A framework for building SKMTC generators that turn component schemas into code definitions. A schema describes the shape and rules of data, including references, optional fields, arrays, and unions.

Use it when creating a model generator for a target library, including support for references, recursion, nullable fields, maps, enums, arrays, objects, and unions.

Writing each generator from scratch makes common edge cases easy to miss. The provided structure and tests give generators a consistent starting point.

skmtc-model — Skill for Claude Code by skmtc/skmtc

Install

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.

Any agent

npx skills add skmtc/skmtc --skill skmtc-model

Clone the repo

git clone --depth 1 https://github.com/skmtc/skmtc

Made for: Claude Code.

Or install skmtc, the plugin that ships this one along with the rest of its 12 skills.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/skmtc/skmtc/skmtc-model/github.svg)](https://agentmods.dev/skills/skmtc/skmtc/skmtc-model)

Your own site

<a href="https://agentmods.dev/skills/skmtc/skmtc/skmtc-model"><img src="https://agentmods.dev/badge/skills/skmtc/skmtc/skmtc-model/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/skmtc/skmtc/skmtc-model"><img src="https://agentmods.dev/badge/skills/skmtc/skmtc/skmtc-model.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 127 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,584 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

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	$0.02584
Opus 5.5	$0.00051	$0.01034
Sonnet 5.5	$0.00025	$0.00517
Haiku 4.5	$0.00013	$0.00258

Measured 6d ago against content hash 54669972ba4c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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.

The scan reads SKILL.md. This mod also ships 15 executable files (skeleton/mod.test.ts, skeleton/mod.ts, skeleton/src/base.ts, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

deno/docs/skills/skmtc-model/SKILL.md · 181 lines

How it starts

The opening of the file, as written. The whole thing — 181 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; run deno test --allow-env --allow-sys --allow-read — 6 green tests prove the machinery before you touch anything.
Rename: name in deno.json; MyLib → YourLib in class names and filenames; myLibEntry → yourLibEntry; then src/lib.ts — LIB_MODULE (emitted module specifier) and LIB (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.ts to 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)

Read the full file on GitHub · 181 lines

Files

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.

Changes

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 Changed 54669972ba4c
27d ago Changed d6919de75df3
1mo ago Changed · +2 lines 43e11a153642
1mo ago First seen · 179 lines · 127 tokens per session scan A 5f17653fe2b9

Subscribe to this mod's changes

skmtc-model is a skill published in the GitHub repository skmtc/skmtc (19 stars, last pushed yesterday), licensed Apache-2.0. It adds 127 tokens to every session and 2,584 once invoked, about $0.0005 per session on Opus 5.5. 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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