When the revision changes, the approval expires
A revision-bound approval check and the narrow behaviour its tests establish.
I lead software teams and teach systems design.
I'm Mike Dabydeen, based in Toronto. I work on enterprise logistics APIs at Purolator Digital Lab and creator IP protection at UREEQA, and teach at Sheridan and Conestoga. I write about the decisions behind software that people need to operate and trust.
Recent writing
Systems Thinking Is Still the Work
A first-party note on why AI-assisted work still depends on effects, evidence, boundaries, and recovery. Published 2 October 2026.
From the archive
What passing tests leave unresolved
A review exercise for separating fixture coverage from the assumptions a change adds to an integration.
A Local-First Coding Agent Needs a Measurable Boundary
What a public Metron release makes visible about tool limits, approval, and evaluating local AI coding agents.
An agent-ready API needs more than an MCP server
Agent-facing APIs need explicit effects, idempotency, bounded retrieval, typed failures, and a recovery path.
Try the code review exercise
A shipment mapper passes its fixtures but invents a missing country. I put the code, worksheet, and worked answer together so you can inspect the assumption and make your own review decision.
Free, with no signup. This is an illustrative exercise.
Download the review kit (ZIP)Current work
- Purolator Digital Lab
- Manager of Software Development
- UREEQA
- VP of Engineering
- Sheridan and Conestoga
- Instructor