hook-writer-sms

hook-writer-sms is a skill for Claude Code, Codex from blacktwist/social-media-skills. It costs 167 tokens per session (3,410 once invoked), scanned A, original, MIT.

A writing guide for creating opening lines that make people want to keep reading or watching on social media.

In plain words
What is it for?
Writing and improving hooks, headlines, video openings, thumbnail titles, and other first lines for social platforms.
Why use it?
It helps solve the problem of posts losing attention before the main message is seen.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Writing and improving hooks, headlines, video openings, thumbnail titles, and other first lines for social platforms.

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Install with agentmods
npx agentmods add skills/blacktwist/social-media-skills/hook-writer-sms
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.

Any agent
npx skills add blacktwist/social-media-skills --skill hook-writer-sms
Clone the repo
git clone --depth 1 https://github.com/blacktwist/social-media-skills

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 hook-writer-sms

README.md
[![agentmods](https://agentmods.dev/badge/skills/blacktwist/social-media-skills/hook-writer-sms/github.svg)](https://agentmods.dev/skills/blacktwist/social-media-skills/hook-writer-sms)
Your own site
<a href="https://agentmods.dev/skills/blacktwist/social-media-skills/hook-writer-sms"><img src="https://agentmods.dev/badge/skills/blacktwist/social-media-skills/hook-writer-sms/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 hook-writer-sms

Your own site · 80×15
<a href="https://agentmods.dev/skills/blacktwist/social-media-skills/hook-writer-sms"><img src="https://agentmods.dev/badge/skills/blacktwist/social-media-skills/hook-writer-sms.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 167 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,410 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Socket pass 1 May 2026
  • Snyk pass 1 May 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00167 $0.03410
Opus 5 $0.00084 $0.01705
Sonnet 5 $0.00033 $0.00682
Haiku 4.5 $0.00017 $0.00341

Measured 13d ago against content hash dc415686473d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

hook-writer-sms 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 13d 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.

skills/hook-writer-sms/SKILL.md · 308 lines

How it starts

The opening of the file, as written. The whole thing — 308 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Hook Writer

When to Use

  • User asks to write a hook, opening line, or first sentence
  • User mentions "hook," "opening line," or "first line"
  • User says "scroll stopper," "attention grabber," or "headline"
  • User asks "how to start my post" or "nobody reads past my first line"
  • User wants multiple hook variants to test for a given topic
  • User shares a draft and wants the opening line improved

Role

You are an expert social media copywriter specializing in hooks — the opening lines that stop the scroll, earn the click, and make someone feel like they have to keep reading. Your job is to generate high-converting first lines across nine proven patterns, adapted for each platform's culture and character limits.

Context Check

Before generating hooks, read .agents/social-media-context-sms.md (if it exists) to understand the user's voice, tone, niche, and platform preferences. Adapt all output to match their established style.


Hook Pattern Library

1. Contrarian

What it does: Challenges conventional wisdom and rewards the reader for pausing.

Examples:

  • "Stop posting every day. It's killing your engagement."
  • "Everyone says you need a niche. They're wrong."
  • "Cold outreach is not dead. Your cold outreach is dead."

When it works best: When you have a genuinely different perspective backed by experience or data. Overused without substance, it becomes noise.


2. Question

What it does: Provokes curiosity and makes the reader feel personally addressed.

Examples:

  • "What if everything you know about content strategy is wrong?"
  • "Why do 90% of creators quit before they make their first dollar?"
  • "Have you ever wondered why some posts go viral and yours don't?"

When it works best: When the question is specific, non-obvious, and directly relevant to your audience's actual fears or desires. Avoid generic questions.


3. Story Opener

What it does: Pulls the reader into a narrative immediately — no setup required.

Read the full file on GitHub · 308 lines

Files

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.

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. 13d ago First seen · 308 lines · 167 tokens per session scan A dc415686473d

Subscribe to this mod's changes

hook-writer-sms is a skill published in the GitHub repository blacktwist/social-media-skills (498 stars, last pushed 4mo ago), licensed MIT. It adds 167 tokens to every session and 3,410 once invoked, about $0.0008 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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