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/boron-letters

Master Gary Halbert's direct response copywriting principles from \"The Boron Letters\" (1984). The timeless fundamentals that separate pros from amateurs. Use when: Writing direct response copy (sales letters, emails, ads); Creating headlines that demand attention; Building

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Claude Code

$ npx -y skills add guia-matthieu/clawfu-skills --skill boron-letters --agent claude-code

SKILL.md

boron-letters.SKILL.md
name: boron-letters
description: "Master Gary Halbert's direct response copywriting principles from \"The Boron Letters\" (1984). The timeless fundamentals that separate pros from amateurs. Use when: Writing direct response copy (sales letters, emails, ads); Creating headlines that demand attention; Building mailing lists and segmentation; Improving copy through the A-pile test; Learning copywriting fundamentals from scratch"
license: MIT
metadata:
  author: ClawFu
  version: 1.0.0
  mcp-server: "@clawfu/mcp-skills"

Boron Letters Copywriting

> Master Gary Halbert's direct response copywriting principles from "The Boron Letters" (1984). The timeless fundamentals that separate pros from amateurs.

When to Use This Skill

  • Writing direct response copy (sales letters, emails, ads)
  • Creating headlines that demand attention
  • Building mailing lists and segmentation
  • Improving copy through the A-pile test
  • Learning copywriting fundamentals from scratch
  • Diagnosing why copy isn't converting

Methodology Foundation

**Source**: Gary Halbert - "The Boron Letters" (1984)

**Core Principle**: "Become a student of markets, not products." The list matters more than the copy. The A-pile beats the B-pile. Long copy outsells short. And the fundamentals of human psychology never change.

**Why This Matters**: These letters were written in the 1980s but remain the gold standard for direct response copywriting. Halbert's "coat of arms" letter mailed over 600 million times. The principles work because they're based on human psychology, not trends.

What Claude Does vs What You Decide

| Claude Does | You Decide | |-------------|------------| | Structures production workflow | Final creative direction | | Suggests technical approaches | Equipment and tool choices | | Creates templates and checklists | Quality standards | | Identifies best practices | Brand/voice decisions | | Generates script outlines | Final script approval |

What This Skill Does

1. **Applies the A-pile test** - Gets mail opened and read 2. **Identifies starving crowds** - Finds markets hungry to buy 3. **Uses the AIDA formula** - Structures persuasive copy 4. **Writes irresistible headlines** - Stops readers cold 5. **Creates long-form sales copy** - Converts readers to buyers

How to Use

Apply the A-Pile Test

Review this email/letter through Halbert's A-pile framework:
[paste copy]
Will it get opened? Will it get read? What's missing?

Write Sales Copy

Write a Halbert-style sales letter for:
Product: [description]
Target market: [who]
Main pain point: [problem]
Unique mechanism: [how it works]

Find a Starving Crowd

Analyze this market using Halbert's starving crowd criteria:
[market/niche]
Is this a good market for direct response?

Instructions

When applying Halbert's methods, follow these core principles:

The A-Pile / B-Pile Concept

## Getting Into the A-Pile

**The Reality:** Everyone divides their mail into two piles:

### A-Pile (Opens First)
- Looks personal
- From people they know
- Handwritten or unusual
- Demands immediate attention

### B-Pile (Trash or "Later")
- Obviously promotional
- Mass-produced appearance
- Corporate/bulk mail look
- Easy to ignore

**The Rule:** Your FIRST job is getting into the A-pile.
Nothing else matters if you fail this test.

### A-Pile Tactics

**Physical Mail:**
- Handwritten envelope (or looks handwritten)
- First-class stamp (not bulk mail indicia)
- No teaser copy on envelope
- Real name as sender
- "Lumpy mail" - include physical object

**Email:**
- Personal sender name (not company)
- Subject line like personal message
- No obvious promotional language
- Conversational tone
- Relevant and specific

**Online:**
- Pattern interrupt in first line
- No stock photo headers
- Personal voice
- Addresses reader directly

### The B-Pile Death Spiral

If you look like everyone else, you get treated like everyone else:
→ Ignored → Deleted → Unsubscribed → Forgotten

**Examples:**

| B-Pile (Death) | A-Pile (Life) |
|----------------|---------------|
| "Newsletter: March Edition" | "Quick question for you" |
| "Exciting News Inside!" | "Saw this and thought of you" |
| "Company Name Updates" | "[First name] - about tomorrow" |
| Glossy corporate envelope | Hand-addressed envelope |

---

The 40/40/20 Rule

## What Actually Determines Success

| Factor | Weight | Meaning |
|--------|--------|---------|
| **List** | 40% | WHO you're mailing to |
| **Offer** | 40% | WHAT you're selling |
| **Copy** | 20% | HOW you say it |

**Implication:**
Finding the right audience matters 4x more than writing brilliant copy.

**The Starving Crowd Beats Everything**

Halbert's Hamburger Stand Test:
"If we were in a contest to sell hamburgers, what advantage would you want?"

Most say: Best meat. Best location. Lowest prices.

Halbert's answer: **"A starving crowd."**

**Lesson:** Find markets with desperate, urgent needs.
The starving crowd will buy despite mediocre copy.

### How to Find Starving Crowds

Look for:
- Urgent pain (not mild inconvenience)
- Emotional investment (identity, fear, desire)
- Recent trigger events (something just happened)
- Demonstrated buyer behavior (already spending money)

**Best Audiences:**
- People who recently bought similar products
- People going through major life transitions
- People with problems that keep them up at night
- People in growing, underserved niches

---

The RFU Formula (List Quality)

## Recency, Frequency, Unit

When evaluating a list, look at purchase behavior:

### Recency
How RECENTLY did they buy something similar?
- Within 30 days = hot
- Within 90 days = warm
- Over 6 months = cooling

### Frequency
How OFTEN do they buy in this category?
- Serial buyers = best
- Occasional buyers = good
- One-time buyers = risky

### Unit
How much do they typically SPEND?
- High unit buyers = premium opportunity
- Low unit buyers = volume play

**Best Prospect:**
So
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Questions about boron-letters.

Which coding agents can use boron-letters?
boron-letters installs in Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot, OpenCode and Windsurf with the skills CLI, using each agent's flag shown on this page. Flowy's auto-invocation, which fires a skill when your prompt matches, runs in Claude Code only.