Journal
Notes from real projects - AWS, DynamoDB, Rust, home servers, and whatever open source tool I'm currently building.
You can't pin DynamoDB to one region
My DynamoDB conformance suite took one AWS region as ground truth. Then that region started accepting a value the rest of AWS rejected, and weeks later reverted it. AWS ships changes region by region, so one region was never a safe baseline.
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Dynoxide 0.11.3: closing a Windows port hijack
Issue #23 asked for a Windows socket option investigation. It found the opposite problem: dynoxide's ports could be hijacked by a same-user process. 0.11.3 closes that, and the test suite now runs on Windows for the first time.
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Dynoxide 0.11.2: a stack of conformance fixes
Last week I pinned what a conditional DynamoDB transaction costs against real AWS. Dynoxide 0.11.2 makes the engine report the same numbers, fixes an UpdateTable bug that dropped your table keys, and closes a stack of projection and validation gaps.
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What a conditional DynamoDB transaction actually costs
Does a conditional write inside a DynamoDB transaction cost read capacity on top of the write, or is it write all the way down? The docs aren't clear, so I ran it against real DynamoDB and pinned what it costs, re-checked on every run.
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Dynoxide 0.11.1: four conformance fixes
A small dynoxide patch. Four fixes where the engine evaluated an expression or validated a number a bit differently from real DynamoDB, most of them checked back against real AWS.
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Learn DynamoDB by running it - accesspatterns.dev
DynamoDB is a brilliant database and a hard one to learn. So I built accesspatterns.dev - a real engine in a browser tab where you learn it by running it, from your first GetItem to single-table design. No AWS account, nothing to install.
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Dynoxide 0.11.0: wasm on npm, plus a stack of fixes
Dynoxide 0.11.0 packages the browser engine as @dynoxide/wasm-engine - npm install and run a DynamoDB engine client-side - and a stack of correctness fixes, most of them turned up by the conformance suite.
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I watched DynamoDB change under my conformance suite
The reference in my DynamoDB conformance suite went red: real AWS had reworded its validation errors. Two regions have the new wording, two still have the old - a rollout caught mid-flight, with the suite watching the reference move.
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Build the squad. Own the platform. The org chart will catch up.
Once the technology works, deploying AI agents becomes an organisational problem - where it lives, who owns it, who carries the risk. My answer: build a deployment squad, own the platform, and let the org chart catch up.
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Dynoxide 0.10.0: it runs in the browser now
The same DynamoDB engine now runs in a browser tab on OPFS, there's an official ~5 MB Docker image, and a storage-backend trait sits underneath it all. The biggest dynoxide release since the engine itself, and the first that breaks things.
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