diff --git a/examples/kitchen-sink-of-fsd-issues/reference-output-ubuntu-latest.json b/examples/kitchen-sink-of-fsd-issues/reference-output-ubuntu-latest.json
deleted file mode 100644
index 53d8ef16..00000000
--- a/examples/kitchen-sink-of-fsd-issues/reference-output-ubuntu-latest.json
+++ /dev/null
@@ -1,73 +0,0 @@
-[
-  {
-    "message": "Forbidden import from higher layer \"app\".",
-    "location": {
-      "path": "/home/runner/work/steiger/steiger/examples/kitchen-sink-of-fsd-issues/src/entities/user/api/getUser.ts"
-    },
-    "ruleName": "fsd/forbidden-imports",
-    "severity": "error"
-  },
-  {
-    "message": "Inconsistent pluralization of slice names. Prefer all plural names",
-    "fixes": [
-      {
-        "type": "rename",
-        "path": "/home/runner/work/steiger/steiger/examples/kitchen-sink-of-fsd-issues/src/entities/user",
-        "newName": "users"
-      }
-    ],
-    "location": {
-      "path": "/home/runner/work/steiger/steiger/examples/kitchen-sink-of-fsd-issues/src/entities"
-    },
-    "ruleName": "fsd/inconsistent-naming",
-    "severity": "error"
-  },
-  {
-    "message": "This slice has no references. Consider removing it.",
-    "location": {
-      "path": "/home/runner/work/steiger/steiger/examples/kitchen-sink-of-fsd-issues/src/entities/users"
-    },
-    "ruleName": "fsd/insignificant-slice",
-    "severity": "error"
-  },
-  {
-    "message": "This slice has no references. Consider removing it.",
-    "location": {
-      "path": "/home/runner/work/steiger/steiger/examples/kitchen-sink-of-fsd-issues/src/entities/user"
-    },
-    "ruleName": "fsd/insignificant-slice",
-    "severity": "error"
-  },
-  {
-    "message": "Forbidden sidestep of public API when importing from \"@/app/ui/App\".",
-    "location": {
-      "path": "/home/runner/work/steiger/steiger/examples/kitchen-sink-of-fsd-issues/src/entities/user/api/getUser.ts"
-    },
-    "ruleName": "fsd/no-public-api-sidestep",
-    "severity": "error"
-  },
-  {
-    "message": "Having a folder with the name \"api\" inside a segment could be confusing because that name is commonly used for segments. Consider renaming it.",
-    "location": {
-      "path": "/home/runner/work/steiger/steiger/examples/kitchen-sink-of-fsd-issues/src/entities/user/ui/api"
-    },
-    "ruleName": "fsd/no-reserved-folder-names",
-    "severity": "error"
-  },
-  {
-    "message": "Layer \"app\" should not have \"ui\" segment.",
-    "location": {
-      "path": "/home/runner/work/steiger/steiger/examples/kitchen-sink-of-fsd-issues/src/app/ui"
-    },
-    "ruleName": "fsd/no-ui-in-app",
-    "severity": "error"
-  },
-  {
-    "message": "Layer \"processes\" is deprecated, avoid using it",
-    "location": {
-      "path": "/home/runner/work/steiger/steiger/examples/kitchen-sink-of-fsd-issues/src/processes"
-    },
-    "ruleName": "fsd/no-processes",
-    "severity": "error"
-  }
-]
diff --git a/integration-tests/eslint.config.mjs b/integration-tests/eslint.config.mjs
new file mode 100644
index 00000000..0cab0553
--- /dev/null
+++ b/integration-tests/eslint.config.mjs
@@ -0,0 +1 @@
+export { default } from '@steiger/eslint-config'
diff --git a/integration-tests/package.json b/integration-tests/package.json
new file mode 100644
index 00000000..9bd10227
--- /dev/null
+++ b/integration-tests/package.json
@@ -0,0 +1,42 @@
+{
+  "private": true,
+  "name": "@steiger/integration-tests",
+  "description": "Integration tests for Steiger",
+  "version": "0.1.0",
+  "scripts": {
+    "test": "vitest run",
+    "update-windows-snapshots": "node ./scripts/update-windows-snapshots.mjs"
+  },
+  "exports": {
+    ".": "./src/index.ts"
+  },
+  "type": "module",
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "Anton Medvedev",
+      "email": "unordinarity@yandex.ru",
+      "url": "https://github.com/unordinarity"
+    },
+    {
+      "name": "Lev Chelyadinov",
+      "email": "leva181777@gmail.com",
+      "url": "https://github.com/illright"
+    }
+  ],
+  "devDependencies": {
+    "@steiger/eslint-config": "workspace:*",
+    "@steiger/tsconfig": "workspace:*",
+    "@total-typescript/ts-reset": "^0.6.1",
+    "@types/node": "^18.11.9",
+    "eslint": "^9.16.0",
+    "get-bin-path": "^11.0.0",
+    "prettier": "^3.4.2",
+    "tinyexec": "^0.3.1",
+    "typescript": "^5.7.2",
+    "vitest": "^2.1.8"
+  },
+  "dependencies": {
+    "steiger": "workspace:*"
+  }
+}
diff --git a/integration-tests/reset.d.ts b/integration-tests/reset.d.ts
new file mode 100644
index 00000000..e3f32cd1
--- /dev/null
+++ b/integration-tests/reset.d.ts
@@ -0,0 +1,2 @@
+// Do not add any other lines of code to this file!
+import '@total-typescript/ts-reset'
diff --git a/integration-tests/scripts/update-windows-snapshots.mjs b/integration-tests/scripts/update-windows-snapshots.mjs
new file mode 100644
index 00000000..4b151296
--- /dev/null
+++ b/integration-tests/scripts/update-windows-snapshots.mjs
@@ -0,0 +1,14 @@
+import * as fs from 'node:fs/promises'
+import { dirname, join } from 'node:path'
+import { fileURLToPath } from 'node:url'
+
+const snapshotsFolder = join(dirname(fileURLToPath(import.meta.url)), '../tests/__snapshots__')
+
+// Go through each POSIX snapshot and replace the forward slashes in diagnostic paths with backslashes
+for (const file of await fs.readdir(snapshotsFolder)) {
+  if (file.endsWith('-posix.txt')) {
+    const windowsSnapshotName = file.slice(0, -'-posix.txt'.length) + '-windows.txt'
+    const updatedSnapshot = (await fs.readFile(join(snapshotsFolder, file), 'utf8')).replace(/(?<=┌.+)\//gm, '\\')
+    await fs.writeFile(join(snapshotsFolder, windowsSnapshotName), updatedSnapshot)
+  }
+}
diff --git a/integration-tests/tests/__snapshots__/smoke-stderr-posix.txt b/integration-tests/tests/__snapshots__/smoke-stderr-posix.txt
new file mode 100644
index 00000000..01ebdfbc
--- /dev/null
+++ b/integration-tests/tests/__snapshots__/smoke-stderr-posix.txt
@@ -0,0 +1,45 @@
+
+┌ src/entities/user/api/getUser.ts
+✘ Forbidden import from higher layer "app".
+│
+└ fsd/forbidden-imports (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/forbidden-imports​)
+
+┌ src/entities
+✘ Inconsistent pluralization of slice names. Prefer all plural names
+✔ Auto-fixable
+│
+└ fsd/inconsistent-naming (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/inconsistent-naming​)
+
+┌ src/entities/user
+✘ This slice has no references. Consider removing it.
+│
+└ fsd/insignificant-slice (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/insignificant-slice​)
+
+┌ src/entities/users
+✘ This slice has no references. Consider removing it.
+│
+└ fsd/insignificant-slice (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/insignificant-slice​)
+
+┌ src/entities/user/api/getUser.ts
+✘ Forbidden sidestep of public API when importing from "@/app/ui/App".
+│
+└ fsd/no-public-api-sidestep (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/no-public-api-sidestep​)
+
+┌ src/entities/user/ui/api
+✘ Having a folder with the name "api" inside a segment could be confusing because that name is commonly used for segments. Consider renaming it.
+│
+└ fsd/no-reserved-folder-names (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/no-reserved-folder-names​)
+
+┌ src/app/ui
+✘ Layer "app" should not have "ui" segment.
+│
+└ fsd/no-ui-in-app (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/no-ui-in-app​)
+
+┌ src/processes
+✘ Layer "processes" is deprecated, avoid using it
+│
+└ fsd/no-processes (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/no-processes​)
+
+────────────────────────────────────────────────────────
+ Found 8 errors (1 can be fixed automatically with --fix)
+
diff --git a/integration-tests/tests/__snapshots__/smoke-stderr-windows.txt b/integration-tests/tests/__snapshots__/smoke-stderr-windows.txt
new file mode 100644
index 00000000..3f123d62
--- /dev/null
+++ b/integration-tests/tests/__snapshots__/smoke-stderr-windows.txt
@@ -0,0 +1,45 @@
+
+┌ src\entities\user\api\getUser.ts
+✘ Forbidden import from higher layer "app".
+│
+└ fsd/forbidden-imports (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/forbidden-imports​)
+
+┌ src\entities
+✘ Inconsistent pluralization of slice names. Prefer all plural names
+✔ Auto-fixable
+│
+└ fsd/inconsistent-naming (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/inconsistent-naming​)
+
+┌ src\entities\user
+✘ This slice has no references. Consider removing it.
+│
+└ fsd/insignificant-slice (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/insignificant-slice​)
+
+┌ src\entities\users
+✘ This slice has no references. Consider removing it.
+│
+└ fsd/insignificant-slice (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/insignificant-slice​)
+
+┌ src\entities\user\api\getUser.ts
+✘ Forbidden sidestep of public API when importing from "@/app/ui/App".
+│
+└ fsd/no-public-api-sidestep (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/no-public-api-sidestep​)
+
+┌ src\entities\user\ui\api
+✘ Having a folder with the name "api" inside a segment could be confusing because that name is commonly used for segments. Consider renaming it.
+│
+└ fsd/no-reserved-folder-names (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/no-reserved-folder-names​)
+
+┌ src\app\ui
+✘ Layer "app" should not have "ui" segment.
+│
+└ fsd/no-ui-in-app (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/no-ui-in-app​)
+
+┌ src\processes
+✘ Layer "processes" is deprecated, avoid using it
+│
+└ fsd/no-processes (​https://github.com/feature-sliced/steiger/tree/master/packages/steiger-plugin-fsd/src/no-processes​)
+
+────────────────────────────────────────────────────────
+ Found 8 errors (1 can be fixed automatically with --fix)
+
diff --git a/integration-tests/tests/smoke.test.ts b/integration-tests/tests/smoke.test.ts
new file mode 100644
index 00000000..f499a304
--- /dev/null
+++ b/integration-tests/tests/smoke.test.ts
@@ -0,0 +1,24 @@
+import * as fs from 'node:fs/promises'
+import os from 'node:os'
+import { dirname, join } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { exec } from 'tinyexec'
+
+import { expect, test } from 'vitest'
+
+import { getSteigerBinPath } from '../utils/get-bin-path.js'
+
+const temporaryDirectory = await fs.realpath(os.tmpdir())
+const steiger = await getSteigerBinPath()
+const kitchenSinkExample = join(dirname(fileURLToPath(import.meta.url)), '../../examples/kitchen-sink-of-fsd-issues')
+const pathPlatform = os.platform() === 'win32' ? 'windows' : 'posix'
+
+test('basic functionality in the kitchen sink example project', async () => {
+  const project = join(temporaryDirectory, 'smoke')
+  await fs.rm(project, { recursive: true, force: true })
+  await fs.cp(kitchenSinkExample, project, { recursive: true })
+
+  const { stderr } = await exec('node', [steiger, 'src'], { nodeOptions: { cwd: project } })
+
+  await expect(stderr).toMatchFileSnapshot(join('__snapshots__', `smoke-stderr-${pathPlatform}.txt`))
+})
diff --git a/integration-tests/tsconfig.json b/integration-tests/tsconfig.json
new file mode 100644
index 00000000..e2b70993
--- /dev/null
+++ b/integration-tests/tsconfig.json
@@ -0,0 +1,7 @@
+{
+  "extends": "@steiger/tsconfig/base.json",
+  "include": ["./tests", "./reset.d.ts", "utils/get-bin-path.ts"],
+  "compilerOptions": {
+    "tsBuildInfoFile": "node_modules/.cache/tsbuildinfo.json"
+  }
+}
diff --git a/integration-tests/utils/get-bin-path.ts b/integration-tests/utils/get-bin-path.ts
new file mode 100644
index 00000000..871b8894
--- /dev/null
+++ b/integration-tests/utils/get-bin-path.ts
@@ -0,0 +1,22 @@
+import { promises as fs } from 'node:fs'
+import * as process from 'node:process'
+import { dirname, join } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { getBinPath } from 'get-bin-path'
+
+/**
+ * Resolve the full path to the built JS file of the CLI.
+ *
+ * Rejects if the file doesn't exist.
+ */
+export async function getSteigerBinPath() {
+  const steiger = (await getBinPath({ cwd: join(dirname(fileURLToPath(import.meta.url)), '../../packages/steiger') }))!
+  try {
+    await fs.stat(steiger)
+  } catch {
+    console.error('Run `npm run build` before running integration tests')
+    process.exit(1)
+  }
+
+  return steiger
+}
diff --git a/packages/steiger/src/app.ts b/packages/steiger/src/app.ts
index c44a8246..05687d34 100644
--- a/packages/steiger/src/app.ts
+++ b/packages/steiger/src/app.ts
@@ -21,12 +21,7 @@ async function runRules({ vfs, rules }: { vfs: Folder; rules: Array<Rule> }) {
   const vfsWithoutGlobalIgnores = removeGlobalIgnoreFromVfs(vfs, getGlobalIgnores())
 
   const ruleResults = await Promise.all(rules.map((rule) => runRule(vfsWithoutGlobalIgnores, rule)))
-  return ruleResults.flatMap((r, ruleResultsIndex) => {
-    const { diagnostics } = r
-    if (diagnostics.length === 0) {
-      return []
-    }
-
+  return ruleResults.flatMap(({ diagnostics }, ruleResultsIndex) => {
     const ruleName = rules[ruleResultsIndex].name
     const severities = calculateFinalSeverities(
       vfsWithoutGlobalIgnores,
@@ -34,12 +29,14 @@ async function runRules({ vfs, rules }: { vfs: Folder; rules: Array<Rule> }) {
       diagnostics.map((d) => d.location.path),
     )
 
-    return diagnostics.map((d, index) => ({
-      ...d,
-      ruleName,
-      getRuleDescriptionUrl,
-      severity: severities[index],
-    }))
+    return diagnostics
+      .sort((a, b) => a.location.path.localeCompare(b.location.path))
+      .map((d, index) => ({
+        ...d,
+        ruleName,
+        getRuleDescriptionUrl,
+        severity: severities[index],
+      }))
   })
 }
 
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 06f679df..585ba0df 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -33,6 +33,43 @@ importers:
         specifier: ^2.3.3
         version: 2.3.3
 
+  integration-tests:
+    dependencies:
+      steiger:
+        specifier: workspace:*
+        version: link:../packages/steiger
+    devDependencies:
+      '@steiger/eslint-config':
+        specifier: workspace:*
+        version: link:../tooling/eslint-config
+      '@steiger/tsconfig':
+        specifier: workspace:*
+        version: link:../tooling/tsconfig
+      '@total-typescript/ts-reset':
+        specifier: ^0.6.1
+        version: 0.6.1
+      '@types/node':
+        specifier: ^18.11.9
+        version: 18.19.67
+      eslint:
+        specifier: ^9.16.0
+        version: 9.16.0
+      get-bin-path:
+        specifier: ^11.0.0
+        version: 11.0.0
+      prettier:
+        specifier: ^3.4.2
+        version: 3.4.2
+      tinyexec:
+        specifier: ^0.3.1
+        version: 0.3.1
+      typescript:
+        specifier: ^5.7.2
+        version: 5.7.2
+      vitest:
+        specifier: ^2.1.8
+        version: 2.1.8(@types/node@18.19.67)
+
   packages/pretty-reporter:
     dependencies:
       chalk:
@@ -1805,6 +1842,10 @@ packages:
     resolution: {integrity: sha512-hFM7oivtlgJ3d6XWD6G47l8Wyh/C6vFw5G24Kk1Tbq85yh5gcM8Fne5/lFhiuxB+RT6+SI7I1ThB9lG4FBh3jw==}
     engines: {node: '>=18'}
 
+  get-bin-path@11.0.0:
+    resolution: {integrity: sha512-hvX/hynZJ6sxeItamADFBZo0WmLoG/qZBlRCLRv+J+oN8USw1ZxefIGJSFPu1GGd3OHWVFJKvCCN970wmpiHzg==}
+    engines: {node: '>=18.18.0'}
+
   get-caller-file@2.0.5:
     resolution: {integrity: sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==}
     engines: {node: 6.* || 8.* || >= 10.*}
@@ -3742,7 +3783,7 @@ snapshots:
       debug: 4.4.0
       globby: 11.1.0
       is-glob: 4.0.3
-      minimatch: 9.0.4
+      minimatch: 9.0.5
       semver: 7.6.3
       ts-api-utils: 1.3.0(typescript@5.7.2)
     optionalDependencies:
@@ -3792,6 +3833,14 @@ snapshots:
       chai: 5.1.2
       tinyrainbow: 1.2.0
 
+  '@vitest/mocker@2.1.8(vite@5.4.11(@types/node@18.19.67))':
+    dependencies:
+      '@vitest/spy': 2.1.8
+      estree-walker: 3.0.3
+      magic-string: 0.30.15
+    optionalDependencies:
+      vite: 5.4.11(@types/node@18.19.67)
+
   '@vitest/mocker@2.1.8(vite@5.4.11(@types/node@22.10.1))':
     dependencies:
       '@vitest/spy': 2.1.8
@@ -4433,6 +4482,10 @@ snapshots:
       ast-module-types: 6.0.0
       node-source-walk: 7.0.0
 
+  get-bin-path@11.0.0:
+    dependencies:
+      escalade: 3.1.2
+
   get-caller-file@2.0.5: {}
 
   get-east-asian-width@1.3.0: {}
@@ -5362,6 +5415,24 @@ snapshots:
 
   validate-npm-package-name@5.0.1: {}
 
+  vite-node@2.1.8(@types/node@18.19.67):
+    dependencies:
+      cac: 6.7.14
+      debug: 4.4.0
+      es-module-lexer: 1.5.4
+      pathe: 1.1.2
+      vite: 5.4.11(@types/node@18.19.67)
+    transitivePeerDependencies:
+      - '@types/node'
+      - less
+      - lightningcss
+      - sass
+      - sass-embedded
+      - stylus
+      - sugarss
+      - supports-color
+      - terser
+
   vite-node@2.1.8(@types/node@22.10.1):
     dependencies:
       cac: 6.7.14
@@ -5380,6 +5451,15 @@ snapshots:
       - supports-color
       - terser
 
+  vite@5.4.11(@types/node@18.19.67):
+    dependencies:
+      esbuild: 0.21.5
+      postcss: 8.4.49
+      rollup: 4.28.1
+    optionalDependencies:
+      '@types/node': 18.19.67
+      fsevents: 2.3.3
+
   vite@5.4.11(@types/node@22.10.1):
     dependencies:
       esbuild: 0.21.5
@@ -5389,6 +5469,41 @@ snapshots:
       '@types/node': 22.10.1
       fsevents: 2.3.3
 
+  vitest@2.1.8(@types/node@18.19.67):
+    dependencies:
+      '@vitest/expect': 2.1.8
+      '@vitest/mocker': 2.1.8(vite@5.4.11(@types/node@18.19.67))
+      '@vitest/pretty-format': 2.1.8
+      '@vitest/runner': 2.1.8
+      '@vitest/snapshot': 2.1.8
+      '@vitest/spy': 2.1.8
+      '@vitest/utils': 2.1.8
+      chai: 5.1.2
+      debug: 4.4.0
+      expect-type: 1.1.0
+      magic-string: 0.30.15
+      pathe: 1.1.2
+      std-env: 3.8.0
+      tinybench: 2.9.0
+      tinyexec: 0.3.1
+      tinypool: 1.0.2
+      tinyrainbow: 1.2.0
+      vite: 5.4.11(@types/node@18.19.67)
+      vite-node: 2.1.8(@types/node@18.19.67)
+      why-is-node-running: 2.3.0
+    optionalDependencies:
+      '@types/node': 18.19.67
+    transitivePeerDependencies:
+      - less
+      - lightningcss
+      - msw
+      - sass
+      - sass-embedded
+      - stylus
+      - sugarss
+      - supports-color
+      - terser
+
   vitest@2.1.8(@types/node@22.10.1):
     dependencies:
       '@vitest/expect': 2.1.8
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index 7104d705..ca6439c9 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -1,3 +1,4 @@
 packages:
   - 'packages/*'
   - 'tooling/*'
+  - 'integration-tests'