What does downgrade_model actually do — change the model, or recommend it?

Not stated. The README names continue, downgrade_model and stop as the three outcomes and says nothing more, so whether the app acts on that value or merely displays it is unresolved from the documentation.

How is cost weighed against value, and in what units?

Undocumented. The phrase is a cost-against-value dashboard with no formula, no currency and no definition of value, so the ranking is not inspectable from the README.

Does it track real spend, or do I type the budget in myself?

Unknown. No integration and no persistence are mentioned, and the stated inputs are a budget and a plan, which suggests both are supplied rather than measured. The source is where to confirm.

Can the model just keep telling me to continue?

A stop option exists in the label set, but no threshold, veto rule or abstain path is documented. Nothing here constrains how often continue is returned or what evidence would be required for it.

What are the setup commands for SpendBrake?

npm i then npm run dev. The README documents no key, config file, or environment variable beyond those commands.

What language is SpendBrake written in?

It is cataloged as TypeScript. The README names no framework, runtime version, or dependencies.

Is SpendBrake part of a larger set of Jev demos?

Yes. It is one of eight demos cataloged under the GitHub user ndolinschi, alongside JevPlay, LaneBreak, McpMatch, PulseLane, SwarmRouter, ToolGate, and TrustGate.

CommunityJev Demos & Experiments

Spendbrake

SpendBrake turns a budget plus a plan into one of three calls — continue, downgrade_model or stop — and renders the cost against value as a dashboard, with the decision made by TypeSafe Jev.

See highlights

Open github.com

Stars: 0
Language: TypeScript
Published by: Community
Author: ndolinschi
Last verified: Oct 2026

ndolinschi/spendbrake

User repository on GitHub

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Agent budget brake — continue / downgrade_model / stop via TypeSafe Jev

Forks: 0
Last pushed: Updated Sep 2026

Repo stats from the GitHub API, cached Oct 2026.Homepage

About this project

Budget + plan → continue / downgrademodel / stop — cost×value dashboard powered by TypeSafe Jev.

Quoted from the project's README. Read the full README.

Tagscommunity jevbest catalog-import awesomejev

Works forJev for Classification Jev for Tool calling

Used inJev for Software & DevTools

Languages: TypeScript

Highlights

The output space is fixed at three values: continue, downgrade_model, stop.
Inputs are a budget and a plan, and the decision is made by TypeSafe Jev.
The reasoning is presented as a cost-against-value dashboard, per the README.

Watch out

The three labels are named but never defined: there is no threshold, no unit of value, no currency assumption, and no statement of what happens on the continue path or how downgrade_model is applied — whether it is advice, a setting change or an action taken. No persistence, spend tracking over time, alerting or integration is documented, and no failure modes for the model are given. Treat the dashboard as an illustration of the decision shape rather than as cost control. Copy reviewed against the repository README on 2026-10-04, not from running it.

Questions about this entry

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