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/

script/version.ts

@@ -0,0 +1,36 @@
+#!/usr/bin/env bun
+
+import { Script } from "@opencode-ai/script"
+import { $ } from "bun"
+
+const output = [`version=${Script.version}`]
+const sha = process.env.GITHUB_SHA ?? (await $`git rev-parse HEAD`.text()).trim()
+
+if (!Script.preview) {
+  await $`bun script/changelog.ts --to ${sha}`.cwd(process.cwd())
+  const file = `${process.cwd()}/UPCOMING_CHANGELOG.md`
+  const body = await Bun.file(file)
+    .text()
+    .catch(() => "No notable changes")
+  const dir = process.env.RUNNER_TEMP ?? "/tmp"
+  const notesFile = `${dir}/opencode-release-notes.txt`
+  await Bun.write(notesFile, body)
+  await $`gh release create v${Script.version} -d --target ${sha} --title "v${Script.version}" --notes-file ${notesFile}`
+  const release = await $`gh release view v${Script.version} --json tagName,databaseId`.json()
+  output.push(`release=${release.databaseId}`)
+  output.push(`tag=${release.tagName}`)
+} else if (Script.channel === "beta") {
+  await $`gh release create v${Script.version} -d --title "v${Script.version}" --repo ${process.env.GH_REPO}`
+  const release =
+    await $`gh release view v${Script.version} --json tagName,databaseId --repo ${process.env.GH_REPO}`.json()
+  output.push(`release=${release.databaseId}`)
+  output.push(`tag=${release.tagName}`)
+}
+
+output.push(`repo=${process.env.GH_REPO}`)
+
+if (process.env.GITHUB_OUTPUT) {
+  await Bun.write(process.env.GITHUB_OUTPUT, output.join("\n"))
+}
+
+process.exit(0)