Work that runs.

I’m Daniel Ahn. From a front-end foundation, I became a full-stack, agentic engineer. I ship infrastructure for AI agents, an assistant of my own that I talk to, and fixes that GitLab’s and Sui’s maintainers merge.

Front end
Full stack
Upstream
Agents + voice

Now: agents, and the trust and voice they need

What I build on my own time

Shipped · npm

SweeTrust

Trust rails for AI agents. A person grants an agent bounded authority (mandate), every action passes one enforcement point (gate), and a stranger can check the record afterwards (verify). Since 0.6.0 it has an intent layer: a signed purpose, a judge you bring, and doubt never moves money.

TypeScript
zero runtime deps
Apache-2.0

How it holds

sweetrust · the interesting branchnpm i sweetrust · 0.6.0

 const email   = Sourced.fromChannel(raw, 'email-inbound')
 const account = Sourced.fromLLM(iban, 'ExtractInvoice', [email])
 const amount  = Sourced.fromLLM(40_000, 'ExtractInvoice', [email])
 await pay({ to: account, amount })
→{
   ok: false,
   refusal: '⚠ pay refused: to requires verified
     but is UNTRUSTED (origin: llm:ExtractInvoice) · …',
   receipt: {
     decision: 'refused',
     seq: 0, prevHash: 'genesis',
     hash: '29ad0c14…',
   },
 }

The refusal is a receipt too. It sits on the same hash chain as every allowed call, so a stranger can audit what was stopped as well as what went through.

Private · in daily use

Swee Agent, an assistant I talk to

My own agent harness, running on a private server I control, that I call from an Android app. It reads my Gmail and runs my calendar; it has no way to send email. Not public, so here it is as the wiring.

Python
LiveKit Agents
Deepgram
Hermes (open source)
Android

What it can touch

Where I work, and where I worked

Described at the level each company allows

Frontend Engineer · Los Angeles

Gallatin AI

Navigator plans the movement of people, equipment and cargo. I work on the layers underneath — the ones that decide whether a plan survives a burst of edits, a dead network, or an agent writing to it.

Gallatin AI · the data layera move I proposed and led

 SWRV
→TanStack Query
→TanStack DB
→local-first

Software Engineer · Remote

ExploreLearning

Math and science simulations used in classrooms. I modernized a decade-old JavaScript core onto Vue 3 without the simulations ever going dark.

ExploreLearning · the simulation corenever a big-bang cutover

 Macromedia Director · Lingo
→HTML5 rebuild
→RequireJS · jQuery
→Vue 3, incremental, no cutover

Upstream: code other teams chose to merge

Their maintainers, their review

Merged · gitlab-org

3merged at GitLabacross two repositories

gitlab-lsp !4725workflow-executor: snapshot the rejected token before the upgrade
contributors !3074Convert IssueUrlRegexUtils to TypeScript
gitlab-lsp !4628telemetry: the circuit breaker’s two log messages were swapped

gitlab-lsp !4725 · node_executor.tsone line, moved up

+const rejectedToken = this.#socketConnectionDetails?.token;
⋯⋯
−const rejectedToken = this.#socketConnectionDetails?.token;

Merged · MystenLabs

13merged at MystenLabsacross four repositories

ts-sdks #1032deepbook-v3: repay_base / repay_quote no longer drain balance when amount is 0
sui-rust-sdk #218sui-sdk-types: property-based tests for type_tag parsing
ts-sdks #898parseStructTag rejects malformed inputs

ts-sdks #1032 · repayBasezero means zero

−value: amount ? tx.pure.u64(convertQuantity(amount, baseCoin.scalar)) : null,
+amount !== undefined ? convertQuantity(amount, baseCoin.scalar) : null,

Write-ups · the reasoning before the diff

Three fixes, each with its why

ts-sdks #1032Repaying zero repaid everything
Asking to repay nothing repaid everything. A falsy zero, in code that moves money.
sui-rust-sdk #218A parser proved against its grammar
A parser is not proven by the inputs you thought of. Generate the grammar instead.
pinia-colada #568The cancel that did not cancel
Cancel stopped the request but not the timer, so a cancelled query came back to life.

Merged · posva/pinia-colada

3fixes, merged by posva

Three merged by posva — who wrote Pinia Colada, and also Pinia and Vue Router. All three are the same class of bug: state that stays correct right up until something is cancelled, collides, or resolves out of order.

pinia-colada #568 · retry.tsmerged by posva

−if (name === 'remove') {
+} else if (name === 'remove' || name === 'cancel') {
+  cacheEntry.ext.isRetrying.value = false
+  cacheEntry.ext.retryCount.value = 0

Twenty-one merged in all, two of them elsewhere. Every merge and package

Open, under review · not merged

MystenLabs/sui #26855, consensus: make sub-dag block ordering a total order, sorted by BlockRef.

Lab: the craft, up close

Live on the site · every one works without a mouse

/lab/key-inspector