Testing env-sync

Testing env-sync is a skill for Claude Code, Codex from championswimmer/env.sync.local. It costs 20 tokens per session (305 once invoked), scanned A, original, no licence file.

Tests for env-sync's mDNS discovery and synchronisation logic across multiple virtual machines. mDNS is a local-network method for finding devices without a central server.

In plain words
What is it for?
Use them to test discovery and syncing between virtual machines on a local network.
Why use it?
They help check whether devices can find each other and exchange data correctly in different machines.

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/championswimmer/env.sync.local/test
Any agent
npx skills add championswimmer/env.sync.local --skill test
Clone the repo
git clone --depth 1 https://github.com/championswimmer/env.sync.local

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 Testing env-sync

README.md
[![agentmods](https://agentmods.dev/badge/skills/championswimmer/env.sync.local/test.svg)](https://agentmods.dev/skills/championswimmer/env.sync.local/test)
Your own site
<a href="https://agentmods.dev/skills/championswimmer/env.sync.local/test"><img src="https://agentmods.dev/badge/skills/championswimmer/env.sync.local/test.svg" alt="Measured on agentmods" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 305 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00020 $0.00305
Opus 5 $0.00010 $0.00152
Sonnet 5 $0.00004 $0.00061
Haiku 4.5 $0.00002 $0.00030

Measured 4d ago against content hash 50ce5e618f25, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Testing env-sync 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 4d 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.

.agents/skills/test/SKILL.md · 36 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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. 4d ago First seen · 36 lines · 20 tokens per session scan A 50ce5e618f25

Subscribe to this mod's changes

Testing env-sync is a skill published in the GitHub repository championswimmer/env.sync.local (41 stars, last pushed 5mo ago), with no licence file. It adds 20 tokens to every session and 305 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 2026-08-30.

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