Alex_Plug_In: Instructions file for GitHub Copilot

.github/instructions/service-worker-offline-first.instructions.md

Alex_Plug_In service-worker-offline-first.instructions.md is an instructions file for GitHub Copilot from fabioc-aloha/Alex_Plug_In. It costs 656 tokens per session, scanned A, original, no licence file.

An instruction guide for building web applications that continue working when the network is unavailable or unreliable. It covers service workers, which are browser processes that can cache files and handle requests in the background.

In plain words
What is it for?
It is for offline-first web apps, caching strategies, service-worker lifecycle handling, and progressive web app resilience.
Why use it?
It helps applications load useful content offline and recover more reliably from interrupted connections.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is fabioc-aloha/Alex_Plug_In's own configuration. It tells GitHub Copilot how to work on Alex_Plug_In 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 Alex_Plug_In configures →

Reuse

Borrowing it

Nothing to install: this file belongs to fabioc-aloha/Alex_Plug_In. 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/fabioc-aloha/Alex_Plug_In/main/.github/instructions/service-worker-offline-first.instructions.md
Clone the repo
git clone --depth 1 https://github.com/fabioc-aloha/Alex_Plug_In

Made for: GitHub Copilot.

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 Alex_Plug_In service-worker-offline-first.instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/fabioc-aloha/alex_plug_in/service-worker-offline-first/github.svg)](https://agentmods.dev/instructions/fabioc-aloha/alex_plug_in/service-worker-offline-first)
Your own site
<a href="https://agentmods.dev/instructions/fabioc-aloha/alex_plug_in/service-worker-offline-first"><img src="https://agentmods.dev/badge/instructions/fabioc-aloha/alex_plug_in/service-worker-offline-first/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 Alex_Plug_In service-worker-offline-first.instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/fabioc-aloha/alex_plug_in/service-worker-offline-first"><img src="https://agentmods.dev/badge/instructions/fabioc-aloha/alex_plug_in/service-worker-offline-first.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 656 This file is loaded in full into every session.
When invoked 656 The same file — it is already loaded in full.
Security scan A 1 finding. 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 $0.00656 $0.00656
Opus 5 $0.00328 $0.00328
Sonnet 5 $0.00131 $0.00131
Haiku 4.5 $0.00066 $0.00066

Measured 6d ago against content hash 33be40998349, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

Alex_Plug_In service-worker-offline-first.instructions.md scanned grade A with 1 finding 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 6d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

fetch(request),
.github/instructions/service-worker-offline-first.instructions.md · 92 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 6d ago First seen · 92 lines · 656 tokens per session scan A 33be40998349

Subscribe to this mod's changes

Alex_Plug_In service-worker-offline-first.instructions.md is an instructions file published in the GitHub repository fabioc-aloha/Alex_Plug_In (5 stars, last pushed 4mo ago), with no licence file. It adds 656 tokens to every session, about $0.0033 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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