Claude to compare debt payoff simulations
An author revived an older debt-payoff project with Claude Code and published the resulting debt.ski simulator. The concrete problem was comparing repayment plans when balances have different rates or promotional periods, rather than treating every loan as one fixed-rate balance.
Suggested prompt
Suggested prompt written by Agents In Use, not the source author. Replace bracketed inputs and review tool permissions first.
Build a debt-payoff simulator that compares avalanche payments with randomized alternatives. Model promotional expiries and split-rate balances, show assumptions, and label every saving as simulated.
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See placements →What happened
The author reports a functional debt-payoff comparison tool with promotional-rate and balance-transfer inputs, not verified real-world savings.
Reported by u/imanateaterHow the agent did it
- Enter balances and their interest-rate or promotional-period details.
- Compare the conventional avalanche plan with the randomized alternative.
- Treat the results as modeled scenarios and inspect the assumptions before acting.
Where a person stepped in
No loan execution or payment approval is described; the public account concerns building and comparing simulations.
An author revived an older debt-payoff project with Claude Code and published the resulting debt.ski simulator. The concrete problem was comparing repayment plans when balances have different rates or promotional periods, rather than treating every loan as one fixed-rate balance.
In the author's replies, the conventional avalanche approach supplies a starting point. The program then tries thousands of randomized payment variations and keeps better results it finds. Promotional-rate expiries and multiple rate segments within a balance make those comparisons more complicated than sorting accounts by today's interest rate.
The interface lets a user compare the avalanche plan with the project's alternative and edit balance-transfer details. This is a working simulation tool reported by its builder, not a record that the author paid off a particular debt or saved a stated amount in a bank account.
The replies also separate implemented work from future ideas. An investment comparison was discussed, but that algorithm was not yet integrated. A sample saving discussed in the thread was modeled, not realized. Nor does finding a better simulated schedule prove a globally optimal solution for every possible loan arrangement. The reusable artifact is the comparison itself: changing assumptions exposes how rates and promotional deadlines affect the modeled repayment path.
Prompt
Suggested prompt (written by Agents In Use, not the author's)
Source: www.reddit.com · u/imanateater
Frequently asked questions
Does the tool prove an optimal repayment plan?
No. The author describes finding better schedules through randomized simulation, not proving a universal optimum.
Was the sample saving money actually recovered?
No. It was a simulated comparison rather than documented payments or interest savings.
Was investment comparison already included?
The author discussed a separate investment algorithm, but said it was not integrated yet.
More details
About this account
Claude Code helped revive the simulator; the program explores randomized payment schedules against an avalanche starting point.
Firsthand source opened and read. Suggested prompt written by us from the reported workflow; no original task prompt is quoted.
Credit: u/imanateater
Source published 25 Dec 2025
Source checked 14 Oct 2026
Tools and topics
Claude Code · debt.ski · Randomized simulations
Debt payoff modeling · Promotional rates · Scenario comparison
Editorial completeness: 100/100. Measures documented fields, not agent performance or verified outcomes.