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Field notes

Showing 1 - 12 of 61 Posts
Engineering11 min read

Building Fullscript Assist, Part 2: Keeping the Context Small

See how we treat the context window as a budget in Fullscript Assist: on-demand skills, isolated sub-agents, and auditable compaction.

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Software7 min read

Scaling Shopify's maintenance_tasks (Part 3): Observability and Governance for the Gem

See how Fullscript added durable logs, threaded Slack alerts, metrics, and self-cleaning governance around Shopify's maintenance_tasks gem.

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Engineering10 min read

Building Hospital-Grade Networks for Our Warehouse Operations

How Fullscript IT built hospital-grade network redundancy for automated warehouses — see how we design for the failure case first.

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Engineering16 min read

Building Fullscript Assist

How Fullscript rebuilt its clinical AI assistant with Elixir, BEAM processes, and MCP to support 120K+ providers with stateful conversations.

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Engineering7 min read

Scaling Shopify's maintenance_tasks (Part 2): Real-Time Progress for the Gem

Part 2: See how Fullscript layered live progress, shared lifecycle hooks, and queue isolation onto a gem they don't own — no fork required.

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Engineering7 min read

Scaling Shopify's maintenance_tasks (Part 1): A Custom UI for the Gem

How Fullscript rebuilt the maintenance_tasks UI as a React app over a JSON API — typed params, masked secrets, live status.

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Engineering10 min read

Using an LLM as a Test Compiler

End-to-end tests are usually expensive to maintain or too flaky to trust. We treated an LLM as a compiler to get tests that are neither.

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Technology11 min read

Why green tests stopped meaning shipped

Why green tests aren't enough for AI systems. Learn how evals catch behavioral regressions that unit tests miss.

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Technology4 min read

So You Want to Refactor Code with an Agentic Developer

Learn how agentic developers automate large-scale code refactors, reducing migration costs, engineering overhead, and delivery risk.

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Engineering6 min read

Feature-Flagging a Major Design System Upgrade

Shipping a major mobile redesign without stopping releases: adapters, build flags, and parallel design systems.

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Engineering4 min read

Being An Intern In The Age Of AI

What it’s like starting a software engineering career in the age of AI coding tools, code review, and agentic development.

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Engineering11 min read

Turning Wearable Noise Into Clinical Signal

Explore how we process wearable health data into personalized, explainable insights for clinical decision support.

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