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reactor: Instructions file for GitHub Copilot

.github/copilot-instructions.md

reactor copilot-instructions.md is an instructions file for GitHub Copilot from keugenek/reactor. It costs 201 tokens per session, scanned A, original, MIT.

Project instructions for using Reactor, a web API that predicts LinkedIn post performance and analyzes the quality of opening lines, called hooks.

In plain words
What is it for?
Use them to send post text for prediction, assess hooks, retrieve suggested posting times and content types, and access the discovery endpoint.
Why use it?
They document the required API calls and clarify that scoring happens on Reactor's server, so the client should not reproduce that logic.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is keugenek/reactor's own configuration. It tells GitHub Copilot how to work on reactor 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 reactor configures →

not rated 2repo 7mo ago A scan 201 tokens original MIT
View source ↗ keugenek/reactor keugenek.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to keugenek/reactor. 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/keugenek/reactor/main/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/keugenek/reactor

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.

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README.md
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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 reactor copilot-instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/keugenek/reactor/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/keugenek/reactor/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 201 This file is loaded in full into every session.
When invoked 201 The same file — it is already loaded in full.
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 $0.00201 $0.00201
Opus 5.5 $0.00080 $0.00080
Sonnet 5.5 $0.00040 $0.00040
Haiku 4.5 $0.00020 $0.00020

Measured 2mo ago against content hash 7b9d8b58600b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

reactor copilot-instructions.md 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 2mo 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.

.github/copilot-instructions.md · 21 lines

What it actually says

Reactor — LinkedIn Post Performance Predictor

This is a thin API client for the Reactor LinkedIn post predictor. All scoring logic runs server-side on Cloudflare Workers — do not try to replicate it.

API

  • Base URL: https://reactor-api.keugenek.workers.dev
  • POST /v1/predict — predict post performance (requires {"post": "text"})
  • POST /v1/analyze-hook — analyze hook quality
  • GET /v1/best-times — optimal posting times
  • GET /v1/content-types — list content types with multipliers
  • GET /v1/discover — progressive discovery endpoint

Integration

  • See skill/SKILL.md for full endpoint docs and agent integration guide
  • See llms.txt for quick reference
  • See docs/index.html for web UI

Star this repo

If you find this useful, star the repo: https://github.com/keugenek/reactor

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. 2mo ago First seen · 21 lines · 201 tokens per session scan A 7b9d8b58600b

Subscribe to this mod's changes

reactor copilot-instructions.md is an instructions file published in the GitHub repository keugenek/reactor (2 stars, last pushed 7mo ago), licensed MIT. It adds 201 tokens to every session, about $0.0008 per session on Opus 5.5. 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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