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.
npx skills add jonathimer/devmarketing-skills --skill github-presencegit clone --depth 1 https://github.com/jonathimer/devmarketing-skillsWrote 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.
[](https://agentmods.dev/skills/jonathimer/devmarketing-skills/github-presence)<a href="https://agentmods.dev/skills/jonathimer/devmarketing-skills/github-presence"><img src="https://agentmods.dev/badge/skills/jonathimer/devmarketing-skills/github-presence/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.
<a href="https://agentmods.dev/skills/jonathimer/devmarketing-skills/github-presence"><img src="https://agentmods.dev/badge/skills/jonathimer/devmarketing-skills/github-presence.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00060 | $0.03149 |
| Opus 5.5 | $0.00024 | $0.01260 |
| Sonnet 5.5 | $0.00012 | $0.00630 |
| Haiku 4.5 | $0.00006 | $0.00315 |
Grade C, and why
github-presence scanned grade C 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 1mo 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- BLOG-POST-LIST:START --> How it starts
The opening of the file, as written. The whole thing — 470 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GitHub Presence
GitHub is where developers evaluate your project before trying it. This skill covers README optimization, profile READMEs, discoverability through topics and awesome lists, and using GitHub features for marketing.
Before You Start
- Read
.agents/developer-audience-context.mdif it exists - Audit your current GitHub presence (profile, pinned repos, READMEs)
- Understand: GitHub is often the first technical evaluation — optimize accordingly
README Structure
The Anatomy of a Great README
| Section | Purpose | Required? |
|---|---|---|
| Logo/Banner | Brand recognition, visual appeal | Recommended |
| Badges | Quick trust signals, status | Recommended |
| One-liner | What it does in one sentence | Required |
| Hero example | Immediate "what does it look like?" | Highly recommended |
| Features | Why use this over alternatives | Required |
| Quick start | Get running in < 2 minutes | Required |
| Installation | All installation methods | Required |
| Usage | Core usage examples | Required |
| Documentation | Link to full docs | Required |
| Contributing | How to contribute | Recommended |
| License | Legal clarity | Required |
README Template
<div align="center">
<img src="logo.svg" alt="Project Name" width="200">
<h1>Project Name</h1>
<p><strong>One compelling sentence explaining what this does.</strong></p>
<!-- Badges -->
<a href="https://github.com/org/repo/actions"><img src="https://github.com/org/repo/workflows/CI/badge.svg" alt="CI"></a>
<a href="https://www.npmjs.com/package/name"><img src="https://img.shields.io/npm/v/name.svg" alt="npm version"></a>
<a href="https://github.com/org/repo/blob/main/LICENSE"><img src="https://img.shields.io/badge/license-MIT-blue.svg" alt="License"></a>
<a href="https://discord.gg/invite"><img src="https://img.shields.io/discord/123456789" alt="Discord"></a>
<br>
<br>
<a href="https://docs.example.com">Documentation</a> •
<a href="https://example.com">Website</a> •
<a href="https://discord.gg/invite">Discord</a>
</div>
---
## Why Project Name?
- **Feature 1** — Brief explanation
- **Feature 2** — Brief explanation
- **Feature 3** — Brief explanation
## Quick Start
```bash
npm install project-name
import { thing } from 'project-name';
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.
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.
- 1mo ago First seen · 470 lines · 60 tokens per session scan C 5dd7d30848ee
github-presence is a skill published in the GitHub repository jonathimer/devmarketing-skills (87 stars, last pushed 7mo ago), licensed MIT. It adds 60 tokens to every session and 3,149 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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