FOUNDATION: Skill for Claude Code

.claude/skills/mcp-create/SKILL.md

mcp-create is a skill for Claude Code from danielterra/FOUNDATION. It costs 43 tokens per session (1,621 once invoked), scanned A, original, AGPL-3.0.

A workflow for creating a new MCP tool, a program interface that lets an AI assistant call a specific external action. It covers the Rust handler, tool registration, execution dispatch, and ontology record.

In plain words
What is it for?
Use it to add an MCP tool to the Foundation system and connect its code, executor, registry, and ontology entry.
Why use it?
It turns the separate implementation and registration steps for a new tool into one defined process.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

This is danielterra/FOUNDATION's own configuration. It tells Claude Code how to work on FOUNDATION 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 FOUNDATION configures →

Reuse

Borrowing it

Nothing to install: this file belongs to danielterra/FOUNDATION. 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/danielterra/FOUNDATION/main/.claude/skills/mcp-create/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/danielterra/FOUNDATION

Made for: Claude Code.

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.

agentmods badge for mcp-create

README.md
[![agentmods](https://agentmods.dev/badge/skills/danielterra/foundation/mcp-create.svg)](https://agentmods.dev/skills/danielterra/foundation/mcp-create)
Your own site
<a href="https://agentmods.dev/skills/danielterra/foundation/mcp-create"><img src="https://agentmods.dev/badge/skills/danielterra/foundation/mcp-create.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,621 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 unknown 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 $0.00043 $0.01621
Opus 5 $0.00022 $0.00811
Sonnet 5 $0.00009 $0.00324
Haiku 4.5 $0.00004 $0.00162

Measured 2d ago against content hash 2837ec6359f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

mcp-create 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 2d 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.

.claude/skills/mcp-create/SKILL.md · 153 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 2d ago First seen · 153 lines · 43 tokens per session scan A 2837ec6359f8

Subscribe to this mod's changes

mcp-create is a skill published in the GitHub repository danielterra/FOUNDATION (19 stars, last pushed 1mo ago), licensed AGPL-3.0. It adds 43 tokens to every session and 1,621 once invoked, about $0.0002 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 2026-09-04.

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