desktop: add electron version (#15663)

13 files changed, 1611 insertions, 0 deletions

diff --git a/packages/desktop-electron/src/main/apps.ts b/packages/desktop-electron/src/main/apps.ts
new file mode 100644
index 000000000..2b4603789
--- /dev/null
+++ b/packages/desktop-electron/src/main/apps.ts
@@ -0,0 +1,148 @@
+import { execFileSync } from "node:child_process"
+import { existsSync, readFileSync, readdirSync } from "node:fs"
+import { dirname, extname, join } from "node:path"
+
+export function checkAppExists(appName: string): boolean {
+  if (process.platform === "win32") return true
+  if (process.platform === "linux") return true
+  return checkMacosApp(appName)
+}
+
+export function resolveAppPath(appName: string): string | null {
+  if (process.platform !== "win32") return appName
+  return resolveWindowsAppPath(appName)
+}
+
+export function wslPath(path: string, mode: "windows" | "linux" | null): string {
+  if (process.platform !== "win32") return path
+
+  const flag = mode === "windows" ? "-w" : "-u"
+  try {
+    if (path.startsWith("~")) {
+      const suffix = path.slice(1)
+      const cmd = `wslpath ${flag} \"$HOME${suffix.replace(/\"/g, '\\"')}\"`
+      const output = execFileSync("wsl", ["-e", "sh", "-lc", cmd])
+      return output.toString().trim()
+    }
+
+    const output = execFileSync("wsl", ["-e", "wslpath", flag, path])
+    return output.toString().trim()
+  } catch (error) {
+    throw new Error(`Failed to run wslpath: ${String(error)}`)
+  }
+}
+
+function checkMacosApp(appName: string) {
+  const locations = [`/Applications/${appName}.app`, `/System/Applications/${appName}.app`]
+
+  const home = process.env.HOME
+  if (home) locations.push(`${home}/Applications/${appName}.app`)
+
+  if (locations.some((location) => existsSync(location))) return true
+
+  try {
+    execFileSync("which", [appName])
+    return true
+  } catch {
+    return false
+  }
+}
+
+function resolveWindowsAppPath(appName: string): string | null {
+  let output: string
+  try {
+    output = execFileSync("where", [appName]).toString()
+  } catch {
+    return null
+  }
+
+  const paths = output
+    .split(/\r?\n/)
+    .map((line) => line.trim())
+    .filter((line) => line.length > 0)
+
+  const hasExt = (path: string, ext: string) => extname(path).toLowerCase() === `.${ext}`
+
+  const exe = paths.find((path) => hasExt(path, "exe"))
+  if (exe) return exe
+
+  const resolveCmd = (path: string) => {
+    const content = readFileSync(path, "utf8")
+    for (const token of content.split('"').map((value: string) => value.trim())) {
+      const lower = token.toLowerCase()
+      if (!lower.includes(".exe")) continue
+
+      const index = lower.indexOf("%~dp0")
+      if (index >= 0) {
+        const base = dirname(path)
+        const suffix = token.slice(index + 5)
+        const resolved = suffix
+          .replace(/\//g, "\\")
+          .split("\\")
+          .filter((part: string) => part && part !== ".")
+          .reduce((current: string, part: string) => {
+            if (part === "..") return dirname(current)
+            return join(current, part)
+          }, base)
+
+        if (existsSync(resolved)) return resolved
+      }
+
+      if (existsSync(token)) return token
+    }
+
+    return null
+  }
+
+  for (const path of paths) {
+    if (hasExt(path, "cmd") || hasExt(path, "bat")) {
+      const resolved = resolveCmd(path)
+      if (resolved) return resolved
+    }
+
+    if (!extname(path)) {
+      const cmd = `${path}.cmd`
+      if (existsSync(cmd)) {
+        const resolved = resolveCmd(cmd)
+        if (resolved) return resolved
+      }
+
+      const bat = `${path}.bat`
+      if (existsSync(bat)) {
+        const resolved = resolveCmd(bat)
+        if (resolved) return resolved
+      }
+    }
+  }
+
+  const key = appName
+    .split("")
+    .filter((value: string) => /[a-z0-9]/i.test(value))
+    .map((value: string) => value.toLowerCase())
+    .join("")
+
+  if (key) {
+    for (const path of paths) {
+      const dirs = [dirname(path), dirname(dirname(path)), dirname(dirname(dirname(path)))]
+      for (const dir of dirs) {
+        try {
+          for (const entry of readdirSync(dir)) {
+            const candidate = join(dir, entry)
+            if (!hasExt(candidate, "exe")) continue
+            const stem = entry.replace(/\.exe$/i, "")
+            const name = stem
+              .split("")
+              .filter((value: string) => /[a-z0-9]/i.test(value))
+              .map((value: string) => value.toLowerCase())
+              .join("")
+            if (name.includes(key) || key.includes(name)) return candidate
+          }
+        } catch {
+          continue
+        }
+      }
+    }
+  }
+
+  return paths[0] ?? null
+}
diff --git a/packages/desktop-electron/src/main/cli.ts b/packages/desktop-electron/src/main/cli.ts
new file mode 100644
index 000000000..e338d3913
--- /dev/null
+++ b/packages/desktop-electron/src/main/cli.ts
@@ -0,0 +1,279 @@
+import { execFileSync, spawn } from "node:child_process"
+import { EventEmitter } from "node:events"
+import { chmodSync, readFileSync, unlinkSync, writeFileSync } from "node:fs"
+import { tmpdir } from "node:os"
+import { dirname, join } from "node:path"
+import readline from "node:readline"
+import { fileURLToPath } from "node:url"
+import { app } from "electron"
+import treeKill from "tree-kill"
+
+import { WSL_ENABLED_KEY } from "./constants"
+import { store } from "./store"
+
+const CLI_INSTALL_DIR = ".opencode/bin"
+const CLI_BINARY_NAME = "opencode"
+
+export type ServerConfig = {
+  hostname?: string
+  port?: number
+}
+
+export type Config = {
+  server?: ServerConfig
+}
+
+export type TerminatedPayload = { code: number | null; signal: number | null }
+
+export type CommandEvent =
+  | { type: "stdout"; value: string }
+  | { type: "stderr"; value: string }
+  | { type: "error"; value: string }
+  | { type: "terminated"; value: TerminatedPayload }
+  | { type: "sqlite"; value: SqliteMigrationProgress }
+
+export type SqliteMigrationProgress = { type: "InProgress"; value: number } | { type: "Done" }
+
+export type CommandChild = {
+  kill: () => void
+}
+
+const root = dirname(fileURLToPath(import.meta.url))
+
+export function getSidecarPath() {
+  const suffix = process.platform === "win32" ? ".exe" : ""
+  const path = app.isPackaged
+    ? join(process.resourcesPath, `opencode-cli${suffix}`)
+    : join(root, "../../resources", `opencode-cli${suffix}`)
+  console.log(`[cli] Sidecar path resolved: ${path} (isPackaged: ${app.isPackaged})`)
+  return path
+}
+
+export async function getConfig(): Promise<Config | null> {
+  const { events } = spawnCommand("debug config", {})
+  let output = ""
+
+  await new Promise<void>((resolve) => {
+    events.on("stdout", (line: string) => {
+      output += line
+    })
+    events.on("stderr", (line: string) => {
+      output += line
+    })
+    events.on("terminated", () => resolve())
+    events.on("error", () => resolve())
+  })
+
+  try {
+    return JSON.parse(output) as Config
+  } catch {
+    return null
+  }
+}
+
+export async function installCli(): Promise<string> {
+  if (process.platform === "win32") {
+    throw new Error("CLI installation is only supported on macOS & Linux")
+  }
+
+  const sidecar = getSidecarPath()
+  const scriptPath = join(app.getAppPath(), "install")
+  const script = readFileSync(scriptPath, "utf8")
+  const tempScript = join(tmpdir(), "opencode-install.sh")
+
+  writeFileSync(tempScript, script, "utf8")
+  chmodSync(tempScript, 0o755)
+
+  const cmd = spawn(tempScript, ["--binary", sidecar], { stdio: "pipe" })
+  return await new Promise<string>((resolve, reject) => {
+    cmd.on("exit", (code: number | null) => {
+      try {
+        unlinkSync(tempScript)
+      } catch {}
+      if (code === 0) {
+        const installPath = getCliInstallPath()
+        if (installPath) return resolve(installPath)
+        return reject(new Error("Could not determine install path"))
+      }
+      reject(new Error("Install script failed"))
+    })
+  })
+}
+
+export function syncCli() {
+  if (!app.isPackaged) return
+  const installPath = getCliInstallPath()
+  if (!installPath) return
+
+  let version = ""
+  try {
+    version = execFileSync(installPath, ["--version"]).toString().trim()
+  } catch {
+    return
+  }
+
+  const cli = parseVersion(version)
+  const appVersion = parseVersion(app.getVersion())
+  if (!cli || !appVersion) return
+  if (compareVersions(cli, appVersion) >= 0) return
+  void installCli().catch(() => undefined)
+}
+
+export function serve(hostname: string, port: number, password: string) {
+  const args = `--print-logs --log-level WARN serve --hostname ${hostname} --port ${port}`
+  const env = {
+    OPENCODE_SERVER_USERNAME: "opencode",
+    OPENCODE_SERVER_PASSWORD: password,
+  }
+
+  return spawnCommand(args, env)
+}
+
+export function spawnCommand(args: string, extraEnv: Record<string, string>) {
+  console.log(`[cli] Spawning command with args: ${args}`)
+  const base = Object.fromEntries(
+    Object.entries(process.env).filter((entry): entry is [string, string] => typeof entry[1] === "string"),
+  )
+  const envs = {
+    ...base,
+    OPENCODE_EXPERIMENTAL_ICON_DISCOVERY: "true",
+    OPENCODE_EXPERIMENTAL_FILEWATCHER: "true",
+    OPENCODE_CLIENT: "desktop",
+    XDG_STATE_HOME: app.getPath("userData"),
+    ...extraEnv,
+  }
+
+  const { cmd, cmdArgs } = buildCommand(args, envs)
+  console.log(`[cli] Executing: ${cmd} ${cmdArgs.join(" ")}`)
+  const child = spawn(cmd, cmdArgs, {
+    env: envs,
+    detached: true,
+    windowsHide: true,
+    stdio: ["ignore", "pipe", "pipe"],
+  })
+  console.log(`[cli] Spawned process with PID: ${child.pid}`)
+
+  const events = new EventEmitter()
+  const exit = new Promise<TerminatedPayload>((resolve) => {
+    child.on("exit", (code: number | null, signal: NodeJS.Signals | null) => {
+      console.log(`[cli] Process exited with code: ${code}, signal: ${signal}`)
+      resolve({ code: code ?? null, signal: null })
+    })
+    child.on("error", (error: Error) => {
+      console.error(`[cli] Process error: ${error.message}`)
+      events.emit("error", error.message)
+    })
+  })
+
+  const stdout = child.stdout
+  const stderr = child.stderr
+
+  if (stdout) {
+    readline.createInterface({ input: stdout }).on("line", (line: string) => {
+      if (handleSqliteProgress(events, line)) return
+      events.emit("stdout", `${line}\n`)
+    })
+  }
+
+  if (stderr) {
+    readline.createInterface({ input: stderr }).on("line", (line: string) => {
+      if (handleSqliteProgress(events, line)) return
+      events.emit("stderr", `${line}\n`)
+    })
+  }
+
+  exit.then((payload) => {
+    events.emit("terminated", payload)
+  })
+
+  const kill = () => {
+    if (!child.pid) return
+    treeKill(child.pid)
+  }
+
+  return { events, child: { kill }, exit }
+}
+
+function handleSqliteProgress(events: EventEmitter, line: string) {
+  const stripped = line.startsWith("sqlite-migration:") ? line.slice("sqlite-migration:".length).trim() : null
+  if (!stripped) return false
+  if (stripped === "done") {
+    events.emit("sqlite", { type: "Done" })
+    return true
+  }
+  const value = Number.parseInt(stripped, 10)
+  if (!Number.isNaN(value)) {
+    events.emit("sqlite", { type: "InProgress", value })
+    return true
+  }
+  return false
+}
+
+function buildCommand(args: string, env: Record<string, string>) {
+  if (process.platform === "win32" && isWslEnabled()) {
+    console.log(`[cli] Using WSL mode`)
+    const version = app.getVersion()
+    const script = [
+      "set -e",
+      'BIN="$HOME/.opencode/bin/opencode"',
+      'if [ ! -x "$BIN" ]; then',
+      `  curl -fsSL https://opencode.ai/install | bash -s -- --version ${shellEscape(version)} --no-modify-path`,
+      "fi",
+      `${envPrefix(env)} exec "$BIN" ${args}`,
+    ].join("\n")
+
+    return { cmd: "wsl", cmdArgs: ["-e", "bash", "-lc", script] }
+  }
+
+  if (process.platform === "win32") {
+    const sidecar = getSidecarPath()
+    console.log(`[cli] Windows direct mode, sidecar: ${sidecar}`)
+    return { cmd: sidecar, cmdArgs: args.split(" ") }
+  }
+
+  const sidecar = getSidecarPath()
+  const shell = process.env.SHELL || "/bin/sh"
+  const line = shell.endsWith("/nu") ? `^\"${sidecar}\" ${args}` : `\"${sidecar}\" ${args}`
+  console.log(`[cli] Unix mode, shell: ${shell}, command: ${line}`)
+  return { cmd: shell, cmdArgs: ["-l", "-c", line] }
+}
+
+function envPrefix(env: Record<string, string>) {
+  const entries = Object.entries(env).map(([key, value]) => `${key}=${shellEscape(value)}`)
+  return entries.join(" ")
+}
+
+function shellEscape(input: string) {
+  if (!input) return "''"
+  return `'${input.replace(/'/g, `'"'"'`)}'`
+}
+
+function getCliInstallPath() {
+  const home = process.env.HOME
+  if (!home) return null
+  return join(home, CLI_INSTALL_DIR, CLI_BINARY_NAME)
+}
+
+function isWslEnabled() {
+  return store.get(WSL_ENABLED_KEY) === true
+}
+
+function parseVersion(value: string) {
+  const parts = value
+    .replace(/^v/, "")
+    .split(".")
+    .map((part) => Number.parseInt(part, 10))
+  if (parts.some((part) => Number.isNaN(part))) return null
+  return parts
+}
+
+function compareVersions(a: number[], b: number[]) {
+  const len = Math.max(a.length, b.length)
+  for (let i = 0; i < len; i += 1) {
+    const left = a[i] ?? 0
+    const right = b[i] ?? 0
+    if (left > right) return 1
+    if (left < right) return -1
+  }
+  return 0
+}
diff --git a/packages/desktop-electron/src/main/constants.ts b/packages/desktop-electron/src/main/constants.ts
new file mode 100644
index 000000000..1e21661c1
--- /dev/null
+++ b/packages/desktop-electron/src/main/constants.ts
@@ -0,0 +1,10 @@
+import { app } from "electron"
+
+type Channel = "dev" | "beta" | "prod"
+const raw = import.meta.env.OPENCODE_CHANNEL
+export const CHANNEL: Channel = raw === "dev" || raw === "beta" || raw === "prod" ? raw : "dev"
+
+export const SETTINGS_STORE = "opencode.settings"
+export const DEFAULT_SERVER_URL_KEY = "defaultServerUrl"
+export const WSL_ENABLED_KEY = "wslEnabled"
+export const UPDATER_ENABLED = app.isPackaged && CHANNEL !== "dev"
diff --git a/packages/desktop-electron/src/main/env.d.ts b/packages/desktop-electron/src/main/env.d.ts
new file mode 100644
index 000000000..0ee0c551d
--- /dev/null
+++ b/packages/desktop-electron/src/main/env.d.ts
@@ -0,0 +1,7 @@
+interface ImportMetaEnv {
+  readonly OPENCODE_CHANNEL: string
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv
+}
diff --git a/packages/desktop-electron/src/main/index.ts b/packages/desktop-electron/src/main/index.ts
new file mode 100644
index 000000000..03c1e128e
--- /dev/null
+++ b/packages/desktop-electron/src/main/index.ts
@@ -0,0 +1,449 @@
+import { app, BrowserWindow, dialog } from "electron"
+import type { Event } from "electron"
+import pkg from "electron-updater"
+import { randomUUID } from "node:crypto"
+import { EventEmitter } from "node:events"
+import { existsSync } from "node:fs"
+import { homedir } from "node:os"
+import { join } from "node:path"
+import { createServer } from "node:net"
+
+const APP_NAMES: Record<string, string> = { dev: "OpenCode Dev", beta: "OpenCode Beta", prod: "OpenCode" }
+const APP_IDS: Record<string, string> = {
+  dev: "ai.opencode.desktop.dev",
+  beta: "ai.opencode.desktop.beta",
+  prod: "ai.opencode.desktop",
+}
+app.setName(app.isPackaged ? APP_NAMES[CHANNEL] : "OpenCode Dev")
+app.setPath("userData", join(app.getPath("appData"), app.isPackaged ? APP_IDS[CHANNEL] : "ai.opencode.desktop.dev"))
+const { autoUpdater } = pkg
+
+import { checkAppExists, resolveAppPath, wslPath } from "./apps"
+import { installCli, syncCli } from "./cli"
+import { CHANNEL, UPDATER_ENABLED } from "./constants"
+import { registerIpcHandlers, sendDeepLinks, sendMenuCommand, sendSqliteMigrationProgress } from "./ipc"
+import { initLogging } from "./logging"
+import { parseMarkdown } from "./markdown"
+import { createMenu } from "./menu"
+import {
+  checkHealth,
+  checkHealthOrAskRetry,
+  getDefaultServerUrl,
+  getSavedServerUrl,
+  getWslConfig,
+  setDefaultServerUrl,
+  setWslConfig,
+  spawnLocalServer,
+} from "./server"
+import { createLoadingWindow, createMainWindow, setDockIcon } from "./windows"
+
+import type { InitStep, ServerReadyData, SqliteMigrationProgress, WslConfig } from "../preload/types"
+import type { CommandChild } from "./cli"
+
+type ServerConnection =
+  | { variant: "existing"; url: string }
+  | {
+      variant: "cli"
+      url: string
+      password: null | string
+      health: {
+        wait: Promise<void>
+      }
+      events: any
+    }
+
+const initEmitter = new EventEmitter()
+let initStep: InitStep = { phase: "server_waiting" }
+
+let mainWindow: BrowserWindow | null = null
+let loadingWindow: BrowserWindow | null = null
+let sidecar: CommandChild | null = null
+let loadingComplete = defer<void>()
+
+const pendingDeepLinks: string[] = []
+
+const serverReady = defer<ServerReadyData>()
+const logger = initLogging()
+
+logger.log("app starting", { version: app.getVersion(), packaged: app.isPackaged })
+
+setupApp()
+
+function setupApp() {
+  ensureLoopbackNoProxy()
+  app.commandLine.appendSwitch("proxy-bypass-list", "<-loopback>")
+
+  if (!app.requestSingleInstanceLock()) {
+    app.quit()
+    return
+  }
+
+  app.on("second-instance", (_event: Event, argv: string[]) => {
+    const urls = argv.filter((arg: string) => arg.startsWith("opencode://"))
+    if (urls.length) {
+      logger.log("deep link received via second-instance", { urls })
+      emitDeepLinks(urls)
+    }
+    focusMainWindow()
+  })
+
+  app.on("open-url", (event: Event, url: string) => {
+    event.preventDefault()
+    logger.log("deep link received via open-url", { url })
+    emitDeepLinks([url])
+  })
+
+  app.on("before-quit", () => {
+    killSidecar()
+  })
+
+  void app.whenReady().then(async () => {
+    // migrate()
+    app.setAsDefaultProtocolClient("opencode")
+    setDockIcon()
+    setupAutoUpdater()
+    syncCli()
+    await initialize()
+  })
+}
+
+function emitDeepLinks(urls: string[]) {
+  if (urls.length === 0) return
+  pendingDeepLinks.push(...urls)
+  if (mainWindow) sendDeepLinks(mainWindow, urls)
+}
+
+function focusMainWindow() {
+  if (!mainWindow) return
+  mainWindow.show()
+  mainWindow.focus()
+}
+
+function setInitStep(step: InitStep) {
+  initStep = step
+  logger.log("init step", { step })
+  initEmitter.emit("step", step)
+}
+
+async function setupServerConnection(): Promise<ServerConnection> {
+  const customUrl = await getSavedServerUrl()
+
+  if (customUrl && (await checkHealthOrAskRetry(customUrl))) {
+    serverReady.resolve({ url: customUrl, password: null })
+    return { variant: "existing", url: customUrl }
+  }
+
+  const port = await getSidecarPort()
+  const hostname = "127.0.0.1"
+  const localUrl = `http://${hostname}:${port}`
+
+  if (await checkHealth(localUrl)) {
+    serverReady.resolve({ url: localUrl, password: null })
+    return { variant: "existing", url: localUrl }
+  }
+
+  const password = randomUUID()
+  const { child, health, events } = spawnLocalServer(hostname, port, password)
+  sidecar = child
+
+  return {
+    variant: "cli",
+    url: localUrl,
+    password,
+    health,
+    events,
+  }
+}
+
+async function initialize() {
+  const needsMigration = !sqliteFileExists()
+  const sqliteDone = needsMigration ? defer<void>() : undefined
+
+  const loadingTask = (async () => {
+    logger.log("setting up server connection")
+    const serverConnection = await setupServerConnection()
+    logger.log("server connection ready", { variant: serverConnection.variant, url: serverConnection.url })
+
+    const cliHealthCheck = (() => {
+      if (serverConnection.variant == "cli") {
+        return async () => {
+          const { events, health } = serverConnection
+          events.on("sqlite", (progress: SqliteMigrationProgress) => {
+            setInitStep({ phase: "sqlite_waiting" })
+            if (loadingWindow) sendSqliteMigrationProgress(loadingWindow, progress)
+            if (mainWindow) sendSqliteMigrationProgress(mainWindow, progress)
+            if (progress.type === "Done") sqliteDone?.resolve()
+          })
+          await health.wait
+          serverReady.resolve({ url: serverConnection.url, password: serverConnection.password })
+        }
+      } else {
+        serverReady.resolve({ url: serverConnection.url, password: null })
+        return null
+      }
+    })()
+
+    logger.log("server connection started")
+
+    if (cliHealthCheck) {
+      if (needsMigration) await sqliteDone?.promise
+      cliHealthCheck?.()
+    }
+
+    logger.log("loading task finished")
+  })()
+
+  const globals = {
+    updaterEnabled: UPDATER_ENABLED,
+    wsl: getWslConfig().enabled,
+    deepLinks: pendingDeepLinks,
+  }
+
+  const loadingWindow = await (async () => {
+    if (needsMigration /** TOOD: 1 second timeout */) {
+      // showLoading = await Promise.race([init.then(() => false).catch(() => false), delay(1000).then(() => true)])
+      const loadingWindow = createLoadingWindow(globals)
+      await delay(1000)
+      return loadingWindow
+    } else {
+      logger.log("showing main window without loading window")
+      mainWindow = createMainWindow(globals)
+      wireMenu()
+    }
+  })()
+
+  await loadingTask
+  setInitStep({ phase: "done" })
+
+  if (loadingWindow) {
+    await loadingComplete.promise
+  }
+
+  if (!mainWindow) {
+    mainWindow = createMainWindow(globals)
+    wireMenu()
+  }
+
+  loadingWindow?.close()
+}
+
+function wireMenu() {
+  if (!mainWindow) return
+  createMenu({
+    trigger: (id) => mainWindow && sendMenuCommand(mainWindow, id),
+    installCli: () => {
+      void installCli()
+    },
+    checkForUpdates: () => {
+      void checkForUpdates(true)
+    },
+    reload: () => mainWindow?.reload(),
+    relaunch: () => {
+      killSidecar()
+      app.relaunch()
+      app.exit(0)
+    },
+  })
+}
+
+registerIpcHandlers({
+  killSidecar: () => killSidecar(),
+  installCli: async () => installCli(),
+  awaitInitialization: async (sendStep) => {
+    sendStep(initStep)
+    const listener = (step: InitStep) => sendStep(step)
+    initEmitter.on("step", listener)
+    try {
+      logger.log("awaiting server ready")
+      const res = await serverReady.promise
+      logger.log("server ready", { url: res.url })
+      return res
+    } finally {
+      initEmitter.off("step", listener)
+    }
+  },
+  getDefaultServerUrl: () => getDefaultServerUrl(),
+  setDefaultServerUrl: (url) => setDefaultServerUrl(url),
+  getWslConfig: () => Promise.resolve(getWslConfig()),
+  setWslConfig: (config: WslConfig) => setWslConfig(config),
+  getDisplayBackend: async () => null,
+  setDisplayBackend: async () => undefined,
+  parseMarkdown: async (markdown) => parseMarkdown(markdown),
+  checkAppExists: async (appName) => checkAppExists(appName),
+  wslPath: async (path, mode) => wslPath(path, mode),
+  resolveAppPath: async (appName) => resolveAppPath(appName),
+  loadingWindowComplete: () => loadingComplete.resolve(),
+  runUpdater: async (alertOnFail) => checkForUpdates(alertOnFail),
+  checkUpdate: async () => checkUpdate(),
+  installUpdate: async () => installUpdate(),
+})
+
+function killSidecar() {
+  if (!sidecar) return
+  sidecar.kill()
+  sidecar = null
+}
+
+function ensureLoopbackNoProxy() {
+  const loopback = ["127.0.0.1", "localhost", "::1"]
+  const upsert = (key: string) => {
+    const items = (process.env[key] ?? "")
+      .split(",")
+      .map((value: string) => value.trim())
+      .filter((value: string) => Boolean(value))
+
+    for (const host of loopback) {
+      if (items.some((value: string) => value.toLowerCase() === host)) continue
+      items.push(host)
+    }
+
+    process.env[key] = items.join(",")
+  }
+
+  upsert("NO_PROXY")
+  upsert("no_proxy")
+}
+
+async function getSidecarPort() {
+  const fromEnv = process.env.OPENCODE_PORT
+  if (fromEnv) {
+    const parsed = Number.parseInt(fromEnv, 10)
+    if (!Number.isNaN(parsed)) return parsed
+  }
+
+  return await new Promise<number>((resolve, reject) => {
+    const server = createServer()
+    server.on("error", reject)
+    server.listen(0, "127.0.0.1", () => {
+      const address = server.address()
+      if (typeof address !== "object" || !address) {
+        server.close()
+        reject(new Error("Failed to get port"))
+        return
+      }
+      const port = address.port
+      server.close(() => resolve(port))
+    })
+  })
+}
+
+function sqliteFileExists() {
+  const xdg = process.env.XDG_DATA_HOME
+  const base = xdg && xdg.length > 0 ? xdg : join(homedir(), ".local", "share")
+  return existsSync(join(base, "opencode", "opencode.db"))
+}
+
+function setupAutoUpdater() {
+  if (!UPDATER_ENABLED) return
+  autoUpdater.logger = logger
+  autoUpdater.channel = "latest"
+  autoUpdater.allowPrerelease = false
+  autoUpdater.allowDowngrade = true
+  autoUpdater.autoDownload = false
+  autoUpdater.autoInstallOnAppQuit = true
+  logger.log("auto updater configured", {
+    channel: autoUpdater.channel,
+    allowPrerelease: autoUpdater.allowPrerelease,
+    allowDowngrade: autoUpdater.allowDowngrade,
+    currentVersion: app.getVersion(),
+  })
+}
+
+let updateReady = false
+
+async function checkUpdate() {
+  if (!UPDATER_ENABLED) return { updateAvailable: false }
+  updateReady = false
+  logger.log("checking for updates", {
+    currentVersion: app.getVersion(),
+    channel: autoUpdater.channel,
+    allowPrerelease: autoUpdater.allowPrerelease,
+    allowDowngrade: autoUpdater.allowDowngrade,
+  })
+  try {
+    const result = await autoUpdater.checkForUpdates()
+    const updateInfo = result?.updateInfo
+    logger.log("update metadata fetched", {
+      releaseVersion: updateInfo?.version ?? null,
+      releaseDate: updateInfo?.releaseDate ?? null,
+      releaseName: updateInfo?.releaseName ?? null,
+      files: updateInfo?.files?.map((file) => file.url) ?? [],
+    })
+    const version = result?.updateInfo?.version
+    if (!version) {
+      logger.log("no update available", { reason: "provider returned no newer version" })
+      return { updateAvailable: false }
+    }
+    logger.log("update available", { version })
+    await autoUpdater.downloadUpdate()
+    logger.log("update download completed", { version })
+    updateReady = true
+    return { updateAvailable: true, version }
+  } catch (error) {
+    logger.error("update check failed", error)
+    return { updateAvailable: false, failed: true }
+  }
+}
+
+async function installUpdate() {
+  if (!updateReady) return
+  killSidecar()
+  autoUpdater.quitAndInstall()
+}
+
+async function checkForUpdates(alertOnFail: boolean) {
+  if (!UPDATER_ENABLED) return
+  logger.log("checkForUpdates invoked", { alertOnFail })
+  const result = await checkUpdate()
+  if (!result.updateAvailable) {
+    if (result.failed) {
+      logger.log("no update decision", { reason: "update check failed" })
+      if (!alertOnFail) return
+      await dialog.showMessageBox({
+        type: "error",
+        message: "Update check failed.",
+        title: "Update Error",
+      })
+      return
+    }
+
+    logger.log("no update decision", { reason: "already up to date" })
+    if (!alertOnFail) return
+    await dialog.showMessageBox({
+      type: "info",
+      message: "You're up to date.",
+      title: "No Updates",
+    })
+    return
+  }
+
+  const response = await dialog.showMessageBox({
+    type: "info",
+    message: `Update ${result.version ?? ""} downloaded. Restart now?`,
+    title: "Update Ready",
+    buttons: ["Restart", "Later"],
+    defaultId: 0,
+    cancelId: 1,
+  })
+  logger.log("update prompt response", {
+    version: result.version ?? null,
+    restartNow: response.response === 0,
+  })
+  if (response.response === 0) {
+    await installUpdate()
+  }
+}
+
+function delay(ms: number) {
+  return new Promise((resolve) => setTimeout(resolve, ms))
+}
+
+function defer<T>() {
+  let resolve!: (value: T) => void
+  let reject!: (error: Error) => void
+  const promise = new Promise<T>((res, rej) => {
+    resolve = res
+    reject = rej
+  })
+  return { promise, resolve, reject }
+}
diff --git a/packages/desktop-electron/src/main/ipc.ts b/packages/desktop-electron/src/main/ipc.ts
new file mode 100644
index 000000000..bbb5379bb
--- /dev/null
+++ b/packages/desktop-electron/src/main/ipc.ts
@@ -0,0 +1,176 @@
+import { execFile } from "node:child_process"
+import { BrowserWindow, Notification, app, clipboard, dialog, ipcMain, shell } from "electron"
+import type { IpcMainEvent, IpcMainInvokeEvent } from "electron"
+
+import type { InitStep, ServerReadyData, SqliteMigrationProgress, WslConfig } from "../preload/types"
+import { getStore } from "./store"
+
+type Deps = {
+  killSidecar: () => void
+  installCli: () => Promise<string>
+  awaitInitialization: (sendStep: (step: InitStep) => void) => Promise<ServerReadyData>
+  getDefaultServerUrl: () => Promise<string | null> | string | null
+  setDefaultServerUrl: (url: string | null) => Promise<void> | void
+  getWslConfig: () => Promise<WslConfig>
+  setWslConfig: (config: WslConfig) => Promise<void> | void
+  getDisplayBackend: () => Promise<string | null>
+  setDisplayBackend: (backend: string | null) => Promise<void> | void
+  parseMarkdown: (markdown: string) => Promise<string> | string
+  checkAppExists: (appName: string) => Promise<boolean> | boolean
+  wslPath: (path: string, mode: "windows" | "linux" | null) => Promise<string>
+  resolveAppPath: (appName: string) => Promise<string | null>
+  loadingWindowComplete: () => void
+  runUpdater: (alertOnFail: boolean) => Promise<void> | void
+  checkUpdate: () => Promise<{ updateAvailable: boolean; version?: string }>
+  installUpdate: () => Promise<void> | void
+}
+
+export function registerIpcHandlers(deps: Deps) {
+  ipcMain.handle("kill-sidecar", () => deps.killSidecar())
+  ipcMain.handle("install-cli", () => deps.installCli())
+  ipcMain.handle("await-initialization", (event: IpcMainInvokeEvent) => {
+    const send = (step: InitStep) => event.sender.send("init-step", step)
+    return deps.awaitInitialization(send)
+  })
+  ipcMain.handle("get-default-server-url", () => deps.getDefaultServerUrl())
+  ipcMain.handle("set-default-server-url", (_event: IpcMainInvokeEvent, url: string | null) =>
+    deps.setDefaultServerUrl(url),
+  )
+  ipcMain.handle("get-wsl-config", () => deps.getWslConfig())
+  ipcMain.handle("set-wsl-config", (_event: IpcMainInvokeEvent, config: WslConfig) => deps.setWslConfig(config))
+  ipcMain.handle("get-display-backend", () => deps.getDisplayBackend())
+  ipcMain.handle("set-display-backend", (_event: IpcMainInvokeEvent, backend: string | null) =>
+    deps.setDisplayBackend(backend),
+  )
+  ipcMain.handle("parse-markdown", (_event: IpcMainInvokeEvent, markdown: string) => deps.parseMarkdown(markdown))
+  ipcMain.handle("check-app-exists", (_event: IpcMainInvokeEvent, appName: string) => deps.checkAppExists(appName))
+  ipcMain.handle("wsl-path", (_event: IpcMainInvokeEvent, path: string, mode: "windows" | "linux" | null) =>
+    deps.wslPath(path, mode),
+  )
+  ipcMain.handle("resolve-app-path", (_event: IpcMainInvokeEvent, appName: string) => deps.resolveAppPath(appName))
+  ipcMain.on("loading-window-complete", () => deps.loadingWindowComplete())
+  ipcMain.handle("run-updater", (_event: IpcMainInvokeEvent, alertOnFail: boolean) => deps.runUpdater(alertOnFail))
+  ipcMain.handle("check-update", () => deps.checkUpdate())
+  ipcMain.handle("install-update", () => deps.installUpdate())
+  ipcMain.handle("store-get", (_event: IpcMainInvokeEvent, name: string, key: string) => {
+    const store = getStore(name)
+    const value = store.get(key)
+    if (value === undefined || value === null) return null
+    return typeof value === "string" ? value : JSON.stringify(value)
+  })
+  ipcMain.handle("store-set", (_event: IpcMainInvokeEvent, name: string, key: string, value: string) => {
+    getStore(name).set(key, value)
+  })
+  ipcMain.handle("store-delete", (_event: IpcMainInvokeEvent, name: string, key: string) => {
+    getStore(name).delete(key)
+  })
+  ipcMain.handle("store-clear", (_event: IpcMainInvokeEvent, name: string) => {
+    getStore(name).clear()
+  })
+  ipcMain.handle("store-keys", (_event: IpcMainInvokeEvent, name: string) => {
+    const store = getStore(name)
+    return Object.keys(store.store)
+  })
+  ipcMain.handle("store-length", (_event: IpcMainInvokeEvent, name: string) => {
+    const store = getStore(name)
+    return Object.keys(store.store).length
+  })
+
+  ipcMain.handle(
+    "open-directory-picker",
+    async (_event: IpcMainInvokeEvent, opts?: { multiple?: boolean; title?: string; defaultPath?: string }) => {
+      const result = await dialog.showOpenDialog({
+        properties: ["openDirectory", ...(opts?.multiple ? ["multiSelections" as const] : [])],
+        title: opts?.title ?? "Choose a folder",
+        defaultPath: opts?.defaultPath,
+      })
+      if (result.canceled) return null
+      return opts?.multiple ? result.filePaths : result.filePaths[0]
+    },
+  )
+
+  ipcMain.handle(
+    "open-file-picker",
+    async (_event: IpcMainInvokeEvent, opts?: { multiple?: boolean; title?: string; defaultPath?: string }) => {
+      const result = await dialog.showOpenDialog({
+        properties: ["openFile", ...(opts?.multiple ? ["multiSelections" as const] : [])],
+        title: opts?.title ?? "Choose a file",
+        defaultPath: opts?.defaultPath,
+      })
+      if (result.canceled) return null
+      return opts?.multiple ? result.filePaths : result.filePaths[0]
+    },
+  )
+
+  ipcMain.handle(
+    "save-file-picker",
+    async (_event: IpcMainInvokeEvent, opts?: { title?: string; defaultPath?: string }) => {
+      const result = await dialog.showSaveDialog({
+        title: opts?.title ?? "Save file",
+        defaultPath: opts?.defaultPath,
+      })
+      if (result.canceled) return null
+      return result.filePath ?? null
+    },
+  )
+
+  ipcMain.on("open-link", (_event: IpcMainEvent, url: string) => {
+    void shell.openExternal(url)
+  })
+
+  ipcMain.handle("open-path", async (_event: IpcMainInvokeEvent, path: string, app?: string) => {
+    if (!app) return shell.openPath(path)
+    await new Promise<void>((resolve, reject) => {
+      const [cmd, args] =
+        process.platform === "darwin" ? (["open", ["-a", app, path]] as const) : ([app, [path]] as const)
+      execFile(cmd, args, (err) => (err ? reject(err) : resolve()))
+    })
+  })
+
+  ipcMain.handle("read-clipboard-image", () => {
+    const image = clipboard.readImage()
+    if (image.isEmpty()) return null
+    const buffer = image.toPNG().buffer
+    const size = image.getSize()
+    return { buffer, width: size.width, height: size.height }
+  })
+
+  ipcMain.on("show-notification", (_event: IpcMainEvent, title: string, body?: string) => {
+    new Notification({ title, body }).show()
+  })
+
+  ipcMain.handle("get-window-focused", (event: IpcMainInvokeEvent) => {
+    const win = BrowserWindow.fromWebContents(event.sender)
+    return win?.isFocused() ?? false
+  })
+
+  ipcMain.handle("set-window-focus", (event: IpcMainInvokeEvent) => {
+    const win = BrowserWindow.fromWebContents(event.sender)
+    win?.focus()
+  })
+
+  ipcMain.handle("show-window", (event: IpcMainInvokeEvent) => {
+    const win = BrowserWindow.fromWebContents(event.sender)
+    win?.show()
+  })
+
+  ipcMain.on("relaunch", () => {
+    app.relaunch()
+    app.exit(0)
+  })
+
+  ipcMain.handle("get-zoom-factor", (event: IpcMainInvokeEvent) => event.sender.getZoomFactor())
+  ipcMain.handle("set-zoom-factor", (event: IpcMainInvokeEvent, factor: number) => event.sender.setZoomFactor(factor))
+}
+
+export function sendSqliteMigrationProgress(win: BrowserWindow, progress: SqliteMigrationProgress) {
+  win.webContents.send("sqlite-migration-progress", progress)
+}
+
+export function sendMenuCommand(win: BrowserWindow, id: string) {
+  win.webContents.send("menu-command", id)
+}
+
+export function sendDeepLinks(win: BrowserWindow, urls: string[]) {
+  win.webContents.send("deep-link", urls)
+}
diff --git a/packages/desktop-electron/src/main/logging.ts b/packages/desktop-electron/src/main/logging.ts
new file mode 100644
index 000000000..d315b2d34
--- /dev/null
+++ b/packages/desktop-electron/src/main/logging.ts
@@ -0,0 +1,40 @@
+import log from "electron-log/main.js"
+import { readFileSync, readdirSync, statSync, unlinkSync } from "node:fs"
+import { dirname, join } from "node:path"
+
+const MAX_LOG_AGE_DAYS = 7
+const TAIL_LINES = 1000
+
+export function initLogging() {
+  log.transports.file.maxSize = 5 * 1024 * 1024
+  cleanup()
+  return log
+}
+
+export function tail(): string {
+  try {
+    const path = log.transports.file.getFile().path
+    const contents = readFileSync(path, "utf8")
+    const lines = contents.split("\n")
+    return lines.slice(Math.max(0, lines.length - TAIL_LINES)).join("\n")
+  } catch {
+    return ""
+  }
+}
+
+function cleanup() {
+  const path = log.transports.file.getFile().path
+  const dir = dirname(path)
+  const cutoff = Date.now() - MAX_LOG_AGE_DAYS * 24 * 60 * 60 * 1000
+
+  for (const entry of readdirSync(dir)) {
+    const file = join(dir, entry)
+    try {
+      const info = statSync(file)
+      if (!info.isFile()) continue
+      if (info.mtimeMs < cutoff) unlinkSync(file)
+    } catch {
+      continue
+    }
+  }
+}
diff --git a/packages/desktop-electron/src/main/markdown.ts b/packages/desktop-electron/src/main/markdown.ts
new file mode 100644
index 000000000..b956f4876
--- /dev/null
+++ b/packages/desktop-electron/src/main/markdown.ts
@@ -0,0 +1,16 @@
+import { marked, type Tokens } from "marked"
+
+const renderer = new marked.Renderer()
+
+renderer.link = ({ href, title, text }: Tokens.Link) => {
+  const titleAttr = title ? ` title="${title}"` : ""
+  return `<a href="${href}"${titleAttr} class="external-link" target="_blank" rel="noopener noreferrer">${text}</a>`
+}
+
+export function parseMarkdown(input: string) {
+  return marked(input, {
+    renderer,
+    breaks: false,
+    gfm: true,
+  })
+}
diff --git a/packages/desktop-electron/src/main/menu.ts b/packages/desktop-electron/src/main/menu.ts
new file mode 100644
index 000000000..53707ba7f
--- /dev/null
+++ b/packages/desktop-electron/src/main/menu.ts
@@ -0,0 +1,116 @@
+import { BrowserWindow, Menu, shell } from "electron"
+
+import { UPDATER_ENABLED } from "./constants"
+
+type Deps = {
+  trigger: (id: string) => void
+  installCli: () => void
+  checkForUpdates: () => void
+  reload: () => void
+  relaunch: () => void
+}
+
+export function createMenu(deps: Deps) {
+  if (process.platform !== "darwin") return
+
+  const template: Electron.MenuItemConstructorOptions[] = [
+    {
+      label: "OpenCode",
+      submenu: [
+        { role: "about" },
+        {
+          label: "Check for Updates...",
+          enabled: UPDATER_ENABLED,
+          click: () => deps.checkForUpdates(),
+        },
+        {
+          label: "Install CLI...",
+          click: () => deps.installCli(),
+        },
+        {
+          label: "Reload Webview",
+          click: () => deps.reload(),
+        },
+        {
+          label: "Restart",
+          click: () => deps.relaunch(),
+        },
+        { type: "separator" },
+        { role: "hide" },
+        { role: "hideOthers" },
+        { role: "unhide" },
+        { type: "separator" },
+        { role: "quit" },
+      ],
+    },
+    {
+      label: "File",
+      submenu: [
+        { label: "New Session", accelerator: "Shift+Cmd+S", click: () => deps.trigger("session.new") },
+        { label: "Open Project...", accelerator: "Cmd+O", click: () => deps.trigger("project.open") },
+        { type: "separator" },
+        { role: "close" },
+      ],
+    },
+    {
+      label: "Edit",
+      submenu: [
+        { role: "undo" },
+        { role: "redo" },
+        { type: "separator" },
+        { role: "cut" },
+        { role: "copy" },
+        { role: "paste" },
+        { role: "selectAll" },
+      ],
+    },
+    {
+      label: "View",
+      submenu: [
+        { label: "Toggle Sidebar", accelerator: "Cmd+B", click: () => deps.trigger("sidebar.toggle") },
+        { label: "Toggle Terminal", accelerator: "Ctrl+`", click: () => deps.trigger("terminal.toggle") },
+        { label: "Toggle File Tree", click: () => deps.trigger("fileTree.toggle") },
+        { type: "separator" },
+        { label: "Back", click: () => deps.trigger("common.goBack") },
+        { label: "Forward", click: () => deps.trigger("common.goForward") },
+        { type: "separator" },
+        {
+          label: "Previous Session",
+          accelerator: "Option+ArrowUp",
+          click: () => deps.trigger("session.previous"),
+        },
+        {
+          label: "Next Session",
+          accelerator: "Option+ArrowDown",
+          click: () => deps.trigger("session.next"),
+        },
+        { type: "separator" },
+        {
+          label: "Toggle Developer Tools",
+          accelerator: "Alt+Cmd+I",
+          click: () => BrowserWindow.getFocusedWindow()?.webContents.toggleDevTools(),
+        },
+      ],
+    },
+    {
+      label: "Help",
+      submenu: [
+        { label: "OpenCode Documentation", click: () => shell.openExternal("https://opencode.ai/docs") },
+        { label: "Support Forum", click: () => shell.openExternal("https://discord.com/invite/opencode") },
+        { type: "separator" },
+        { type: "separator" },
+        {
+          label: "Share Feedback",
+          click: () =>
+            shell.openExternal("https://github.com/anomalyco/opencode/issues/new?template=feature_request.yml"),
+        },
+        {
+          label: "Report a Bug",
+          click: () => shell.openExternal("https://github.com/anomalyco/opencode/issues/new?template=bug_report.yml"),
+        },
+      ],
+    },
+  ]
+
+  Menu.setApplicationMenu(Menu.buildFromTemplate(template))
+}
diff --git a/packages/desktop-electron/src/main/migrate.ts b/packages/desktop-electron/src/main/migrate.ts
new file mode 100644
index 000000000..bad1349ee
--- /dev/null
+++ b/packages/desktop-electron/src/main/migrate.ts
@@ -0,0 +1,91 @@
+import { app } from "electron"
+import log from "electron-log/main.js"
+import { existsSync, readdirSync, readFileSync } from "node:fs"
+import { homedir } from "node:os"
+import { join } from "node:path"
+import { CHANNEL } from "./constants"
+import { getStore, store } from "./store"
+
+const TAURI_MIGRATED_KEY = "tauriMigrated"
+
+// Resolve the directory where Tauri stored its .dat files for the given app identifier.
+// Mirrors Tauri's AppLocalData / AppData resolution per OS.
+function tauriDir(id: string) {
+  switch (process.platform) {
+    case "darwin":
+      return join(homedir(), "Library", "Application Support", id)
+    case "win32":
+      return join(process.env.APPDATA ?? join(homedir(), "AppData", "Roaming"), id)
+    default:
+      return join(process.env.XDG_DATA_HOME ?? join(homedir(), ".local", "share"), id)
+  }
+}
+
+// The Tauri app identifier changes between dev/beta/prod builds.
+const TAURI_APP_IDS: Record<string, string> = {
+  dev: "ai.opencode.desktop.dev",
+  beta: "ai.opencode.desktop.beta",
+  prod: "ai.opencode.desktop",
+}
+function tauriAppId() {
+  return app.isPackaged ? TAURI_APP_IDS[CHANNEL] : "ai.opencode.desktop.dev"
+}
+
+// Migrate a single Tauri .dat file into the corresponding electron-store.
+// `opencode.settings.dat` is special: it maps to the `opencode.settings` store
+// (the electron-store name without the `.dat` extension). All other .dat files
+// keep their full filename as the electron-store name so they match what the
+// renderer already passes via IPC (e.g. `"default.dat"`, `"opencode.global.dat"`).
+function migrateFile(datPath: string, filename: string) {
+  let data: Record<string, unknown>
+  try {
+    data = JSON.parse(readFileSync(datPath, "utf-8"))
+  } catch (err) {
+    log.warn("tauri migration: failed to parse", filename, err)
+    return
+  }
+
+  // opencode.settings.dat → the electron settings store ("opencode.settings").
+  // All other .dat files keep their full filename as the store name so they match
+  // what the renderer passes via IPC (e.g. "default.dat", "opencode.global.dat").
+  const storeName = filename === "opencode.settings.dat" ? "opencode.settings" : filename
+  const target = getStore(storeName)
+  const migrated: string[] = []
+  const skipped: string[] = []
+
+  for (const [key, value] of Object.entries(data)) {
+    // Don't overwrite values the user has already set in the Electron app.
+    if (target.has(key)) {
+      skipped.push(key)
+      continue
+    }
+    target.set(key, value)
+    migrated.push(key)
+  }
+
+  log.log("tauri migration: migrated", filename, "→", storeName, { migrated, skipped })
+}
+
+export function migrate() {
+  if (store.get(TAURI_MIGRATED_KEY)) {
+    log.log("tauri migration: already done, skipping")
+    return
+  }
+
+  const dir = tauriDir(tauriAppId())
+  log.log("tauri migration: starting", { dir })
+
+  if (!existsSync(dir)) {
+    log.log("tauri migration: no tauri data directory found, nothing to migrate")
+    store.set(TAURI_MIGRATED_KEY, true)
+    return
+  }
+
+  for (const filename of readdirSync(dir)) {
+    if (!filename.endsWith(".dat")) continue
+    migrateFile(join(dir, filename), filename)
+  }
+
+  log.log("tauri migration: complete")
+  store.set(TAURI_MIGRATED_KEY, true)
+}
diff --git a/packages/desktop-electron/src/main/server.ts b/packages/desktop-electron/src/main/server.ts
new file mode 100644
index 000000000..92018e72e
--- /dev/null
+++ b/packages/desktop-electron/src/main/server.ts
@@ -0,0 +1,129 @@
+import { dialog } from "electron"
+
+import { getConfig, serve, type CommandChild, type Config } from "./cli"
+import { DEFAULT_SERVER_URL_KEY, WSL_ENABLED_KEY } from "./constants"
+import { store } from "./store"
+
+export type WslConfig = { enabled: boolean }
+
+export type HealthCheck = { wait: Promise<void> }
+
+export function getDefaultServerUrl(): string | null {
+  const value = store.get(DEFAULT_SERVER_URL_KEY)
+  return typeof value === "string" ? value : null
+}
+
+export function setDefaultServerUrl(url: string | null) {
+  if (url) {
+    store.set(DEFAULT_SERVER_URL_KEY, url)
+    return
+  }
+
+  store.delete(DEFAULT_SERVER_URL_KEY)
+}
+
+export function getWslConfig(): WslConfig {
+  const value = store.get(WSL_ENABLED_KEY)
+  return { enabled: typeof value === "boolean" ? value : false }
+}
+
+export function setWslConfig(config: WslConfig) {
+  store.set(WSL_ENABLED_KEY, config.enabled)
+}
+
+export async function getSavedServerUrl(): Promise<string | null> {
+  const direct = getDefaultServerUrl()
+  if (direct) return direct
+
+  const config = await getConfig().catch(() => null)
+  if (!config) return null
+  return getServerUrlFromConfig(config)
+}
+
+export function spawnLocalServer(hostname: string, port: number, password: string) {
+  const { child, exit, events } = serve(hostname, port, password)
+
+  const wait = (async () => {
+    const url = `http://${hostname}:${port}`
+
+    const ready = async () => {
+      while (true) {
+        await new Promise((resolve) => setTimeout(resolve, 100))
+        if (await checkHealth(url, password)) return
+      }
+    }
+
+    const terminated = async () => {
+      const payload = await exit
+      throw new Error(
+        `Sidecar terminated before becoming healthy (code=${payload.code ?? "unknown"} signal=${
+          payload.signal ?? "unknown"
+        })`,
+      )
+    }
+
+    await Promise.race([ready(), terminated()])
+  })()
+
+  return { child, health: { wait }, events }
+}
+
+export async function checkHealth(url: string, password?: string | null): Promise<boolean> {
+  let healthUrl: URL
+  try {
+    healthUrl = new URL("/global/health", url)
+  } catch {
+    return false
+  }
+
+  const headers = new Headers()
+  if (password) {
+    const auth = Buffer.from(`opencode:${password}`).toString("base64")
+    headers.set("authorization", `Basic ${auth}`)
+  }
+
+  try {
+    const res = await fetch(healthUrl, {
+      method: "GET",
+      headers,
+      signal: AbortSignal.timeout(3000),
+    })
+    return res.ok
+  } catch {
+    return false
+  }
+}
+
+export async function checkHealthOrAskRetry(url: string): Promise<boolean> {
+  while (true) {
+    if (await checkHealth(url)) return true
+
+    const result = await dialog.showMessageBox({
+      type: "warning",
+      message: `Could not connect to configured server:\n${url}\n\nWould you like to retry or start a local server instead?`,
+      title: "Connection Failed",
+      buttons: ["Retry", "Start Local"],
+      defaultId: 0,
+      cancelId: 1,
+    })
+
+    if (result.response === 0) continue
+    return false
+  }
+}
+
+export function normalizeHostnameForUrl(hostname: string) {
+  if (hostname === "0.0.0.0") return "127.0.0.1"
+  if (hostname === "::") return "[::1]"
+  if (hostname.includes(":") && !hostname.startsWith("[")) return `[${hostname}]`
+  return hostname
+}
+
+export function getServerUrlFromConfig(config: Config) {
+  const server = config.server
+  if (!server?.port) return null
+  const host = server.hostname ? normalizeHostnameForUrl(server.hostname) : "127.0.0.1"
+  return `http://${host}:${server.port}`
+}
+
+export type { CommandChild }
diff --git a/packages/desktop-electron/src/main/store.ts b/packages/desktop-electron/src/main/store.ts
new file mode 100644
index 000000000..fa1c5682e
--- /dev/null
+++ b/packages/desktop-electron/src/main/store.ts
@@ -0,0 +1,15 @@
+import Store from "electron-store"
+
+import { SETTINGS_STORE } from "./constants"
+
+const cache = new Map<string, Store>()
+
+export function getStore(name = SETTINGS_STORE) {
+  const cached = cache.get(name)
+  if (cached) return cached
+  const next = new Store({ name })
+  cache.set(name, next)
+  return next
+}
+
+export const store = getStore(SETTINGS_STORE)
diff --git a/packages/desktop-electron/src/main/windows.ts b/packages/desktop-electron/src/main/windows.ts
new file mode 100644
index 000000000..9178457f8
--- /dev/null
+++ b/packages/desktop-electron/src/main/windows.ts
@@ -0,0 +1,135 @@
+import windowState from "electron-window-state"
+import { app, BrowserWindow, nativeImage } from "electron"
+import { dirname, join } from "node:path"
+import { fileURLToPath } from "node:url"
+
+type Globals = {
+  updaterEnabled: boolean
+  wsl: boolean
+  deepLinks?: string[]
+}
+
+const root = dirname(fileURLToPath(import.meta.url))
+
+function iconsDir() {
+  return app.isPackaged ? join(process.resourcesPath, "icons") : join(root, "../../resources/icons")
+}
+
+function iconPath() {
+  const ext = process.platform === "win32" ? "ico" : "png"
+  return join(iconsDir(), `icon.${ext}`)
+}
+
+export function setDockIcon() {
+  if (process.platform !== "darwin") return
+  app.dock?.setIcon(nativeImage.createFromPath(join(iconsDir(), "[email protected]")))
+}
+
+export function createMainWindow(globals: Globals) {
+  const state = windowState({
+    defaultWidth: 1280,
+    defaultHeight: 800,
+  })
+
+  const win = new BrowserWindow({
+    x: state.x,
+    y: state.y,
+    width: state.width,
+    height: state.height,
+    show: true,
+    title: "OpenCode",
+    icon: iconPath(),
+    ...(process.platform === "darwin"
+      ? {
+          titleBarStyle: "hidden" as const,
+          trafficLightPosition: { x: 12, y: 14 },
+        }
+      : {}),
+    ...(process.platform === "win32"
+      ? {
+          frame: false,
+          titleBarStyle: "hidden" as const,
+          titleBarOverlay: {
+            color: "transparent",
+            symbolColor: "#999",
+            height: 40,
+          },
+        }
+      : {}),
+    webPreferences: {
+      preload: join(root, "../preload/index.mjs"),
+      sandbox: false,
+    },
+  })
+
+  state.manage(win)
+  loadWindow(win, "index.html")
+  wireZoom(win)
+  injectGlobals(win, globals)
+
+  return win
+}
+
+export function createLoadingWindow(globals: Globals) {
+  const win = new BrowserWindow({
+    width: 640,
+    height: 480,
+    resizable: false,
+    center: true,
+    show: true,
+    icon: iconPath(),
+    ...(process.platform === "darwin" ? { titleBarStyle: "hidden" as const } : {}),
+    ...(process.platform === "win32"
+      ? {
+          frame: false,
+          titleBarStyle: "hidden" as const,
+          titleBarOverlay: {
+            color: "transparent",
+            symbolColor: "#999",
+            height: 40,
+          },
+        }
+      : {}),
+    webPreferences: {
+      preload: join(root, "../preload/index.mjs"),
+      sandbox: false,
+    },
+  })
+
+  loadWindow(win, "loading.html")
+  injectGlobals(win, globals)
+
+  return win
+}
+
+function loadWindow(win: BrowserWindow, html: string) {
+  const devUrl = process.env.ELECTRON_RENDERER_URL
+  if (devUrl) {
+    const url = new URL(html, devUrl)
+    void win.loadURL(url.toString())
+    return
+  }
+
+  void win.loadFile(join(root, `../renderer/${html}`))
+}
+
+function injectGlobals(win: BrowserWindow, globals: Globals) {
+  win.webContents.on("dom-ready", () => {
+    const deepLinks = globals.deepLinks ?? []
+    const data = {
+      updaterEnabled: globals.updaterEnabled,
+      wsl: globals.wsl,
+      deepLinks: Array.isArray(deepLinks) ? deepLinks.splice(0) : deepLinks,
+    }
+    void win.webContents.executeJavaScript(
+      `window.__OPENCODE__ = Object.assign(window.__OPENCODE__ ?? {}, ${JSON.stringify(data)})`,
+    )
+  })
+}
+
+function wireZoom(win: BrowserWindow) {
+  win.webContents.setZoomFactor(1)
+  win.webContents.on("zoom-changed", () => {
+    win.webContents.setZoomFactor(1)
+  })
+}