Packgine: a compliance platform that has to be right
Packgine tells brands what they owe under EU packaging law and US state extended producer responsibility programs. Its readers use it to make filing decisions. A wrong date or a mis-cited statute is not a content defect, it is a compliance risk passed to a customer. We built it, and we operate it.
What we built
A server-rendered application on TanStack Start, deployed to edge workers. 117 indexable pages of regulatory content across the EU, the UK, and seven US states with enacted packaging EPR law. Sitemap, RSS, and machine-readable content indexes generated from the data layer at request time rather than from build artifacts, so they cannot go stale.
The engineering standard
The build fails if the SEO contract breaks. Duplicate title or description tags, a page missing from the sitemap that is linked internally, an unknown URL returning 200 instead of 404 — each of these stops a deploy rather than reaching production quietly.
Why accuracy is an engineering problem
Regulatory content decays. Statutes are repealed, deadlines move, court rulings land. In one accuracy pass we applied 34 corrections, each verified against a primary source: statute text from state legislatures, court dockets, and agency publications rather than secondary summaries.
The pass also surfaced something worth stating plainly. An AI-generated accuracy audit had flagged the site's content, and checking those findings against the statutes showed the audit itself was wrong in two places, in ways that would have replaced accurate statements with inaccurate ones. We caught it because we read the primary sources instead of trusting the review. That is the standard we hold, and it is the reason we do not let a model write a citation.
How we work
- Server rendering by default, so what a crawler or an AI agent reads is what a person reads.
- Verification before publication, with a primary source behind every claim that carries consequence.
- We operate what we ship, so the maintenance cost of a shortcut lands on us.