Synthetic UI

Updated January 1, 1999

Published January 1, 1999

Terminal

Types itself out as you scroll past with animated, or renders instantly without.

>_zsh

❯

# scaffolding a new workspace…

◇ Project name → my-app

◆ Choose a framework → Next.js

✓ Dependencies installed

! 1 peer dependency to review

✓ Ready in 1.2s — http://localhost:3000

Chat

user / assistant / tool messages, revealed one at a time.

Returns assistant

Analyzing user profile

User

I want to return something I bought last week.

Agent

I can help with that. Could you share your order number?

User

It's #9281 — but I misplaced the packaging. Does that matter?

lookup_orderorder #9281 → eligible

Agent

No worries — original packaging isn't required. I'll initiate the return for #9281 right now.

File tree

Collapsible folders; highlighted nodes get a subtle stone emphasis.

components/synthetic

Browser frame

Wraps anything — screenshots, demos, content.

okf.dev/playground

Drop a screenshot or live demo here

Token stream

Streams a completion token-by-token with a tok/s read-out.

completion

~18 tok/s

Streaming keeps perceived latency low: the first token lands fast and the rest flow in while the user is already reading.

Tool call

The structured name(args) → result an agent runs.

tool call

get_weather()done

arguments

{
  "city": "Bangkok",
  "unit": "celsius"
}

result

{
  "temp": 33,
  "condition": "humid"
}

Benchmark bars

Bars grow from zero on scroll; emphasise the winner with highlight.

p99 latency (lower is better)

Go142 ms

Bun231 ms

Node318 ms

Stat cards

Throughput12.4k/s+18%

p99142 ms-23%

Cost / 1M$0.42

Charts

A small free-template chart kit — bar, stacked bar, line, area, pie, donut, radar — built the same way as everything else here: plain SVG/CSS, the stone palette, animated reveals on scroll, and a typed data/series prop so any .mdx post can plug its own numbers in.

Bar

Grouped bars; pass a series array for more than one bar per category.

okf signups by plan

0200400600800

320

410

480

512

600

124

690

161

JanFebMarAprMayJun

FreePro

Stacked bar

Same shape, segments stack into a single column per category.

Support tickets by status

010203040

MonTueWedThuFri

ClosedIn progressOpen

Line

Multi-series lines that draw themselves in; hover a point for its value.

Daily active users

This weekLast week

Area

Set stacked to band series on top of each other instead of overlaying them.

MRR by plan

FreeProTeam

Pie

Plan distribution

Free64%Pro24%Team9%Enterprise3%

Donut

Pass centerLabel to drop a total (or anything) in the hole.

Infra spend

$4.2k

Compute44%Storage15%LLM API33%Other8%

Radar

Feature adoption — okf vs. last quarter

This quarterLast quarter

Code diff

Additions in stone, removals in red — no green anywhere.

route.ts

export async function POST(req: Request) {

const body = await req.json();

- return Response.json(body);

+ const result = await handle(body);

+ return Response.json(result, { status: 200 });

}

Flow diagram

Nodes reveal in sequence, then a pulse loops along the chain.

request lifecycle

Clientfetch()

Edgemiddleware

Handler/api/chat

LLMstream

HTTP exchange

HTTP

POST/api/chat

{
  "message": "hello"
}

←200OK

{
  "reply": "hi there",
  "tokens": 42
}

Callouts

Note

These mockups are decorative — they render their full content for SEO even while the animation plays.

Reusable

Drop any of these into any .mdx post. They're all in components/synthetic.

Warning

Animations only fire once, when scrolled into view.

Heads up

Remember to register new posts in lib/blog/registry.ts.

Tabs

npm install okf

Keys

Open the palette with Cmd+K or search with Ctrl+/.

Synthetic UI

Updated January 1, 1999

Published January 1, 1999

Terminal

Types itself out as you scroll past with animated, or renders instantly without.

>_zsh

❯

# scaffolding a new workspace…

◇ Project name → my-app

◆ Choose a framework → Next.js

✓ Dependencies installed

! 1 peer dependency to review

✓ Ready in 1.2s — http://localhost:3000

Chat

user / assistant / tool messages, revealed one at a time.

Returns assistant

Analyzing user profile

User

I want to return something I bought last week.

Agent

I can help with that. Could you share your order number?

User

It's #9281 — but I misplaced the packaging. Does that matter?

lookup_orderorder #9281 → eligible

Agent

No worries — original packaging isn't required. I'll initiate the return for #9281 right now.

File tree

Collapsible folders; highlighted nodes get a subtle stone emphasis.

components/synthetic

Browser frame

Wraps anything — screenshots, demos, content.

okf.dev/playground

Drop a screenshot or live demo here

Token stream

Streams a completion token-by-token with a tok/s read-out.

completion

~18 tok/s

Streaming keeps perceived latency low: the first token lands fast and the rest flow in while the user is already reading.

Tool call

The structured name(args) → result an agent runs.

tool call

get_weather()done

arguments

{
  "city": "Bangkok",
  "unit": "celsius"
}

result

{
  "temp": 33,
  "condition": "humid"
}

Benchmark bars

Bars grow from zero on scroll; emphasise the winner with highlight.

p99 latency (lower is better)

Go142 ms

Bun231 ms

Node318 ms

Stat cards

Throughput12.4k/s+18%

p99142 ms-23%

Cost / 1M$0.42

Charts

Bar

Grouped bars; pass a series array for more than one bar per category.

okf signups by plan

0200400600800

320

410

480

512

600

124

690

161

JanFebMarAprMayJun

FreePro

Stacked bar

Same shape, segments stack into a single column per category.

Support tickets by status

010203040

MonTueWedThuFri

ClosedIn progressOpen

Line

Multi-series lines that draw themselves in; hover a point for its value.

Daily active users

This weekLast week

Area

Set stacked to band series on top of each other instead of overlaying them.

MRR by plan

FreeProTeam

Pie

Plan distribution

Free64%Pro24%Team9%Enterprise3%

Donut

Pass centerLabel to drop a total (or anything) in the hole.

Infra spend

$4.2k

Compute44%Storage15%LLM API33%Other8%

Radar

Feature adoption — okf vs. last quarter

This quarterLast quarter

Code diff

Additions in stone, removals in red — no green anywhere.

route.ts

export async function POST(req: Request) {

const body = await req.json();

- return Response.json(body);

+ const result = await handle(body);

+ return Response.json(result, { status: 200 });

}

Flow diagram

Nodes reveal in sequence, then a pulse loops along the chain.

request lifecycle

Clientfetch()

Edgemiddleware

Handler/api/chat

LLMstream

HTTP exchange

HTTP

POST/api/chat

{
  "message": "hello"
}

←200OK

{
  "reply": "hi there",
  "tokens": 42
}

Callouts

Note

These mockups are decorative — they render their full content for SEO even while the animation plays.

Reusable

Drop any of these into any .mdx post. They're all in components/synthetic.

Warning

Animations only fire once, when scrolled into view.

Heads up

Remember to register new posts in lib/blog/registry.ts.

Tabs

npm install okf

Keys

Open the palette with Cmd+K or search with Ctrl+/.