diff --git a/.vscode/launch.json b/.vscode/launch.json
index 57675f0..e5bf092 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -13,7 +13,7 @@
       "args": [
         "--disable-extensions",
         "--extensionDevelopmentPath=${workspaceFolder}",
-        "${workspaceRoot}/tests/grammar/integration"
+        "${workspaceRoot}/tests/grammar"
       ]
     }
   ]
diff --git a/syntaxes/wit.tmLanguage.json b/syntaxes/wit.tmLanguage.json
index a7f5b24..6a0dfa7 100644
--- a/syntaxes/wit.tmLanguage.json
+++ b/syntaxes/wit.tmLanguage.json
@@ -12,6 +12,9 @@
     {
       "include": "#comment"
     },
+    {
+      "include": "#feature-gate"
+    },
     {
       "include": "#package"
     },
@@ -34,6 +37,112 @@
       "comment": "whitespace token",
       "match": "\\s+"
     },
+    "feature-gate": {
+      "name": "meta.feature-gate.wit",
+      "comment": "Feature gate annotations like @unstable, @since, @deprecated",
+      "patterns": [
+        {
+          "name": "meta.annotation.unstable.wit",
+          "begin": "(@unstable)(\\()",
+          "beginCaptures": {
+            "1": {
+              "name": "keyword.control.unstable.wit"
+            },
+            "2": {
+              "name": "punctuation.brackets.round.begin.wit"
+            }
+          },
+          "patterns": [
+            {
+              "include": "#feature-gate-content"
+            }
+          ],
+          "end": "(\\))",
+          "endCaptures": {
+            "1": {
+              "name": "punctuation.brackets.round.end.wit"
+            }
+          }
+        },
+        {
+          "name": "meta.annotation.since.wit",
+          "begin": "(@since)(\\()",
+          "beginCaptures": {
+            "1": {
+              "name": "keyword.control.since.wit"
+            },
+            "2": {
+              "name": "punctuation.brackets.round.begin.wit"
+            }
+          },
+          "patterns": [
+            {
+              "include": "#feature-gate-content"
+            }
+          ],
+          "end": "(\\))",
+          "endCaptures": {
+            "1": {
+              "name": "punctuation.brackets.round.end.wit"
+            }
+          }
+        },
+        {
+          "name": "meta.annotation.deprecated.wit",
+          "begin": "(@deprecated)(\\()",
+          "beginCaptures": {
+            "1": {
+              "name": "keyword.control.deprecated.wit"
+            },
+            "2": {
+              "name": "punctuation.brackets.round.begin.wit"
+            }
+          },
+          "patterns": [
+            {
+              "include": "#feature-gate-content"
+            }
+          ],
+          "end": "(\\))",
+          "endCaptures": {
+            "1": {
+              "name": "punctuation.brackets.round.end.wit"
+            }
+          }
+        }
+      ]
+    },
+    "feature-gate-content": {
+      "name": "meta.feature-gate-content.wit",
+      "comment": "Content inside feature gate annotations",
+      "patterns": [
+        {
+          "include": "#comment"
+        },
+        {
+          "name": "meta.feature-gate-parameter.wit",
+          "match": "\\b(feature|version)\\s*(=)\\s*([^\\s,)]+|\"[^\"]*\")",
+          "captures": {
+            "1": {
+              "name": "variable.parameter.feature-gate.wit"
+            },
+            "2": {
+              "name": "keyword.operator.assignment.wit"
+            },
+            "3": {
+              "name": "string.quoted.feature-gate.wit"
+            }
+          }
+        },
+        {
+          "name": "punctuation.comma.wit",
+          "match": ","
+        },
+        {
+          "include": "#whitespace"
+        }
+      ]
+    },
     "comment": {
       "patterns": [
         {
@@ -320,7 +429,7 @@
     "world": {
       "name": "meta.world-item.wit",
       "comment": "Syntax for WIT like `world \"id\" {`",
-      "begin": "^\\b(default\\s+)?(world)\\s+%?((?<![\\-\\w])([a-z][0-9a-z]*|[A-Z][0-9A-Z]*)(([\\-])([a-z][0-9a-z]*|[A-Z][0-9A-Z]*))*)\\s*(\\{)",
+      "begin": "^\\s*\\b(default\\s+)?(world)\\s+%?((?<![\\-\\w])([a-z][0-9a-z]*|[A-Z][0-9A-Z]*)(([\\-])([a-z][0-9a-z]*|[A-Z][0-9A-Z]*))*)\\s*(\\{)",
       "beginCaptures": {
         "1": {
           "name": "storage.modifier.default.world-item.wit"
@@ -339,6 +448,9 @@
         {
           "include": "#comment"
         },
+        {
+          "include": "#feature-gate"
+        },
         {
           "name": "meta.export-item.wit",
           "comment": "Syntax for WIT like `export \"id\"`",
@@ -510,7 +622,7 @@
     "interface": {
       "name": "meta.interface-item.wit",
       "comment": "Syntax for WIT like `interface \"id\" {`",
-      "begin": "^\\b(default\\s+)?(interface)\\s+%?((?<![\\-\\w])([a-z][0-9a-z]*|[A-Z][0-9A-Z]*)(([\\-])([a-z][0-9a-z]*|[A-Z][0-9A-Z]*))*)\\s*(\\{)",
+      "begin": "^\\s*\\b(default\\s+)?(interface)\\s+%?((?<![\\-\\w])([a-z][0-9a-z]*|[A-Z][0-9A-Z]*)(([\\-])([a-z][0-9a-z]*|[A-Z][0-9A-Z]*))*)\\s*(\\{)",
       "beginCaptures": {
         "1": {
           "name": "storage.modifier.default.interface-item.wit"
@@ -529,6 +641,9 @@
         {
           "include": "#comment"
         },
+        {
+          "include": "#feature-gate"
+        },
         {
           "include": "#interface-items"
         },
@@ -592,6 +707,9 @@
     "interface-items": {
       "name": "meta.interface-items.wit",
       "patterns": [
+        {
+          "include": "#feature-gate"
+        },
         {
           "include": "#typedef-item"
         },
@@ -606,6 +724,9 @@
     "typedef-item": {
       "name": "meta.typedef-item.wit",
       "patterns": [
+        {
+          "include": "#feature-gate"
+        },
         {
           "include": "#resource"
         },
@@ -1245,6 +1366,9 @@
         {
           "include": "#comment"
         },
+        {
+          "include": "#feature-gate"
+        },
         {
           "name": "meta.constructor-type.wit",
           "begin": "\\b(constructor)\\b",
@@ -1307,6 +1431,9 @@
         }
       },
       "patterns": [
+        {
+          "include": "#feature-gate"
+        },
         {
           "include": "#function-definition"
         },
@@ -1434,4 +1561,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/tests/grammar/integration/feature-gates.wit b/tests/grammar/integration/feature-gates.wit
new file mode 100644
index 0000000..e8565c0
--- /dev/null
+++ b/tests/grammar/integration/feature-gates.wit
@@ -0,0 +1,50 @@
+package test:feature-gates@1.0.0;
+
+@unstable(feature = experimental-interface)
+interface experimental {
+    @since(version = 1.1.0)
+    stable-func: func(input: string) -> string;
+    
+    @unstable(feature = new-api)
+    experimental-func: func(data: list<u8>) -> result<string, string>;
+    
+    @deprecated(version = 2.0.0)
+    old-func: func();
+}
+
+@since(version = 1.0.0)
+interface stable-interface {
+    basic-func: func();
+    
+    @deprecated(version = 1.5.0)
+    deprecated-method: func(x: u32);
+}
+
+@unstable(feature = future-world)
+world feature-world {
+    @since(version = 1.0.0)
+    export stable: interface {
+        get-version: func() -> string;
+    }
+    
+    @unstable(feature = beta-import)
+    import experimental: interface {
+        @unstable(feature = alpha-feature)
+        test-method: func() -> bool;
+    }
+}
+
+@since(version = 1.2.0)
+interface resources {
+    @unstable(feature = experimental-resource)
+    resource connection {
+        @since(version = 1.2.0)
+        constructor(url: string);
+        
+        @unstable(feature = async-methods)
+        connect: func() -> result<(), string>;
+        
+        @deprecated(version = 2.0.0)
+        disconnect: func();
+    }
+}
diff --git a/tests/grammar/integration/feature-gates.wit.snap b/tests/grammar/integration/feature-gates.wit.snap
new file mode 100644
index 0000000..ecdb71d
--- /dev/null
+++ b/tests/grammar/integration/feature-gates.wit.snap
@@ -0,0 +1,385 @@
+>package test:feature-gates@1.0.0;
+#^^^^^^^ source.wit meta.package-decl.wit storage.modifier.package-decl.wit
+#       ^ source.wit meta.package-decl.wit
+#        ^^^^ source.wit meta.package-decl.wit meta.id.package-decl.wit meta.package-identifier.wit entity.name.namespace.package-identifier.wit entity.name.type.id.wit
+#            ^ source.wit meta.package-decl.wit meta.id.package-decl.wit meta.package-identifier.wit keyword.operator.namespace.package-identifier.wit
+#             ^^^^^^^^^^^^^ source.wit meta.package-decl.wit meta.id.package-decl.wit meta.package-identifier.wit entity.name.type.package-identifier.wit entity.name.type.id.wit
+#                          ^ source.wit meta.package-decl.wit meta.id.package-decl.wit meta.package-identifier.wit keyword.operator.versioning.package-identifier.wit
+#                           ^^^^^^ source.wit meta.package-decl.wit meta.id.package-decl.wit meta.package-identifier.wit constant.numeric.versioning.package-identifier.wit
+>
+>@unstable(feature = experimental-interface)
+#^^^^^^^^^ source.wit meta.annotation.unstable.wit keyword.control.unstable.wit
+#         ^ source.wit meta.annotation.unstable.wit punctuation.brackets.round.begin.wit
+#          ^^^^^^^ source.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                 ^ source.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                  ^ source.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                   ^ source.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                    ^^^^^^^^^^^^^^^^^^^^^^ source.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                                          ^ source.wit meta.annotation.unstable.wit punctuation.brackets.round.end.wit
+>interface experimental {
+#^^^^^^^^^ source.wit meta.interface-item.wit keyword.declaration.interface.interface-item.wit storage.type.wit
+#         ^ source.wit meta.interface-item.wit
+#          ^^^^^^^^^^^^ source.wit meta.interface-item.wit entity.name.type.id.interface-item.wit
+#                      ^ source.wit meta.interface-item.wit
+#                       ^ source.wit meta.interface-item.wit punctuation.brackets.curly.begin.wit
+>    @since(version = 1.1.0)
+#^^^^ source.wit meta.interface-item.wit meta.whitespace.wit
+#    ^^^^^^ source.wit meta.interface-item.wit meta.annotation.since.wit keyword.control.since.wit
+#          ^ source.wit meta.interface-item.wit meta.annotation.since.wit punctuation.brackets.round.begin.wit
+#           ^^^^^^^ source.wit meta.interface-item.wit meta.annotation.since.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                  ^ source.wit meta.interface-item.wit meta.annotation.since.wit meta.feature-gate-parameter.wit
+#                   ^ source.wit meta.interface-item.wit meta.annotation.since.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                    ^ source.wit meta.interface-item.wit meta.annotation.since.wit meta.feature-gate-parameter.wit
+#                     ^^^^^ source.wit meta.interface-item.wit meta.annotation.since.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                          ^ source.wit meta.interface-item.wit meta.annotation.since.wit punctuation.brackets.round.end.wit
+>    stable-func: func(input: string) -> string;
+#^^^^ source.wit meta.interface-item.wit meta.whitespace.wit
+#    ^^^^^^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#          ^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word-separator.wit
+#           ^^^^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#               ^ source.wit meta.interface-item.wit meta.func-item.wit keyword.operator.key-value.wit
+#                ^ source.wit meta.interface-item.wit meta.func-item.wit meta.whitespace.wit
+#                 ^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit keyword.other.func.func-type.wit
+#                     ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.begin.wit
+#                      ^^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit variable.parameter.id.named-type.wit
+#                           ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit keyword.operator.key-value.wit
+#                            ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit meta.whitespace.wit
+#                             ^^^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit entity.name.type.string.wit
+#                                   ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.end.wit
+#                                    ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.whitespace.wit
+#                                     ^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit keyword.operator.arrow.skinny.wit
+#                                       ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.whitespace.wit
+#                                        ^^^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit entity.name.type.string.wit
+#                                              ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit
+>    
+>    @unstable(feature = new-api)
+#^^^^ source.wit meta.interface-item.wit meta.whitespace.wit
+#    ^^^^^^^^^ source.wit meta.interface-item.wit meta.annotation.unstable.wit keyword.control.unstable.wit
+#             ^ source.wit meta.interface-item.wit meta.annotation.unstable.wit punctuation.brackets.round.begin.wit
+#              ^^^^^^^ source.wit meta.interface-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                     ^ source.wit meta.interface-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                      ^ source.wit meta.interface-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                       ^ source.wit meta.interface-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                        ^^^^^^^ source.wit meta.interface-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                               ^ source.wit meta.interface-item.wit meta.annotation.unstable.wit punctuation.brackets.round.end.wit
+>    experimental-func: func(data: list<u8>) -> result<string, string>;
+#^^^^ source.wit meta.interface-item.wit meta.whitespace.wit
+#    ^^^^^^^^^^^^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#                ^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word-separator.wit
+#                 ^^^^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#                     ^ source.wit meta.interface-item.wit meta.func-item.wit keyword.operator.key-value.wit
+#                      ^ source.wit meta.interface-item.wit meta.func-item.wit meta.whitespace.wit
+#                       ^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit keyword.other.func.func-type.wit
+#                           ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.begin.wit
+#                            ^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit variable.parameter.id.named-type.wit
+#                                ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit keyword.operator.key-value.wit
+#                                 ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit meta.whitespace.wit
+#                                  ^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit meta.list.ty.wit entity.name.type.list.wit
+#                                      ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit meta.list.ty.wit punctuation.brackets.angle.begin.wit
+#                                       ^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit meta.list.ty.wit entity.name.type.numeric.wit
+#                                         ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit meta.list.ty.wit punctuation.brackets.angle.end.wit
+#                                          ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.end.wit
+#                                           ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.whitespace.wit
+#                                            ^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit keyword.operator.arrow.skinny.wit
+#                                              ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.whitespace.wit
+#                                               ^^^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit entity.name.type.result.wit
+#                                                     ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit punctuation.brackets.angle.begin.wit
+#                                                      ^^^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit entity.name.type.string.wit
+#                                                            ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit punctuation.comma.wit
+#                                                             ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit meta.whitespace.wit
+#                                                              ^^^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit entity.name.type.string.wit
+#                                                                    ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit punctuation.brackets.angle.end.wit
+#                                                                     ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit
+>    
+>    @deprecated(version = 2.0.0)
+#^^^^ source.wit meta.interface-item.wit meta.whitespace.wit
+#    ^^^^^^^^^^^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit keyword.control.deprecated.wit
+#               ^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit punctuation.brackets.round.begin.wit
+#                ^^^^^^^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                       ^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit
+#                        ^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                         ^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit
+#                          ^^^^^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                               ^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit punctuation.brackets.round.end.wit
+>    old-func: func();
+#^^^^ source.wit meta.interface-item.wit meta.whitespace.wit
+#    ^^^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#       ^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word-separator.wit
+#        ^^^^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#            ^ source.wit meta.interface-item.wit meta.func-item.wit keyword.operator.key-value.wit
+#             ^ source.wit meta.interface-item.wit meta.func-item.wit meta.whitespace.wit
+#              ^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit keyword.other.func.func-type.wit
+#                  ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.begin.wit
+#                   ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.end.wit
+#                    ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit
+>}
+#^ source.wit meta.interface-item.wit punctuation.brackets.curly.end.wit
+>
+>@since(version = 1.0.0)
+#^^^^^^ source.wit meta.annotation.since.wit keyword.control.since.wit
+#      ^ source.wit meta.annotation.since.wit punctuation.brackets.round.begin.wit
+#       ^^^^^^^ source.wit meta.annotation.since.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#              ^ source.wit meta.annotation.since.wit meta.feature-gate-parameter.wit
+#               ^ source.wit meta.annotation.since.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                ^ source.wit meta.annotation.since.wit meta.feature-gate-parameter.wit
+#                 ^^^^^ source.wit meta.annotation.since.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                      ^ source.wit meta.annotation.since.wit punctuation.brackets.round.end.wit
+>interface stable-interface {
+#^^^^^^^^^ source.wit meta.interface-item.wit keyword.declaration.interface.interface-item.wit storage.type.wit
+#         ^ source.wit meta.interface-item.wit
+#          ^^^^^^^^^^^^^^^^ source.wit meta.interface-item.wit entity.name.type.id.interface-item.wit
+#                          ^ source.wit meta.interface-item.wit
+#                           ^ source.wit meta.interface-item.wit punctuation.brackets.curly.begin.wit
+>    basic-func: func();
+#^^^^ source.wit meta.interface-item.wit meta.whitespace.wit
+#    ^^^^^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#         ^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word-separator.wit
+#          ^^^^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#              ^ source.wit meta.interface-item.wit meta.func-item.wit keyword.operator.key-value.wit
+#               ^ source.wit meta.interface-item.wit meta.func-item.wit meta.whitespace.wit
+#                ^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit keyword.other.func.func-type.wit
+#                    ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.begin.wit
+#                     ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.end.wit
+#                      ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit
+>    
+>    @deprecated(version = 1.5.0)
+#^^^^ source.wit meta.interface-item.wit meta.whitespace.wit
+#    ^^^^^^^^^^^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit keyword.control.deprecated.wit
+#               ^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit punctuation.brackets.round.begin.wit
+#                ^^^^^^^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                       ^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit
+#                        ^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                         ^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit
+#                          ^^^^^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                               ^ source.wit meta.interface-item.wit meta.annotation.deprecated.wit punctuation.brackets.round.end.wit
+>    deprecated-method: func(x: u32);
+#^^^^ source.wit meta.interface-item.wit meta.whitespace.wit
+#    ^^^^^^^^^^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#              ^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word-separator.wit
+#               ^^^^^^ source.wit meta.interface-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#                     ^ source.wit meta.interface-item.wit meta.func-item.wit keyword.operator.key-value.wit
+#                      ^ source.wit meta.interface-item.wit meta.func-item.wit meta.whitespace.wit
+#                       ^^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit keyword.other.func.func-type.wit
+#                           ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.begin.wit
+#                            ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit variable.parameter.id.named-type.wit
+#                             ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit keyword.operator.key-value.wit
+#                              ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit meta.whitespace.wit
+#                               ^^^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit meta.named-type-list.wit entity.name.type.numeric.wit
+#                                  ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.end.wit
+#                                   ^ source.wit meta.interface-item.wit meta.func-item.wit meta.function.wit
+>}
+#^ source.wit meta.interface-item.wit punctuation.brackets.curly.end.wit
+>
+>@unstable(feature = future-world)
+#^^^^^^^^^ source.wit meta.annotation.unstable.wit keyword.control.unstable.wit
+#         ^ source.wit meta.annotation.unstable.wit punctuation.brackets.round.begin.wit
+#          ^^^^^^^ source.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                 ^ source.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                  ^ source.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                   ^ source.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                    ^^^^^^^^^^^^ source.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                                ^ source.wit meta.annotation.unstable.wit punctuation.brackets.round.end.wit
+>world feature-world {
+#^^^^^ source.wit meta.world-item.wit keyword.declaration.world.world-item.wit storage.type.wit
+#     ^ source.wit meta.world-item.wit
+#      ^^^^^^^^^^^^^ source.wit meta.world-item.wit entity.name.type.id.world-item.wit
+#                   ^ source.wit meta.world-item.wit
+#                    ^ source.wit meta.world-item.wit punctuation.brackets.curly.begin.wit
+>    @since(version = 1.0.0)
+#^^^^ source.wit meta.world-item.wit meta.whitespace.wit
+#    ^^^^^^ source.wit meta.world-item.wit meta.annotation.since.wit keyword.control.since.wit
+#          ^ source.wit meta.world-item.wit meta.annotation.since.wit punctuation.brackets.round.begin.wit
+#           ^^^^^^^ source.wit meta.world-item.wit meta.annotation.since.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                  ^ source.wit meta.world-item.wit meta.annotation.since.wit meta.feature-gate-parameter.wit
+#                   ^ source.wit meta.world-item.wit meta.annotation.since.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                    ^ source.wit meta.world-item.wit meta.annotation.since.wit meta.feature-gate-parameter.wit
+#                     ^^^^^ source.wit meta.world-item.wit meta.annotation.since.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                          ^ source.wit meta.world-item.wit meta.annotation.since.wit punctuation.brackets.round.end.wit
+>    export stable: interface {
+#^^^^ source.wit meta.world-item.wit meta.whitespace.wit
+#    ^^^^^^ source.wit meta.world-item.wit meta.export-item.wit keyword.control.export.export-item.wit
+#          ^ source.wit meta.world-item.wit meta.export-item.wit
+#           ^^^^^^ source.wit meta.world-item.wit meta.export-item.wit meta.id.export-item.wit variable.other.constant.id.export-item.wit
+#                 ^ source.wit meta.world-item.wit meta.export-item.wit meta.id.export-item.wit
+#                  ^ source.wit meta.world-item.wit meta.export-item.wit meta.whitespace.wit
+#                   ^^^^^^^^^ source.wit meta.world-item.wit meta.export-item.wit keyword.other.interface.interface-type.wit
+#                            ^ source.wit meta.world-item.wit meta.export-item.wit
+#                             ^ source.wit meta.world-item.wit meta.export-item.wit ppunctuation.brackets.curly.begin.wit
+>        get-version: func() -> string;
+#^^^^^^^^ source.wit meta.world-item.wit meta.export-item.wit meta.whitespace.wit
+#        ^^^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#           ^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word-separator.wit
+#            ^^^^^^^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#                   ^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit keyword.operator.key-value.wit
+#                    ^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit meta.whitespace.wit
+#                     ^^^^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit meta.function.wit keyword.other.func.func-type.wit
+#                         ^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.begin.wit
+#                          ^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.end.wit
+#                           ^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit meta.function.wit meta.whitespace.wit
+#                            ^^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit keyword.operator.arrow.skinny.wit
+#                              ^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.whitespace.wit
+#                               ^^^^^^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit entity.name.type.string.wit
+#                                     ^ source.wit meta.world-item.wit meta.export-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit
+>    }
+#^^^^ source.wit meta.world-item.wit meta.export-item.wit meta.whitespace.wit
+#    ^ source.wit meta.world-item.wit meta.export-item.wit punctuation.brackets.curly.end.wit
+>    
+>    @unstable(feature = beta-import)
+#^^^^ source.wit meta.world-item.wit meta.whitespace.wit
+#    ^^^^^^^^^ source.wit meta.world-item.wit meta.annotation.unstable.wit keyword.control.unstable.wit
+#             ^ source.wit meta.world-item.wit meta.annotation.unstable.wit punctuation.brackets.round.begin.wit
+#              ^^^^^^^ source.wit meta.world-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                     ^ source.wit meta.world-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                      ^ source.wit meta.world-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                       ^ source.wit meta.world-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                        ^^^^^^^^^^^ source.wit meta.world-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                                   ^ source.wit meta.world-item.wit meta.annotation.unstable.wit punctuation.brackets.round.end.wit
+>    import experimental: interface {
+#^^^^ source.wit meta.world-item.wit meta.whitespace.wit
+#    ^^^^^^ source.wit meta.world-item.wit meta.import-item.wit keyword.control.import.import-item.wit
+#          ^ source.wit meta.world-item.wit meta.import-item.wit
+#           ^^^^^^^^^^^^ source.wit meta.world-item.wit meta.import-item.wit meta.id.import-item.wit variable.other.id.import-item.wit
+#                       ^ source.wit meta.world-item.wit meta.import-item.wit meta.id.import-item.wit
+#                        ^ source.wit meta.world-item.wit meta.import-item.wit meta.whitespace.wit
+#                         ^^^^^^^^^ source.wit meta.world-item.wit meta.import-item.wit keyword.other.interface.interface-type.wit
+#                                  ^ source.wit meta.world-item.wit meta.import-item.wit
+#                                   ^ source.wit meta.world-item.wit meta.import-item.wit ppunctuation.brackets.curly.begin.wit
+>        @unstable(feature = alpha-feature)
+#^^^^^^^^ source.wit meta.world-item.wit meta.import-item.wit meta.whitespace.wit
+#        ^^^^^^^^^ source.wit meta.world-item.wit meta.import-item.wit meta.annotation.unstable.wit keyword.control.unstable.wit
+#                 ^ source.wit meta.world-item.wit meta.import-item.wit meta.annotation.unstable.wit punctuation.brackets.round.begin.wit
+#                  ^^^^^^^ source.wit meta.world-item.wit meta.import-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                         ^ source.wit meta.world-item.wit meta.import-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                          ^ source.wit meta.world-item.wit meta.import-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                           ^ source.wit meta.world-item.wit meta.import-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                            ^^^^^^^^^^^^^ source.wit meta.world-item.wit meta.import-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                                         ^ source.wit meta.world-item.wit meta.import-item.wit meta.annotation.unstable.wit punctuation.brackets.round.end.wit
+>        test-method: func() -> bool;
+#^^^^^^^^ source.wit meta.world-item.wit meta.import-item.wit meta.whitespace.wit
+#        ^^^^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#            ^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word-separator.wit
+#             ^^^^^^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#                   ^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit keyword.operator.key-value.wit
+#                    ^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit meta.whitespace.wit
+#                     ^^^^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit meta.function.wit keyword.other.func.func-type.wit
+#                         ^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.begin.wit
+#                          ^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.end.wit
+#                           ^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit meta.function.wit meta.whitespace.wit
+#                            ^^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit keyword.operator.arrow.skinny.wit
+#                              ^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.whitespace.wit
+#                               ^^^^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit entity.name.type.boolean.wit
+#                                   ^ source.wit meta.world-item.wit meta.import-item.wit meta.func-item.wit meta.function.wit meta.result-list.wit
+>    }
+#^^^^ source.wit meta.world-item.wit meta.import-item.wit meta.whitespace.wit
+#    ^ source.wit meta.world-item.wit meta.import-item.wit punctuation.brackets.curly.end.wit
+>}
+#^ source.wit meta.world-item.wit punctuation.brackets.curly.end.wit
+>
+>@since(version = 1.2.0)
+#^^^^^^ source.wit meta.annotation.since.wit keyword.control.since.wit
+#      ^ source.wit meta.annotation.since.wit punctuation.brackets.round.begin.wit
+#       ^^^^^^^ source.wit meta.annotation.since.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#              ^ source.wit meta.annotation.since.wit meta.feature-gate-parameter.wit
+#               ^ source.wit meta.annotation.since.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                ^ source.wit meta.annotation.since.wit meta.feature-gate-parameter.wit
+#                 ^^^^^ source.wit meta.annotation.since.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                      ^ source.wit meta.annotation.since.wit punctuation.brackets.round.end.wit
+>interface resources {
+#^^^^^^^^^ source.wit meta.interface-item.wit keyword.declaration.interface.interface-item.wit storage.type.wit
+#         ^ source.wit meta.interface-item.wit
+#          ^^^^^^^^^ source.wit meta.interface-item.wit entity.name.type.id.interface-item.wit
+#                   ^ source.wit meta.interface-item.wit
+#                    ^ source.wit meta.interface-item.wit punctuation.brackets.curly.begin.wit
+>    @unstable(feature = experimental-resource)
+#^^^^ source.wit meta.interface-item.wit meta.whitespace.wit
+#    ^^^^^^^^^ source.wit meta.interface-item.wit meta.annotation.unstable.wit keyword.control.unstable.wit
+#             ^ source.wit meta.interface-item.wit meta.annotation.unstable.wit punctuation.brackets.round.begin.wit
+#              ^^^^^^^ source.wit meta.interface-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                     ^ source.wit meta.interface-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                      ^ source.wit meta.interface-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                       ^ source.wit meta.interface-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                        ^^^^^^^^^^^^^^^^^^^^^ source.wit meta.interface-item.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                                             ^ source.wit meta.interface-item.wit meta.annotation.unstable.wit punctuation.brackets.round.end.wit
+>    resource connection {
+#^^^^ source.wit meta.interface-item.wit meta.whitespace.wit
+#    ^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit keyword.other.resource.wit
+#            ^ source.wit meta.interface-item.wit meta.resource-item.wit
+#             ^^^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit entity.name.type.id.resource.wit
+#                       ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.whitespace.wit
+#                        ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit punctuation.brackets.curly.begin.wit
+>        @since(version = 1.2.0)
+#^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.whitespace.wit
+#        ^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.since.wit keyword.control.since.wit
+#              ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.since.wit punctuation.brackets.round.begin.wit
+#               ^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.since.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                      ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.since.wit meta.feature-gate-parameter.wit
+#                       ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.since.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                        ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.since.wit meta.feature-gate-parameter.wit
+#                         ^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.since.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                              ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.since.wit punctuation.brackets.round.end.wit
+>        constructor(url: string);
+#^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.whitespace.wit
+#        ^^^^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.constructor-type.wit keyword.other.constructor.constructor-type.wit
+#                   ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.constructor-type.wit meta.param-list.wit punctuation.brackets.round.begin.wit
+#                    ^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.constructor-type.wit meta.param-list.wit meta.named-type-list.wit variable.parameter.id.named-type.wit
+#                       ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.constructor-type.wit meta.param-list.wit meta.named-type-list.wit keyword.operator.key-value.wit
+#                        ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.constructor-type.wit meta.param-list.wit meta.named-type-list.wit meta.whitespace.wit
+#                         ^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.constructor-type.wit meta.param-list.wit meta.named-type-list.wit entity.name.type.string.wit
+#                               ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.constructor-type.wit meta.param-list.wit punctuation.brackets.round.end.wit
+#                                ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.constructor-type.wit
+>        
+>        @unstable(feature = async-methods)
+#^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.whitespace.wit
+#        ^^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.unstable.wit keyword.control.unstable.wit
+#                 ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.unstable.wit punctuation.brackets.round.begin.wit
+#                  ^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                         ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                          ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                           ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit
+#                            ^^^^^^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.unstable.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                                         ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.unstable.wit punctuation.brackets.round.end.wit
+>        connect: func() -> result<(), string>;
+#^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.whitespace.wit
+#        ^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#               ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit keyword.operator.key-value.wit
+#                ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.whitespace.wit
+#                 ^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit keyword.other.func.func-type.wit
+#                     ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.begin.wit
+#                      ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.end.wit
+#                       ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.whitespace.wit
+#                        ^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.result-list.wit keyword.operator.arrow.skinny.wit
+#                          ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.whitespace.wit
+#                           ^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit entity.name.type.result.wit
+#                                 ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit punctuation.brackets.angle.begin.wit
+#                                  ^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit
+#                                    ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit punctuation.comma.wit
+#                                     ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit meta.whitespace.wit
+#                                      ^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit entity.name.type.string.wit
+#                                            ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.result-list.wit meta.result.ty.wit punctuation.brackets.angle.end.wit
+#                                             ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.result-list.wit
+>        
+>        @deprecated(version = 2.0.0)
+#^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.whitespace.wit
+#        ^^^^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.deprecated.wit keyword.control.deprecated.wit
+#                   ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.deprecated.wit punctuation.brackets.round.begin.wit
+#                    ^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit variable.parameter.feature-gate.wit
+#                           ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit
+#                            ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit keyword.operator.assignment.wit
+#                             ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit
+#                              ^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.deprecated.wit meta.feature-gate-parameter.wit string.quoted.feature-gate.wit
+#                                   ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.annotation.deprecated.wit punctuation.brackets.round.end.wit
+>        disconnect: func();
+#^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.whitespace.wit
+#        ^^^^^^^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit entity.name.function.id.func-item.wit meta.word.wit
+#                  ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit keyword.operator.key-value.wit
+#                   ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.whitespace.wit
+#                    ^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit keyword.other.func.func-type.wit
+#                        ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.begin.wit
+#                         ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit meta.param-list.wit punctuation.brackets.round.end.wit
+#                          ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.func-item.wit meta.function.wit
+>    }
+#^^^^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit meta.whitespace.wit
+#    ^ source.wit meta.interface-item.wit meta.resource-item.wit meta.resource-methods.wit punctuation.brackets.curly.end.wit
+>}
+#^ source.wit meta.interface-item.wit punctuation.brackets.curly.end.wit
+>
\ No newline at end of file
diff --git a/tests/grammar/unit/basic-feature-gates.wit b/tests/grammar/unit/basic-feature-gates.wit
new file mode 100644
index 0000000..d32d8a9
--- /dev/null
+++ b/tests/grammar/unit/basic-feature-gates.wit
@@ -0,0 +1,18 @@
+// SYNTAX TEST "source.wit" "This tests basic feature gate annotations"
+
+package test:basic@1.0.0;
+
+@unstable(feature = test-feature)
+interface basic {
+    test-func: func();
+}
+
+@since(version = 1.0.0)
+interface stable {
+    stable-func: func();
+}
+
+@deprecated(version = 2.0.0)
+interface old {
+    old-func: func();
+}
diff --git a/tests/grammar/unit/feature-gates-test.wit b/tests/grammar/unit/feature-gates-test.wit
new file mode 100644
index 0000000..d3edaee
--- /dev/null
+++ b/tests/grammar/unit/feature-gates-test.wit
@@ -0,0 +1,90 @@
+// SYNTAX TEST "source.wit" "This tests comprehensive feature gate annotations"
+
+// Test file for feature gate annotations
+package example:feature-gates@1.0.0;
+
+/// Interface with unstable feature gate
+@unstable(feature = wasi-io)
+interface io {
+    /// Function with since annotation
+    @since(version = 1.2.0)
+    read: func(fd: u32) -> result<list<u8>, error>;
+    
+    /// Function with deprecated annotation
+    @deprecated(version = 2.0.0)
+    write-old: func(fd: u32, data: list<u8>) -> result<_, error>;
+}
+
+/// World with feature gates
+@unstable(feature = experimental-world)
+world example {
+    /// Export with since annotation
+    @since(version = 1.1.0)
+    export log: interface {
+        @since(version = 1.1.0)
+        info: func(msg: string);
+        
+        @deprecated(version = 2.0.0)
+        debug: func(msg: string);
+    }
+    
+    /// Import with unstable feature
+    @unstable(feature = network-io)
+    import socket: interface {
+        connect: func(addr: string) -> result<u32, error>;
+    }
+}
+
+/// Types with feature gates
+@since(version = 1.0.0)
+interface types {
+    /// Record with unstable annotation
+    @unstable(feature = advanced-types)
+    record config {
+        name: string,
+        @since(version = 1.1.0)
+        timeout: option<u32>,
+    }
+    
+    /// Enum with deprecation
+    @deprecated(version = 2.0.0)
+    enum status {
+        ok,
+        error,
+        @unstable(feature = new-status)
+        pending,
+    }
+    
+    /// Variant with feature gates
+    @since(version = 1.0.0)
+    variant result-type {
+        success(string),
+        @deprecated(version = 1.5.0)
+        failure(string),
+    }
+    
+    /// Flags with annotations
+    @unstable(feature = flag-extensions)
+    flags permissions {
+        read,
+        write,
+        @since(version = 1.2.0)
+        execute,
+    }
+    
+    /// Type alias with feature gate
+    @since(version = 1.1.0)
+    type user-id = u32;
+    
+    /// Resource with feature gate
+    @unstable(feature = resource-management)
+    resource file {
+        constructor(path: string);
+        
+        @since(version = 1.1.0)
+        read: func() -> string;
+        
+        @deprecated(version = 2.0.0)
+        write-sync: func(data: string);
+    }
+}