3.7 KB runs code
- skeleton/src/MyLibString.ts 1.8 KB runs code
- skeleton/src/MyLibUnion.ts 1.9 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.
- 6d ago First seen · 179 lines · 127 tokens per session scan A 5f17653fe2b9
skmtc-model is a skill published in the GitHub repository skmtc/skmtc (19 stars, last pushed 4d ago), licensed Apache-2.0. It adds 127 tokens to every session and 2,540 once invoked, about $0.0006 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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