feat: one-command onboarding — wanderbooks new, install.sh, justfile

wanderbooks new DIR installs the server and GUI if missing, writes the
books dir (AGENTS.md + CLAUDE.md, wanderbooks.toml, justfile, .mcp.json,
.claude/settings.json approving the server), commits, and starts claude
onboarding. install.sh: Rust + cargo install + wanderbooks new in one
line. The tax summary labels its net when accounts are uncategorized.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MtYEaR6M6Ybdhm6X98BWNu

install.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+# wanderbooks installer. One line on a new machine:
+#
+#   curl -fsSL https://git.swaits.com/swaits/wanderbooks/raw/branch/main/install.sh | sh -s -- ~/Books/Acme
+#
+# Installs Rust if needed, then the wanderbooks CLI, MCP server, and GUI
+# (into ~/.cargo/bin), then — given a directory — makes your books there and
+# starts the agent. Without a directory it just installs.
+set -eu
+
+REPO="https://git.swaits.com/swaits/wanderbooks"
+
+say() { printf '\033[1m%s\033[0m\n' "$*"; }
+
+if ! command -v cargo >/dev/null 2>&1; then
+    say "Installing Rust (rustup)…"
+    curl -fsSL https://sh.rustup.rs | sh -s -- -y --profile minimal
+    # shellcheck disable=SC1091
+    . "$HOME/.cargo/env"
+fi
+
+say "Installing wanderbooks (a few minutes, once)…"
+cargo install --locked --git "$REPO" ledger-cli ledger-mcp ledger-gui
+
+if ! command -v just >/dev/null 2>&1; then
+    say "Installing just (for the books dir's shortcuts)…"
+    cargo install --locked just
+fi
+
+if ! command -v claude >/dev/null 2>&1; then
+    say "Claude Code isn't installed: see https://claude.com/claude-code"
+fi
+
+if [ $# -gt 0 ]; then
+    # Hand the terminal to the agent when there is one.
+    if [ -t 1 ] && [ -e /dev/tty ]; then
+        exec "$HOME/.cargo/bin/wanderbooks" new "$@" </dev/tty
+    fi
+    exec "$HOME/.cargo/bin/wanderbooks" new "$@" --no-start
+fi
+say "Done. Make your books with: wanderbooks new ~/Books/YourCompany"