Open source, with the details.

Tasuki

Phase 1 of 7 · proven locally

The delivery side of a business, as software you run next to your own. Your system creates a delivery over the API; Tasuki quotes a price and an ETA, dispatches the nearest courier on a real city road network, and streams the courier live to the customer's phone. Built to production standards: idempotent orders, a Kafka location pipeline, written SLOs, load tests and game days.

orders/h at full design scale, on one laptop

18,144

GPS points/s, with 0 failed orders

641

game-day plans; the first one run, with a postmortem

12

—The company is fictional and the traffic is simulated. The EKS and GitOps layers are written and checked, not yet run on a cluster.

Secure File Transfer

Source-available · design complete, build in progress

How a company sends confidential files to outside people without email attachments. Recipients prove their email address before they download, every file is encrypted and scanned for malware and personal data first, and an admin can revoke any link at any time. Planned like a large company's platform team: requirements, system design, a STRIDE threat model, ADRs, then the build.

measurable requirements, each with a way to prove it

26

decision records, with the options and trade-offs

22

operations in the OpenAPI contract

82

—Source-available, not open source: free to read and learn from, and commercial use needs a licence. The design is complete and the service is being built; the AWS layers are written and checked, not yet applied.

Private LLM Chat

Public · docs site with five guides

Open-weight models (Qwen, Llama, Gemma, DeepSeek) served with vLLM on Amazon SageMaker, several per GPU, with weights from S3, an optional no-internet VPC, and a GPU that switches itself off when idle. The Django and React app streams chat and handles documents, images and voice.

open-weight model families, several per GPU

4

GPUs running when idle

→ 0

guides, from a laptop to the full AWS stack

5

—No production users are claimed. The Google Cloud Run port is early.

Cartlift

Live · v0.1

Paste a store URL and get an annotated four-lens audit (CRO, SEO, trust, Google Merchant) in about 30 seconds. Cartlift drafts variants, ships them through a 3 KB snippet, and a Thompson-sampling allocator pins the winner, so there is no dashboard to babysit.

four-lens audit of a store page

~30 s

snippet that ships the variants

3 KB

confidence, plus 500 samples, before a winner is pinned

95%

Hearthline

Beta

An open-source AI receptionist for HVAC, plumbing, roofing and solar teams. It answers every inbound call through Vapi, qualifies the lead, books a slot, drafts a quote from a photo, and writes a structured lead into the dashboard. Self-hosted, with your own model and telephony keys encrypted at rest.

inbound calls answered and qualified

24/7

channels: phone, SMS, WhatsApp, email, web

5

UI languages, Japanese included

10