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/opencode/script/postinstall.mjs

@@ -0,0 +1,189 @@
+#!/usr/bin/env node
+
+import childProcess from "child_process"
+import fs from "fs"
+import os from "os"
+import path from "path"
+import { createRequire } from "module"
+import { fileURLToPath } from "url"
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
+const require = createRequire(import.meta.url)
+const packageJson = JSON.parse(fs.readFileSync(path.join(__dirname, "package.json"), "utf8"))
+
+const platformMap = {
+  darwin: "darwin",
+  linux: "linux",
+  win32: "windows",
+}
+const archMap = {
+  x64: "x64",
+  arm64: "arm64",
+  arm: "arm",
+}
+
+const platform = platformMap[os.platform()] ?? os.platform()
+const arch = archMap[os.arch()] ?? os.arch()
+const base = `opencode-${platform}-${arch}`
+const sourceBinary = platform === "windows" ? "opencode.exe" : "opencode"
+const targetBinary = path.join(__dirname, "bin", "opencode.exe")
+
+function supportsAvx2() {
+  if (arch !== "x64") return false
+
+  if (platform === "linux") {
+    try {
+      return /(^|\s)avx2(\s|$)/i.test(fs.readFileSync("/proc/cpuinfo", "utf8"))
+    } catch {
+      return false
+    }
+  }
+
+  if (platform === "darwin") {
+    try {
+      const result = childProcess.spawnSync("sysctl", ["-n", "hw.optional.avx2_0"], {
+        encoding: "utf8",
+        timeout: 1500,
+      })
+      if (result.status !== 0) return false
+      return (result.stdout || "").trim() === "1"
+    } catch {
+      return false
+    }
+  }
+
+  if (platform === "windows") {
+    const command =
+      '(Add-Type -MemberDefinition "[DllImport(""kernel32.dll"")] public static extern bool IsProcessorFeaturePresent(int ProcessorFeature);" -Name Kernel32 -Namespace Win32 -PassThru)::IsProcessorFeaturePresent(40)'
+
+    for (const executable of ["powershell.exe", "pwsh.exe", "pwsh", "powershell"]) {
+      try {
+        const result = childProcess.spawnSync(executable, ["-NoProfile", "-NonInteractive", "-Command", command], {
+          encoding: "utf8",
+          timeout: 3000,
+          windowsHide: true,
+        })
+        if (result.status !== 0) continue
+        const output = (result.stdout || "").trim().toLowerCase()
+        if (output === "true" || output === "1") return true
+        if (output === "false" || output === "0") return false
+      } catch {
+        continue
+      }
+    }
+  }
+
+  return false
+}
+
+function isMusl() {
+  if (platform !== "linux") return false
+
+  try {
+    if (fs.existsSync("/etc/alpine-release")) return true
+  } catch {
+    // Ignore filesystem probes that are blocked by the host.
+  }
+
+  try {
+    const result = childProcess.spawnSync("ldd", ["--version"], { encoding: "utf8" })
+    return `${result.stdout || ""}${result.stderr || ""}`.toLowerCase().includes("musl")
+  } catch {
+    return false
+  }
+}
+
+function packageNames() {
+  const baseline = arch === "x64" && !supportsAvx2()
+
+  if (platform === "linux") {
+    if (isMusl()) {
+      if (arch === "x64")
+        return baseline
+          ? [`${base}-baseline-musl`, `${base}-musl`, `${base}-baseline`, base]
+          : [`${base}-musl`, `${base}-baseline-musl`, base, `${base}-baseline`]
+      return [`${base}-musl`, base]
+    }
+
+    if (arch === "x64")
+      return baseline
+        ? [`${base}-baseline`, base, `${base}-baseline-musl`, `${base}-musl`]
+        : [base, `${base}-baseline`, `${base}-musl`, `${base}-baseline-musl`]
+    return [base, `${base}-musl`]
+  }
+
+  if (arch === "x64") return baseline ? [`${base}-baseline`, base] : [base, `${base}-baseline`]
+  return [base]
+}
+
+function resolveBinary(name) {
+  const packageJsonPath = require.resolve(`${name}/package.json`)
+  const binaryPath = path.join(path.dirname(packageJsonPath), "bin", sourceBinary)
+  if (!fs.existsSync(binaryPath)) throw new Error(`Binary not found at ${binaryPath}`)
+  return binaryPath
+}
+
+function installPackage(name) {
+  const version = packageJson.optionalDependencies?.[name]
+  if (!version) return
+
+  const temp = fs.mkdtempSync(path.join(os.tmpdir(), "opencode-install-"))
+  try {
+    const result = childProcess.spawnSync(
+      "npm",
+      ["install", "--ignore-scripts", "--no-save", "--loglevel=error", "--prefix", temp, `${name}@${version}`],
+      { stdio: "inherit", windowsHide: true },
+    )
+    if (result.status !== 0) return
+    const packageDir = path.join(temp, "node_modules", name)
+    copyBinary(path.join(packageDir, "bin", sourceBinary), targetBinary)
+    return true
+  } finally {
+    fs.rmSync(temp, { recursive: true, force: true })
+  }
+}
+
+function copyBinary(source, target) {
+  if (!fs.existsSync(source)) throw new Error(`Binary not found at ${source}`)
+  fs.mkdirSync(path.dirname(target), { recursive: true })
+  if (fs.existsSync(target)) fs.unlinkSync(target)
+  try {
+    fs.linkSync(source, target)
+  } catch {
+    fs.copyFileSync(source, target)
+  }
+  fs.chmodSync(target, 0o755)
+}
+
+function verifyBinary() {
+  const result = childProcess.spawnSync(targetBinary, ["--version"], {
+    encoding: "utf8",
+    stdio: "ignore",
+    windowsHide: true,
+  })
+  return result.status === 0
+}
+
+function main() {
+  for (const name of packageNames()) {
+    try {
+      copyBinary(resolveBinary(name), targetBinary)
+      if (verifyBinary()) return
+    } catch {
+      if (installPackage(name) && verifyBinary()) return
+    }
+  }
+
+  throw new Error(
+    `It seems your package manager failed to install the right opencode CLI package. Try manually installing ${packageNames()
+      .map((name) => JSON.stringify(name))
+      .join(" or ")}.`,
+  )
+}
+
+try {
+  main()
+} catch (error) {
+  console.error(error.message)
+  process.exit(1)
+}