matimo: Skill for Claude Code

.github/skills/matimo-provider-creation/SKILL.md

matimo-provider-creation is a skill for Claude Code, Codex from tallclub/matimo. It costs 49 tokens per session (4,193 once invoked), scanned A, original, MIT.

A guide for creating Matimo provider packages for TypeScript and Python. Providers package tools that connect Matimo to external services, with definitions, authentication patterns, governance fields, and tests.

In plain words
What is it for?
Use it to create provider package files, write and validate tool definitions, search for existing implementation patterns, fetch official API documentation, and run tests or linting.
Why use it?
It gives contributors a consistent way to define and validate provider tools instead of guessing the repository's format. It also separates provider development from tools created for an agent while it is running.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

This is tallclub/matimo's own configuration. It tells Claude Code and Codex how to work on matimo itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything matimo configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is See [CONTRIBUTING.md](../../CONTRIBUTING.md).

Reuse

Borrowing it

Nothing to install: this file belongs to tallclub/matimo. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/tallclub/matimo/main/.github/skills/matimo-provider-creation/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/tallclub/matimo

Made for: Claude Code, Codex.

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.

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README.md
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Your own site
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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.

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Your own site · 80×15
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Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,193 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.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00049 $0.04193
Opus 5.5 $0.00020 $0.01677
Sonnet 5.5 $0.00010 $0.00839
Haiku 4.5 $0.00005 $0.00419

Measured 1mo ago against content hash ce66bf050ffd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

matimo-provider-creation 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 1mo 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.

.github/skills/matimo-provider-creation/SKILL.md · 531 lines

How it starts

The opening of the file, as written. The whole thing — 531 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Matimo Provider Creation — TypeScript & Python

This skill teaches the comprehensive workflow for creating production-grade provider packages in both TypeScript and Python SDKs with identical patterns and full Matimo tool integration.

Quick Reference: Agent Tool Mapping

Objective Tool Usage
Write tool YAML edit/createFile Write definition.yaml in the package directory (both SDKs)
Validate YAML matimo_validate_tool yaml_content → schema errors and policy notes
Validate all tools execute → pnpm validate-tools Schema plus repo rules (DELETE needs requires_approval: true, function tools need risk:)
Validate Skill matimo_validate_skill Check a SKILL.md against the Agent Skills spec
Search Code search Find existing patterns/tools to copy from
Execute Commands execute Run tests and linting (the user approves each command)
Fetch Web Content web Retrieve official API documentation

Never use matimo_create_tool for a provider package. It is the runtime meta-tool for agents: it writes ./matimo-tools/<name>/definition.yaml, forces status: draft and requires_approval: true, and asks a human before it runs. A draft only runs for the admin role, so a provider tool written this way would not work for users.


Part 1: Universal Provider Structure

TypeScript Provider Package

typescript/packages/{provider}/
├── package.json                              # {"name": "@matimo/{provider}", "type": "module"}
├── definition.yaml                           # OAuth2 provider config (if OAuth2)
├── README.md                                 # Usage guide, examples, auth setup
├── tools/
│   ├── {tool-1}/
│   │   └── definition.yaml                   # HTTP tool: YAML only
│   └── {tool-2}/
│       ├── definition.yaml                   # Function tool: code: ./{tool-2}.js
│       └── {tool-2}.ts                       # compiled to {tool-2}.js by the package build
├── skills/
│   └── {provider}/SKILL.md                   # Agent knowledge document
└── test/
    ├── unit/
    │   └── {tool-1}.test.ts
    └── integration/
        └── {provider}-tools.test.ts

Read the full file on GitHub · 531 lines

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.

  1. 1mo ago First seen · 531 lines · 49 tokens per session scan A ce66bf050ffd

Subscribe to this mod's changes

matimo-provider-creation is a skill published in the GitHub repository tallclub/matimo (18 stars, last pushed yesterday), licensed MIT. It adds 49 tokens to every session and 4,193 once invoked, about $0.0002 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 2026-10-05.

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