chore: initial scaffolding for SynthesisAgent.ClaudePlugin

Stdio MCP server registered as a Claude Code --channels source. Receives
inbound events from SynthesisAgent.OpenclawPlugin and emits
notifications/claude/channel to push them into the running Claude turn loop.
Forwards tools/call requests back to OpenClaw for execution.

Capability declaration uses experimental.claude/channel — required nesting
discovered 2026-05-14 against the official Anthropic discord plugin source.

package.json

@@ -0,0 +1,18 @@
+{
+  "name": "synthesis-claude-plugin",
+  "version": "0.0.1",
+  "license": "Apache-2.0",
+  "type": "module",
+  "bin": "./server.ts",
+  "scripts": {
+    "start": "bun install --no-summary && bun server.ts"
+  },
+  "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.0.0",
+    "ws": "^8.18.0",
+    "zod": "^3.23.0"
+  },
+  "devDependencies": {
+    "@types/ws": "^8.5.10"
+  }
+}