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car-lease-negotiator

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SUMMARY

Claude Code skill for negotiating car leases over email using Chris Voss tactics + lease calculator

README.md

Car Lease Negotiator

A Claude Code skill for negotiating car leases over email. Uses Chris Voss's tactical negotiation methodology ("Never Split the Difference") adapted for written dealer communication.

What's Included

  • Negotiation Skill (.claude/skills/car-negotiator/) - Voss-based tactics adapted for email: labeling, calibrated questions, accusation audits, no-oriented questions, Ackerman bargaining, tactical silence
  • Lease Calculator (tools/check-deal.js) - Validate any dealer quote instantly. Catches money factor markup, calculates true payment, scores the deal.
  • Voss Tactics Reference - Full playbook with car-specific scripts for 9 common dealer scenarios

Quick Start

# Clone into your project
git clone https://github.com/assafkip/car-lease-negotiator.git
cd car-lease-negotiator

# Install the lease calculator dependency
npm install

# Create your car spec (copy and edit the example)
cp car-spec.example.json car-spec.json

# Check a dealer quote
node tools/check-deal.js 61395 57533 12750

Using the Skill

Once installed, paste any dealer email into Claude Code and ask "what should I reply?" The skill will:

  1. Identify the right tactic for the situation
  2. Generate a copy-paste email reply
  3. Suggest timing (send now vs wait)
  4. Predict the dealer's likely response and prepare your next move

The Deal Checker

# Basic usage: msrp, selling_price, incentives
node tools/check-deal.js 61395 57533 12750

# Full usage: msrp, selling_price, incentives, mf, rv, term, tax_rate
node tools/check-deal.js 61395 57533 12750 0.00250 0.64 36 0.09

Output includes:

  • Full payment breakdown (depreciation, rent charge, tax)
  • Money factor markup detection (compares to buy rate)
  • $/10K MSRP benchmark score
  • Deal verdict (good / average / bad)

Negotiation Tactics

The skill implements these Voss techniques for email:

Technique When to Use
Labeling Dealer pushes back or shows constraint
Calibrated Questions Dealer makes demands or tries to close
No-Oriented Questions Making a bold ask
Accusation Audit First email or re-engaging after stall
Mirroring Dealer makes a claim you want elaborated
Tactical Silence After making an offer (wait 4-24 hours)
Ackerman Bargaining Price negotiation rounds
Loss Aversion You have competing options

Configuration

Edit car-spec.json with your target vehicle and lease terms. The skill reads this file to calibrate all negotiation language.

License

MIT

Built by Assaf

I spent 12 years in threat intelligence reading adversaries from their written moves. A dealer email thread is the same game with smaller stakes.

This free version is the skill + calculator. The paid kit ($29) adds the Deal Room (paste a quote, get the score + counter + walk-away number), the email-by-email Thread Playbook, the dealer Fee Checklist, and a no-terminal install.

More tools at claudedaddy.io.

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