Fix tests

src/sync.luau

@@ -27,9 +27,14 @@ local function sync(to: string): result.Identity<boolean>
         fs.writeDir(to)
     end
 
+    if not fs.metadata(`{to}/addons`).exists then
+        fs.writeDir(`{to}/addons`)
+    end
+
     progress:nextStage() -- fetch
 
     local includes = {
+        "addons/observers.luau",
         "jecs.luau",
         "README.md",
         "CHANGELOG.md",

src/test.luau

@@ -46,23 +46,23 @@ local function test(origin: string): result.Identity<boolean>
 
     progress:nextStage() -- fetch
 
-    do
-        local contents = shared.fetch_raw("tools/testkit.luau")
+    local includes = {
+        "tools/testkit.luau",
+        "tools/runtime_lints.luau",
+        "tools/lifetime_tracker.luau",
+        "tools/entity_visualiser.luau",
+        "test/tests.luau",
+    }
+
+    for _, file in includes do
+        local contents = shared.fetch_raw(file)
         if not contents.ok then
             progress:stop()
-            stdio.ewrite(`🔥 Couldn't get the latest source for tools/testkit.luau:\n{contents.err}\n`)
-            return result(false, "Couldn't get the latest source for tools/testkit.luau.")
+            stdio.ewrite(`🔥 Couldn't get the latest source for {file}:\n{contents.err}\n`)
+            return result(false, `Couldn't get the latest source for {file}.`)
         end
-        fs.writeFile(`{origin}/tools/testkit.luau`, contents.val)
-    end
-    do
-        local contents = shared.fetch_raw("test/tests.luau")
-        if not contents.ok then
-            progress:stop()
-            stdio.ewrite(`🔥 Couldn't get the latest source for test/tests.luau:\n{contents.err}\n`)
-            return result(false, "Couldn't get the latest source for test/tests.luau.")
-        end
-        fs.writeFile(`{origin}/test/tests.luau`, contents.val)
+
+        fs.writeFile(`{origin}/{file}`, contents.val)
     end
 
     progress:nextStage() -- test