fix: speed up opening OpenCode in the terminal

Every 'Open in terminal' launch for OpenCode copied the bundled plugin dependency tree (about 3,600 files, 52 MB) into a temporary directory, adding 2.2-2.4 s on Windows before the TUI started. The tree is now copied once into terminal/opencode-config under user data and reused until its bundled version marker changes. Skills, Ask-mode plugins and model configuration are still generated per launch and cleaned up on close. OpenCode's own TUI startup (about 3 s) is unchanged; the remote Agent path is unaffected.

Release note: 在终端中打开 OpenCode 时不再每次复制插件依赖，第二次及以后的打开速度明显加快。

docs/features/assistant-workbar/progress.md

@@ -1,5 +1,17 @@
 # 工作栏实现与验证进度
 
+## 2026-09-30：OpenCode 终端启动准备
+
+原先每次“在终端中打开” OpenCode 都会把随包插件依赖目录（约 3,600 个文件、52 MB）
+复制到临时目录，Windows 本机每次约 2.2–2.4 秒。现在该目录只复制一次到用户数据下的
+`terminal/opencode-config`，按 `.goodbuddy-ready.json` 判断是否需要刷新；Skills、Ask
+插件和模型配置仍按每次启动单独生成，关闭时清理。
+
+Windows 本机实测启动准备：首次 2.9 秒，之后 19–44 ms。OpenCode 自身 TUI 从进程启动
+到显示输入框约 2.9–3.3 秒，由 OpenCode 程序决定，本次未改变。验证：原生终端单元测试
+5 项通过；已安装 OpenCode 的 Ask／Execute 真实 PTY 测试 2 项通过（合成模型，真实模型
+调用 0 次）。远程 Agent 使用独立的 OpenCode 启动路径，不受本次修改影响。
+
 ## 2026-09-28：消息取消与失败展示
 
 消息终态按[Runtime 交互边界](./runtime-interactions.md)保存和展示。取消使用结构化

src/main/agent/native-terminal-client.test.ts

@@ -1,5 +1,5 @@
 // @vitest-environment node
-import { mkdtemp, readFile, readdir, rm } from 'node:fs/promises'
+import { mkdir, mkdtemp, readFile, readdir, rm, stat, writeFile } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import { join } from 'node:path'
 import { afterEach, describe, expect, it, vi } from 'vitest'
@@ -82,6 +82,26 @@ describe('native terminal client', () => {
     await expect(client.open(1, input)).resolves.toMatchObject({ state: 'running' })
   })
 
+  it('copies the bundled OpenCode config once and reuses it for later launches', async () => {
+    const { root, create, fetcher, input } = await fixture()
+    const bundled = join(root, 'bundled-config')
+    await mkdir(join(bundled, 'node_modules', 'plugin'), { recursive: true })
+    await writeFile(join(bundled, '.goodbuddy-ready.json'), '{"version":"1"}')
+    await writeFile(join(bundled, 'node_modules', 'plugin', 'index.js'), 'export {}')
+    const client = new NativeTerminalClient({
+      terminalManager: { create }, rootDirectory: root, fetcher,
+      bundledRuntimePaths: { opencode: process.execPath, opencodeConfig: bundled, continue: process.execPath, ripgrep: '', deepseekHarness: '' }
+    })
+    await client.open(1, input)
+    const configDirectory = launches[0]!.spawnSpec.env.OPENCODE_CONFIG_DIR!
+    expect(configDirectory).toBe(join(root, 'opencode-config'))
+    const copied = (await stat(join(configDirectory, 'node_modules', 'plugin', 'index.js'))).mtimeMs
+    await launches[0]!.dispose()
+    await client.open(1, { ...input, workMode: 'execute' })
+    expect(launches[1]!.spawnSpec.env.OPENCODE_CONFIG_DIR).toBe(configDirectory)
+    expect((await stat(join(configDirectory, 'node_modules', 'plugin', 'index.js'))).mtimeMs).toBe(copied)
+  })
+
   it('uses Execute permissions and explicit session MCP endpoints', async () => {
     const { client, input } = await fixture()
     await client.open(1, { ...input, workMode: 'execute', mcpServers: [{ name: 'tools', url: 'http://127.0.0.1:12345/mcp', headers: { Authorization: 'Bearer local-token' } }] })

src/main/agent/native-terminal-client.ts

@@ -1,6 +1,6 @@
 import { randomUUID } from 'node:crypto'
 import { execFile } from 'node:child_process'
-import { cp, mkdir, mkdtemp, readFile, rm, stat, writeFile } from 'node:fs/promises'
+import { cp, mkdir, mkdtemp, readFile, rename, rm, stat, writeFile } from 'node:fs/promises'
 import { dirname, join } from 'node:path'
 import { pathToFileURL } from 'node:url'
 import { promisify } from 'node:util'
@@ -49,6 +49,29 @@ export type NativeTerminalClientOptions = {
 // Same native read permissions as the existing remote OpenCode adapter.
 const openCodeReadTools = ['read', 'glob', 'grep', 'list', 'lsp', 'webfetch', 'websearch', 'codesearch', 'question', 'external_directory']
 const continueReadTools = ['Read', 'List', 'Search', 'Fetch', 'Diff', 'AskQuestion', 'CheckBackgroundJob', 'Skills']
+const sharedOpenCodeConfigs = new Map<string, Promise<string>>()
+
+/** Copies the bundled OpenCode plugin tree once instead of on every terminal launch. */
+function prepareSharedOpenCodeConfig(source: string, target: string): Promise<string> {
+  const existing = sharedOpenCodeConfigs.get(target)
+  if (existing) return existing
+  const operation = (async () => {
+    const marker = '.goodbuddy-ready.json'
+    const expected = await readFile(join(source, marker), 'utf8').catch(() => undefined)
+    if (expected !== undefined && await readFile(join(target, marker), 'utf8').catch(() => undefined) === expected) return target
+    const staging = `${target}.staging-${randomUUID()}`
+    try {
+      await cp(source, staging, { recursive: true })
+      await rm(target, { recursive: true, force: true })
+      await rename(staging, target)
+    } finally {
+      await rm(staging, { recursive: true, force: true })
+    }
+    return target
+  })().catch(error => { sharedOpenCodeConfigs.delete(target); throw error })
+  sharedOpenCodeConfigs.set(target, operation)
+  return operation
+}
 
 export class NativeTerminalClient {
   private readonly pending = new Map<string, Promise<TerminalSnapshot>>()
@@ -176,11 +199,12 @@ export class NativeTerminalClient {
         if (input.workMode === 'execute') args.push('--auto')
         else args.push('--readonly', ...allowedContinueTools.flatMap(name => ['--allow', name]), '--exclude', '*')
       } else {
-        const configDirectory = join(temporary, 'config')
-        if (this.options.bundledRuntimePaths.opencodeConfig) {
-          await cp(this.options.bundledRuntimePaths.opencodeConfig, configDirectory, { recursive: true })
-        }
-        const skillsRoot = await stageRuntimeSkillPackages(configDirectory, skills, 'OpenCode')
+        const bundledConfig = this.options.bundledRuntimePaths.opencodeConfig
+        const configDirectory = bundledConfig
+          ? await prepareSharedOpenCodeConfig(bundledConfig, join(root, 'opencode-config'))
+          : join(temporary, 'config')
+        await mkdir(configDirectory, { recursive: true })
+        const skillsRoot = await stageRuntimeSkillPackages(join(temporary, 'opencode'), skills, 'OpenCode')
         const config = createOpenCodeModelBridgeProviderConfig({
           protocol: managed.profile.protocol, model: selected.modelName, name: selected.name,
           loopbackOrigin: origin, supportsImageInput: selected.supportsImageInput, workMode: input.workMode