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delta

v0.3.8

Released 17 October 2026

All releases

New features

  • Pages built with Delta now show their content in the REST API and RSS feeds, so headless sites and feed readers no longer get a blank page
  • A Site Health check warns you if your server lets anyone download Delta's snapshot and export files
  • Onboarding asks which design system a new site will use before any page is built
  • Your agent has a ready map for moving a site to Automatic.css, and asks whether to keep your current look
  • Your agent sees which Automatic.css settings are still empty, and fills them before a switch
  • Your agent can filter design variables by name and by stylesheet

Improvements

  • Snapshots, restores, imports and exports keep running in the background, and carry on by themselves if a request stops
  • You can cancel an import while it runs
  • Switching entries in the Editor is smoother: the list stays in place and the editor shows a loader
  • Coming Soon still hides your content, but forms and webhooks now work while it is on
  • A switch to another design system cleans up dark mode and contrast values nothing uses. The snapshot keeps them
  • The switch preview lists every name that needs a new name
  • Header and footer content now lines up with page content in Delta's default templates
  • Pages use a clean sans-serif font when the design system sets none
  • Page excerpts read better: words stay apart and placeholders are left out
  • The Map shows all abilities as one node
  • For developers: new filters 21press_delta_coming_soon_rest_gated, 21press_delta_snapshot_tick_budget and 21press_delta_ie_tick_budget. Integrations list which of their abilities only read

Fixes

  • Line breaks in text fields are kept when your agent creates or updates an entry
  • Cancelling a snapshot no longer gets lost while a step runs
  • Delta's own stylesheets no longer go missing from the variable list
  • Export, import and restore keep a page's title and password as they were
  • Security: snapshot and export folders get names no one can guess, and Apache and LiteSpeed block downloads from them
  • Security: a read-only agent token runs another plugin's ability only when Delta knows it only reads
  • Security: Meta Box abilities that could show drafts and passwords are no longer offered to agents