diff --git a/profiles/sets/coding/agents/pi.nix b/profiles/sets/coding/agents/pi.nix
index 2cada13..20b3cdb 100644
--- a/profiles/sets/coding/agents/pi.nix
+++ b/profiles/sets/coding/agents/pi.nix
@@ -4,8 +4,8 @@
     agentsInput = inputs.agents;
 
     modelOverrides = {
-      chiron = "minimax/MiniMax-M2.7";
-      chiron-forge = "minimax/MiniMax-M2.7";
+      chiron = "openai-codex/gpt-5.5";
+      chiron-forge = "openai-codex/gpt-5.5";
     };
 
     # Coding rules for Pi agent
@@ -34,6 +34,7 @@
     settings = {
       packages = [
         "npm:@dreadedzombie/pi-init"
+        "git:github.com/a5c-ai/babysitter-pi"
         "npm:@plannotator/pi-extension"
         "npm:@thesethrose/pi-zai-provider"
         "npm:pi-agent-browser-native"
@@ -49,8 +50,8 @@
         "git:github.com/hk-vk/pi-connect"
       ];
 
-      defaultProvider = "minimax";
-      defaultModel = "MiniMax-M2.7";
+      defaultProvider = "openai-codex";
+      defaultModel = "gpt-5.5";
       defaultThinkingLevel = "high";
     };
 
@@ -59,7 +60,7 @@
     # NOTE: Local project .pi/extensions/guardrails.json can override same rule IDs.
     #       For immutable global policies, consider a wrapper or upstream patch.
     guardrails = {
-      enable = true;
+      enable = false;
       config = {
         enabled = true;
         applyBuiltinDefaults = true;
diff --git a/profiles/sets/coding/core/packages.nix b/profiles/sets/coding/core/packages.nix
index 760a8db..624cfa2 100644
--- a/profiles/sets/coding/core/packages.nix
+++ b/profiles/sets/coding/core/packages.nix
@@ -9,5 +9,6 @@
     jq
     ripgrep
     tree
+    worktrunk
   ];
 }