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/tui/test/plugin/runtime.test.ts

@@ -0,0 +1,50 @@
+import { expect, test } from "bun:test"
+import { createPluginRuntime } from "../../src/plugin/runtime"
+
+test("routes use the latest registration and restore previous registrations", () => {
+  const runtime = createPluginRuntime()
+  const first = () => "first"
+  const second = () => "second"
+  runtime.routes.register([{ name: "demo", render: first }])
+  const dispose = runtime.routes.register([{ name: "demo", render: second }])
+
+  expect(runtime.routes.get("demo")).toBe(second)
+  dispose()
+  expect(runtime.routes.get("demo")).toBe(first)
+})
+
+test("facade publishes and clears presentation state", async () => {
+  const runtime = createPluginRuntime()
+  runtime.update({
+    commands: {
+      async activate() {
+        return true
+      },
+      async deactivate() {
+        return true
+      },
+      async add() {
+        return true
+      },
+      async install() {
+        return { ok: true, dir: "/tmp", tui: true }
+      },
+    },
+    status: [
+      {
+        id: "demo",
+        source: "internal",
+        spec: "demo",
+        target: "demo",
+        enabled: true,
+        active: true,
+      },
+    ],
+  })
+
+  expect(await runtime.commands().activate("demo")).toBe(true)
+  expect(runtime.status()).toHaveLength(1)
+  runtime.clear()
+  expect(await runtime.commands().activate("demo")).toBe(false)
+  expect(runtime.status()).toEqual([])
+})