An install kit your own coding assistant reads and builds from. You hand it the folder, it builds one mechanism at a time, and a self-check that ships inside the kit proves each one runs on your machine.

Three paths. A scope gate that refuses a write outside what you declared, with a trace you can read back. A capability with a stated boundary and an eval that can actually fail. An unattended-run contract whose completion signal lands where the worker cannot write it.

Each path ships exactly one mechanism, proved. Not a survey of the subject.

It starts with a two-minute version: one pasted prompt, no install, no Node. You watch the mechanism work on your own screen before you build it properly.

Runs on Node 18 or newer. The kit verifies its own delivery and refuses to run on a partial download.

The exact file list, with sizes and checksums, is published before you download at: https://haldenbuilds.github.io/ferrule/manifests/

What you get, exactly:
-Release 1.0, delivered the moment you claim it. The download link stays live for 365 days.
-Built and tested on Node 18 or newer. That is a description of this release, not a promise about future ones.
-No subscription, no recurring charge, nothing to cancel.