JOURNAL / PRODUCT ENGINEERING

Engineering decisions.
Explained in practice.

Practical guides to reliable systems, from tenant isolation and integrations to AI retrieval and product operations.

Page 2 of 7 · Articles 13–24 of 84

Conceptual editorial illustration of a luminous AI reasoning core launching parallel tool work while an abstract amber steering signal redirects the active path toward a verified checkpoint; not an OpenAI interface.

GPT-6 agent loops: async tools, steering and safe recovery

A production guide to GPT-6 async tool calling and mid-turn steering with pending-work registries, WebSocket recovery, approvals, budgets and observability.

9 min readRead article

Conceptual editorial illustration of an AI request crossing a latency router into standard and ultrafast lanes, then passing through verification and fallback controls; not an OpenAI interface.

AI infrastructure · API latency14

OpenAI Ultrafast mode: engineer latency, not just token speed

A production guide to routing GPT-6 Astra Ultrafast requests with WebSockets, latency budgets, rate limits, residency checks, fallbacks and cost controls.

9 min readRead article

Conceptual editorial illustration of requests entering a model-routing gateway, taking efficient, balanced and frontier compute paths through safety gates, then converging on a verified outcome; not an OpenAI interface.

AI · Model routing15

GPT-6.1 Sol in production: route by evidence, not hype

A practical architecture for adopting GPT-6.1 Sol with model routing, prompt caching, bounded tools, eval gates, fallbacks and cost-quality telemetry.

10 min readRead article

Conceptual editorial illustration of layered build inputs moving through a BuildKit cache lattice and sealed secret boundary into one verified runtime artifact; not a real Docker interface.

DevOps · Docker BuildKit16

Secure Docker builds: fast caches without leaked secrets

A production guide to BuildKit layer, mount and registry caches; secret isolation; multi-stage runtime images; and verifiable SBOM and provenance.

10 min readRead article

Conceptual illustration of three product packages passing through a deterministic transformation gate and becoming one grouped Shopify bundle; not a real Shopify interface.

E-commerce engineering · Shopify17

Shopify bundles: design the cart transform contract

A production guide to fixed and customized Shopify bundles: composition, pricing, inventory, Cart Transform operations, failure policy and reconciliation.

8 min readRead article

Editorial concept of a Claude Code event chain with prompt, tool, permission, policy and interface stages connected as modular middleware.

AI developer tools · Claude Code18

Claude Code Mods: event middleware for safer AI coding

Anthropic’s new Mods can rewrite Claude Code events and UI. Here is how to use them safely, test their order and choose between Mods, hooks, Skills and MCP.

10 min readRead article

Conceptual production RAG pipeline showing documents becoming chunks and embeddings, passing through a vector database, retrieval and reranking gates, then forming cited context for an LLM.

AI · RAG architecture19

Production RAG: from chunks to grounded LLM answers

A production design for chunking, embeddings, Qdrant retrieval, reranking, context assembly, citations and evaluation—with clear alternatives to RAG.

11 min readRead article

Conceptual SaaS security architecture with a verified tenant context flowing through isolated API, service, queue and database lanes while a cross-tenant request is blocked.

SaaS · Tenant isolation20

SaaS tenant context: propagate identity without data leaks

A production architecture for deriving trusted tenant identity once, carrying it across APIs and jobs, and enforcing isolation at every data boundary.

10 min readRead article

Conceptual Kubernetes infrastructure illustration showing pods receiving measured CPU and memory capacity while node headroom and overload risk remain visible.

Kubernetes · Resource management21

Kubernetes requests and limits: capacity without throttling or OOM

A production method for sizing Kubernetes CPU and memory requests, choosing limits, protecting nodes and keeping HPA signals meaningful.

10 min readRead article

Conceptual data-infrastructure illustration showing many application connections queued and multiplexed through PgBouncer into a bounded PostgreSQL connection set.

Databases · Connection pooling22

PostgreSQL connection pooling: protect capacity with PgBouncer

A production guide to sizing PgBouncer as an admission-control queue instead of turning PostgreSQL max_connections into an unsafe concurrency target.

9 min readRead article

Conceptual illustration of an AI agent trajectory passing through tool-contract, approval, execution and evaluation gates before entering a feedback dataset.

AI agents · Tool evaluation23

Evaluate MCP tool-using agents: score the whole trajectory

A production evaluation contract for AI agents that discovers, selects, approves and calls MCP tools without hiding unsafe or duplicated effects behind a good answer.

10 min readRead article