feat(aircoding): AirCoding V2 baseline — deterministic multi-agent architecture

Forked from OpenCode v1.17.4 with multi-agent system:
- 5 agents: aircoding, scheduler, worker, architect, reviewer
- Deterministic DAG scheduling engine (coordinator_tick)
- Tool whitelists as hard enforcement
- AirCoding validation plugin
- System prompt injection for routing
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

packages/sdk/js/src/index.ts

@@ -0,0 +1,21 @@
+export * from "./client.js"
+export * from "./server.js"
+
+import { createOpencodeClient } from "./client.js"
+import { createOpencodeServer } from "./server.js"
+import type { ServerOptions } from "./server.js"
+
+export async function createOpencode(options?: ServerOptions) {
+  const server = await createOpencodeServer({
+    ...options,
+  })
+
+  const client = createOpencodeClient({
+    baseUrl: server.url,
+  })
+
+  return {
+    client,
+    server,
+  }
+}