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:
- Identify the right tactic for the situation
- Generate a copy-paste email reply
- Suggest timing (send now vs wait)
- 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.