ownership

ownership is a skill for Claude Code from vinnie357/claude-skills. It costs 31 tokens per session (157 once invoked), scanned A, original, MIT.

A reference guide to Rust’s rules for owning, borrowing, and sharing data, including slices and lifetime annotations.

In plain words
What is it for?
Use it when writing or reviewing Rust code involving move semantics, references, slices, or lifetime annotations.
Why use it?
It helps explain borrow-checker errors and avoid guessing about when Rust allows data to move or be used through a reference.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the rust plugin — 6 skills, 2 agents shipped together

Good fit Use it when writing or reviewing Rust code involving move semantics, references, slices, or lifetime annotations.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/vinnie357/claude-skills/ownership
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 vinnie357/claude-skills --skill ownership
Clone the repo
git clone --depth 1 https://github.com/vinnie357/claude-skills

Made for: Claude Code.

Or install rust, the plugin that ships this one along with the rest of its 6 skills, 2 agents.

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 ownership

README.md
[![agentmods](https://agentmods.dev/badge/skills/vinnie357/claude-skills/ownership/github.svg)](https://agentmods.dev/skills/vinnie357/claude-skills/ownership)
Your own site
<a href="https://agentmods.dev/skills/vinnie357/claude-skills/ownership"><img src="https://agentmods.dev/badge/skills/vinnie357/claude-skills/ownership/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.

agentmods 80×15 button for ownership

Your own site · 80×15
<a href="https://agentmods.dev/skills/vinnie357/claude-skills/ownership"><img src="https://agentmods.dev/badge/skills/vinnie357/claude-skills/ownership.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 157 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 $0.00031 $0.00157
Opus 5 $0.00015 $0.00078
Sonnet 5 $0.00006 $0.00031
Haiku 4.5 $0.00003 $0.00016

Measured 11d ago against content hash 0352556f3a47, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

ownership 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 11d 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.

plugins/languages/rust/skills/ownership/SKILL.md · 19 lines

What it actually says

Rust Ownership and Borrowing

Ownership rules, borrowing, slices, and lifetimes.

For ownership rules, borrowing patterns, slices, and lifetime annotations, see references/ownership.md.

Anti-fabrication

This skill follows core:anti-fabrication. Every claim about ownership, borrowing, and lifetime rules is verified against the official Rust Book chapters cited in sources.md — not inferred from generic familiarity with the language. Before asserting borrow-checker behavior this skill and its references do not cover, check the installed Rust toolchain's documentation rather than guessing.

Files

What ships with it

1 file 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.

  1. 11d ago First seen · 19 lines · 31 tokens per session scan A 0352556f3a47

Subscribe to this mod's changes

ownership is a skill published in the GitHub repository vinnie357/claude-skills (25 stars, last pushed yesterday), licensed MIT. It adds 31 tokens to every session and 157 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 2026-08-30.