When the Revision Changes, the Approval Expires
A small revision-bound approval check and what its tests do—and do not—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
A review contract for an agent-authored pull request
A design note about scoped access, revision-bound evidence, protected checks, and recovery when an agent proposes a change. Published on DEV, 27 September 2026.
From the archive
What Passing Tests Leave Unresolved
A small 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.
The Agent-Ready API Is Not an API With an MCP Server
A practical set of API properties for agent-facing workflows: explicit effects, idempotency, bounded retrieval, typed failures, and recovery.
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