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
- V1 requirements: C4 docs, ADR, AGENTS.md, debug-log.md
- Design documents in docs/

packages/opencode/test/agent/plugin-agent-regression.test.ts

@@ -0,0 +1,64 @@
+import { expect } from "bun:test"
+import { FSUtil } from "@opencode-ai/core/fs-util"
+import { LocationServiceMap } from "@opencode-ai/core/location-layer"
+import { Effect, Layer } from "effect"
+import { FetchHttpClient } from "effect/unstable/http"
+import path from "path"
+import { pathToFileURL } from "url"
+import { Agent } from "../../src/agent/agent"
+import { EventV2Bridge } from "../../src/event-v2-bridge"
+import { Config } from "../../src/config/config"
+import { Env } from "../../src/env"
+import { RuntimeFlags } from "../../src/effect/runtime-flags"
+import { Plugin } from "../../src/plugin"
+import { AccountTest } from "../fake/account"
+import { AuthTest } from "../fake/auth"
+import { NpmTest } from "../fake/npm"
+import { ProviderTest } from "../fake/provider"
+import { SkillTest } from "../fake/skill"
+import { testEffect } from "../lib/effect"
+import { PLUGIN_AGENT } from "../fixture/agent-plugin.constants"
+
+// `it.instance` skips InstanceBootstrap so LSP / MCP don't spin up — those
+// services hang during scope teardown on Windows and aren't needed
+// to verify plugin → config hook → Agent.list.
+const pluginUrl = pathToFileURL(path.join(import.meta.dir, "..", "fixture", "agent-plugin.ts")).href
+
+const provider = ProviderTest.fake()
+const configLayer = Config.layer.pipe(
+  Layer.provide(FSUtil.defaultLayer),
+  Layer.provide(Env.defaultLayer),
+  Layer.provide(AuthTest.empty),
+  Layer.provide(AccountTest.empty),
+  Layer.provide(NpmTest.noop),
+  Layer.provide(FetchHttpClient.layer),
+)
+const pluginLayer = Plugin.layer.pipe(
+  Layer.provide(EventV2Bridge.defaultLayer),
+  Layer.provide(configLayer),
+  Layer.provide(RuntimeFlags.layer({ disableDefaultPlugins: true })),
+)
+const agentLayer = Agent.layer.pipe(
+  Layer.provide(configLayer),
+  Layer.provide(AuthTest.empty),
+  Layer.provide(SkillTest.empty),
+  Layer.provide(provider.layer),
+  Layer.provide(pluginLayer),
+  Layer.provide(LocationServiceMap.layer),
+  Layer.provide(RuntimeFlags.layer({ disableDefaultPlugins: true })),
+)
+
+const it = testEffect(Layer.mergeAll(agentLayer, pluginLayer))
+
+it.instance(
+  "plugin-registered agents appear in Agent.list",
+  () =>
+    Effect.gen(function* () {
+      yield* Plugin.Service.use((p) => p.init())
+      const agents = yield* Agent.use.list()
+      const added = agents.find((agent) => agent.name === PLUGIN_AGENT.name)
+      expect(added?.description).toBe(PLUGIN_AGENT.description)
+      expect(added?.mode).toBe(PLUGIN_AGENT.mode)
+    }),
+  { config: { plugin: [pluginUrl] } },
+)