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James Koster

Designer at Automattic

@jameskoster UK joined Aug 2009

jameskoster.design github.com/jameskoster Slack: @jameskoster
    Teams Design

    Bio

    Designer @ Automattic.

    Interests

    Horticulture, Espresso, Exercise, Art, Tech, Pizza

    WordPress Origin Story

    Discovered WordPress when building Quake III: Arena clan websites for friends back in the noughties.

    Badges

    CODE
    5 badges
    C Core AI Contributor '26 Core Contributor '19 Core Team '23 Plugin Developer Theme Developer

    Current Job

    Designer
    Present
    Automattic

    Recent impact

    Score weights high-impact work (commits, releases, approved translations, props) at 3x routine activity.

    Last 30 days
    7contributions
    high1
    medium6
    score9
    Last 90 days
    8contributions
    high2
    medium6
    score12
    Last 12 months
    228contributions
    high59
    medium169
    score346

    Team focus

    Across 1 team, with no team-attributable contributions in the last 365 days

    WordPress releases

    Contributed to 19 releases
    • 7.1
    • 7.0
    • 6.9
    • 6.8
    • 6.7
    • 6.6
    • 6.5
    • 6.4
    • 6.3
    • 6.2
    • 6.1
    • 6.0
    • 5.9
    • 5.8
    • 5.7
    • 5.6
    • 5.5
    • 5.4
    • 5.3

    Time commitment

    10 hours per week of sponsored contribution time

    Contributions

    Type
    October 2026
    Oct 02 Fri · 11:05
    Core high
    Merged pull request #83993 into WordPress/gutenberg:
    Menu: Align group labels and separators with indented item labels.
    Oct 01 Thu · 14:50
    Core med
    Submitted pull request #83993 to WordPress/gutenberg:
    Menu: Align group labels and separators with indented item labels.
    September 2026
    Sep 28 Mon · 13:30
    Core med
    Closed issue #65801 on the WordPress/gutenberg repository:
    New component: ListboxControl
    Sep 28 Mon · 09:41
    Core med
    Closed issue #60175 on the WordPress/gutenberg repository:
    Add template modal dialog: labeling of some TemplateListItems is far from ideal
    Sep 28 Mon · 09:39
    Core med
    Closed issue #60172 on the WordPress/gutenberg repository:
    Editor Navigation panel: Focus loss when the Actions ellipsis button is removed…
    Sep 24 Thu · 08:23
    Core med
    Created issue #83482 in the WordPress/gutenberg repository:
    Theme: Checkboxes become fully rounded when using corner radius > `subtle`
    Sep 21 Mon · 17:06
    Core med
    Closed issue #38321 on the WordPress/gutenberg repository:
    Comment Author Avatar: Consider making it possible to manipulate `avatar_default`
    August 2026
    Aug 26 Wed · 13:29
    Core high
    Mentioned in [63349] on WordPress SVN:
    Editor: Append the post slug to single post template titles when posts share the same title.
    June 2026
    Jun 12 Fri · 14:12
    Core med
    Created issue #79154 in the WordPress/gutenberg repository:
    Design System: Add a dedicated Navigation component
    Jun 12 Fri · 13:56
    Core high
    Merged pull request #78816 into WordPress/gutenberg:
    Add corner radius presets to ThemeProvider

    Developer

    9 plugins

    Contributor

    3 plugins

    Themes

    2 themes

    Plugins

    2 favorites

    Themes

    1 favorite