Initial commit: Microsoft To Do for Claude (skill + .mcpb extension)

Claude Code skill (CLI over Microsoft Graph, delegated auth-code + PKCE) and a
Claude Desktop .mcpb extension sharing one dependency-free core client.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

mcp-extension/scripts/sync-core.mjs

@@ -0,0 +1,16 @@
+#!/usr/bin/env node
+// Copy the canonical core client into the extension so the bundle is
+// self-contained. The single source of truth lives in the skill; this keeps the
+// extension's copy (server/lib/graph.mjs) in sync. Run before packing.
+
+import { copyFileSync, mkdirSync } from "node:fs";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const here = dirname(fileURLToPath(import.meta.url));
+const src = join(here, "..", "..", ".claude", "skills", "ms-todo", "scripts", "lib", "graph.mjs");
+const dest = join(here, "..", "server", "lib", "graph.mjs");
+
+mkdirSync(dirname(dest), { recursive: true });
+copyFileSync(src, dest);
+console.log(`Synced core client:\n  ${src}\n  -> ${dest}`);