[ core ] Preview BP7 design-token structure

[ryannono]

Summary

Preview of the shape design tokens will take in BP7.

Caveats

• No color value here is accurate. Will FLUP with the full BP7 spec replacing colors as a whole.
• Palette is not restructured in this diff. Palette tokens will also change structure in BP7 - that work is separate.

Decisions

• Intent flattened - states removed. intent.{name} is now a single value; the rest/hover/active/disabled axis lived on intent purely as a convenience for consumers. Pushing state derivation to the consumers (surface) keeps intent simple (one color per role) and lets each surface compute its own state shifts via com.blueprint.derive extensions.
• Layer opacity tiered by audience and state. surface.layer-opacity now splits {app, intent}.{rest, hover, active} so the canvas-level layer and intent-tinted layers can evolve their interaction alphas independently -including the BP6 inversion where dark mode peaks at hover and falls back at active.
• New surface.border-color (per-intent) vs renamed divider-color. Borders take an intent and read at full strength. Dividers are decorative low-alpha rules - they get one neutral with two emphasis levels.
• New surface.background-color.app and surface.layer.app / layer-color.app.

[changelog-app]

Generate changelog in packages/core/changelog/@unreleased

Type (Select exactly one)

• Feature (Adding new functionality)
• Improvement (Improving existing functionality)
• Fix (Fixing an issue with existing functionality)
• Break (Creating a new major version by breaking public APIs)
• Deprecation (Removing functionality in a non-breaking way)
• Migration (Automatically moving data/functionality to a new system)

Description

[ core ] Preview BP7 design-token structure

Check the box to generate changelog(s)

• Generate changelog entry

[blueprint-previews]

Preview BP7 token structure changes

Build artifact links for this commit: documentation | landing | table | demo | storybook

This is an automated comment from the deploy-preview CircleCI job.