chore: kanban template

packages/mantine-theme/active.json

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+{
+  "id": "default"
+}

packages/mantine-theme/base.json

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+{
+  "fontFamily": "IBM Plex Sans, sans-serif",
+  "headings": {
+    "fontFamily": "IBM Plex Sans, sans-serif"
+  }
+}

packages/mantine-theme/index.ts

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+import { createTheme, type MantineThemeOverride } from '@mantine/core'
+import { generateColors } from '@mantine/colors-generator'
+import base from './base.json'
+import active from './active.json'
+import { palettes } from './palettes'
+
+export type Palette = {
+  name: string
+  description?: string
+  primaryColor?: string
+  bases?: Record<string, string>
+}
+
+// Each palette extends the shared base (fonts, radius, component defaults) and
+// auto-expands its `bases` hexes into full 10-shade Mantine scales, so a palette
+// only declares one colour per semantic role.
+export const buildTheme = (palette: Palette): MantineThemeOverride => {
+  const colors = Object.fromEntries(
+    Object.entries(palette.bases ?? {}).map(([role, hex]) => [role, generateColors(hex)]),
+  )
+  return createTheme({
+    ...(base as MantineThemeOverride),
+    ...(palette.primaryColor ? { primaryColor: palette.primaryColor } : {}),
+    ...(Object.keys(colors).length ? { colors } : {}),
+  })
+}
+
+export const themes: Record<string, MantineThemeOverride> = Object.fromEntries(
+  Object.entries(palettes).map(([id, palette]) => [id, buildTheme(palette as Palette)]),
+)
+
+export { palettes }
+export const activeId = active.id
+export const activeTheme: MantineThemeOverride = themes[active.id] ?? themes.default
+
+// Back-compat: existing imports of `theme` resolve to the active palette.
+export const theme = activeTheme

packages/mantine-theme/package.json

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+{
+  "name": "@project/mantine-themes",
+  "version": "0.0.1",
+  "private": true,
+  "type": "module",
+  "exports": {
+    ".": "./index.ts",
+    "./base.json": "./base.json",
+    "./active.json": "./active.json"
+  },
+  "scripts": {
+    "tsc": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@mantine/colors-generator": "^8.3.8",
+    "chroma-js": "^3.1.2"
+  },
+  "devDependencies": {
+    "@mantine/core": "^8.3.8",
+    "typescript": "^5.9"
+  },
+  "peerDependencies": {
+    "@mantine/core": "^8.3.8"
+  }
+}

packages/mantine-theme/palettes/default.json

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+{
+  "name": "Default",
+  "primaryColor": "blue"
+}

packages/mantine-theme/palettes/index.ts

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+// Generated by the fabric-theme tool — do not edit by hand.
+// Lists every palette JSON in this directory. Add palettes via the theme tool.
+import p_default from './default.json'
+
+export const palettes: Record<string, unknown> = {
+  default: p_default,
+}

packages/mantine-theme/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "resolveJsonModule": true,
+    "noEmit": true,
+    "types": []
+  },
+  "include": ["index.ts", "base.json", "active.json", "palettes/**/*.ts", "palettes/**/*.json"]
+}