Files
clawfort/openspec/changes/archive/2026-02-13-p06-theming/proposal.md

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Why

The current UI is locked to dark presentation, which does not match all user preferences or accessibility needs. Adding multi-theme support now improves usability and lets returning users keep a consistent visual experience.

What Changes

  • Add a theme switcher in the top-right header area.
  • Support four theme modes: system, light, dark, and high-contrast.
  • Render theme options as icons (not text-only controls).
  • Persist selected theme in client storage with localStorage as primary and cookie fallback.
  • Restore persisted theme for returning users.
  • Use system as default when no prior selection exists.

Capabilities

New Capabilities

  • theme-switcher-control: Provide an icon-based theme switcher in the header with system/light/dark/high-contrast options.
  • theme-preference-persistence: Persist and restore user-selected theme using localStorage first, with cookie fallback.
  • theme-default-system: Apply system theme automatically when no saved preference exists.

Modified Capabilities

  • None.

Impact

  • Frontend/UI: Header controls and global styling system updated for four theme modes.
  • State management: Client-side preference state handling added for theme selection and restoration.
  • Accessibility: High-contrast option improves readability for users needing stronger contrast.
  • APIs/Backend: No required backend API changes expected.