Fix Claude Code Home Manager config

Generate Claude settings from Nix so managed commands use the correct home directory, add declarative keybindings for Shift+Enter newline support, and replace the broken inline docs hook with a portable script.

Also stop exporting CLAUDE_CONFIG_DIR so Claude no longer splits managed config between ~/.claude and ~/.config/claude, and fix the status line script shebang for NixOS.

Co-authored-by: Codex <noreply@openai.com>

config/claude/keybindings.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "https://www.schemastore.org/claude-code-keybindings.json",
+  "$docs": "https://code.claude.com/docs/en/keybindings",
+  "bindings": [
+    {
+      "context": "Chat",
+      "bindings": {
+        "shift+enter": "chat:newline"
+      }
+    }
+  ]
+}

config/claude/settings.json

@@ -1,27 +0,0 @@
-{
-  "$schema": "https://json.schemastore.org/claude-code-settings.json",
-  "env": {
-    "CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS": "1"
-  },
-  "permissions": {
-    "defaultMode": "bypassPermissions"
-  },
-  "hooks": {
-    "PreToolUse": [
-      {
-        "matcher": "Read",
-        "hooks": [
-          {
-            "type": "command",
-            "command": "if [[ $(jq -r .tool_input.file_path 2>/dev/null) == */Users/rathi/Documents/GitHub/claude-code-docs/* ]]; then LAST_PULL=\"/Users/rathi/Documents/GitHub/claude-code-docs/.last_pull\" && NOW=$(date +%s) && GITHUB_TS=$(jq -r .last_updated \"/Users/rathi/Documents/GitHub/claude-code-docs/docs/docs_manifest.json\" 2>/dev/null | cut -d. -f1) && GITHUB_UNIX=$(date -j -u -f \"%Y-%m-%dT%H:%M:%S\" \"$GITHUB_TS\" \"+%s\" 2>/dev/null || echo 0) && if [[ -f \"$LAST_PULL\" ]]; then LAST=$(cat \"$LAST_PULL\"); if [[ $GITHUB_UNIX -gt $LAST ]]; then echo \"🔄 Updating docs to latest version...\" >&2 && (cd /Users/rathi/Documents/GitHub/claude-code-docs && git pull --quiet) && echo $NOW > \"$LAST_PULL\"; fi; else echo \"🔄 Syncing docs for the first time...\" >&2 && (cd /Users/rathi/Documents/GitHub/claude-code-docs && git pull --quiet) && echo $NOW > \"$LAST_PULL\"; fi; fi"
-          }
-        ]
-      }
-    ]
-  },
-  "statusLine": {
-    "type": "command",
-    "command": "/Users/rathi/.claude/statusline.sh"
-  },
-  "voiceEnabled": true
-}

config/claude/statusline.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Full-featured status line with context window usage
 # Usage: Copy to ~/.claude/statusline.sh and make executable
 #

config/claude/sync-docs.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+docs_dir="${HOME}/Documents/GitHub/claude-code-docs"
+manifest="${docs_dir}/docs/docs_manifest.json"
+last_pull="${docs_dir}/.last_pull"
+
+file_path="$(jq -r '.tool_input.file_path // empty' 2>/dev/null || true)"
+case "${file_path}" in
+  "${docs_dir}"/*) ;;
+  *) exit 0 ;;
+esac
+
+if [[ ! -d "${docs_dir}/.git" || ! -f "${manifest}" ]]; then
+  exit 0
+fi
+
+github_unix="$(
+  python3 - "${manifest}" <<'PY'
+import datetime
+import json
+import sys
+
+manifest_path = sys.argv[1]
+
+try:
+    with open(manifest_path, encoding="utf-8") as handle:
+        last_updated = json.load(handle).get("last_updated", "")
+    last_updated = last_updated.split(".", 1)[0]
+    parsed = datetime.datetime.strptime(last_updated, "%Y-%m-%dT%H:%M:%S")
+    print(int(parsed.replace(tzinfo=datetime.timezone.utc).timestamp()))
+except Exception:
+    print(0)
+PY
+)"
+
+last_synced=0
+if [[ -f "${last_pull}" ]]; then
+  last_synced="$(cat "${last_pull}" 2>/dev/null || echo 0)"
+fi
+
+if [[ "${github_unix}" -le "${last_synced}" ]]; then
+  exit 0
+fi
+
+printf 'Syncing Claude docs to latest version...\n' >&2
+git -C "${docs_dir}" pull --quiet
+date +%s > "${last_pull}"

home/claude.nix

@@ -1,24 +1,60 @@
 {
+  config,
   inputs,
   pkgs,
   ...
 }:
 let
   claudePackage = inputs.claudeCode.packages.${pkgs.stdenv.hostPlatform.system}.default;
+  jsonFormat = pkgs.formats.json { };
+  claudeSettings = jsonFormat.generate "claude-settings.json" {
+    "$schema" = "https://json.schemastore.org/claude-code-settings.json";
+    env = {
+      CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS = "1";
+    };
+    permissions = {
+      defaultMode = "bypassPermissions";
+    };
+    hooks = {
+      PreToolUse = [
+        {
+          matcher = "Read";
+          hooks = [
+            {
+              type = "command";
+              command = "${config.home.homeDirectory}/.claude/sync-docs.sh";
+            }
+          ];
+        }
+      ];
+    };
+    statusLine = {
+      type = "command";
+      command = "${config.home.homeDirectory}/.claude/statusline.sh";
+    };
+    voiceEnabled = true;
+  };
 in
 {
   home.file.".local/bin/claude".source = "${claudePackage}/bin/claude";
 
-  # Claude Code still resolves user settings from ~/.claude rather than XDG.
+  # Claude Code stores shared config, commands, plugins, and skills in ~/.claude.
+  # Global UI settings changed through /config still live in ~/.claude.json and are
+  # intentionally left user-managed because Claude mutates that file directly.
   home.file.".claude/CLAUDE.md".source = ../config/claude/CLAUDE.md;
   home.file.".claude/commands" = {
     source = ../config/claude/commands;
     recursive = true;
   };
-  home.file.".claude/settings.json".source = ../config/claude/settings.json;
+  home.file.".claude/settings.json".source = claudeSettings;
   home.file.".claude/settings.local.json".source = ../config/claude/settings.local.json;
+  home.file.".claude/keybindings.json".source = ../config/claude/keybindings.json;
   home.file.".claude/statusline.sh" = {
     source = ../config/claude/statusline.sh;
     executable = true;
   };
+  home.file.".claude/sync-docs.sh" = {
+    source = ../config/claude/sync-docs.sh;
+    executable = true;
+  };
 }

home/xdg.nix

@@ -40,9 +40,6 @@ in
       AWS_SHARED_CREDENTIALS_FILE = "${config.xdg.configHome}/aws/credentials";
       AWS_CONFIG_FILE = "${config.xdg.configHome}/aws/config";
     })
-    (lib.mkIf (f.claude or false) {
-      CLAUDE_CONFIG_DIR = "${config.xdg.configHome}/claude";
-    })
     {
       PSQL_HISTORY = "${config.xdg.stateHome}/psql_history";
       SQLITE_HISTORY = "${config.xdg.stateHome}/sqlite_history";