diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..5f3b90f
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,21 @@
+# Flipper Expressions
+
+JSON Schema (`schemas/*.json`) and JS library for Flipper Expressions. The schemas are the canonical spec; the Ruby gem reimplements the expressions and vendors these schemas + examples for its tests.
+
+## Keep flipper in sync when schemas or examples change
+
+Any time `schemas/*.json` or `examples/*.json` change here, the vendored copies in the [flippercloud/flipper](https://github.com/flippercloud/flipper) gem must be re-synced and its specs re-run — otherwise Ruby and JS drift apart.
+
+In a flipper checkout:
+
+```sh
+# Copies schemas/*.json and examples/*.json from this repo into flipper
+# (lib/flipper/expression/schemas + spec/fixtures/expressions/examples).
+# Defaults to a sibling ../expressions checkout; override with SOURCE.
+rake expressions:vendor SOURCE=/path/to/expressions
+
+# Then run flipper's specs to confirm Ruby agrees with the schema/examples.
+bundle exec rspec spec/flipper/expression/schema_spec.rb
+```
+
+See the README's "Adding a new expression" section for the full cross-repo workflow.
diff --git a/examples/FeatureEnabled.json b/examples/FeatureEnabled.json
new file mode 100644
index 0000000..816ce2a
--- /dev/null
+++ b/examples/FeatureEnabled.json
@@ -0,0 +1,15 @@
+{
+  "valid": [
+    {
+      "expression": { "FeatureEnabled": ["other_feature"] }
+    },
+    {
+      "expression": { "FeatureEnabled": [{ "Property": ["feature_name"] }] }
+    }
+  ],
+  "invalid": [
+    { "FeatureEnabled": [] },
+    { "FeatureEnabled": ["a", "b"] },
+    { "FeatureEnabled": ["a"], "Any": [] }
+  ]
+}
diff --git a/package.json b/package.json
index 45c2f6d..903041e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
-  "name": "@flippercloud.io/expressions",
-  "version": "1.0.0",
+  "name": "@flippercloud/expressions",
+  "version": "1.1.0",
   "description": "Library and Schema for evaluating Flipper Expressions",
   "type": "module",
   "files": [
@@ -16,7 +16,7 @@
       "require": "./dist/expressions.umd.cjs"
     }
   },
-  "repository": "https:://github.com/jnunemaker/flipper",
+  "repository": "https://github.com/flippercloud/expressions",
   "license": "MIT",
   "dependencies": {
     "ajv": "^8.12.0",
diff --git a/schemas/FeatureEnabled.schema.json b/schemas/FeatureEnabled.schema.json
new file mode 100644
index 0000000..f53a53b
--- /dev/null
+++ b/schemas/FeatureEnabled.schema.json
@@ -0,0 +1,11 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "https://www.flippercloud.io/expressions/FeatureEnabled.schema.json",
+  "title": "FeatureEnabled",
+  "description": "Returns true if the named feature is enabled for the current actor.",
+  "category": "Value",
+  "type": "array",
+  "items": { "$ref": "schema.json#/definitions/string" },
+  "minItems": 1,
+  "maxItems": 1
+}
diff --git a/schemas/PercentageOfActors.schema.json b/schemas/PercentageOfActors.schema.json
index e512104..92a60c4 100644
--- a/schemas/PercentageOfActors.schema.json
+++ b/schemas/PercentageOfActors.schema.json
@@ -2,7 +2,8 @@
   "$schema": "http://json-schema.org/draft-07/schema#",
   "$id": "https://www.flippercloud.io/expressions/PercentageOfActors.schema.json",
   "title": "PercentageOfActors",
-  "description": "",
+  "description": "Returns true when the actor falls within the given percentage for the feature.",
+  "category": "Condition",
   "type": "array",
   "items": [
     { "$ref": "schema.json#/definitions/string" },
diff --git a/schemas/Property.schema.json b/schemas/Property.schema.json
index 0d564ad..f0c41ec 100644
--- a/schemas/Property.schema.json
+++ b/schemas/Property.schema.json
@@ -3,6 +3,7 @@
   "$id": "https://www.flippercloud.io/expressions/Property.schema.json",
   "title": "Property",
   "description": "Extract a property from context[properties].",
+  "category": "Value",
   "type": "array",
   "items": { "$ref": "schema.json#/definitions/string" },
   "minItems": 1,
diff --git a/schemas/Random.schema.json b/schemas/Random.schema.json
index dcdd89e..d719680 100644
--- a/schemas/Random.schema.json
+++ b/schemas/Random.schema.json
@@ -3,6 +3,7 @@
   "$id": "https://www.flippercloud.io/expressions/Random.schema.json",
   "title": "Random",
   "description": "Return a random number",
+  "category": "Value",
   "type": "array",
   "items": {
     "title": "Maximum",
diff --git a/schemas/Time.schema.json b/schemas/Time.schema.json
index cc7bac7..4db6410 100644
--- a/schemas/Time.schema.json
+++ b/schemas/Time.schema.json
@@ -3,6 +3,7 @@
   "$id": "https://www.flippercloud.io/expressions/Time.schema.json",
   "title": "Time",
   "description": "A time in ISO8601 format",
+  "category": "Value",
   "type": "array",
   "items": {
     "title": "Time",
diff --git a/schemas/schema.json b/schemas/schema.json
index f12d30a..682576a 100644
--- a/schemas/schema.json
+++ b/schemas/schema.json
@@ -44,6 +44,7 @@
         "Divide": { "$ref": "Divide.schema.json" },
         "Duration": { "$ref": "Duration.schema.json" },
         "Equal": { "$ref": "Equal.schema.json" },
+        "FeatureEnabled": { "$ref": "FeatureEnabled.schema.json" },
         "GreaterThan": { "$ref": "GreaterThan.schema.json" },
         "GreaterThanOrEqualTo": { "$ref": "GreaterThanOrEqualTo.schema.json" },
         "LessThan": { "$ref": "LessThan.schema.json" },
diff --git a/vite.config.js b/vite.config.js
index a4961e2..01820f0 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -7,7 +7,7 @@ export default defineConfig({
     sourcemap: true,
     lib: {
       entry: resolve(__dirname, 'lib/index.js'),
-      name: '@flippercloud.io/expressions'
+      name: '@flippercloud/expressions'
     },
     rollupOptions: {
       external: [