Journal
Notes from real projects - AWS, DynamoDB, Rust, home servers, and whatever open source tool I'm currently building.
Articles
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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Running iai-callgrind on Apple Silicon
iai-callgrind needs Valgrind. Valgrind has zero Apple Silicon support. Here's the native arm64 Docker workaround I use to run deterministic instruction-count benchmarks locally - seccomp trap, --locked gotcha and all.
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How close is your DynamoDB emulator to AWS?
My DynamoDB conformance suite has a site now. Eight emulators, 684 tests, all scored against live AWS DynamoDB, with fresh results every run - standings, per-target history and the full matrix included.
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Filing my first security advisory
Logged into GitHub yesterday, hit a Dependabot alert on dynoxide, ended up filing my first GHSA. Here's what I'd tell past-me about the form, the order of operations, and the bug itself.
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Dynoxide patch notes: 0.9.10 to 0.9.12
Notes from the latest stretch of dynoxide patch releases - what shipped, what got fixed, and the takeaways.
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