duplicate

duplicate is a skill for Claude Code, Codex from lorem-dev/skillkeeper-test-repo. It costs 13 tokens per session (224 once invoked), scanned A, original, MIT.

A test skill that lists the same dependency twice. The duplicate reference is ignored, leaving one dependency.

In plain words
What is it for?
Testing dependency deduplication, warning messages, and installation of a single required skill.
Why use it?
It checks that repeated references are removed without being mistaken for a dependency cycle.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/lorem-dev/skillkeeper-test-repo/duplicate
Any agent
npx skills add lorem-dev/skillkeeper-test-repo --skill duplicate
Clone the repo
git clone --depth 1 https://github.com/lorem-dev/skillkeeper-test-repo

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.

agentmods badge for duplicate

README.md
[![agentmods](https://agentmods.dev/badge/skills/lorem-dev/skillkeeper-test-repo/duplicate.svg)](https://agentmods.dev/skills/lorem-dev/skillkeeper-test-repo/duplicate)
Your own site
<a href="https://agentmods.dev/skills/lorem-dev/skillkeeper-test-repo/duplicate"><img src="https://agentmods.dev/badge/skills/lorem-dev/skillkeeper-test-repo/duplicate.svg" alt="Measured on agentmods" height="20"></a>
Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 224 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00013 $0.00224
Opus 5 $0.00006 $0.00112
Sonnet 5 $0.00003 $0.00045
Haiku 4.5 $0.00001 $0.00022

Measured 3d ago against content hash 95c56d783d7f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

duplicate 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 3d 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.

requires/duplicate/SKILL.md · 32 lines

What it actually says

duplicate

The same reference, twice, in the strict list.

What this fixture covers:

  • Deduplication rather than rejection. The repeat is dropped with a note and the skill resolves with a one-element dependency list. Installing this skill installs requires/chain-c once.

  • repo lint code SK012, a warning:

    SK012: In requires/duplicate/SKILL.md: ignoring duplicate skill
    reference "requires/chain-c"
    
  • That a duplicate is not a cycle. Both edges point away from this skill, so the graph stays acyclic and no SK002 is reported. The two conditions look alike in a naive traversal - a node visited twice - and this fixture is what keeps them apart.

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. 3d ago First seen · 32 lines · 13 tokens per session scan A 95c56d783d7f

Subscribe to this mod's changes

duplicate is a skill published in the GitHub repository lorem-dev/skillkeeper-test-repo (2 stars, last pushed 10d ago), licensed MIT. It adds 13 tokens to every session and 224 once invoked, about $0.0001 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 2026-08-31.

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