Add the first-party Chart JSON interchange

[tannerlinsley]

Summary

• add @tanstack/charts/json with a closed, versioned envelope, 16 fixed operations, synchronous chartFromJson(), structured errors, host data overrides, and exact-version checks
• publish the matching JSON Schema and bundled example, with packed-package and release-contract coverage
• document AI authoring and add a responsive /json/ workbench for bar, donut, annotations, validation errors, and data replacement
• replace the abandoned portable registry proposal with the bounded first-party interchange

Verification

• pnpm exec vitest run — 286 files, 1,912 tests
• pnpm exec tsc --noEmit --incremental false
• node scripts/check-docs.mjs
• pnpm --filter @charts-poc/conformance-example build
• node scripts/catalog-preview.mjs --check — 188 previews
• node scripts/compare-chart-libraries.mjs --check
• node scripts/check-release-packages.mjs
• desktop and 390px Chromium workbench audit

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit bd03eca

Command	Status	Duration	Result
nx run charts-workspace:ci-distributed	✅ Succeeded	5m 2s	View ↗
nx run charts-workspace:package-check	✅ Succeeded	2m 11s	View ↗
nx run charts-workspace:benchmark-check	✅ Succeeded	1m 3s	View ↗

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☁️ Nx Cloud last updated this comment at 2026-08-20 22:58:10 UTC