feat(design-data): excludeFromLegacy token field + button corner-radius fix

[GarthDB]

Description

Adds an excludeFromLegacy boolean token field: when true, the token is
skipped during legacy-output generation (packages/tokens/src) instead of
being written there. This lets new tokens without Tokens Studio precedent be
authored directly in packages/design-data without polluting the legacy
mirror.

Uses the new flag to add real button corner-radius tokens
(small/medium/large/extra-large, desktop+mobile) with literal pixel values
derived from component-height-* ÷ 2 — replacing the previously-dangling,
calculated-only bindings in button.json. Also fixes the binding key order
mismatch (corner-radius-button-* → button-corner-radius-*) that was
causing SPEC-027 warnings.

Related Issue

bead spectrum-design-data-vpk.1 (SPEC-027 dangling tokenBindings
triage).

Motivation and Context

button.json's three corner-radius bindings referenced literal strings with
no matching token anywhere in the corpus (corner-radius-button-small etc.)
— these were purely calculated (height ÷ 2) design values with no design-data
representation. Rather than requiring Tokens Studio to publish first, this
adds a general mechanism for authoring net-new structured tokens directly in
design-data, opting them out of the legacy mirror until/unless Tokens
Studio catches up.

How Has This Been Tested?

• cargo test -p design-data-core legacy:: — all tests pass, including a
  new unit test for excludeFromLegacy.
• Built the CLI and ran migrate legacy-output against
  packages/design-data/tokens; diffed the generated layout.json against
  the currently committed packages/tokens/src/layout.json — byte-identical
  (confirms zero legacy-output impact from the new tokens).
• moon run sdk:codegen + moon run design-data:validate — clean, no more
  SPEC-027 warnings for button.json's corner-radius bindings (remaining
  warnings are pre-existing, unrelated vpk.1 items).
• node tools/changeset-linter/src/cli.js check --fail-on-warnings — passes.

Screenshots (if appropriate):

N/A

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[changeset-bot]

🦋 Changeset detected

Latest commit: 9da8be3

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 10 packages

Name	Type
@adobe/spectrum-design-data	Minor
@adobe/spectrum-component-api-schemas	Patch
@adobe/design-system-registry	Patch
@adobe/design-data-agent-mcp	Patch
@adobe/design-data-mcp	Patch
markdown-generator	Patch
@adobe/token-corpus-migrate	Patch
@adobe/token-naming-audit	Patch
component-options-editor	Patch
@adobe/spectrum-design-data-mcp	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

🎨 Token Changes Report

Tokens Changed (0)

Original Branch: main
New Branch: feat/button-corner-radius-exclude-from-legacy

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This comment was automatically generated by the token diff tool. 🤖

[github-actions]

Run report for 9da8be37

Total time: 3m 4s | Comparison time: 5m 46s | Estimated savings: 2m 41s (46.7% faster)

	Action	Time	Status	Info
⬛️	SetupProto(0.57.4)	0ms	Skipped
🟩	SyncWorkspace	9ms	Passed
🟩	SyncProject(sdk)	11.3ms	Passed
🟩	SyncProject(design-data-spec)	11.3ms	Passed
🟩	SyncProject(design-data)	1.3ms	Passed
⬛️	SetupToolchain(node:20.17.0)	23.6ms	Skipped
⬛️	SetupToolchain(pnpm:10.17.1)	2ms	Skipped
⬛️	SetupToolchain(javascript)	0ms	Skipped
🟩	SetupEnvironment(javascript)	0.5ms	Passed
⬛️	SetupEnvironment(javascript, sdk)	0.6ms	Skipped
⬛️	InstallDependencies(javascript)	0.3ms	Skipped
🟩	RunTask(design-data:validate-registry)	194.3ms	Passed
⬛️	SetupToolchain(rust:1.88.0)	309.8ms	Skipped
🟩	SetupEnvironment(rust, sdk)	203.6ms	Passed
⬛️	InstallDependencies(rust, sdk)	8.4ms	Skipped
🟩	RunTask(sdk:fmt-check)	1.4s	Passed
🟩	InstallDependencies(javascript, sdk)	5.1s	Passed
🟩	RunTask(sdk:codegen-check)	185.3ms	Passed
🟩	RunTask(sdk:lint)	47.7s	Passed
🟩	RunTask(sdk:test)	2m 51s	Passed	SLOW
	And 5 more...

Expanded report

	Action	Time	Status	Info
🟩	RunTask(sdk:build)	2m 56s	Passed	SLOW
🟩	RunTask(design-data:legacy-output)	555.2ms	Passed
🟩	RunTask(design-data:roundtrip-verify)	888.3ms	Passed
🟩	RunTask(design-data:validate-dataset)	2.2s	Passed
🟩	RunTask(design-data:validate)	1s	Passed

Changed files

.changeset/button-corner-radius-exclude-from-legacy.md
.changeset/vpk1-fix-workflow-icon-400-gap.md
packages/design-data-spec/schemas/token.schema.json
packages/design-data/components/button.json
packages/design-data/components/combo-box.json
packages/design-data/components/number-field.json
packages/design-data/components/text-area.json
packages/design-data/components/text-field.json
packages/design-data/tokens/layout.tokens.json
sdk/core/src/legacy.rs

[github-actions]

🧩 Component Schema Changes Report

Component Schemas Changed (0 added, 0 deleted, 5 updated)

Original Branch: main

New Branch: feat/button-corner-radius-exclude-from-legacy

✅ No Breaking Changes

This PR contains only non-breaking changes to component schemas.

🔄 Non-Breaking Updates

button

combo-box

number-field

text-area

text-field

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This diff was generated automatically and contains only backward-compatible changes.

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This comment was automatically generated by the component schema diff tool. 🤖