diff --git a/.oxlintrc.json b/.oxlintrc.json
new file mode 100644
index 0000000..7b519c7
--- /dev/null
+++ b/.oxlintrc.json
@@ -0,0 +1,195 @@
+{
+  "$schema": "./node_modules/oxlint/configuration_schema.json",
+  "plugins": ["import"],
+  "categories": {
+    "correctness": "error",
+    "suspicious": "warn",
+    "perf": "warn",
+    // style/restriction off: opt-in, contradictory grab-bags. Wanted rules enabled individually below.
+    "style": "off",
+    "restriction": "off"
+  },
+  "env": {
+    "browser": true,
+    "es2021": true
+  },
+  "ignorePatterns": [
+    "node_modules",
+    "dist",
+    "build",
+    ".svelte-kit",
+    ".vercel",
+    "*.config.js",
+    "*.config.ts"
+  ],
+  "rules": {
+    "no-console": "warn",
+    "no-debugger": "error",
+    "no-alert": "warn",
+
+    // no-cycle resolves $-aliases via tsconfig auto-discovery (no resolver config in oxlint)
+    "import/no-cycle": "error",
+    "import/no-duplicates": "warn",
+    "import/no-unassigned-import": "off", // CSS/side-effect imports are intentional
+
+    "no-sequences": "error",
+    "no-underscore-dangle": "off",
+    "no-shadow": "warn",
+    "no-implicit-coercion": "warn",
+    "no-await-in-loop": "warn",
+    "no-return-assign": "warn",
+    "no-new": "warn",
+    "no-unneeded-ternary": "warn"
+  },
+  // FSD boundaries. oxlint has no zone rule, so layer/segment direction is enforced
+  // with no-restricted-imports patterns scoped per glob. Layer order (high->low):
+  // app(exempt top shell) > routes > widgets > features > entities > shared.
+  // A layer bans imports from itself (cross-slice via alias) and every layer above.
+  // Overrides are LAST-WINS, not merged: a file matching two overrides keeps only the
+  // last rule config. So the domain override (below) is a self-contained superset, and
+  // the test/story override (last) fully disables boundary checks for those files.
+  "overrides": [
+    // shared = lowest layer: imports nothing above it
+    {
+      "files": ["src/shared/**"],
+      "rules": {
+        "no-restricted-imports": ["error", {
+          "patterns": [
+            {
+              "group": [
+                "$app",
+                "$app/*",
+                "$routes",
+                "$routes/*",
+                "$widgets",
+                "$widgets/*",
+                "$features",
+                "$features/*",
+                "$entities",
+                "$entities/*"
+              ],
+              "message": "FSD layer violation: `shared` is the lowest layer and may not import from any layer above it."
+            }
+          ]
+        }]
+      }
+    },
+    // entities: import shared only; no other entity via alias; interior ui<-only-ui
+    {
+      "files": ["src/entities/**"],
+      "rules": {
+        "no-restricted-imports": ["error", {
+          "patterns": [
+            {
+              "group": ["$app", "$app/*", "$routes", "$routes/*", "$widgets", "$widgets/*", "$features", "$features/*"],
+              "message": "FSD layer violation: `entities` may only import from `shared`."
+            },
+            {
+              "group": ["$entities", "$entities/*"],
+              "message": "FSD cross-slice violation: do not import another entity via its alias. Use relative imports inside your own slice; invert the dependency through a higher layer for cross-slice needs."
+            },
+            {
+              "group": ["../ui", "../ui/*", "../../ui/*"],
+              "message": "FSD segment violation: only `ui` may import `ui`. Interior direction is ui -> model -> domain."
+            }
+          ]
+        }]
+      }
+    },
+    // features: import entities/shared only; no other feature via alias
+    {
+      "files": ["src/features/**"],
+      "rules": {
+        "no-restricted-imports": ["error", {
+          "patterns": [
+            {
+              "group": ["$app", "$app/*", "$routes", "$routes/*", "$widgets", "$widgets/*"],
+              "message": "FSD layer violation: `features` may only import from `entities` and `shared`."
+            },
+            {
+              "group": ["$features", "$features/*"],
+              "message": "FSD cross-slice violation: do not import another feature via its alias. Invert the dependency through a higher layer (widget/route)."
+            },
+            {
+              "group": ["../ui", "../ui/*", "../../ui/*"],
+              "message": "FSD segment violation: only `ui` may import `ui`. Interior direction is ui -> model -> domain."
+            }
+          ]
+        }]
+      }
+    },
+    // widgets: import features/entities/shared only; no other widget via alias
+    {
+      "files": ["src/widgets/**"],
+      "rules": {
+        "no-restricted-imports": ["error", {
+          "patterns": [
+            {
+              "group": ["$app", "$app/*", "$routes", "$routes/*"],
+              "message": "FSD layer violation: `widgets` may only import from `features`, `entities`, and `shared`."
+            },
+            {
+              "group": ["$widgets", "$widgets/*"],
+              "message": "FSD cross-slice violation: do not import another widget via its alias. Invert the dependency through the route layer."
+            },
+            {
+              "group": ["../ui", "../ui/*", "../../ui/*"],
+              "message": "FSD segment violation: only `ui` may import `ui`. Interior direction is ui -> model -> domain."
+            }
+          ]
+        }]
+      }
+    },
+    // routes: top of the FSD list, imports any layer below; only app is above it
+    {
+      "files": ["src/routes/**"],
+      "rules": {
+        "no-restricted-imports": ["error", {
+          "patterns": [
+            { "group": ["$app", "$app/*"], "message": "FSD layer violation: `routes` may not import from `app`." }
+          ]
+        }]
+      }
+    },
+    // domain (FSD+): pure logic. Imports NO layer (not even shared) and no sibling
+    // model/ui segment. Superset: wins over the layer override above for these files.
+    {
+      "files": ["src/**/domain/**"],
+      "rules": {
+        "no-restricted-imports": ["error", {
+          "patterns": [
+            {
+              "group": [
+                "$app",
+                "$app/*",
+                "$routes",
+                "$routes/*",
+                "$widgets",
+                "$widgets/*",
+                "$features",
+                "$features/*",
+                "$entities",
+                "$entities/*",
+                "$shared",
+                "$shared/*"
+              ],
+              "message": "FSD+ domain isolation: `domain` is pure business logic and may not import any layer (including `shared`). Allowed: relative imports within `domain` and framework-agnostic npm packages."
+            },
+            {
+              "group": ["../model", "../model/*", "../../model/*", "../ui", "../ui/*", "../../ui/*"],
+              "message": "FSD+ domain isolation: `domain` may not import sibling `model` or `ui` segments. Dependency flows ui -> model -> domain, never back."
+            }
+          ]
+        }]
+      }
+    },
+    // tests/stories/fixtures legitimately cross-import (e.g. $entities/Font/testing).
+    // Must be LAST so last-wins disables boundary checks for them.
+    {
+      "files": ["**/*.test.ts", "**/*.spec.ts", "**/*.stories.svelte", "src/**/testing/**"],
+      "rules": {
+        "no-restricted-imports": "off"
+      }
+    }
+  ]
+}
diff --git a/oxlint.json b/oxlint.json
deleted file mode 100644
index ab5c55e..0000000
--- a/oxlint.json
+++ /dev/null
@@ -1,29 +0,0 @@
-{
-  "plugins": ["import"],
-  "categories": {
-    "correctness": "error",
-    "suspicious": "warn",
-    "perf": "warn",
-    "style": "warn",
-    "restriction": "error"
-  },
-  "env": {
-    "browser": true,
-    "es2021": true
-  },
-  "ignore": [
-    "node_modules",
-    "dist",
-    "build",
-    ".svelte-kit",
-    ".vercel",
-    "*.config.js",
-    "*.config.ts"
-  ],
-  "rules": {
-    "no-console": "off",
-    "no-debugger": "error",
-    "no-alert": "warn",
-    "import/no-cycle": "error"
-  }
-}