Solo Builders
A safer workbench for fast launches.
Keep the speed of a builder toolchain while adding the boundary, routing logic, and spend controls that make the project survivable once real users arrive.
OPENAI_BASE_URL=https://proxy.spendplane.com/v1
SPENDPLANE_POLICY=solo-builder-default
SPENDPLANE_ROUTE=auto
SPENDPLANE_MONTHLY_CAP=25
status: security scan passed
Point your editor or app at Spendplane once
Apply a default builder policy and budget cap
Keep the same path when the project goes live
Editor
Keep Cursor or VS Code
Boundary
Route through Spendplane
Launch
Keep the same path live
Graduation moment
Crossing the production threshold.
The shift from a private prototype to a public release changes the cost of mistakes. A stray secret, an unbounded loop, or a bad provider default becomes a privacy, reliability, and billing issue the moment real traffic arrives.
Prototype velocity
Keep the editor, prompts, and model loop fast while the product is still taking shape.
Protected prompts
Catch secrets, identifiers, and stray internal notes before they harden into the default workflow.
Spend discipline
Add routing and budget rules before one successful experiment becomes the expensive path forever.
Builder stack
$ cursor .
$ spendplane connect
$ spendplane policy apply builder-default
$ spendplane route test --budget 25
What changes
Keep your editor and prompt loop exactly where they are.
Add a single boundary where secrets and identifiers can be caught.
Hand the project to testing or collaborators without redoing the model path.
A better next step
Harden your AI stack.
Your builder stack needs more than an LLM client. It needs a defensive perimeter. Spendplane replaces direct provider calls with a safer gateway for routing, fallbacks, and spend enforcement while the code stays lean.
Global Spend Guardrails
Set hard limits on LLM usage before launch week traffic turns into an unexpected bill.
Smart Model Fallbacks
Route to smaller or backup models automatically when your primary path gets expensive, slow, or unavailable.
Instant Request Observability
Review prompts, latency, and token cost without building a logging stack before you ship.
Solo Builder Path