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/

.opencode/tool/github-triage.ts

@@ -0,0 +1,60 @@
+/// <reference path="../env.d.ts" />
+import { tool } from "@opencode-ai/plugin"
+
+const TEAM = {
+  tui: ["kommander", "simonklee"],
+  desktop_web: ["Hona", "Brendonovich"],
+  core: ["jlongster", "rekram1-node", "nexxeln", "kitlangton", "starptech"],
+  inference: ["fwang", "MrMushrooooom", "starptech"],
+  windows: ["Hona"],
+} as const
+
+function pick<T>(items: readonly T[]) {
+  return items[Math.floor(Math.random() * items.length)]!
+}
+
+function getIssueNumber(): number {
+  const issue = parseInt(process.env.ISSUE_NUMBER ?? "", 10)
+  if (!issue) throw new Error("ISSUE_NUMBER env var not set")
+  return issue
+}
+
+async function githubFetch(endpoint: string, options: RequestInit = {}) {
+  const response = await fetch(`https://api.github.com${endpoint}`, {
+    ...options,
+    headers: {
+      Authorization: `Bearer ${process.env.GITHUB_TOKEN}`,
+      Accept: "application/vnd.github+json",
+      "Content-Type": "application/json",
+      ...(options.headers instanceof Headers ? Object.fromEntries(options.headers.entries()) : options.headers),
+    },
+  })
+  if (!response.ok) {
+    throw new Error(`GitHub API error: ${response.status} ${response.statusText}`)
+  }
+  return response.json()
+}
+
+export default tool({
+  description: `Use this tool to assign a GitHub issue.
+
+Provide the team that should own the issue. This tool picks a random assignee from that team and does not apply labels.`,
+  args: {
+    team: tool.schema
+      .enum(Object.keys(TEAM) as [keyof typeof TEAM, ...(keyof typeof TEAM)[]])
+      .describe("The owning team"),
+  },
+  async execute(args) {
+    const issue = getIssueNumber()
+    const owner = "anomalyco"
+    const repo = "opencode"
+    const assignee = pick(TEAM[args.team])
+
+    await githubFetch(`/repos/${owner}/${repo}/issues/${issue}/assignees`, {
+      method: "POST",
+      body: JSON.stringify({ assignees: [assignee] }),
+    })
+
+    return `Assigned @${assignee} from ${args.team} to issue #${issue}`
+  },
+})