FullSpectrum records a session once and compiles it into an artifact — semantic locators, pre- and post-conditions — then replays it deterministically against a pinned Chrome. When a page drifts, replay stops and proposes a repair you can read, diff and approve.
Countable in the repository today
Work in a real browser once. Every click and keystroke becomes a validated step — semantic locator, pre-condition, post-condition — compiled before it ever replays.
checkout — 14 steps…When a locator drifts, replay stops. The repair is a diff with the evidence attached — approved by a person, kept forever, reversible.
button “Continue” → button “Next”One runtime behind a CLI, an HTTP API with TypeScript and Python SDKs, an MCP server for agents, and a macOS shell.
fs replay checkoutPages render from semantic JSON — a closed union of 38 block kinds, no origin script
or style. A .fs file is a page, an app with a typed data store, or an
exported webapp.
The second front door
One schema, two directions: authored JSON becomes a page, and a live page is captured
back to JSON. An agent reads the pricing section, not a div — and
the rendered page carries no script, style or markup from the origin.
{
"hero": {
"title": "Build faster with AI",
"cta": {
"text": "Get Started",
"style": "primary"
}
}
}<section class="hero" data-region="hero">
<h1>Build faster with AI</h1>
<a class="btn btn--primary">
Get Started
</a>
</section>Install the runtime, record a session in a real, headful browser, and replay it with zero model calls. Free for personal use, research and public institutions; a company pilot gets a 60-day evaluation licence, no fee.
