Adopt Fallow as a PR quality gate

.fallowrc.json

@@ -0,0 +1,59 @@
+{
+  "$schema": "https://raw.githubusercontent.com/fallow-rs/fallow/main/schema.json",
+  "entry": [
+    "fixtures/react-compat/rsbuild.config.mjs",
+    "storybook/stories/**/*.mdx"
+  ],
+  "ignoreDependencies": [
+    "@rsbuild/core",
+    "@rsbuild/plugin-react",
+    "@size-limit/preset-small-lib"
+  ],
+  "ignoreUnresolvedImports": [
+    "storybook/actions",
+    "storybook/manager-api",
+    "storybook/theming"
+  ],
+  "rules": {
+    "unused-files": "error",
+    "unused-exports": "error",
+    "unused-dependencies": "error",
+    "unused-dev-dependencies": "error",
+    "dev-dependencies-in-production": "error",
+    "unresolved-imports": "error",
+    "unlisted-dependencies": "error",
+    "circular-dependencies": "error",
+    "stale-suppressions": "error"
+  },
+  "duplicates": {
+    "minOccurrences": 2
+  },
+  "health": {
+    "maxCyclomatic": 20,
+    "maxCognitive": 15,
+    "maxCrap": 30,
+    "maxUnitSize": 60,
+    "coverage": "coverage/coverage-final.json",
+    "thresholdOverrides": [
+      {
+        "files": ["storybook/stories/elements.tsx"],
+        "functions": ["EntryDetails", "ScrollWrapper"],
+        "maxCrap": 31,
+        "reason": "Interactive Storybook demos are intentionally excluded from unit coverage; retain the default structural complexity limits while allowing these two estimated CRAP scores."
+      },
+      {
+        "files": ["storybook/stories/useInView.story.tsx"],
+        "functions": ["HooksRender"],
+        "maxCrap": 43,
+        "reason": "This interactive Storybook demo is intentionally excluded from unit coverage; retain the default structural complexity limits while allowing its estimated CRAP score."
+      },
+      {
+        "files": ["storybook/stories/useOnInView.story.tsx"],
+        "functions": ["UseOnInViewRender"],
+        "maxCrap": 57,
+        "reason": "This interactive Storybook demo is intentionally excluded from unit coverage; retain the default structural complexity limits while allowing its measured CRAP score of 56."
+      }
+    ],
+    "suggestInlineSuppression": false
+  }
+}

.github/workflows/test.yml

@@ -12,6 +12,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v7
+        with:
+          fetch-depth: 0
       - run: corepack enable
       - name: Setup Node.js
         uses: actions/setup-node@v6
@@ -28,6 +30,9 @@ jobs:
         run: pnpm vitest --coverage
         env:
           CI: true
+      - name: Fallow audit
+        if: github.event_name == 'pull_request'
+        run: pnpm fallow audit --base "origin/${{ github.base_ref }}"
       - name: Build
         run: pnpm build
 

.gitignore

@@ -20,3 +20,4 @@ storybook-static
 test-utils.js
 test-utils.d.ts
 __screenshots__
+.fallow/

package.json

@@ -135,8 +135,8 @@
     "@vitest/browser-playwright": "^4.0.16",
     "@vitest/coverage-istanbul": "^4.0.16",
     "bumpp": "^10.3.2",
+    "fallow": "3.10.0",
     "lint-staged": "^16.2.7",
-    "microbundle": "^0.15.1",
     "npm-run-all": "^4.1.5",
     "playwright": "^1.57.0",
     "publint": "^0.3.16",