From 4dd53a0dd0c2118f32b494aec6f04a7e81a765f4 Mon Sep 17 00:00:00 2001
From: John Ogle <johno@squareup.com>
Date: Sat, 14 Feb 2026 17:17:44 -0800
Subject: [PATCH] feat(dev): add Claude Code statusline config via activation
 hook

---
 home/roles/development/default.nix | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/home/roles/development/default.nix b/home/roles/development/default.nix
index 2656809..42d1b7d 100644
--- a/home/roles/development/default.nix
+++ b/home/roles/development/default.nix
@@ -110,6 +110,12 @@ let
     ref = "main";
   };
 
+  # Claude Code statusline: shows model, cwd, git branch, and context usage %
+  claudeCodeStatusLineConfig = pkgs.writeText "claude-statusline.json" (builtins.toJSON {
+    type = "command";
+    command = ''input=$(cat); model=$(echo "$input" | jq -r '.model.display_name'); cwd=$(echo "$input" | jq -r '.workspace.current_dir'); if git -C "$cwd" rev-parse --git-dir > /dev/null 2>&1; then branch=$(git -C "$cwd" --no-optional-locks rev-parse --abbrev-ref HEAD 2>/dev/null || echo ""); if [ -n "$branch" ]; then git_info=" on $branch"; else git_info=""; fi; else git_info=""; fi; usage=$(echo "$input" | jq '.context_window.current_usage'); if [ "$usage" != "null" ]; then current=$(echo "$usage" | jq '.input_tokens + .cache_creation_input_tokens + .cache_read_input_tokens'); size=$(echo "$input" | jq '.context_window.context_window_size'); pct=$((current * 100 / size)); context_info=" | ''${pct}% context"; else context_info=""; fi; printf "%s in %s%s%s" "$model" "$cwd" "$git_info" "$context_info"'';
+  });
+
 in
 {
   options.home.roles.development = {
@@ -251,6 +257,18 @@ in
       $DRY_RUN_CMD echo "Claude Code beads integration configured (hooks installed)"
     '';
 
+    # Configure Claude Code statusline (merge into existing settings.json)
+    home.activation.claudeCodeStatusLine = lib.hm.dag.entryAfter ["writeBoundary" "claudeCodeBeadsSetup"] ''
+      SETTINGS="$HOME/.claude/settings.json"
+      mkdir -p "$HOME/.claude"
+      if [ -f "$SETTINGS" ]; then
+        ${pkgs.jq}/bin/jq --slurpfile sl ${claudeCodeStatusLineConfig} '.statusLine = $sl[0]' "$SETTINGS" > "''${SETTINGS}.tmp" && mv "''${SETTINGS}.tmp" "$SETTINGS"
+      else
+        ${pkgs.jq}/bin/jq -n --slurpfile sl ${claudeCodeStatusLineConfig} '{statusLine: $sl[0]}' > "$SETTINGS"
+      fi
+      $DRY_RUN_CMD echo "Claude Code statusline configured"
+    '';
+
     # Beads timer gate checker (Linux only - uses systemd)
     # Runs every 5 minutes to auto-resolve expired timer gates across all beads projects
     # This enables self-scheduling molecules (watchers, patrols, etc.)