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Jcode

Consumer · YC Summer 2026

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Automated design study · full homepage

Light, center-aligned stacked product story with soft geometry and image-led proof.

jcode - open-source AI coding agent for the terminal opens with “jcode” in a center-aligned stacked hero.
Evidence & method · 2 capture notes
Source
https://jcode.sh/
Captured
2026-09-08
Extractor
2.5.0
Evidence
hero, middle, closing, mobile
  • Automated interpretation; editorial review is pending.
  • Section-sequence extraction was bounded to 18 unique headings and 24 qualified regions from 29 unique headings across 35 raw groups and 8 qualified regions across 10 roots.
  • The hero heading was read from semantic heading markup.
  • 6 responsive breakpoint declarations were inspectable.
  • 3 stylesheets were inspectable; 0 cross-origin stylesheets were unavailable to rule inspection.
  • Computed styles describe the captured render; source design tokens and proprietary font files were not copied.

Captured screens

2026-09-08 · source viewport 1600 × 1000

Jcode hero homepage design evidence. Visible section: jcode
Hero1600 × 1000
Jcode mid-page homepage design evidence. Mid-page viewport evidence
Mid-page1600 × 1000
Jcode closing homepage design evidence. Visible section: v0.81.7 · v0.81.6
Closing1600 × 1000
Jcode mobile homepage design evidence. Visible section: jcode
Mobile390 × 844

System overview

Hero
stacked · center
Surface
light
Density
sparse
Content width
816px
Confidence
low
Primary action
None detected

Color system

Light surfaces use 7 repeated semantic colors; hierarchy is carried mainly by tonal contrast.

Canvas

Page canvas

Dominant rendered page background.
Surface 1

Surface

Repeated container or section fill; relative occurrence score 267.
Surface 2

Surface

Repeated container or section fill; relative occurrence score 170.
Surface 3

Surface

Repeated container or section fill; relative occurrence score 8.
Primary text

Primary text

Observed display foreground with 18.9:1 contrast against the captured canvas.
Secondary text

Secondary text

Observed reading foreground; measured canvas-reference contrast is 5.7:1.
Border

Border and divider

Most repeated inspectable border color.

Typography

A single-family system uses JetBrains Mono across display and reading roles, differentiated by size and weight.

Metric previews use the observed CSS values. Source font files are not bundled, so unavailable families fall back locally.
display

jcode

JetBrains Mono · 40px/66px · weight 700 · tracking -0.8px · color rgb(17, 17, 17)
heading

Mission

JetBrains Mono · 24px/32.4px · weight 700 · tracking -0.24px · color rgb(17, 17, 17)
body

jcode bench v1 provides three tasks that follow this spec: float-print, json-unescape, and…

JetBrains Mono · 16px/26.4px · weight 400 · tracking 0px · color rgb(17, 17, 17)
body-small

Measured July 11, 2026 with o200k_base. Tool schemas, repository instructions, skills, memory,…

JetBrains Mono · 13.12px/21.648px · weight 400 · tracking 0px · color rgb(102, 102, 102)
label

Revision history

JetBrains Mono · 10.88px/16.32px · weight 400 · tracking 0px · color rgb(17, 17, 17)

Spacing & shape

Spacing

Base unit
4px
Section gap
Not reliably detected
Container
16px
9px16px8px5.5px4.5px24px10.5px12px13px20px

Shape

Soft geometry is the dominant shape voice. Elevation is selectively reinforced with shadow.

Pills
5px
Containers
4px
Media
0px
Cards
0px
Buttons
0px
Inspect borders & shadows · 3
Borders
1px solid rgb(204, 204, 204)1px solid rgb(17, 17, 17)
Shadows
rgba(0, 0, 0, 0.08) 0px 2px 12px 0px

Component grammar

Token-based examples, not original components. Source fonts may fall back locally.

Hero

Opening proposition

1 observed

Stacked, center-aligned opening anchored by the primary message.

Inspect 4 properties
Pattern
stacked
Alignment
center
Heading
JetBrains Mono · 40px / 700
Media
image-led

Content card

Repeated content module

20 observed

20 style-matched content card instances were found among 34 candidates; properties describe the dominant observed cluster.

Example content
Inspect 6 properties
Text
#111111
Border
none
Radius
0px
Padding
0px 0px 0px 0px
Type
JetBrains Mono · 16px / 400
Candidate pool
34

Badge or tag

Compact status or category label

21 observed

21 style-matched badge or tag instances were found among 23 candidates; properties describe the dominant observed cluster.

Example label
Inspect 6 properties
Text
#666666
Border
1px solid rgb(204, 204, 204)
Radius
4px
Padding
0px 4.48px 0px 4.48px
Type
JetBrains Mono · 11.2px / 400
Candidate pool
23

Media frame

Visual proof

11 observed

11 style-matched media elements were found among 26 rendered candidates; fill fitting and 0px are the most repeated treatments.

Inspect 4 properties
Fit
fill, cover, contain
Ratios
0.82, 1.00, 1.60, 1.63, 1.50
Radius
0px
Candidate pool
26

Footer

Closing navigation

1 observed

9 visible actions close the page on a transparent surface.

Inspect 6 properties
Text
#666666
Border
1px solid rgb(204, 204, 204)
Radius
0px
Padding
32px 0px 0px 0px
Type
JetBrains Mono · 13.6px / 400
Links
9

Layout & narrative

The homepage continues through 20 observed sections, moving from the opening proposition into Mission, Resource efficiency, Intelligence.

Structure
Long-form product catalogue
Hero pattern
Stacked hero: message leads into visual proof within the opening
Grid
1 column
Closing
Index footer with 9 actions
Full section sequence · 20
  1. Mission
  2. Resource efficiency
  3. Intelligence
  4. Optimizations
  5. Screenshots
  6. A good built in memory system.
  7. Open source and customizability
  8. Changelog
  9. Memory per additional session
  10. Memory per additional session, all tools
  11. Intelligence optimization task
  12. Time to first input
  13. Time to first frame
  14. Confidence stepping
  15. Hill-climbable goals
  16. How hill-climbable did the model think the work was?
  17. Auto-poke
  18. Append-only context engineering keeps the model's KV cache hot turn after turn.
  19. v0.81.7
  20. v0.81.6

Imagery, motion & responsive

Imagery

Image led media acts as the page’s primary visual proof rather than decoration.

fill fitting · square-edged frames
Inspect imagery inventory
Composition
Multiple visual elements share the first viewport.
Inventory
23 images/canvas elements and 3 videos across the analyzed homepage.

Motion

0 declared keyframes and 0 active animations were inspectable at capture; observed timing uses 0.25s, 0.01ms.

Reduced-motion rules detected
Inspect motion inventory
Libraries
CSS / browser-native or bundled source not identifiable
Keyframes
None identified
Durations
0.25s, 0.01ms
Easings
ease, ease, ease
States
hover, focus

Mobile

The same 0 visible navigation actions remain at mobile width. Hero remains center-aligned; mobile heading size is 32px.

2 multi-column content regions remain on mobile.
Inspect responsive test
Viewport
390 × 844
Overflow
No horizontal overflow detected

Reproduction guidance

Do

  • Pair the observed #ffffff canvas with #111111 primary copy before adding secondary surfaces.
  • Use JetBrains Mono at 40px/66px, weight 700, for the primary display moment.
  • Let the center-aligned stacked hero establish hierarchy before secondary content.
  • Image led media acts as the page’s primary visual proof rather than decoration.

Don’t

  • Do not mix in arbitrary radii; 5px is the repeated treatment on pills.
  • Do not introduce an accent hue that is absent from the captured palette.
  • Do not introduce extra type families beyond JetBrains Mono.
  • Do not spread the observed shadow treatment across every container; keep elevation selective.