Write Tool Contracts That Survive Ambiguous Requests
Reliable agent tools need clear meanings for identity, filters, missing fields, result completeness and errors, beyond valid structured input.
Agentic Systems 3 min read
Blog
Notes from building and operating AI systems, commerce platforms and the measurement around them.
Checking an AI Answer Before a Customer Sees It
Separate fluent generation from evidence checks for prices, product identifiers, links, and policy claims before releasing an AI response.
AI Engineering 3 min read
Choose a Workflow Before Choosing an Autonomous Agent
A practical way to decide which steps need model judgment, which belong in code, and where an agent should be allowed to choose its next action.
Agentic Systems 3 min read
Hybrid Search with PostgreSQL: When Keywords Still Matter
Combine semantic retrieval with lexical search while preserving identifiers, access filters, and a measurable baseline for ranking quality.
AI Engineering 3 min read
Start a RAG System with Questions It Must Not Answer
A retrieval system needs evidence for answering and a deliberate path for missing evidence. Negative cases make that boundary measurable.
AI Engineering 3 min read
Designing Webhooks for Duplicates and Delayed Events
Build webhook receivers that verify input, accept work durably, handle duplicate deliveries, and reconcile state when events arrive late.
Backend Architecture 3 min read
Tenant Isolation Has to Follow the Data
Why tenant isolation must extend through database queries, caches, background jobs, retrieval, and support tooling in a SaaS application.
Backend Architecture 3 min read
Sanexo: Working Across a Hyvä Storefront and a Luma Checkout
Lessons from owning Sanexo’s Magento platform, where a Hyvä storefront and Luma checkout shared one customer journey.
Commerce Engineering 3 min read
Making n8n Workflows Safe to Retry
A workflow can fail after its external action succeeds. Design retries around business operations, checkpoints, and explicit failure states.
Backend Architecture 3 min read