Files
bootstrap/bin/mosaic-ensure-excalidraw
Jason Woltje 8c960eee9d feat: integrate excalidraw MCP into bootstrap and runtime setup
- install.sh: run mosaic-ensure-excalidraw post-install (non-fatal)
- runtime-setup.ts: configure excalidraw MCP during wizard setup
- bin/mosaic-ensure-excalidraw: install deps + register MCP with Claude
- runtime/mcp/EXCALIDRAW.json: MCP server config template
- tools/excalidraw/: headless .excalidraw → SVG export server

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-04 17:59:33 -06:00

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#!/usr/bin/env bash
set -euo pipefail
MOSAIC_HOME="${MOSAIC_HOME:-$HOME/.config/mosaic}"
TOOLS_DIR="$MOSAIC_HOME/tools/excalidraw"
MODE="apply"
SCOPE="user"
err() { echo "[mosaic-excalidraw] ERROR: $*" >&2; }
log() { echo "[mosaic-excalidraw] $*"; }
while [[ $# -gt 0 ]]; do
case "$1" in
--check) MODE="check"; shift ;;
--scope)
if [[ $# -lt 2 ]]; then
err "--scope requires a value: user|local"
exit 2
fi
SCOPE="$2"
shift 2
;;
*)
err "Unknown argument: $1"
exit 2
;;
esac
done
require_binary() {
local name="$1"
if ! command -v "$name" >/dev/null 2>&1; then
err "Required binary missing: $name"
return 1
fi
}
check_software() {
require_binary node
require_binary npm
}
check_tool_dir() {
[[ -d "$TOOLS_DIR" ]] || { err "Tool dir not found: $TOOLS_DIR"; return 1; }
[[ -f "$TOOLS_DIR/package.json" ]] || { err "package.json not found in $TOOLS_DIR"; return 1; }
[[ -f "$TOOLS_DIR/launch.sh" ]] || { err "launch.sh not found in $TOOLS_DIR"; return 1; }
}
check_npm_deps() {
[[ -d "$TOOLS_DIR/node_modules/@modelcontextprotocol" ]] || return 1
[[ -d "$TOOLS_DIR/node_modules/@excalidraw" ]] || return 1
[[ -d "$TOOLS_DIR/node_modules/jsdom" ]] || return 1
}
install_npm_deps() {
if check_npm_deps; then
return 0
fi
log "Installing npm deps in $TOOLS_DIR..."
(cd "$TOOLS_DIR" && npm install --silent) || {
err "npm install failed in $TOOLS_DIR"
return 1
}
}
check_claude_config() {
python3 - <<'PY'
import json
from pathlib import Path
p = Path.home() / ".claude.json"
if not p.exists():
raise SystemExit(1)
try:
data = json.loads(p.read_text(encoding="utf-8"))
except Exception:
raise SystemExit(1)
mcp = data.get("mcpServers")
if not isinstance(mcp, dict):
raise SystemExit(1)
entry = mcp.get("excalidraw")
if not isinstance(entry, dict):
raise SystemExit(1)
cmd = entry.get("command", "")
if not cmd.endswith("launch.sh"):
raise SystemExit(1)
PY
}
apply_claude_config() {
require_binary claude
local launch_sh="$TOOLS_DIR/launch.sh"
claude mcp add --scope user excalidraw -- "$launch_sh"
}
# ── Check mode ────────────────────────────────────────────────────────────────
if [[ "$MODE" == "check" ]]; then
check_software
check_tool_dir
if ! check_npm_deps; then
err "npm deps not installed in $TOOLS_DIR (run without --check to install)"
exit 1
fi
if ! check_claude_config; then
err "excalidraw not registered in ~/.claude.json"
exit 1
fi
log "excalidraw MCP is configured and available"
exit 0
fi
# ── Apply mode ────────────────────────────────────────────────────────────────
check_software
check_tool_dir
install_npm_deps
apply_claude_config
log "excalidraw MCP configured (scope: $SCOPE)"