headline-engineering

headline-engineering is a skill for Claude Code, Codex from assafkip/kipi-system. It costs 122 tokens per session (1,079 once invoked), scanned A, original, MIT.

A writing guide for creating titles and opening lines suited to X, Reddit, LinkedIn, Medium and Substack. It accounts for each platform's audience, length limits and common patterns.

In plain words
What is it for?
Use it to write or review a social-media headline, tweet, thread opening, Reddit title, LinkedIn title, Medium title or Substack hook.
Why use it?
It helps adapt the wording and length of a public-facing hook to the platform where people will see it.

Skill for Claude CodeCodex

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

Part of the kipi-core plugin — 10 skills, 7 commands shipped together

Good fit Use it to write or review a social-media headline, tweet, thread opening, Reddit title, LinkedIn title, Medium title or Substack hook.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/assafkip/kipi-system/headline-engineering
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 assafkip/kipi-system --skill headline-engineering
Clone the repo
git clone --depth 1 https://github.com/assafkip/kipi-system

Made for: Claude Code, Codex.

Or install kipi-core, the plugin that ships this one along with the rest of its 10 skills, 7 commands.

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 headline-engineering

README.md
[![agentmods](https://agentmods.dev/badge/skills/assafkip/kipi-system/headline-engineering.svg)](https://agentmods.dev/skills/assafkip/kipi-system/headline-engineering)
Your own site
<a href="https://agentmods.dev/skills/assafkip/kipi-system/headline-engineering"><img src="https://agentmods.dev/badge/skills/assafkip/kipi-system/headline-engineering.svg" alt="Measured on agentmods" height="20"></a>
Per session 122 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,079 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
  • 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 $0.00122 $0.01079
Opus 5 $0.00061 $0.00540
Sonnet 5 $0.00024 $0.00216
Haiku 4.5 $0.00012 $0.00108

Measured yesterday against content hash b709ab36c168, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

headline-engineering 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 yesterday.

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.

plugins/kipi-core/skills/headline-engineering/SKILL.md · 86 lines

How it starts

The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Headline Engineering

This skill fires whenever someone is writing or reviewing copy that has to earn a click.

It does NOT replace [[assaf-voice]] — voice DNA still applies. This skill handles the part voice doesn't: WHERE the copy will live and HOW that platform's audience decides what to click.

Load order

  1. Always load references/platform-hooks.md — the 6 viral patterns, char-count sweet spots, first-7-words rule.
  2. For specific platforms load references/headline-templates.md — proven shapes per platform with char counts.
  3. For challenges or updates load references/research-receipts.md — the source data behind every claim in this skill.

The decision tree

Apply in order:

Step 1 — Identify the platform. Different platforms have different optimal lengths and reward different shapes. Don't write a "headline" abstractly. Write for X, OR for Reddit, OR for LinkedIn, OR for Medium. The same idea gets phrased four different ways.

Step 2 — Identify the length range.

  • X: under 110 chars, sweet spot 71-100
  • Reddit text titles: 30-66 chars
  • LinkedIn long-form titles: 60-100 chars
  • Medium titles: 50-90 chars

Step 3 — Pick the pattern. Six patterns earn clicks (full detail in references/platform-hooks.md):

  • A. Absurd-concrete-object ("Real LLM on a Game Boy Color")
  • B. Confession + reversal ("I'm done with X")
  • C. PSA / "admits" exposé ("Anthropic admits X")
  • D. Specific number + impossible feat ("64-year-old problem solved")
  • E. Naive question ("Forgive my ignorance but how is X better than Y?")
  • F. "I asked X to..." setup ("I asked ChatGPT to imagine itself in retirement")

Step 4 — Front-load the punch. First 5-7 words decide whether anyone reads word 8. If the punch is "21-byte file," "21" goes in the first 7 words, not at the end.

Step 5 — Run the check. Three quick tests:

  • Word 7 test: cover everything after word 7. Does the hook still stop the scroll?
  • Specificity test: are there at least one specific number, name, or concrete object in the first 10 words?
  • Pattern test: which of A-F is this? If you can't name one, it's a generic AI-style title. Rewrite.

Read the full file on GitHub · 86 lines

Files

What ships with it

3 files 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. yesterday Changed b709ab36c168
  2. 9d ago First seen · 86 lines · 122 tokens per session scan A 67307c2c82a7

Subscribe to this mod's changes

headline-engineering is a skill published in the GitHub repository assafkip/kipi-system (110 stars, last pushed today), licensed MIT. It adds 122 tokens to every session and 1,079 once invoked, about $0.0006 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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