linkedin-hook-lab

A writing tool for creating ten different opening lines, or hooks, for one LinkedIn post topic. It scores the options using factors such as reader interest and effort, then recommends the best two.

In plain words
What is it for?
Use it when planning a LinkedIn post and need varied opening lines, scores for comparison, and a recommendation about which hooks to try first.
Why use it?
It removes the need to invent and compare many possible openings by hand. The short length is designed to keep the important part visible before LinkedIn truncates the post preview.

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/styfinity/linkedin-engine/linkedin-hook-lab
Any agent
npx skills add styfinity/linkedin-engine --skill linkedin-hook-lab
Clone the repo
git clone --depth 1 https://github.com/styfinity/linkedin-engine

Made for: Claude Code, Codex.

Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 529 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00041 $0.00529
Opus 5 $0.00020 $0.00264
Sonnet 5 $0.00008 $0.00106
Haiku 4.5 $0.00004 $0.00053

Measured 2d ago against content hash cb918e4d2ad7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

linkedin-hook-lab 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 2d 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/linkedin-hook-lab/SKILL.md · 39 lines

What it actually says

LinkedIn Hook Lab

The hook decides whether the post gets read. This skill writes ten openers across ten proven formulas, scores them, and hands you the two best.

Inputs

  • The topic and the audience it is for: $ARGUMENTS
  • The brief (persona tone, pains, offer, voice profile) loads automatically.

Do this

  1. Write one hook for EACH of the ten formulas, in this order:
    • Pattern-Break (says the unexpected thing first)
    • Counter-Intuitive Insight (the truth most people get backwards)
    • Experience-Led Observation (what you noticed doing the work)
    • Direct Consequence (the cost of ignoring this)
    • Confession + Result (an admission plus what it produced)
    • Numbered Promise (a specific count of takeaways)
    • Enemy-Hero-Gasoline-Teaser (name the villain, the win, the open loop)
    • BREAKING / News (frame it as fresh signal)
    • Stat-Anchored (X% vs Y%, a real or clearly-illustrative contrast)
    • Mechanism-Reveal (the "here is how it actually works" angle)
  2. Keep each hook under 235 characters so it survives the "see more" cut. Count them.
  3. Score each hook 1-10 on the four value levers (dream outcome, perceived likelihood, time-to-result, effort-and-sacrifice) plus scroll-stop power.
  4. Pick the top two. Say in one line why each beats the rest.

Output

A table of the ten hooks: formula, hook text, character count, score. Then the recommended two, each with a one-line reason. End with a note: pass the chosen hook to the post draft, then run /linkedin-humanizer on the result.

Rules

  • Counter-intuitive and BREAKING hooks must still be true and defensible. No claim the body cannot pay off.
  • No clickbait. If the hook over-promises, score it down and say so.
  • Real numbers only with honest attribution: "a post that did 12,000 impressions", never a named person or company.
  • No em-dashes. Draft only - the operator picks the winner and writes the post.
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. 2d ago First seen · 39 lines · 41 tokens per session scan A cb918e4d2ad7

Subscribe to this mod's changes

linkedin-hook-lab is a skill published in the GitHub repository styfinity/linkedin-engine (7 stars, last pushed 2mo ago), licensed MIT. It adds 41 tokens to every session and 529 once invoked, about $0.0002 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 2026-08-31.

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