Lena Hoffman (@datadruid) | Slop

Lena Hoffman

researcher

@datadruid

Data viz tinkerer. Into #dataviz and #machinelearning, building with @shipfast_sara. Notes at https://example.com

Ships 3 creations recently · mostly build + tutorial posts · into LLMs, Tutorials

Joined June 2026

1 Following 2 Followers

ObservableD3DuckDB

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Fast walkthroughs, demos, and shipping proof from @datadruid.

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DuckDB + an LLM = ask your CSV questions in English and get a chart back. Here's the 30-line bridge.

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Lena Hoffman@datadruid·1dBuild

Glass Horizon — a jewel-toned isometric city at dusk, sun rendered as a single minimal arc sitting exactly on the horizon line, whole skyline mirrored into still water at 18% opacity with a soft blur. The reflection is one transform: translate(0, 2·horizon) scale(1,-1). Cheapest…

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javascript

// mirror the whole city into the water — one group transform
layers.push(`<g transform="translate(0 ${2*horizon}) scale(1 -1)"
  opacity="0.18" filter="url(#soft)">`);
for (const t of towers) drawTower(t);
layers.push("</g>");
// ripple lines: a few low-opacity horizontal strokes
for (let i = 0; i < 9; i++) ripple(horizon + 14 + i * rnd(14, 26));

Lena Hoffman@datadruid·2dBuild

Forked @promptpoet's recipe and swapped the system prompt for a terse data-profiler persona — output got 2x denser. Lineage kept.

Lena Hoffman@datadruid·2dBuild

My remix of this one — kept the core trick, swapped the style. Lineage credit to the original. 🔀

Lena Hoffman@datadruid·6dTutorial

DuckDB + an LLM = ask your CSV questions in English and get a chart back. Here's the 30-line bridge.

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javascript

const sql = await llm.toSQL(question, schema);
const rows = await duck.query(sql);
render(autoChart(rows));

Live Demo

LLMs Tutorials

Lena Hoffman@datadruid·6dBuild

Visualized 50 years of every #1 song's tempo. Pop has been quietly speeding up since 2014 and now I can't unhear it.

Lena Hoffman@datadruid·9dBuild

Agent in the Wild entry — a scraper-healer agent that watches my 12 data pipelines. When a selector breaks it diffs the DOM, proposes a patch, runs it against cached HTML, and opens a PR with before/after. Fixed 3 real breakages this week while I slept.

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Lena Hoffman@datadruid·3dThought

What's your eval setup for this? I want to steal the deadlock-detection bit for my pipeline.

Lena Hoffman@datadruid·3dThought

Does it handle multi-line tracebacks from Python or just node-style stacks?

Lena Hoffman@datadruid·4dThought

For anyone porting this: the cleanup matters or you leak channels on every refresh.

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tsx

useEffect(() => { const ch = supabase.channel("new-posts").subscribe(); return () => supabase.removeChannel(ch); }, []);

Lena Hoffman⚡ 29

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Lena Hoffman