Oakland, California

Hi, I’m Jason.

I lead engineering teams building developer platforms, infrastructure, and AI developer tools. I also build open-source tools and other projects on my own time.

What I'm working on

Mobile & Desktop app

Your desktop has a cast now, and everyone has something to teach you.

Talk Show

Coming in November 2026.

Just launched · VS Code extension

MatchStyle

Make important text stand out in VS Code.

Style text matching your regex rules with custom fonts, sizes, weights, and colors. Make TODO markers, Markdown headings, or multilingual text easier to read while the rest of the editor keeps its usual styling.

Get it on VS CodeSource code

A closer look

Scroll through. Open any image to see the details.

  • MatchStyle colors TODO, FIXME, and HACK markers in a VS Code editor example.
  • MatchStyle uses a larger font to make Korean text easier to read beside English text.
  • MatchStyle gives log severity labels distinct colors for faster scanning.
  • MatchStyle sizes Markdown headings by level in the VS Code editor.

Now live · Open-source Obsidian plugin

FirstRecall

Turn your Obsidian notes into active-recall practice.

FirstRecall is an open-source plugin for Obsidian Desktop. It creates recall questions and study cards from your notes. In Study Mode, you try an answer before revealing the source. Your Markdown stays unchanged. Choose your own AI provider, or use the hosted Simonides preview.

Get it on ObsidianSource code

A closer look

Scroll through. Open any image to see the details.

  • Test what you remember: FirstRecall Study Mode hides the source until you reveal the answer.
  • Turn your notes into study cards: summaries, recall questions, and key terms beside your Obsidian notes.
  • Focus your review: a Note Brief with the core idea, review priorities, and a self-test.
  • Choose your AI: use the included Simonides trial, an API key, terminal apps, or a local model.

Now live · Free preview

Simonides

An optional hosted AI service for FirstRecall.

Simonides generates recall material from the note sections you select. The free preview requires no account, API key, or payment details.

Explore Simonides
FirstRecall’s AI settings with Simonides hosted AI trial selected, alongside API key, terminal app, and local server options.
Select Simonides in FirstRecall’s AI model settings to get started. Open the screenshot for a closer look. Generation sends the selected note content to Simonides. You can also use FirstRecall with your own cloud or local provider.

In progress

Thoughtmark

Thoughtmark saves your social likes and bookmarks in a personal archive, organized by folder and tag so you can find them again.

Thoughtmark showing saved X likes and bookmarks in a three-column card layout, with folders and search.

Recently shipped

LLM-Now

One command for the LLM providers you already use.

LLM-Now discovers local, CLI, and cloud providers, saves reusable shortcuts, and keeps model output clean for scripts and pipes.

brew install swartzrock/tap/llm-nowView on GitHub
BYOK Runtime provider picker showing Anthropic, OpenAI, Gemini, xAI, OpenRouter, Ollama, Codex CLI, and Claude CLI options

byok-runtime

In progress

Build BYOK AI apps with one TypeScript API for user-owned cloud keys, local models, model discovery, and CLI providers.

View repository

Where I've worked

Stripe

Financial infrastructure

Twitch

Live video

Snowflake

Data cloud

Sentry

Application monitoring

I’manengineeringleaderwith20+yearsscalingdeveloperplatforms,infrastructure,andtheteamsbehindthematStripe,Twitch,Snowflake,andSentry.I’veruntwoteamsofsevenatonceandshippedsolutionsthatsavedcompaniesmillionsayear.

More projects

TypeScript

obsidian-settings-float-plugin

An Obsidian desktop plugin that makes the core Settings modal and catalog dialogs movable and resizable.

TypeScript

pace

A visual countdown timer for the command line, with a choice of colorful renderers. Run `preview` to see them all.

Go

ecsview

Browse your AWS ECS clusters right from the terminal.