Launched.

worth knowing

• Listings from photos: visual search, live comps and eBay taxonomy mapping feed a model that writes the listing, and nothing posts until you review it.
• Every model call returns JSON against a schema, falls back to a second provider once if it fails, and logs its time, tokens and cost.
• An eval harness grades each pipeline version against what users actually changed, and replays old inputs before a change ships.
• A pricing bake-off across Gemini, Claude, GPT and the full pipeline on hundreds of real sold listings, with the bar written down first.
• The free half: fee calculators for nine marketplaces, shipping calculators, label printers and about 330 price guides refreshed weekly.

worth knowing

• The factory: a GitHub issue becomes a ticket, skills do the work, checks fail loudly, and every change is reviewed, merged, deployed and checked live.
• A new shop is one skill run: port the category, collect eBay listings, write the picks, make the photos, check the voice, launch.
• Prices only come from dated snapshots refreshed twice a week through the eBay API. Nothing is written from memory, and tests enforce it.
• One 24-hour stretch: a homepage redesign and a Next.js upgrade across all 44 sites, each reviewed, merged, deployed and checked live.
• All static on Cloudflare, so the hosting bill is $0, and every bug the QA loop finds becomes a permanent check.

worth knowing

• The round trip: a lead emails a vendor with a quote ID in the reply-to, and the reply comes back through a signed webhook and is filed against the lead.
• Demo mode keeps it safe in public: fictional vendors, an in-memory database, blocked outbound calls, and an outbox in place of real email.
• It can't run up a bill: rate limits, an origin lock, and a $5 budget alert that takes the demo private on its own.
• Four QA passes at phone and desktop widths before it went up.

worth knowing

• Every machine is a plug-in product line, so checkout, webhooks and fulfillment never change when a new one is added.
• What you see is what prints: the browser preview and the print file run through the same rendering code, with bundled fonts.
• AI actions (Gemini) are capped at $4 a month. Each one reserves its worst-case cost before it runs, with an hourly image limit per visitor.
• Printed text is moderated on every line, and text meant for a later AI step is sealed on the server, so a visitor can't swap in their own prompt.
• Photo uploads wait behind a consent box, and ordering is closed, so nothing is for sale.

worth knowing

• Rebuilt an old Express and Socket.IO app as a Cloudflare Worker with one Durable Object per room, so it runs free and fails closed instead of billing.
• The first phone to scan holds the room. Any other phone waits until the presenter lets it in, and joins are rate-limited per IP.
• Both sides re-join after a network drop, and the room waits five minutes for a refreshed laptop.
• Your PDF never leaves the laptop: pdf.js renders it there, and only the slide number crosses the network.
• The built-in rate limiter let 80 joins in a row through when measured live, so a strict per-IP limit went in on top.

worth knowing

• The form agent reads labels, names and placeholders, so it handles split names, split phone numbers, guest-count dropdowns and month, day and year selects.
• It finds the form on /contact when the homepage only has a newsletter box, and stops at a captcha instead of trying to get past it.
• Claude turns each reply into the same structured quote: price range, what's included, deposit, lead time and a confidence score. Auto-replies are dropped before any model call.
• A real finding from the run: on a vague reply, Claude merged a weekday floor and a weekend range into one band. The page shows it rather than hiding it.
• Never run against real venues: the original persona posed as a couple, and that's not outreach worth automating.

worth knowing

• The engine is written from scratch in TypeScript: a fixed-timestep loop, tile physics with coyote time and jump buffering, scenes, parallax, particles and a synth for the music.
• A search bot proves every stage can be cleared without taking a hit, and a second bot with human-like timing errors checks it's fair.
• Plays on a phone in landscape or portrait, with big touch pads, or with a keyboard on desktop.
• Backgrounds were generated with Codex, then snapped to one shared palette by a script. Kit and the hazards are drawn in code.
• Holds 60 fps on a phone emulated at a quarter of its CPU speed.

worth knowing

• A formula engine written for the browser runs 24 functions live against sample data, so you can edit a formula and watch the result change.
• The engine re-computes every challenge answer in a test, so a wrong puzzle fails the build.
• Built by the factory's agents in spring 2026, killed for no traction, then brought back: 38 of 61 formula pages were opening on an error, and now none do.

worth knowing

• Each decade gets its own period terminal and wormhole, and the reveal lands with a stamped multiplier.
• Before it went up, the crypto figures were checked against cited sources and corrected, and every reveal says what its numbers are.
• Chrome passed text that Safari smeared, so the QA loop now runs both engines.