Strip the built-in preamble so the model identifies as running via pi
rather than duplicating identities.

Assisted-by: Claude Opus 4.6 via pi

diff --git a/.pi/agent/extensions/model-identity.ts b/.pi/agent/extensions/model-identity.ts
index 4c0c6c4b..8dbfd9a0 100644
--- a/.pi/agent/extensions/model-identity.ts
+++ b/.pi/agent/extensions/model-identity.ts
@@ -1,8 +1,9 @@
 /**
  * Model Identity Extension
  *
- * Injects the current model name into the system prompt so the model
- * knows what it's running as (useful for Assisted-by footers, etc.)
+ * Replaces the default Claude Code identity in the system prompt and
+ * injects the current model name so the model knows what it's running
+ * as (useful for Assisted-by footers, etc.)
  */
 
 import type { ExtensionAPI } from "@mariozechner/pi-coding-agent";
@@ -10,8 +11,16 @@ import type { ExtensionAPI } from "@mariozechner/pi-coding-agent";
 export default function (pi: ExtensionAPI) {
   pi.on("before_agent_start", async (event, ctx) => {
     const model = ctx.model;
-    return {
-      systemPrompt: event.systemPrompt + `\n\nYou are running as: ${model.name} (${model.provider}/${model.id})`,
-    };
+    let prompt = event.systemPrompt;
+
+    // Replace the Claude Code identity preamble
+    prompt = prompt.replace(
+      /You are Claude Code, Anthropic.s official CLI for Claude\.\s*/,
+      "",
+    );
+
+    prompt += `\n\nYou are running as: ${model.name} (${model.provider}/${model.id}) via pi`;
+
+    return { systemPrompt: prompt };
   });
 }
diff --git a/.pi/agent/settings.json b/.pi/agent/settings.json
index 02581e30..eeb197aa 100644
--- a/.pi/agent/settings.json
+++ b/.pi/agent/settings.json
@@ -1,5 +1,5 @@
 {
-  "lastChangelogVersion": "0.54.0",
+  "lastChangelogVersion": "0.55.0",
   "defaultProvider": "anthropic",
   "defaultModel": "claude-opus-4-6",
   "skills": [
diff --git a/Brewfile b/Brewfile
index 6aba2955..2b2dd1c0 100644
--- a/Brewfile
+++ b/Brewfile
@@ -1,46 +1,33 @@
 tap "kejadlen/tap", "https://git.kejadlen.dev/alpha/homebrew-tap.git"
 
 brew "ansible"
-brew "bat"
 brew "chruby"
 brew "curl"
-brew "difftastic"
-brew "direnv"
 brew "docker"
 brew "dockutil"
 brew "entr"
 brew "eza"
-brew "fd"
 brew "ffmpeg"
-brew "fzf"
 brew "git"
-brew "git-lfs"
-brew "hyperfine"
 brew "jj"
 brew "luarocks"
 brew "mas"
 brew "restic"
-brew "ripgrep"
 brew "ruby-install"
 brew "syncthing", restart_service: :changed
 brew "terraform"
 brew "tmux"
 brew "ykman"
-brew "yt-dlp"
 brew "z3"
-brew "zoxide"
 brew "zsh"
 
 ## editor things
 
 brew "ansible-language-server"
 brew "ansible-lint"
-brew "efm-langserver"
 brew "fnlfmt"
-brew "shellcheck"
 brew "terraform-ls"
 brew "yaml-language-server"
-brew "yamlfmt"
 brew "yamllint"
 
 # install from head