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brepre109/README.md

Hi, I'm Brett 👋

Senior ecommerce platform engineer in Southern California. I build the systems behind multichannel commerce: Shopify Plus apps and Functions, marketplace integrations (Amazon SP-API, Walmart, Etsy, Faire, Wayfair), shipping software with direct FedEx/UPS APIs, ERP pipelines, and production AI agents.

15 years in ecommerce · Python · TypeScript · Go · Rust · SQL · Linux

📫 [email protected] · LinkedIn

🛒 Shopify & commerce integration

Repo What it does
shopify-tiered-discount-function Rust Shopify Function (Discount API) for quantity tiers and tag-based wholesale pricing; benchmarked against the 11M-instruction limit
shopify-fast-storefront Accessible headless Next.js storefront on Storefront-API-shaped data: Lighthouse 94–100, axe-tested variant picker and cart drawer
shopify-bulk-toolkit Safe bulk catalog edits over Admin GraphQL: mandatory dry-run plans, cost-aware throttling, resumable journal
commerce-order-sync-lab Idempotent Shopify → ERP order sync: HMAC webhooks, inbox/outbox, retries, dead-letter replay, fault injection
omnichannel-event-mapper Shopify, Amazon and TikTok Shop order and shipment events → one canonical timeline, with data-quality warnings

📦 Shipping & logistics

Repo What it does
carrier-rates FedEx and UPS OAuth rating clients with normalized quotes and offline fixture replay
box-packer 3D bin packing to find the cheapest box: DIM-weight billing and a carrier price-cliff analyzer
late-delivery-auditor Finds FedEx/UPS/USPS money-back-guarantee refunds, time-zone aware, rules cited from 2026 carrier terms

🤖 AI & agents

Repo What it does
support-reply-drafter Tool-calling support agent that drafts replies from order data, with an LLM-as-judge replay eval
agent-taskboard Task board for people and AI coding agents: transcripts, cost tracking, cron, full-text search
minicpm-agent Tool-calling agent on a 1B local model
papertrader LLMs competing in a paper-trading arena (Next.js)

🛠 Data & developer tools

jsonlake (Rust JSON→SQLite + jq) · sshmc (dual-pane SSH file commander) · show-ports · mdv · sheets-clone (Tauri spreadsheet)

🎮 Games (play in the browser)

Banners of the Realm (TypeScript strategy game: rules kernel, AI, map generator + editor, 2,300+ tests) · Cinderbanner (Three.js tactical RPG) · Marble Machine · Brick Mart · Jamblob Sandbox

Popular repositories Loading

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    Isometric tactical RPG for the browser in Three.js: charge-time battles, 30 jobs, a two-chapter campaign, map editor.

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    Cheapest-box picker: 3D bin packing, DIM-weight billing, pluggable rate providers, carrier price-cliff analyzer

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  6. carrier-rates carrier-rates Public

    Python library + CLI for FedEx and UPS rate quotes: OAuth caching, normalized quotes, offline fixture replay

    Python