diff --git a/apis/libaihelloworld.lua b/apis/libaihelloworld.lua
index fa88ee7..88bed37 100644
--- a/apis/libaihelloworld.lua
+++ b/apis/libaihelloworld.lua
@@ -1,4 +1,4 @@
-local _VERSION = '0.2.1';
+local _VERSION = '0.2.2';
 
 local DEFAULT_PROMPT = 'reply with exactly: pong';
 
@@ -66,7 +66,7 @@ local function createAiHelloWorld(opts)
   local function resolveConfig(options)
     local url = options.serverUrl or settingsLib.get('opencc.server_url');
     if not url or url == '' then
-      return nil, 'missing opencc.server_url; run: settings set opencc.server_url <url>';
+      return nil, 'missing opencc.server_url; run: set opencc.server_url <url>';
     end
     local username = options.username or settingsLib.get('opencc.username') or 'opencode';
     local password = options.password or settingsLib.get('opencc.password') or '';
diff --git a/docs/opencode_server_guide.md b/docs/opencode_server_guide.md
index 93c618c..6862f23 100644
--- a/docs/opencode_server_guide.md
+++ b/docs/opencode_server_guide.md
@@ -55,35 +55,28 @@ opencode attach http://127.0.0.1:4096
 
 To target a specific session from CC, grab the session ID shown in the TUI and run:
 
-```
-settings set opencc.session_id ses_abc123
+```sh
+set opencc.session_id ses_abc123
 ```
 
 ## 3. Configure CC settings
 
-Run in the ComputerCraft console or CraftOS-PC terminal:
+Use the CraftOS shell `set` program at the ComputerCraft console or CraftOS-PC terminal. It persists immediately — no `save` step. The Lua [settings](https://tweaked.cc/module/settings.html) API would also work from a script, but at the shell prompt use `set`.
 
-// TOFIX: "settings" does not exist, it was hallucinated by LLM at some point -> but set opencc.userver_url work
-
-```lua
-settings set opencc.server_url http://<host-ip>:4096
-settings save
+```sh
+set opencc.server_url http://<host-ip>:4096
 ```
 
-// TOFIX: same here
 With auth:
 
-```lua
-settings set opencc.password secret
-settings save
+```sh
+set opencc.password secret
 ```
 
-// TOFIX: same here
 Optional — override the Basic Auth username (default `opencode`):
 
-```lua
-settings set opencc.username myuser
-settings save
+```sh
+set opencc.username myuser
 ```
 
 - **CraftOS-PC (localhost):** `http://127.0.0.1:4096`
@@ -113,7 +106,7 @@ Set settings inside the harness before running, or inject them via the test API.
 
 | Error | Cause | Fix |
 |---|---|---|
-| `missing opencc.server_url` | Setting not set | `settings set opencc.server_url http://...` |
+| `missing opencc.server_url` | Setting not set | `set opencc.server_url http://...` |
 | `serveur injoignable` | Server not running or wrong URL | Start `opencode serve`, check URL/port |
 | `erreur message: HTTP 401` | Wrong password | Check `opencc.password` matches `OPENCODE_SERVER_PASSWORD` |
 | `session introuvable; lance: ai-helloworld --new` | Session was deleted or server restarted | Run `ai-helloworld --new` |
diff --git a/tests/ai-helloworld.lua b/tests/ai-helloworld.lua
index 261a6d1..39cf95f 100644
--- a/tests/ai-helloworld.lua
+++ b/tests/ai-helloworld.lua
@@ -123,6 +123,8 @@ testlib.test('listSessions fails when server_url missing', function()
 
   testlib.assertTrue(not ok);
   testlib.assertTrue(string.find(err, 'opencc.server_url', 1, true) ~= nil);
+  testlib.assertTrue(string.find(err, 'set opencc.server_url', 1, true) ~= nil);
+  testlib.assertTrue(string.find(err, 'settings set', 1, true) == nil);
   testlib.assertEquals(#httpStub.getCalls, 0);
 end);
 
@@ -252,6 +254,8 @@ testlib.test('askHello fails with missing server_url', function()
 
   testlib.assertTrue(not ok);
   testlib.assertTrue(string.find(err, 'opencc.server_url', 1, true) ~= nil);
+  testlib.assertTrue(string.find(err, 'set opencc.server_url', 1, true) ~= nil);
+  testlib.assertTrue(string.find(err, 'settings set', 1, true) == nil);
   testlib.assertEquals(#httpStub.postCalls, 0);
 end);