tui plugins (#19347)

packages/opencode/src/bun/index.ts

@@ -6,7 +6,7 @@ import { Filesystem } from "../util/filesystem"
 import { NamedError } from "@opencode-ai/util/error"
 import { Lock } from "../util/lock"
 import { PackageRegistry } from "./registry"
-import { proxied } from "@/util/proxied"
+import { online, proxied } from "@/util/network"
 import { Process } from "../util/process"
 
 export namespace BunProc {
@@ -68,12 +68,13 @@ export namespace BunProc {
 
     if (!modExists || !cachedVersion) {
       // continue to install
-    } else if (version !== "latest" && cachedVersion === version) {
-      return mod
     } else if (version === "latest") {
-      const isOutdated = await PackageRegistry.isOutdated(pkg, cachedVersion, Global.Path.cache)
-      if (!isOutdated) return mod
+      if (!online()) return mod
+      const stale = await PackageRegistry.isOutdated(pkg, cachedVersion, Global.Path.cache)
+      if (!stale) return mod
       log.info("Cached version is outdated, proceeding with install", { pkg, cachedVersion })
+    } else if (cachedVersion === version) {
+      return mod
     }
 
     // Build command arguments

packages/opencode/src/bun/registry.ts

@@ -1,6 +1,7 @@
 import semver from "semver"
 import { Log } from "../util/log"
 import { Process } from "../util/process"
+import { online } from "@/util/network"
 
 export namespace PackageRegistry {
   const log = Log.create({ service: "bun" })
@@ -10,6 +11,11 @@ export namespace PackageRegistry {
   }
 
   export async function info(pkg: string, field: string, cwd?: string): Promise<string | null> {
+    if (!online()) {
+      log.debug("offline, skipping bun info", { pkg, field })
+      return null
+    }
+
     const { code, stdout, stderr } = await Process.run([which(), "info", pkg, field], {
       cwd,
       env: {

packages/opencode/src/cli/cmd/db.ts

@@ -6,6 +6,7 @@ import { UI } from "../ui"
 import { cmd } from "./cmd"
 import { JsonMigration } from "../../storage/json-migration"
 import { EOL } from "os"
+import { errorMessage } from "../../util/error"
 
 const QueryCommand = cmd({
   command: "$0 [query]",
@@ -39,7 +40,7 @@ const QueryCommand = cmd({
           }
         }
       } catch (err) {
-        UI.error(err instanceof Error ? err.message : String(err))
+        UI.error(errorMessage(err))
         process.exit(1)
       }
       db.close()
@@ -100,7 +101,7 @@ const MigrateCommand = cmd({
       }
     } catch (err) {
       if (tty) process.stderr.write("\x1b[?25h")
-      UI.error(`Migration failed: ${err instanceof Error ? err.message : String(err)}`)
+      UI.error(`Migration failed: ${errorMessage(err)}`)
       process.exit(1)
     } finally {
       sqlite.close()

packages/opencode/src/cli/cmd/plug.ts

@@ -0,0 +1,231 @@
+import { intro, log, outro, spinner } from "@clack/prompts"
+import type { Argv } from "yargs"
+
+import { ConfigPaths } from "../../config/paths"
+import { Global } from "../../global"
+import { installPlugin, patchPluginConfig, readPluginManifest } from "../../plugin/install"
+import { resolvePluginTarget } from "../../plugin/shared"
+import { Instance } from "../../project/instance"
+import { errorMessage } from "../../util/error"
+import { Filesystem } from "../../util/filesystem"
+import { Process } from "../../util/process"
+import { UI } from "../ui"
+import { cmd } from "./cmd"
+
+type Spin = {
+  start: (msg: string) => void
+  stop: (msg: string, code?: number) => void
+}
+
+export type PlugDeps = {
+  spinner: () => Spin
+  log: {
+    error: (msg: string) => void
+    info: (msg: string) => void
+    success: (msg: string) => void
+  }
+  resolve: (spec: string) => Promise<string>
+  readText: (file: string) => Promise<string>
+  write: (file: string, text: string) => Promise<void>
+  exists: (file: string) => Promise<boolean>
+  files: (dir: string, name: "opencode" | "tui") => string[]
+  global: string
+}
+
+export type PlugInput = {
+  mod: string
+  global?: boolean
+  force?: boolean
+}
+
+export type PlugCtx = {
+  vcs?: string
+  worktree: string
+  directory: string
+}
+
+const defaultPlugDeps: PlugDeps = {
+  spinner: () => spinner(),
+  log: {
+    error: (msg) => log.error(msg),
+    info: (msg) => log.info(msg),
+    success: (msg) => log.success(msg),
+  },
+  resolve: (spec) => resolvePluginTarget(spec),
+  readText: (file) => Filesystem.readText(file),
+  write: async (file, text) => {
+    await Filesystem.write(file, text)
+  },
+  exists: (file) => Filesystem.exists(file),
+  files: (dir, name) => ConfigPaths.fileInDirectory(dir, name),
+  global: Global.Path.config,
+}
+
+function cause(err: unknown) {
+  if (!err || typeof err !== "object") return
+  if (!("cause" in err)) return
+  return (err as { cause?: unknown }).cause
+}
+
+export function createPlugTask(input: PlugInput, dep: PlugDeps = defaultPlugDeps) {
+  const mod = input.mod
+  const force = Boolean(input.force)
+  const global = Boolean(input.global)
+
+  return async (ctx: PlugCtx) => {
+    const install = dep.spinner()
+    install.start("Installing plugin package...")
+    const target = await installPlugin(mod, dep)
+    if (!target.ok) {
+      install.stop("Install failed", 1)
+      dep.log.error(`Could not install "${mod}"`)
+      const hit = cause(target.error) ?? target.error
+      if (hit instanceof Process.RunFailedError) {
+        const lines = hit.stderr
+          .toString()
+          .split(/\r?\n/)
+          .map((line) => line.trim())
+          .filter(Boolean)
+        const errs = lines.filter((line) => line.startsWith("error:")).map((line) => line.replace(/^error:\s*/, ""))
+        const detail = errs[0] ?? lines.at(-1)
+        if (detail) dep.log.error(detail)
+        if (lines.some((line) => line.includes("No version matching"))) {
+          dep.log.info("This package depends on a version that is not available in your npm registry.")
+          dep.log.info("Check npm registry/auth settings and try again.")
+        }
+      }
+      if (!(hit instanceof Process.RunFailedError)) {
+        dep.log.error(errorMessage(hit))
+      }
+      return false
+    }
+    install.stop("Plugin package ready")
+
+    const inspect = dep.spinner()
+    inspect.start("Reading plugin manifest...")
+    const manifest = await readPluginManifest(target.target)
+    if (!manifest.ok) {
+      if (manifest.code === "manifest_read_failed") {
+        inspect.stop("Manifest read failed", 1)
+        dep.log.error(`Installed "${mod}" but failed to read ${manifest.file}`)
+        dep.log.error(errorMessage(cause(manifest.error) ?? manifest.error))
+        return false
+      }
+
+      if (manifest.code === "manifest_no_targets") {
+        inspect.stop("No plugin targets found", 1)
+        dep.log.error(`"${mod}" does not declare supported targets in package.json`)
+        dep.log.info('Expected: "oc-plugin": ["server", "tui"] or tuples like [["tui", { ... }]].')
+        return false
+      }
+
+      inspect.stop("Manifest read failed", 1)
+      return false
+    }
+
+    inspect.stop(
+      `Detected ${manifest.targets.map((item) => item.kind).join(" + ")} target${manifest.targets.length === 1 ? "" : "s"}`,
+    )
+
+    const patch = dep.spinner()
+    patch.start("Updating plugin config...")
+    const out = await patchPluginConfig(
+      {
+        spec: mod,
+        targets: manifest.targets,
+        force,
+        global,
+        vcs: ctx.vcs,
+        worktree: ctx.worktree,
+        directory: ctx.directory,
+        config: dep.global,
+      },
+      dep,
+    )
+    if (!out.ok) {
+      if (out.code === "invalid_json") {
+        patch.stop(`Failed updating ${out.kind} config`, 1)
+        dep.log.error(`Invalid JSON in ${out.file} (${out.parse} at line ${out.line}, column ${out.col})`)
+        dep.log.info("Fix the config file and run the command again.")
+        return false
+      }
+
+      patch.stop("Failed updating plugin config", 1)
+      dep.log.error(errorMessage(out.error))
+      return false
+    }
+    patch.stop("Plugin config updated")
+    for (const item of out.items) {
+      if (item.mode === "noop") {
+        dep.log.info(`Already configured in ${item.file}`)
+        continue
+      }
+      if (item.mode === "replace") {
+        dep.log.info(`Replaced in ${item.file}`)
+        continue
+      }
+      dep.log.info(`Added to ${item.file}`)
+    }
+
+    dep.log.success(`Installed ${mod}`)
+    dep.log.info(global ? `Scope: global (${out.dir})` : `Scope: local (${out.dir})`)
+    return true
+  }
+}
+
+export const PluginCommand = cmd({
+  command: "plugin <module>",
+  aliases: ["plug"],
+  describe: "install plugin and update config",
+  builder: (yargs: Argv) => {
+    return yargs
+      .positional("module", {
+        type: "string",
+        describe: "npm module name",
+      })
+      .option("global", {
+        alias: ["g"],
+        type: "boolean",
+        default: false,
+        describe: "install in global config",
+      })
+      .option("force", {
+        alias: ["f"],
+        type: "boolean",
+        default: false,
+        describe: "replace existing plugin version",
+      })
+  },
+  handler: async (args) => {
+    const mod = String(args.module ?? "").trim()
+    if (!mod) {
+      UI.error("module is required")
+      process.exitCode = 1
+      return
+    }
+
+    UI.empty()
+    intro(`Install plugin ${mod}`)
+
+    const run = createPlugTask({
+      mod,
+      global: Boolean(args.global),
+      force: Boolean(args.force),
+    })
+    let ok = true
+
+    await Instance.provide({
+      directory: process.cwd(),
+      fn: async () => {
+        ok = await run({
+          vcs: Instance.project.vcs,
+          worktree: Instance.worktree,
+          directory: Instance.directory,
+        })
+      },
+    })
+
+    outro("Done")
+    if (!ok) process.exitCode = 1
+  },
+})

packages/opencode/src/cli/cmd/tui/app.tsx

@@ -1,15 +1,30 @@
-import { render, useKeyboard, useRenderer, useTerminalDimensions } from "@opentui/solid"
+import { render, TimeToFirstDraw, useKeyboard, useRenderer, useTerminalDimensions } from "@opentui/solid"
 import { Clipboard } from "@tui/util/clipboard"
 import { Selection } from "@tui/util/selection"
-import { MouseButton, TextAttributes } from "@opentui/core"
+import { createCliRenderer, MouseButton, type CliRendererConfig } from "@opentui/core"
 import { RouteProvider, useRoute } from "@tui/context/route"
-import { Switch, Match, createEffect, untrack, ErrorBoundary, createSignal, onMount, batch, Show, on } from "solid-js"
-import { win32DisableProcessedInput, win32FlushInputBuffer, win32InstallCtrlCGuard } from "./win32"
+import {
+  Switch,
+  Match,
+  createEffect,
+  createMemo,
+  ErrorBoundary,
+  createSignal,
+  onMount,
+  batch,
+  Show,
+  on,
+  onCleanup,
+} from "solid-js"
+import { win32DisableProcessedInput, win32InstallCtrlCGuard } from "./win32"
 import { Flag } from "@/flag/flag"
 import semver from "semver"
 import { DialogProvider, useDialog } from "@tui/ui/dialog"
 import { DialogProvider as DialogProviderList } from "@tui/component/dialog-provider"
+import { ErrorComponent } from "@tui/component/error-component"
+import { PluginRouteMissing } from "@tui/component/plugin-route-missing"
 import { SDKProvider, useSDK } from "@tui/context/sdk"
+import { StartupLoading } from "@tui/component/startup-loading"
 import { SyncProvider, useSync } from "@tui/context/sync"
 import { LocalProvider, useLocal } from "@tui/context/local"
 import { DialogModel, useConnected } from "@tui/component/dialog-model"
@@ -21,7 +36,7 @@ import { CommandProvider, useCommandDialog } from "@tui/component/dialog-command
 import { DialogAgent } from "@tui/component/dialog-agent"
 import { DialogSessionList } from "@tui/component/dialog-session-list"
 import { DialogWorkspaceList } from "@tui/component/dialog-workspace-list"
-import { KeybindProvider } from "@tui/context/keybind"
+import { KeybindProvider, useKeybind } from "@tui/context/keybind"
 import { ThemeProvider, useTheme } from "@tui/context/theme"
 import { Home } from "@tui/routes/home"
 import { Session } from "@tui/routes/session"
@@ -40,8 +55,10 @@ import { ArgsProvider, useArgs, type Args } from "./context/args"
 import open from "open"
 import { writeHeapSnapshot } from "v8"
 import { PromptRefProvider, usePromptRef } from "./context/prompt"
-import { TuiConfigProvider } from "./context/tui-config"
+import { TuiConfigProvider, useTuiConfig } from "./context/tui-config"
 import { TuiConfig } from "@/config/tui"
+import { createTuiApi, TuiPluginRuntime, type RouteMap } from "./plugin"
+import { FormatError, FormatUnknownError } from "@/cli/error"
 
 async function getTerminalBackgroundColor(): Promise<"dark" | "light"> {
   // can't set raw mode if not a TTY
@@ -104,7 +121,42 @@ async function getTerminalBackgroundColor(): Promise<"dark" | "light"> {
 }
 
 import type { EventSource } from "./context/sdk"
-import { Installation } from "@/installation"
+
+function rendererConfig(_config: TuiConfig.Info): CliRendererConfig {
+  return {
+    targetFps: 60,
+    gatherStats: false,
+    exitOnCtrlC: false,
+    useKittyKeyboard: { events: process.platform === "win32" },
+    autoFocus: false,
+    openConsoleOnError: false,
+    consoleOptions: {
+      keyBindings: [{ name: "y", ctrl: true, action: "copy-selection" }],
+      onCopySelection: (text) => {
+        Clipboard.copy(text).catch((error) => {
+          console.error(`Failed to copy console selection to clipboard: ${error}`)
+        })
+      },
+    },
+  }
+}
+
+function errorMessage(error: unknown) {
+  const formatted = FormatError(error)
+  if (formatted !== undefined) return formatted
+  if (
+    typeof error === "object" &&
+    error !== null &&
+    "data" in error &&
+    typeof error.data === "object" &&
+    error.data !== null &&
+    "message" in error.data &&
+    typeof error.data.message === "string"
+  ) {
+    return error.data.message
+  }
+  return FormatUnknownError(error)
+}
 
 export function tui(input: {
   url: string
@@ -132,77 +184,68 @@ export function tui(input: {
       resolve()
     }
 
-    render(
-      () => {
-        return (
-          <ErrorBoundary
-            fallback={(error, reset) => <ErrorComponent error={error} reset={reset} onExit={onExit} mode={mode} />}
-          >
-            <ArgsProvider {...input.args}>
-              <ExitProvider onExit={onExit}>
-                <KVProvider>
-                  <ToastProvider>
-                    <RouteProvider>
-                      <TuiConfigProvider config={input.config}>
-                        <SDKProvider
-                          url={input.url}
-                          directory={input.directory}
-                          fetch={input.fetch}
-                          headers={input.headers}
-                          events={input.events}
-                        >
-                          <SyncProvider>
-                            <ThemeProvider mode={mode}>
-                              <LocalProvider>
-                                <KeybindProvider>
-                                  <PromptStashProvider>
-                                    <DialogProvider>
-                                      <CommandProvider>
-                                        <FrecencyProvider>
-                                          <PromptHistoryProvider>
-                                            <PromptRefProvider>
-                                              <App onSnapshot={input.onSnapshot} />
-                                            </PromptRefProvider>
-                                          </PromptHistoryProvider>
-                                        </FrecencyProvider>
-                                      </CommandProvider>
-                                    </DialogProvider>
-                                  </PromptStashProvider>
-                                </KeybindProvider>
-                              </LocalProvider>
-                            </ThemeProvider>
-                          </SyncProvider>
-                        </SDKProvider>
-                      </TuiConfigProvider>
-                    </RouteProvider>
-                  </ToastProvider>
-                </KVProvider>
-              </ExitProvider>
-            </ArgsProvider>
-          </ErrorBoundary>
-        )
-      },
-      {
-        targetFps: 60,
-        gatherStats: false,
-        exitOnCtrlC: false,
-        useKittyKeyboard: { events: process.platform === "win32" },
-        autoFocus: false,
-        openConsoleOnError: false,
-        consoleOptions: {
-          keyBindings: [{ name: "y", ctrl: true, action: "copy-selection" }],
-          onCopySelection: (text) => {
-            Clipboard.copy(text).catch((error) => {
-              console.error(`Failed to copy console selection to clipboard: ${error}`)
-            })
-          },
-        },
-      },
-    )
+    const onBeforeExit = async () => {
+      await TuiPluginRuntime.dispose()
+    }
+
+    const renderer = await createCliRenderer(rendererConfig(input.config))
+
+    await render(() => {
+      return (
+        <ErrorBoundary
+          fallback={(error, reset) => (
+            <ErrorComponent error={error} reset={reset} onBeforeExit={onBeforeExit} onExit={onExit} mode={mode} />
+          )}
+        >
+          <ArgsProvider {...input.args}>
+            <ExitProvider onBeforeExit={onBeforeExit} onExit={onExit}>
+              <KVProvider>
+                <ToastProvider>
+                  <RouteProvider>
+                    <TuiConfigProvider config={input.config}>
+                      <SDKProvider
+                        url={input.url}
+                        directory={input.directory}
+                        fetch={input.fetch}
+                        headers={input.headers}
+                        events={input.events}
+                      >
+                        <SyncProvider>
+                          <ThemeProvider mode={mode}>
+                            <LocalProvider>
+                              <KeybindProvider>
+                                <PromptStashProvider>
+                                  <DialogProvider>
+                                    <CommandProvider>
+                                      <FrecencyProvider>
+                                        <PromptHistoryProvider>
+                                          <PromptRefProvider>
+                                            <App onSnapshot={input.onSnapshot} />
+                                          </PromptRefProvider>
+                                        </PromptHistoryProvider>
+                                      </FrecencyProvider>
+                                    </CommandProvider>
+                                  </DialogProvider>
+                                </PromptStashProvider>
+                              </KeybindProvider>
+                            </LocalProvider>
+                          </ThemeProvider>
+                        </SyncProvider>
+                      </SDKProvider>
+                    </TuiConfigProvider>
+                  </RouteProvider>
+                </ToastProvider>
+              </KVProvider>
+            </ExitProvider>
+          </ArgsProvider>
+        </ErrorBoundary>
+      )
+    }, renderer)
   })
 }
 
 function App(props: { onSnapshot?: () => Promise<string[]> }) {
+  const tuiConfig = useTuiConfig()
   const route = useRoute()
   const dimensions = useTerminalDimensions()
   const renderer = useRenderer()
@@ -211,12 +254,47 @@ function App(props: { onSnapshot?: () => Promise<string[]> }) {
   const local = useLocal()
   const kv = useKV()
   const command = useCommandDialog()
+  const keybind = useKeybind()
   const sdk = useSDK()
   const toast = useToast()
-  const { theme, mode, setMode, locked, lock, unlock } = useTheme()
+  const themeState = useTheme()
+  const { theme, mode, setMode, locked, lock, unlock } = themeState
   const sync = useSync()
   const exit = useExit()
   const promptRef = usePromptRef()
+  const routes: RouteMap = new Map()
+  const [routeRev, setRouteRev] = createSignal(0)
+  const routeView = (name: string) => {
+    routeRev()
+    return routes.get(name)?.at(-1)?.render
+  }
+
+  const api = createTuiApi({
+    command,
+    tuiConfig,
+    dialog,
+    keybind,
+    kv,
+    route,
+    routes,
+    bump: () => setRouteRev((x) => x + 1),
+    sdk,
+    sync,
+    theme: themeState,
+    toast,
+    renderer,
+  })
+  onCleanup(() => {
+    api.dispose()
+  })
+  const [ready, setReady] = createSignal(false)
+  TuiPluginRuntime.init(api)
+    .catch((error) => {
+      console.error("Failed to load TUI plugins", error)
+    })
+    .finally(() => {
+      setReady(true)
+    })
 
   useKeyboard((evt) => {
     if (!Flag.OPENCODE_EXPERIMENTAL_DISABLE_COPY_ON_SELECT) return
@@ -259,10 +337,6 @@ function App(props: { onSnapshot?: () => Promise<string[]> }) {
   }
   const [terminalTitleEnabled, setTerminalTitleEnabled] = createSignal(kv.get("terminal_title_enabled", true))
 
-  createEffect(() => {
-    console.log(JSON.stringify(route.data))
-  })
-
   // Update terminal window title based on current route and session
   createEffect(() => {
     if (!terminalTitleEnabled() || Flag.OPENCODE_DISABLE_TERMINAL_TITLE) return
@@ -279,9 +353,13 @@ function App(props: { onSnapshot?: () => Promise<string[]> }) {
         return
       }
 
-      // Truncate title to 40 chars max
       const title = session.title.length > 40 ? session.title.slice(0, 37) + "..." : session.title
       renderer.setTerminalTitle(`OC | ${title}`)
+      return
+    }
+
+    if (route.data.type === "plugin") {
+      renderer.setTerminalTitle(`OC | ${route.data.id}`)
     }
   })
 
@@ -723,17 +801,7 @@ function App(props: { onSnapshot?: () => Promise<string[]> }) {
   sdk.event.on("session.error", (evt) => {
     const error = evt.properties.error
     if (error && typeof error === "object" && error.name === "MessageAbortedError") return
-    const message = (() => {
-      if (!error) return "An error occurred"
-
-      if (typeof error === "object") {
-        const data = error.data
-        if ("message" in data && typeof data.message === "string") {
-          return data.message
-        }
-      }
-      return String(error)
-    })()
+    const message = errorMessage(error)
 
     toast.show({
       variant: "error",
@@ -789,6 +857,14 @@ function App(props: { onSnapshot?: () => Promise<string[]> }) {
     exit()
   })
 
+  const plugin = createMemo(() => {
+    if (!ready()) return
+    if (route.data.type !== "plugin") return
+    const render = routeView(route.data.id)
+    if (!render) return <PluginRouteMissing id={route.data.id} onHome={() => route.navigate({ type: "home" })} />
+    return render({ params: route.data.data })
+  })
+
   return (
     <box
       width={dimensions().width}
@@ -804,97 +880,22 @@ function App(props: { onSnapshot?: () => Promise<string[]> }) {
       }}
       onMouseUp={Flag.OPENCODE_EXPERIMENTAL_DISABLE_COPY_ON_SELECT ? undefined : () => Selection.copy(renderer, toast)}
     >
-      <Switch>
-        <Match when={route.data.type === "home"}>
-          <Home />
-        </Match>
-        <Match when={route.data.type === "session"}>
-          <Session />
-        </Match>
-      </Switch>
-    </box>
-  )
-}
-
-function ErrorComponent(props: {
-  error: Error
-  reset: () => void
-  onExit: () => Promise<void>
-  mode?: "dark" | "light"
-}) {
-  const term = useTerminalDimensions()
-  const renderer = useRenderer()
-
-  const handleExit = async () => {
-    renderer.setTerminalTitle("")
-    renderer.destroy()
-    win32FlushInputBuffer()
-    await props.onExit()
-  }
-
-  useKeyboard((evt) => {
-    if (evt.ctrl && evt.name === "c") {
-      handleExit()
-    }
-  })
-  const [copied, setCopied] = createSignal(false)
-
-  const issueURL = new URL("https://github.com/anomalyco/opencode/issues/new?template=bug-report.yml")
-
-  // Choose safe fallback colors per mode since theme context may not be available
-  const isLight = props.mode === "light"
-  const colors = {
-    bg: isLight ? "#ffffff" : "#0a0a0a",
-    text: isLight ? "#1a1a1a" : "#eeeeee",
-    muted: isLight ? "#8a8a8a" : "#808080",
-    primary: isLight ? "#3b7dd8" : "#fab283",
-  }
-
-  if (props.error.message) {
-    issueURL.searchParams.set("title", `opentui: fatal: ${props.error.message}`)
-  }
-
-  if (props.error.stack) {
-    issueURL.searchParams.set(
-      "description",
-      "```\n" + props.error.stack.substring(0, 6000 - issueURL.toString().length) + "...\n```",
-    )
-  }
-
-  issueURL.searchParams.set("opencode-version", Installation.VERSION)
-
-  const copyIssueURL = () => {
-    Clipboard.copy(issueURL.toString()).then(() => {
-      setCopied(true)
-    })
-  }
-
-  return (
-    <box flexDirection="column" gap={1} backgroundColor={colors.bg}>
-      <box flexDirection="row" gap={1} alignItems="center">
-        <text attributes={TextAttributes.BOLD} fg={colors.text}>
-          Please report an issue.
-        </text>
-        <box onMouseUp={copyIssueURL} backgroundColor={colors.primary} padding={1}>
-          <text attributes={TextAttributes.BOLD} fg={colors.bg}>
-            Copy issue URL (exception info pre-filled)
-          </text>
-        </box>
-        {copied() && <text fg={colors.muted}>Successfully copied</text>}
-      </box>
-      <box flexDirection="row" gap={2} alignItems="center">
-        <text fg={colors.text}>A fatal error occurred!</text>
-        <box onMouseUp={props.reset} backgroundColor={colors.primary} padding={1}>
-          <text fg={colors.bg}>Reset TUI</text>
-        </box>
-        <box onMouseUp={handleExit} backgroundColor={colors.primary} padding={1}>
-          <text fg={colors.bg}>Exit</text>
-        </box>
-      </box>
-      <scrollbox height={Math.floor(term().height * 0.7)}>
-        <text fg={colors.muted}>{props.error.stack}</text>
-      </scrollbox>
-      <text fg={colors.text}>{props.error.message}</text>
+      <Show when={Flag.OPENCODE_SHOW_TTFD}>
+        <TimeToFirstDraw />
+      </Show>
+      <Show when={ready()}>
+        <Switch>
+          <Match when={route.data.type === "home"}>
+            <Home />
+          </Match>
+          <Match when={route.data.type === "session"}>
+            <Session />
+          </Match>
+        </Switch>
+      </Show>
+      {plugin()}
+      <TuiPluginRuntime.Slot name="app" />
+      <StartupLoading ready={ready} />
     </box>
   )
 }

packages/opencode/src/cli/cmd/tui/component/dialog-command.tsx

@@ -4,13 +4,15 @@ import {
   createContext,
   createMemo,
   createSignal,
+  getOwner,
   onCleanup,
+  runWithOwner,
   useContext,
   type Accessor,
   type ParentProps,
 } from "solid-js"
 import { useKeyboard } from "@opentui/solid"
-import { type KeybindKey, useKeybind } from "@tui/context/keybind"
+import { useKeybind } from "@tui/context/keybind"
 
 type Context = ReturnType<typeof init>
 const ctx = createContext<Context>()
@@ -21,7 +23,7 @@ export type Slash = {
 }
 
 export type CommandOption = DialogSelectOption<string> & {
-  keybind?: KeybindKey
+  keybind?: string
   suggested?: boolean
   slash?: Slash
   hidden?: boolean
@@ -29,6 +31,7 @@ export type CommandOption = DialogSelectOption<string> & {
 }
 
 function init() {
+  const root = getOwner()
   const [registrations, setRegistrations] = createSignal<Accessor<CommandOption[]>[]>([])
   const [suspendCount, setSuspendCount] = createSignal(0)
   const dialog = useDialog()
@@ -100,11 +103,32 @@ function init() {
       dialog.replace(() => <DialogCommand options={visibleOptions()} suggestedOptions={suggestedOptions()} />)
     },
     register(cb: () => CommandOption[]) {
-      const results = createMemo(cb)
-      setRegistrations((arr) => [results, ...arr])
-      onCleanup(() => {
-        setRegistrations((arr) => arr.filter((x) => x !== results))
+      const owner = getOwner() ?? root
+      if (!owner) return () => {}
+
+      let list: Accessor<CommandOption[]> | undefined
+
+      // TUI plugins now register commands via an async store that runs outside an active reactive scope.
+      // runWithOwner attaches createMemo/onCleanup to this owner so plugin registrations stay reactive and dispose correctly.
+      runWithOwner(owner, () => {
+        list = createMemo(cb)
+        const ref = list
+        if (!ref) return
+        setRegistrations((arr) => [ref, ...arr])
+        onCleanup(() => {
+          setRegistrations((arr) => arr.filter((x) => x !== ref))
+        })
       })
+
+      if (!list) return () => {}
+      let done = false
+      return () => {
+        if (done) return
+        done = true
+        const ref = list
+        if (!ref) return
+        setRegistrations((arr) => arr.filter((x) => x !== ref))
+      }
     },
   }
   return result

packages/opencode/src/cli/cmd/tui/component/dialog-status.tsx

@@ -16,7 +16,8 @@ export function DialogStatus() {
 
   const plugins = createMemo(() => {
     const list = sync.data.config.plugin ?? []
-    const result = list.map((value) => {
+    const result = list.map((item) => {
+      const value = typeof item === "string" ? item : item[0]
       if (value.startsWith("file://")) {
         const path = fileURLToPath(value)
         const parts = path.split("/")

packages/opencode/src/cli/cmd/tui/component/dialog-workspace-list.tsx

@@ -3,14 +3,22 @@ import { DialogSelect } from "@tui/ui/dialog-select"
 import { useRoute } from "@tui/context/route"
 import { useSync } from "@tui/context/sync"
 import { createEffect, createMemo, createSignal, onMount } from "solid-js"
-import type { Session } from "@opencode-ai/sdk/v2"
+import { createOpencodeClient, type Session } from "@opencode-ai/sdk/v2"
 import { useSDK } from "../context/sdk"
 import { useToast } from "../ui/toast"
 import { useKeybind } from "../context/keybind"
 import { DialogSessionList } from "./workspace/dialog-session-list"
-import { createOpencodeClient } from "@opencode-ai/sdk/v2"
 import { setTimeout as sleep } from "node:timers/promises"
 
+function scoped(sdk: ReturnType<typeof useSDK>, sync: ReturnType<typeof useSync>, workspaceID?: string) {
+  return createOpencodeClient({
+    baseUrl: sdk.url,
+    fetch: sdk.fetch,
+    directory: sync.data.path.directory || sdk.directory,
+    experimental_workspaceID: workspaceID,
+  })
+}
+
 async function openWorkspace(input: {
   dialog: ReturnType<typeof useDialog>
   route: ReturnType<typeof useRoute>
@@ -29,12 +37,7 @@ async function openWorkspace(input: {
     )
   }
 
-  const client = createOpencodeClient({
-    baseUrl: input.sdk.url,
-    fetch: input.sdk.fetch,
-    directory: input.sync.data.path.directory || input.sdk.directory,
-    experimental_workspaceID: input.workspaceID,
-  })
+  const client = scoped(input.sdk, input.sync, input.workspaceID)
   const listed = input.forceCreate ? undefined : await client.session.list({ roots: true, limit: 1 })
   const session = listed?.data?.[0]
   if (session?.id) {
@@ -187,12 +190,7 @@ export function DialogWorkspaceList() {
       await open(workspaceID)
       return
     }
-    const client = createOpencodeClient({
-      baseUrl: sdk.url,
-      fetch: sdk.fetch,
-      directory: sync.data.path.directory || sdk.directory,
-      experimental_workspaceID: workspaceID,
-    })
+    const client = scoped(sdk, sync, workspaceID)
     const listed = await client.session.list({ roots: true, limit: 1 }).catch(() => undefined)
     if (listed?.data?.length) {
       dialog.replace(() => <DialogSessionList workspaceID={workspaceID} />)
@@ -223,12 +221,7 @@ export function DialogWorkspaceList() {
     setCounts(Object.fromEntries(workspaces.map((workspace) => [workspace.id, undefined])))
     void Promise.all(
       workspaces.map(async (workspace) => {
-        const client = createOpencodeClient({
-          baseUrl: sdk.url,
-          fetch: sdk.fetch,
-          directory: sync.data.path.directory || sdk.directory,
-          experimental_workspaceID: workspace.id,
-        })
+        const client = scoped(sdk, sync, workspace.id)
         const result = await client.session.list({ roots: true }).catch(() => undefined)
         return [workspace.id, result ? (result.data?.length ?? 0) : null] as const
       }),

packages/opencode/src/cli/cmd/tui/component/error-component.tsx

@@ -0,0 +1,91 @@
+import { TextAttributes } from "@opentui/core"
+import { useKeyboard, useRenderer, useTerminalDimensions } from "@opentui/solid"
+import { Clipboard } from "@tui/util/clipboard"
+import { createSignal } from "solid-js"
+import { Installation } from "@/installation"
+import { win32FlushInputBuffer } from "../win32"
+
+export function ErrorComponent(props: {
+  error: Error
+  reset: () => void
+  onBeforeExit?: () => Promise<void>
+  onExit: () => Promise<void>
+  mode?: "dark" | "light"
+}) {
+  const term = useTerminalDimensions()
+  const renderer = useRenderer()
+
+  const handleExit = async () => {
+    await props.onBeforeExit?.()
+    renderer.setTerminalTitle("")
+    renderer.destroy()
+    win32FlushInputBuffer()
+    await props.onExit()
+  }
+
+  useKeyboard((evt) => {
+    if (evt.ctrl && evt.name === "c") {
+      handleExit()
+    }
+  })
+  const [copied, setCopied] = createSignal(false)
+
+  const issueURL = new URL("https://github.com/anomalyco/opencode/issues/new?template=bug-report.yml")
+
+  // Choose safe fallback colors per mode since theme context may not be available
+  const isLight = props.mode === "light"
+  const colors = {
+    bg: isLight ? "#ffffff" : "#0a0a0a",
+    text: isLight ? "#1a1a1a" : "#eeeeee",
+    muted: isLight ? "#8a8a8a" : "#808080",
+    primary: isLight ? "#3b7dd8" : "#fab283",
+  }
+
+  if (props.error.message) {
+    issueURL.searchParams.set("title", `opentui: fatal: ${props.error.message}`)
+  }
+
+  if (props.error.stack) {
+    issueURL.searchParams.set(
+      "description",
+      "```\n" + props.error.stack.substring(0, 6000 - issueURL.toString().length) + "...\n```",
+    )
+  }
+
+  issueURL.searchParams.set("opencode-version", Installation.VERSION)
+
+  const copyIssueURL = () => {
+    Clipboard.copy(issueURL.toString()).then(() => {
+      setCopied(true)
+    })
+  }
+
+  return (
+    <box flexDirection="column" gap={1} backgroundColor={colors.bg}>
+      <box flexDirection="row" gap={1} alignItems="center">
+        <text attributes={TextAttributes.BOLD} fg={colors.text}>
+          Please report an issue.
+        </text>
+        <box onMouseUp={copyIssueURL} backgroundColor={colors.primary} padding={1}>
+          <text attributes={TextAttributes.BOLD} fg={colors.bg}>
+            Copy issue URL (exception info pre-filled)
+          </text>
+        </box>
+        {copied() && <text fg={colors.muted}>Successfully copied</text>}
+      </box>
+      <box flexDirection="row" gap={2} alignItems="center">
+        <text fg={colors.text}>A fatal error occurred!</text>
+        <box onMouseUp={props.reset} backgroundColor={colors.primary} padding={1}>
+          <text fg={colors.bg}>Reset TUI</text>
+        </box>
+        <box onMouseUp={handleExit} backgroundColor={colors.primary} padding={1}>
+          <text fg={colors.bg}>Exit</text>
+        </box>
+      </box>
+      <scrollbox height={Math.floor(term().height * 0.7)}>
+        <text fg={colors.muted}>{props.error.stack}</text>
+      </scrollbox>
+      <text fg={colors.text}>{props.error.message}</text>
+    </box>
+  )
+}

packages/opencode/src/cli/cmd/tui/component/plugin-route-missing.tsx

@@ -0,0 +1,14 @@
+import { useTheme } from "../context/theme"
+
+export function PluginRouteMissing(props: { id: string; onHome: () => void }) {
+  const { theme } = useTheme()
+
+  return (
+    <box width="100%" height="100%" alignItems="center" justifyContent="center" flexDirection="column" gap={1}>
+      <text fg={theme.warning}>Unknown plugin route: {props.id}</text>
+      <box onMouseUp={props.onHome} backgroundColor={theme.backgroundElement} paddingLeft={1} paddingRight={1}>
+        <text fg={theme.text}>go home</text>
+      </box>
+    </box>
+  )
+}

packages/opencode/src/cli/cmd/tui/component/startup-loading.tsx

@@ -0,0 +1,63 @@
+import { createEffect, createMemo, createSignal, onCleanup, Show } from "solid-js"
+import { useTheme } from "../context/theme"
+import { Spinner } from "./spinner"
+
+export function StartupLoading(props: { ready: () => boolean }) {
+  const theme = useTheme().theme
+  const [show, setShow] = createSignal(false)
+  const text = createMemo(() => (props.ready() ? "Finishing startup..." : "Loading plugins..."))
+  let wait: NodeJS.Timeout | undefined
+  let hold: NodeJS.Timeout | undefined
+  let stamp = 0
+
+  createEffect(() => {
+    if (props.ready()) {
+      if (wait) {
+        clearTimeout(wait)
+        wait = undefined
+      }
+      if (!show()) return
+      if (hold) return
+
+      const left = 3000 - (Date.now() - stamp)
+      if (left <= 0) {
+        setShow(false)
+        return
+      }
+
+      hold = setTimeout(() => {
+        hold = undefined
+        setShow(false)
+      }, left).unref()
+      return
+    }
+
+    if (hold) {
+      clearTimeout(hold)
+      hold = undefined
+    }
+    if (show()) return
+    if (wait) return
+
+    wait = setTimeout(() => {
+      wait = undefined
+      stamp = Date.now()
+      setShow(true)
+    }, 500).unref()
+  })
+
+  onCleanup(() => {
+    if (wait) clearTimeout(wait)
+    if (hold) clearTimeout(hold)
+  })
+
+  return (
+    <Show when={show()}>
+      <box position="absolute" zIndex={5000} left={0} right={0} bottom={1} justifyContent="center" alignItems="center">
+        <box backgroundColor={theme.backgroundPanel} paddingLeft={1} paddingRight={1}>
+          <Spinner color={theme.textMuted}>{text()}</Spinner>
+        </box>
+      </box>
+    </Show>
+  )
+}

packages/opencode/src/cli/cmd/tui/context/exit.tsx

@@ -12,7 +12,7 @@ type Exit = ((reason?: unknown) => Promise<void>) & {
 
 export const { use: useExit, provider: ExitProvider } = createSimpleContext({
   name: "Exit",
-  init: (input: { onExit?: () => Promise<void> }) => {
+  init: (input: { onBeforeExit?: () => Promise<void>; onExit?: () => Promise<void> }) => {
     const renderer = useRenderer()
     let message: string | undefined
     let task: Promise<void> | undefined
@@ -33,6 +33,7 @@ export const { use: useExit, provider: ExitProvider } = createSimpleContext({
       (reason?: unknown) => {
         if (task) return task
         task = (async () => {
+          await input.onBeforeExit?.()
           // Reset window title before destroying renderer
           renderer.setTerminalTitle("")
           renderer.destroy()

packages/opencode/src/cli/cmd/tui/context/keybind.tsx

@@ -80,21 +80,24 @@ export const { use: useKeybind, provider: KeybindProvider } = createSimpleContex
         }
         return Keybind.fromParsedKey(evt, store.leader)
       },
-      match(key: KeybindKey, evt: ParsedKey) {
-        const keybind = keybinds()[key]
-        if (!keybind) return false
+      match(key: string, evt: ParsedKey) {
+        const list = keybinds()[key] ?? Keybind.parse(key)
+        if (!list.length) return false
         const parsed: Keybind.Info = result.parse(evt)
-        for (const key of keybind) {
-          if (Keybind.match(key, parsed)) {
+        for (const item of list) {
+          if (Keybind.match(item, parsed)) {
             return true
           }
         }
+        return false
       },
-      print(key: KeybindKey) {
-        const first = keybinds()[key]?.at(0)
+      print(key: string) {
+        const first = keybinds()[key]?.at(0) ?? Keybind.parse(key).at(0)
         if (!first) return ""
-        const result = Keybind.toString(first)
-        return result.replace("<leader>", Keybind.toString(keybinds().leader![0]!))
+        const text = Keybind.toString(first)
+        const lead = keybinds().leader?.[0]
+        if (!lead) return text
+        return text.replace("<leader>", Keybind.toString(lead))
       },
     }
     return result

packages/opencode/src/cli/cmd/tui/context/plugin-keybinds.ts

@@ -0,0 +1,41 @@
+import type { ParsedKey } from "@opentui/core"
+
+export type PluginKeybindMap = Record<string, string>
+
+type Base = {
+  match: (key: string, evt: ParsedKey) => boolean
+  print: (key: string) => string
+}
+
+export type PluginKeybind = {
+  readonly all: PluginKeybindMap
+  get: (name: string) => string
+  match: (name: string, evt: ParsedKey) => boolean
+  print: (name: string) => string
+}
+
+const txt = (value: unknown) => {
+  if (typeof value !== "string") return
+  if (!value.trim()) return
+  return value
+}
+
+export function createPluginKeybind(
+  base: Base,
+  defaults: PluginKeybindMap,
+  overrides?: Record<string, unknown>,
+): PluginKeybind {
+  const all = Object.freeze(
+    Object.fromEntries(Object.entries(defaults).map(([name, value]) => [name, txt(overrides?.[name]) ?? value])),
+  )
+  const get = (name: string) => all[name] ?? name
+
+  return {
+    get all() {
+      return all
+    },
+    get,
+    match: (name, evt) => base.match(get(name), evt),
+    print: (name) => base.print(get(name)),
+  }
+}

packages/opencode/src/cli/cmd/tui/context/route.tsx

@@ -14,7 +14,13 @@ export type SessionRoute = {
   initialPrompt?: PromptInfo
 }
 
-export type Route = HomeRoute | SessionRoute
+export type PluginRoute = {
+  type: "plugin"
+  id: string
+  data?: Record<string, unknown>
+}
+
+export type Route = HomeRoute | SessionRoute | PluginRoute
 
 export const { use: useRoute, provider: RouteProvider } = createSimpleContext({
   name: "Route",
@@ -32,7 +38,6 @@ export const { use: useRoute, provider: RouteProvider } = createSimpleContext({
         return store
       },
       navigate(route: Route) {
-        console.log("navigate", route)
         setStore(route)
       },
     }

packages/opencode/src/cli/cmd/tui/context/sdk.tsx

@@ -109,6 +109,9 @@ export const { use: useSDK, provider: SDKProvider } = createSimpleContext({
       get client() {
         return sdk
       },
+      get workspaceID() {
+        return workspaceID
+      },
       directory: props.directory,
       event: emitter,
       fetch: props.fetch ?? fetch,

packages/opencode/src/cli/cmd/tui/context/theme.tsx

@@ -42,66 +42,13 @@ import { createStore, produce } from "solid-js/store"
 import { Global } from "@/global"
 import { Filesystem } from "@/util/filesystem"
 import { useTuiConfig } from "./tui-config"
+import { isRecord } from "@/util/record"
+import type { TuiThemeCurrent } from "@opencode-ai/plugin/tui"
 
-type ThemeColors = {
-  primary: RGBA
-  secondary: RGBA
-  accent: RGBA
-  error: RGBA
-  warning: RGBA
-  success: RGBA
-  info: RGBA
-  text: RGBA
-  textMuted: RGBA
-  selectedListItemText: RGBA
-  background: RGBA
-  backgroundPanel: RGBA
-  backgroundElement: RGBA
-  backgroundMenu: RGBA
-  border: RGBA
-  borderActive: RGBA
-  borderSubtle: RGBA
-  diffAdded: RGBA
-  diffRemoved: RGBA
-  diffContext: RGBA
-  diffHunkHeader: RGBA
-  diffHighlightAdded: RGBA
-  diffHighlightRemoved: RGBA
-  diffAddedBg: RGBA
-  diffRemovedBg: RGBA
-  diffContextBg: RGBA
-  diffLineNumber: RGBA
-  diffAddedLineNumberBg: RGBA
-  diffRemovedLineNumberBg: RGBA
-  markdownText: RGBA
-  markdownHeading: RGBA
-  markdownLink: RGBA
-  markdownLinkText: RGBA
-  markdownCode: RGBA
-  markdownBlockQuote: RGBA
-  markdownEmph: RGBA
-  markdownStrong: RGBA
-  markdownHorizontalRule: RGBA
-  markdownListItem: RGBA
-  markdownListEnumeration: RGBA
-  markdownImage: RGBA
-  markdownImageText: RGBA
-  markdownCodeBlock: RGBA
-  syntaxComment: RGBA
-  syntaxKeyword: RGBA
-  syntaxFunction: RGBA
-  syntaxVariable: RGBA
-  syntaxString: RGBA
-  syntaxNumber: RGBA
-  syntaxType: RGBA
-  syntaxOperator: RGBA
-  syntaxPunctuation: RGBA
-}
-
-type Theme = ThemeColors & {
+type Theme = TuiThemeCurrent & {
   _hasSelectedListItemText: boolean
-  thinkingOpacity: number
 }
+type ThemeColor = Exclude<keyof TuiThemeCurrent, "thinkingOpacity">
 
 export function selectedForeground(theme: Theme, bg?: RGBA): RGBA {
   // If theme explicitly defines selectedListItemText, use it
@@ -128,10 +75,10 @@ type Variant = {
   light: HexColor | RefName
 }
 type ColorValue = HexColor | RefName | Variant | RGBA
-type ThemeJson = {
+export type ThemeJson = {
   $schema?: string
   defs?: Record<string, HexColor | RefName>
-  theme: Omit<Record<keyof ThemeColors, ColorValue>, "selectedListItemText" | "backgroundMenu"> & {
+  theme: Omit<Record<ThemeColor, ColorValue>, "selectedListItemText" | "backgroundMenu"> & {
     selectedListItemText?: ColorValue
     backgroundMenu?: ColorValue
     thinkingOpacity?: number
@@ -174,27 +121,91 @@ export const DEFAULT_THEMES: Record<string, ThemeJson> = {
   carbonfox,
 }
 
-function resolveTheme(theme: ThemeJson, mode: "dark" | "light") {
+type State = {
+  themes: Record<string, ThemeJson>
+  mode: "dark" | "light"
+  lock: "dark" | "light" | undefined
+  active: string
+  ready: boolean
+}
+
+const pluginThemes: Record<string, ThemeJson> = {}
+let customThemes: Record<string, ThemeJson> = {}
+let systemTheme: ThemeJson | undefined
+
+function listThemes() {
+  // Priority: defaults < plugin installs < custom files < generated system.
+  const themes = {
+    ...DEFAULT_THEMES,
+    ...pluginThemes,
+    ...customThemes,
+  }
+  if (!systemTheme) return themes
+  return {
+    ...themes,
+    system: systemTheme,
+  }
+}
+
+function syncThemes() {
+  setStore("themes", listThemes())
+}
+
+const [store, setStore] = createStore<State>({
+  themes: listThemes(),
+  mode: "dark",
+  lock: undefined,
+  active: "opencode",
+  ready: false,
+})
+
+export function allThemes() {
+  return store.themes
+}
+
+function isTheme(theme: unknown): theme is ThemeJson {
+  if (!isRecord(theme)) return false
+  if (!isRecord(theme.theme)) return false
+  return true
+}
+
+export function hasTheme(name: string) {
+  if (!name) return false
+  return allThemes()[name] !== undefined
+}
+
+export function addTheme(name: string, theme: unknown) {
+  if (!name) return false
+  if (!isTheme(theme)) return false
+  if (hasTheme(name)) return false
+  pluginThemes[name] = theme
+  syncThemes()
+  return true
+}
+
+export function resolveTheme(theme: ThemeJson, mode: "dark" | "light") {
   const defs = theme.defs ?? {}
-  function resolveColor(c: ColorValue): RGBA {
+  function resolveColor(c: ColorValue, chain: string[] = []): RGBA {
     if (c instanceof RGBA) return c
     if (typeof c === "string") {
       if (c === "transparent" || c === "none") return RGBA.fromInts(0, 0, 0, 0)
 
       if (c.startsWith("#")) return RGBA.fromHex(c)
 
-      if (defs[c] != null) {
-        return resolveColor(defs[c])
-      } else if (theme.theme[c as keyof ThemeColors] !== undefined) {
-        return resolveColor(theme.theme[c as keyof ThemeColors]!)
-      } else {
+      if (chain.includes(c)) {
+        throw new Error(`Circular color reference: ${[...chain, c].join(" -> ")}`)
+      }
+
+      const next = defs[c] ?? theme.theme[c as ThemeColor]
+      if (next === undefined) {
         throw new Error(`Color reference "${c}" not found in defs or theme`)
       }
+      return resolveColor(next, [...chain, c])
     }
     if (typeof c === "number") {
       return ansiToRgba(c)
     }
-    return resolveColor(c[mode])
+    return resolveColor(c[mode], chain)
   }
 
   const resolved = Object.fromEntries(
@@ -203,7 +214,7 @@ function resolveTheme(theme: ThemeJson, mode: "dark" | "light") {
       .map(([key, value]) => {
         return [key, resolveColor(value as ColorValue)]
       }),
-  ) as Partial<ThemeColors>
+  ) as Partial<Record<ThemeColor, RGBA>>
 
   // Handle selectedListItemText separately since it's optional
   const hasSelectedListItemText = theme.theme.selectedListItemText !== undefined
@@ -287,14 +298,18 @@ export const { use: useTheme, provider: ThemeProvider } = createSimpleContext({
       if (value === "dark" || value === "light") return value
       return
     }
-    const lock = pick(kv.get("theme_mode_lock"))
-    const [store, setStore] = createStore({
-      themes: DEFAULT_THEMES,
-      mode: lock ?? pick(kv.get("theme_mode", props.mode)) ?? props.mode,
-      lock,
-      active: (config.theme ?? kv.get("theme", "opencode")) as string,
-      ready: false,
-    })
+
+    setStore(
+      produce((draft) => {
+        const lock = pick(kv.get("theme_mode_lock"))
+        const mode = pick(kv.get("theme_mode", props.mode))
+        draft.mode = lock ?? mode ?? props.mode
+        draft.lock = lock
+        const active = config.theme ?? kv.get("theme", "opencode")
+        draft.active = typeof active === "string" ? active : "opencode"
+        draft.ready = false
+      }),
+    )
 
     createEffect(() => {
       const theme = config.theme
@@ -302,52 +317,46 @@ export const { use: useTheme, provider: ThemeProvider } = createSimpleContext({
     })
 
     function init() {
-      resolveSystemTheme(store.mode)
-      getCustomThemes()
-        .then((custom) => {
-          setStore(
-            produce((draft) => {
-              Object.assign(draft.themes, custom)
-            }),
-          )
-        })
-        .catch(() => {
-          setStore("active", "opencode")
-        })
-        .finally(() => {
-          if (store.active !== "system") {
-            setStore("ready", true)
-          }
-        })
+      Promise.allSettled([
+        resolveSystemTheme(store.mode),
+        getCustomThemes()
+          .then((custom) => {
+            customThemes = custom
+            syncThemes()
+          })
+          .catch(() => {
+            setStore("active", "opencode")
+          }),
+      ]).finally(() => {
+        setStore("ready", true)
+      })
     }
 
     onMount(init)
 
     function resolveSystemTheme(mode: "dark" | "light" = store.mode) {
-      renderer
+      return renderer
         .getPalette({
           size: 16,
         })
-        .then((colors) => {
+        .then((colors: TerminalColors) => {
           if (!colors.palette[0]) {
+            systemTheme = undefined
+            syncThemes()
             if (store.active === "system") {
-              setStore(
-                produce((draft) => {
-                  draft.active = "opencode"
-                  draft.ready = true
-                }),
-              )
+              setStore("active", "opencode")
             }
             return
           }
-          setStore(
-            produce((draft) => {
-              draft.themes.system = generateSystem(colors, mode)
-              if (store.active === "system") {
-                draft.ready = true
-              }
-            }),
-          )
+          systemTheme = generateSystem(colors, mode)
+          syncThemes()
+        })
+        .catch(() => {
+          systemTheme = undefined
+          syncThemes()
+          if (store.active === "system") {
+            setStore("active", "opencode")
+          }
         })
     }
 
@@ -377,8 +386,16 @@ export const { use: useTheme, provider: ThemeProvider } = createSimpleContext({
       apply(mode)
     }
     renderer.on(CliRenderEvents.THEME_MODE, handle)
+
+    const refresh = () => {
+      renderer.clearPaletteCache()
+      init()
+    }
+    process.on("SIGUSR2", refresh)
+
     onCleanup(() => {
       renderer.off(CliRenderEvents.THEME_MODE, handle)
+      process.off("SIGUSR2", refresh)
     })
 
     const values = createMemo(() => {
@@ -403,7 +420,10 @@ export const { use: useTheme, provider: ThemeProvider } = createSimpleContext({
         return store.active
       },
       all() {
-        return store.themes
+        return allThemes()
+      },
+      has(name: string) {
+        return hasTheme(name)
       },
       syntax,
       subtleSyntax,
@@ -423,8 +443,10 @@ export const { use: useTheme, provider: ThemeProvider } = createSimpleContext({
         pin(mode)
       },
       set(theme: string) {
+        if (!hasTheme(theme)) return false
         setStore("active", theme)
         kv.set("theme", theme)
+        return true
       },
       get ready() {
         return store.ready

packages/opencode/src/cli/cmd/tui/feature-plugins/home/tips-view.tsx

@@ -1,4 +1,4 @@
-import { createMemo, createSignal, For } from "solid-js"
+import { For } from "solid-js"
 import { DEFAULT_THEMES, useTheme } from "@tui/context/theme"
 
 const themeCount = Object.keys(DEFAULT_THEMES).length

packages/opencode/src/cli/cmd/tui/feature-plugins/home/tips.tsx

@@ -0,0 +1,48 @@
+import type { TuiPlugin } from "@opencode-ai/plugin/tui"
+import { createMemo, Show } from "solid-js"
+import { Tips } from "./tips-view"
+
+const id = "internal:home-tips"
+
+function View(props: { show: boolean }) {
+  return (
+    <box height={4} minHeight={0} width="100%" maxWidth={75} alignItems="center" paddingTop={3} flexShrink={1}>
+      <Show when={props.show}>
+        <Tips />
+      </Show>
+    </box>
+  )
+}
+
+const tui: TuiPlugin = async (api) => {
+  api.command.register(() => [
+    {
+      title: api.kv.get("tips_hidden", false) ? "Show tips" : "Hide tips",
+      value: "tips.toggle",
+      keybind: "tips_toggle",
+      category: "System",
+      hidden: api.route.current.name !== "home",
+      onSelect() {
+        api.kv.set("tips_hidden", !api.kv.get("tips_hidden", false))
+        api.ui.dialog.clear()
+      },
+    },
+  ])
+
+  api.slots.register({
+    order: 100,
+    slots: {
+      home_bottom() {
+        const hidden = createMemo(() => api.kv.get("tips_hidden", false))
+        const first = createMemo(() => api.state.session.count() === 0)
+        const show = createMemo(() => !first() && !hidden())
+        return <View show={show()} />
+      },
+    },
+  })
+}
+
+export default {
+  id,
+  tui,
+}

packages/opencode/src/cli/cmd/tui/feature-plugins/sidebar/context.tsx

@@ -0,0 +1,61 @@
+import type { AssistantMessage } from "@opencode-ai/sdk/v2"
+import type { TuiPlugin, TuiPluginApi } from "@opencode-ai/plugin/tui"
+import { createMemo } from "solid-js"
+
+const id = "internal:sidebar-context"
+
+const money = new Intl.NumberFormat("en-US", {
+  style: "currency",
+  currency: "USD",
+})
+
+function View(props: { api: TuiPluginApi; session_id: string }) {
+  const theme = () => props.api.theme.current
+  const msg = createMemo(() => props.api.state.session.messages(props.session_id))
+  const cost = createMemo(() => msg().reduce((sum, item) => sum + (item.role === "assistant" ? item.cost : 0), 0))
+
+  const state = createMemo(() => {
+    const last = msg().findLast((item): item is AssistantMessage => item.role === "assistant" && item.tokens.output > 0)
+    if (!last) {
+      return {
+        tokens: 0,
+        percent: null,
+      }
+    }
+
+    const tokens =
+      last.tokens.input + last.tokens.output + last.tokens.reasoning + last.tokens.cache.read + last.tokens.cache.write
+    const model = props.api.state.provider.find((item) => item.id === last.providerID)?.models[last.modelID]
+    return {
+      tokens,
+      percent: model?.limit.context ? Math.round((tokens / model.limit.context) * 100) : null,
+    }
+  })
+
+  return (
+    <box>
+      <text fg={theme().text}>
+        <b>Context</b>
+      </text>
+      <text fg={theme().textMuted}>{state().tokens.toLocaleString()} tokens</text>
+      <text fg={theme().textMuted}>{state().percent ?? 0}% used</text>
+      <text fg={theme().textMuted}>{money.format(cost())} spent</text>
+    </box>
+  )
+}
+
+const tui: TuiPlugin = async (api) => {
+  api.slots.register({
+    order: 100,
+    slots: {
+      sidebar_content(_ctx, props) {
+        return <View api={api} session_id={props.session_id} />
+      },
+    },
+  })
+}
+
+export default {
+  id,
+  tui,
+}

packages/opencode/src/cli/cmd/tui/feature-plugins/sidebar/files.tsx

@@ -0,0 +1,60 @@
+import type { TuiPlugin, TuiPluginApi } from "@opencode-ai/plugin/tui"
+import { createMemo, For, Show, createSignal } from "solid-js"
+
+const id = "internal:sidebar-files"
+
+function View(props: { api: TuiPluginApi; session_id: string }) {
+  const [open, setOpen] = createSignal(true)
+  const theme = () => props.api.theme.current
+  const list = createMemo(() => props.api.state.session.diff(props.session_id))
+
+  return (
+    <Show when={list().length > 0}>
+      <box>
+        <box flexDirection="row" gap={1} onMouseDown={() => list().length > 2 && setOpen((x) => !x)}>
+          <Show when={list().length > 2}>
+            <text fg={theme().text}>{open() ? "▼" : "▶"}</text>
+          </Show>
+          <text fg={theme().text}>
+            <b>Modified Files</b>
+          </text>
+        </box>
+        <Show when={list().length <= 2 || open()}>
+          <For each={list()}>
+            {(item) => (
+              <box flexDirection="row" gap={1} justifyContent="space-between">
+                <text fg={theme().textMuted} wrapMode="none">
+                  {item.file}
+                </text>
+                <box flexDirection="row" gap={1} flexShrink={0}>
+                  <Show when={item.additions}>
+                    <text fg={theme().diffAdded}>+{item.additions}</text>
+                  </Show>
+                  <Show when={item.deletions}>
+                    <text fg={theme().diffRemoved}>-{item.deletions}</text>
+                  </Show>
+                </box>
+              </box>
+            )}
+          </For>
+        </Show>
+      </box>
+    </Show>
+  )
+}
+
+const tui: TuiPlugin = async (api) => {
+  api.slots.register({
+    order: 500,
+    slots: {
+      sidebar_content(_ctx, props) {
+        return <View api={api} session_id={props.session_id} />
+      },
+    },
+  })
+}
+
+export default {
+  id,
+  tui,
+}

packages/opencode/src/cli/cmd/tui/feature-plugins/sidebar/footer.tsx

@@ -0,0 +1,91 @@
+import type { TuiPlugin, TuiPluginApi } from "@opencode-ai/plugin/tui"
+import { createMemo, Show } from "solid-js"
+import { Global } from "@/global"
+
+const id = "internal:sidebar-footer"
+
+function View(props: { api: TuiPluginApi }) {
+  const theme = () => props.api.theme.current
+  const has = createMemo(() =>
+    props.api.state.provider.some(
+      (item) => item.id !== "opencode" || Object.values(item.models).some((model) => model.cost?.input !== 0),
+    ),
+  )
+  const done = createMemo(() => props.api.kv.get("dismissed_getting_started", false))
+  const show = createMemo(() => !has() && !done())
+  const path = createMemo(() => {
+    const dir = props.api.state.path.directory || process.cwd()
+    const out = dir.replace(Global.Path.home, "~")
+    const text = props.api.state.vcs?.branch ? out + ":" + props.api.state.vcs.branch : out
+    const list = text.split("/")
+    return {
+      parent: list.slice(0, -1).join("/"),
+      name: list.at(-1) ?? "",
+    }
+  })
+
+  return (
+    <box gap={1}>
+      <Show when={show()}>
+        <box
+          backgroundColor={theme().backgroundElement}
+          paddingTop={1}
+          paddingBottom={1}
+          paddingLeft={2}
+          paddingRight={2}
+          flexDirection="row"
+          gap={1}
+        >
+          <text flexShrink={0} fg={theme().text}>
+            ⬖
+          </text>
+          <box flexGrow={1} gap={1}>
+            <box flexDirection="row" justifyContent="space-between">
+              <text fg={theme().text}>
+                <b>Getting started</b>
+              </text>
+              <text fg={theme().textMuted} onMouseDown={() => props.api.kv.set("dismissed_getting_started", true)}>
+                ✕
+              </text>
+            </box>
+            <text fg={theme().textMuted}>OpenCode includes free models so you can start immediately.</text>
+            <text fg={theme().textMuted}>
+              Connect from 75+ providers to use other models, including Claude, GPT, Gemini etc
+            </text>
+            <box flexDirection="row" gap={1} justifyContent="space-between">
+              <text fg={theme().text}>Connect provider</text>
+              <text fg={theme().textMuted}>/connect</text>
+            </box>
+          </box>
+        </box>
+      </Show>
+      <text>
+        <span style={{ fg: theme().textMuted }}>{path().parent}/</span>
+        <span style={{ fg: theme().text }}>{path().name}</span>
+      </text>
+      <text fg={theme().textMuted}>
+        <span style={{ fg: theme().success }}>•</span> <b>Open</b>
+        <span style={{ fg: theme().text }}>
+          <b>Code</b>
+        </span>{" "}
+        <span>{props.api.app.version}</span>
+      </text>
+    </box>
+  )
+}
+
+const tui: TuiPlugin = async (api) => {
+  api.slots.register({
+    order: 100,
+    slots: {
+      sidebar_footer() {
+        return <View api={api} />
+      },
+    },
+  })
+}
+
+export default {
+  id,
+  tui,
+}

packages/opencode/src/cli/cmd/tui/feature-plugins/sidebar/lsp.tsx

@@ -0,0 +1,64 @@
+import type { TuiPlugin, TuiPluginApi } from "@opencode-ai/plugin/tui"
+import { createMemo, For, Show, createSignal } from "solid-js"
+
+const id = "internal:sidebar-lsp"
+
+function View(props: { api: TuiPluginApi }) {
+  const [open, setOpen] = createSignal(true)
+  const theme = () => props.api.theme.current
+  const list = createMemo(() => props.api.state.lsp())
+  const off = createMemo(() => props.api.state.config.lsp === false)
+
+  return (
+    <box>
+      <box flexDirection="row" gap={1} onMouseDown={() => list().length > 2 && setOpen((x) => !x)}>
+        <Show when={list().length > 2}>
+          <text fg={theme().text}>{open() ? "▼" : "▶"}</text>
+        </Show>
+        <text fg={theme().text}>
+          <b>LSP</b>
+        </text>
+      </box>
+      <Show when={list().length <= 2 || open()}>
+        <Show when={list().length === 0}>
+          <text fg={theme().textMuted}>
+            {off() ? "LSPs have been disabled in settings" : "LSPs will activate as files are read"}
+          </text>
+        </Show>
+        <For each={list()}>
+          {(item) => (
+            <box flexDirection="row" gap={1}>
+              <text
+                flexShrink={0}
+                style={{
+                  fg: item.status === "connected" ? theme().success : theme().error,
+                }}
+              >
+                •
+              </text>
+              <text fg={theme().textMuted}>
+                {item.id} {item.root}
+              </text>
+            </box>
+          )}
+        </For>
+      </Show>
+    </box>
+  )
+}
+
+const tui: TuiPlugin = async (api) => {
+  api.slots.register({
+    order: 300,
+    slots: {
+      sidebar_content() {
+        return <View api={api} />
+      },
+    },
+  })
+}
+
+export default {
+  id,
+  tui,
+}

packages/opencode/src/cli/cmd/tui/feature-plugins/sidebar/mcp.tsx

@@ -0,0 +1,94 @@
+import type { TuiPlugin, TuiPluginApi } from "@opencode-ai/plugin/tui"
+import { createMemo, For, Match, Show, Switch, createSignal } from "solid-js"
+
+const id = "internal:sidebar-mcp"
+
+function View(props: { api: TuiPluginApi }) {
+  const [open, setOpen] = createSignal(true)
+  const theme = () => props.api.theme.current
+  const list = createMemo(() => props.api.state.mcp())
+  const on = createMemo(() => list().filter((item) => item.status === "connected").length)
+  const bad = createMemo(
+    () =>
+      list().filter(
+        (item) =>
+          item.status === "failed" || item.status === "needs_auth" || item.status === "needs_client_registration",
+      ).length,
+  )
+
+  const dot = (status: string) => {
+    if (status === "connected") return theme().success
+    if (status === "failed") return theme().error
+    if (status === "disabled") return theme().textMuted
+    if (status === "needs_auth") return theme().warning
+    if (status === "needs_client_registration") return theme().error
+    return theme().textMuted
+  }
+
+  return (
+    <Show when={list().length > 0}>
+      <box>
+        <box flexDirection="row" gap={1} onMouseDown={() => list().length > 2 && setOpen((x) => !x)}>
+          <Show when={list().length > 2}>
+            <text fg={theme().text}>{open() ? "▼" : "▶"}</text>
+          </Show>
+          <text fg={theme().text}>
+            <b>MCP</b>
+            <Show when={!open()}>
+              <span style={{ fg: theme().textMuted }}>
+                {" "}
+                ({on()} active{bad() > 0 ? `, ${bad()} error${bad() > 1 ? "s" : ""}` : ""})
+              </span>
+            </Show>
+          </text>
+        </box>
+        <Show when={list().length <= 2 || open()}>
+          <For each={list()}>
+            {(item) => (
+              <box flexDirection="row" gap={1}>
+                <text
+                  flexShrink={0}
+                  style={{
+                    fg: dot(item.status),
+                  }}
+                >
+                  •
+                </text>
+                <text fg={theme().text} wrapMode="word">
+                  {item.name}{" "}
+                  <span style={{ fg: theme().textMuted }}>
+                    <Switch fallback={item.status}>
+                      <Match when={item.status === "connected"}>Connected</Match>
+                      <Match when={item.status === "failed"}>
+                        <i>{item.error}</i>
+                      </Match>
+                      <Match when={item.status === "disabled"}>Disabled</Match>
+                      <Match when={item.status === "needs_auth"}>Needs auth</Match>
+                      <Match when={item.status === "needs_client_registration"}>Needs client ID</Match>
+                    </Switch>
+                  </span>
+                </text>
+              </box>
+            )}
+          </For>
+        </Show>
+      </box>
+    </Show>
+  )
+}
+
+const tui: TuiPlugin = async (api) => {
+  api.slots.register({
+    order: 200,
+    slots: {
+      sidebar_content() {
+        return <View api={api} />
+      },
+    },
+  })
+}
+
+export default {
+  id,
+  tui,
+}

packages/opencode/src/cli/cmd/tui/feature-plugins/sidebar/todo.tsx

@@ -0,0 +1,46 @@
+import type { TuiPlugin, TuiPluginApi } from "@opencode-ai/plugin/tui"
+import { createMemo, For, Show, createSignal } from "solid-js"
+import { TodoItem } from "../../component/todo-item"
+
+const id = "internal:sidebar-todo"
+
+function View(props: { api: TuiPluginApi; session_id: string }) {
+  const [open, setOpen] = createSignal(true)
+  const theme = () => props.api.theme.current
+  const list = createMemo(() => props.api.state.session.todo(props.session_id))
+  const show = createMemo(() => list().length > 0 && list().some((item) => item.status !== "completed"))
+
+  return (
+    <Show when={show()}>
+      <box>
+        <box flexDirection="row" gap={1} onMouseDown={() => list().length > 2 && setOpen((x) => !x)}>
+          <Show when={list().length > 2}>
+            <text fg={theme().text}>{open() ? "▼" : "▶"}</text>
+          </Show>
+          <text fg={theme().text}>
+            <b>Todo</b>
+          </text>
+        </box>
+        <Show when={list().length <= 2 || open()}>
+          <For each={list()}>{(item) => <TodoItem status={item.status} content={item.content} />}</For>
+        </Show>
+      </box>
+    </Show>
+  )
+}
+
+const tui: TuiPlugin = async (api) => {
+  api.slots.register({
+    order: 400,
+    slots: {
+      sidebar_content(_ctx, props) {
+        return <View api={api} session_id={props.session_id} />
+      },
+    },
+  })
+}
+
+export default {
+  id,
+  tui,
+}

packages/opencode/src/cli/cmd/tui/feature-plugins/system/plugins.tsx

@@ -0,0 +1,262 @@
+import { Keybind } from "@/util/keybind"
+import type { TuiPlugin, TuiPluginApi, TuiPluginStatus } from "@opencode-ai/plugin/tui"
+import { useKeyboard, useTerminalDimensions } from "@opentui/solid"
+import { fileURLToPath } from "url"
+import { DialogSelect, type DialogSelectOption } from "@tui/ui/dialog-select"
+import { createEffect, createMemo, createSignal } from "solid-js"
+
+const id = "internal:plugin-manager"
+const key = Keybind.parse("space").at(0)
+const add = Keybind.parse("shift+i").at(0)
+const tab = Keybind.parse("tab").at(0)
+
+function state(api: TuiPluginApi, item: TuiPluginStatus) {
+  if (!item.enabled) {
+    return <span style={{ fg: api.theme.current.textMuted }}>disabled</span>
+  }
+
+  return (
+    <span style={{ fg: item.active ? api.theme.current.success : api.theme.current.error }}>
+      {item.active ? "active" : "inactive"}
+    </span>
+  )
+}
+
+function source(spec: string) {
+  if (!spec.startsWith("file://")) return
+  return fileURLToPath(spec)
+}
+
+function meta(item: TuiPluginStatus, width: number) {
+  if (item.source === "internal") {
+    if (width >= 120) return "Built-in plugin"
+    return "Built-in"
+  }
+  const next = source(item.spec)
+  if (next) return next
+  return item.spec
+}
+
+function Install(props: { api: TuiPluginApi }) {
+  const [global, setGlobal] = createSignal(false)
+  const [busy, setBusy] = createSignal(false)
+
+  useKeyboard((evt) => {
+    if (evt.name !== "tab") return
+    evt.preventDefault()
+    evt.stopPropagation()
+    if (busy()) return
+    setGlobal((x) => !x)
+  })
+
+  return (
+    <props.api.ui.DialogPrompt
+      title="Install plugin"
+      placeholder="npm package name"
+      description={() => (
+        <box flexDirection="row" gap={1}>
+          <text fg={props.api.theme.current.textMuted}>scope:</text>
+          <text fg={props.api.theme.current.text}>{global() ? "global" : "local"}</text>
+          <text fg={props.api.theme.current.textMuted}>({Keybind.toString(tab)} toggle)</text>
+        </box>
+      )}
+      onConfirm={(raw) => {
+        if (busy()) return
+        const mod = raw.trim()
+        if (!mod) {
+          props.api.ui.toast({
+            variant: "error",
+            message: "Plugin package name is required",
+          })
+          return
+        }
+
+        setBusy(true)
+        props.api.plugins
+          .install(mod, { global: global() })
+          .then((out) => {
+            if (!out.ok) {
+              props.api.ui.toast({
+                variant: "error",
+                message: out.message,
+              })
+              if (out.missing) {
+                props.api.ui.toast({
+                  variant: "info",
+                  message: "Check npm registry/auth settings and try again.",
+                })
+              }
+              show(props.api)
+              return
+            }
+
+            props.api.ui.toast({
+              variant: "success",
+              message: `Installed ${mod} (${global() ? "global" : "local"}: ${out.dir})`,
+            })
+            if (!out.tui) {
+              props.api.ui.toast({
+                variant: "info",
+                message: "Package has no TUI target to load in this app.",
+              })
+              show(props.api)
+              return
+            }
+
+            return props.api.plugins.add(mod).then((ok) => {
+              if (!ok) {
+                props.api.ui.toast({
+                  variant: "warning",
+                  message: "Installed plugin, but runtime load failed. See console/logs; restart TUI to retry.",
+                })
+                show(props.api)
+                return
+              }
+
+              props.api.ui.toast({
+                variant: "success",
+                message: `Loaded ${mod} in current session.`,
+              })
+              show(props.api)
+            })
+          })
+          .finally(() => {
+            setBusy(false)
+          })
+      }}
+      onCancel={() => {
+        show(props.api)
+      }}
+    />
+  )
+}
+
+function row(api: TuiPluginApi, item: TuiPluginStatus, width: number): DialogSelectOption<string> {
+  return {
+    title: item.id,
+    value: item.id,
+    category: item.source === "internal" ? "Internal" : "External",
+    description: meta(item, width),
+    footer: state(api, item),
+    disabled: item.id === id,
+  }
+}
+
+function showInstall(api: TuiPluginApi) {
+  api.ui.dialog.replace(() => <Install api={api} />)
+}
+
+function View(props: { api: TuiPluginApi }) {
+  const size = useTerminalDimensions()
+  const [list, setList] = createSignal(props.api.plugins.list())
+  const [cur, setCur] = createSignal<string | undefined>()
+  const [lock, setLock] = createSignal(false)
+
+  createEffect(() => {
+    const width = size().width
+    if (width >= 128) {
+      props.api.ui.dialog.setSize("xlarge")
+      return
+    }
+    if (width >= 96) {
+      props.api.ui.dialog.setSize("large")
+      return
+    }
+    props.api.ui.dialog.setSize("medium")
+  })
+
+  const rows = createMemo(() =>
+    [...list()]
+      .sort((a, b) => {
+        const x = a.source === "internal" ? 1 : 0
+        const y = b.source === "internal" ? 1 : 0
+        if (x !== y) return x - y
+        return a.id.localeCompare(b.id)
+      })
+      .map((item) => row(props.api, item, size().width)),
+  )
+
+  const flip = (x: string) => {
+    if (lock()) return
+    const item = list().find((entry) => entry.id === x)
+    if (!item) return
+    setLock(true)
+    const task = item.active ? props.api.plugins.deactivate(x) : props.api.plugins.activate(x)
+    task
+      .then((ok) => {
+        if (!ok) {
+          props.api.ui.toast({
+            variant: "error",
+            message: `Failed to update plugin ${item.id}`,
+          })
+        }
+        setList(props.api.plugins.list())
+      })
+      .finally(() => {
+        setLock(false)
+      })
+  }
+
+  return (
+    <DialogSelect
+      title="Plugins"
+      options={rows()}
+      current={cur()}
+      onMove={(item) => setCur(item.value)}
+      keybind={[
+        {
+          title: "toggle",
+          keybind: key,
+          disabled: lock(),
+          onTrigger: (item) => {
+            setCur(item.value)
+            flip(item.value)
+          },
+        },
+        {
+          title: "install",
+          keybind: add,
+          disabled: lock(),
+          onTrigger: () => {
+            showInstall(props.api)
+          },
+        },
+      ]}
+      onSelect={(item) => {
+        setCur(item.value)
+        flip(item.value)
+      }}
+    />
+  )
+}
+
+function show(api: TuiPluginApi) {
+  api.ui.dialog.replace(() => <View api={api} />)
+}
+
+const tui: TuiPlugin = async (api) => {
+  api.command.register(() => [
+    {
+      title: "Plugins",
+      value: "plugins.list",
+      keybind: "plugin_manager",
+      category: "System",
+      onSelect() {
+        show(api)
+      },
+    },
+    {
+      title: "Install plugin",
+      value: "plugins.install",
+      category: "System",
+      onSelect() {
+        showInstall(api)
+      },
+    },
+  ])
+}
+
+export default {
+  id,
+  tui,
+}

packages/opencode/src/cli/cmd/tui/plugin/api.tsx

@@ -0,0 +1,406 @@
+import type { ParsedKey } from "@opentui/core"
+import type { TuiDialogSelectOption, TuiPluginApi, TuiRouteDefinition } from "@opencode-ai/plugin/tui"
+import type { useCommandDialog } from "@tui/component/dialog-command"
+import type { useKeybind } from "@tui/context/keybind"
+import type { useRoute } from "@tui/context/route"
+import type { useSDK } from "@tui/context/sdk"
+import type { useSync } from "@tui/context/sync"
+import type { useTheme } from "@tui/context/theme"
+import { Dialog as DialogUI, type useDialog } from "@tui/ui/dialog"
+import type { TuiConfig } from "@/config/tui"
+import { createPluginKeybind } from "../context/plugin-keybinds"
+import type { useKV } from "../context/kv"
+import { DialogAlert } from "../ui/dialog-alert"
+import { DialogConfirm } from "../ui/dialog-confirm"
+import { DialogPrompt } from "../ui/dialog-prompt"
+import { DialogSelect, type DialogSelectOption as SelectOption } from "../ui/dialog-select"
+import type { useToast } from "../ui/toast"
+import { Installation } from "@/installation"
+import { createOpencodeClient, type OpencodeClient } from "@opencode-ai/sdk/v2"
+
+type RouteEntry = {
+  key: symbol
+  render: TuiRouteDefinition["render"]
+}
+
+export type RouteMap = Map<string, RouteEntry[]>
+
+type Input = {
+  command: ReturnType<typeof useCommandDialog>
+  tuiConfig: TuiConfig.Info
+  dialog: ReturnType<typeof useDialog>
+  keybind: ReturnType<typeof useKeybind>
+  kv: ReturnType<typeof useKV>
+  route: ReturnType<typeof useRoute>
+  routes: RouteMap
+  bump: () => void
+  sdk: ReturnType<typeof useSDK>
+  sync: ReturnType<typeof useSync>
+  theme: ReturnType<typeof useTheme>
+  toast: ReturnType<typeof useToast>
+  renderer: TuiPluginApi["renderer"]
+}
+
+type TuiHostPluginApi = TuiPluginApi & {
+  map: Map<string | undefined, OpencodeClient>
+  dispose: () => void
+}
+
+function routeRegister(routes: RouteMap, list: TuiRouteDefinition[], bump: () => void) {
+  const key = Symbol()
+  for (const item of list) {
+    const prev = routes.get(item.name) ?? []
+    prev.push({ key, render: item.render })
+    routes.set(item.name, prev)
+  }
+  bump()
+
+  return () => {
+    for (const item of list) {
+      const prev = routes.get(item.name)
+      if (!prev) continue
+      const next = prev.filter((x) => x.key !== key)
+      if (!next.length) {
+        routes.delete(item.name)
+        continue
+      }
+      routes.set(item.name, next)
+    }
+    bump()
+  }
+}
+
+function routeNavigate(route: ReturnType<typeof useRoute>, name: string, params?: Record<string, unknown>) {
+  if (name === "home") {
+    route.navigate({ type: "home" })
+    return
+  }
+
+  if (name === "session") {
+    const sessionID = params?.sessionID
+    if (typeof sessionID !== "string") return
+    route.navigate({ type: "session", sessionID })
+    return
+  }
+
+  route.navigate({ type: "plugin", id: name, data: params })
+}
+
+function routeCurrent(route: ReturnType<typeof useRoute>): TuiPluginApi["route"]["current"] {
+  if (route.data.type === "home") return { name: "home" }
+  if (route.data.type === "session") {
+    return {
+      name: "session",
+      params: {
+        sessionID: route.data.sessionID,
+        initialPrompt: route.data.initialPrompt,
+      },
+    }
+  }
+
+  return {
+    name: route.data.id,
+    params: route.data.data,
+  }
+}
+
+function mapOption<Value>(item: TuiDialogSelectOption<Value>): SelectOption<Value> {
+  return {
+    ...item,
+    onSelect: () => item.onSelect?.(),
+  }
+}
+
+function pickOption<Value>(item: SelectOption<Value>): TuiDialogSelectOption<Value> {
+  return {
+    title: item.title,
+    value: item.value,
+    description: item.description,
+    footer: item.footer,
+    category: item.category,
+    disabled: item.disabled,
+  }
+}
+
+function mapOptionCb<Value>(cb?: (item: TuiDialogSelectOption<Value>) => void) {
+  if (!cb) return
+  return (item: SelectOption<Value>) => cb(pickOption(item))
+}
+
+function stateApi(sync: ReturnType<typeof useSync>): TuiPluginApi["state"] {
+  return {
+    get ready() {
+      return sync.ready
+    },
+    get config() {
+      return sync.data.config
+    },
+    get provider() {
+      return sync.data.provider
+    },
+    get path() {
+      return sync.data.path
+    },
+    get vcs() {
+      if (!sync.data.vcs) return
+      return {
+        branch: sync.data.vcs.branch,
+      }
+    },
+    workspace: {
+      list() {
+        return sync.data.workspaceList
+      },
+      get(workspaceID) {
+        return sync.workspace.get(workspaceID)
+      },
+    },
+    session: {
+      count() {
+        return sync.data.session.length
+      },
+      diff(sessionID) {
+        return sync.data.session_diff[sessionID] ?? []
+      },
+      todo(sessionID) {
+        return sync.data.todo[sessionID] ?? []
+      },
+      messages(sessionID) {
+        return sync.data.message[sessionID] ?? []
+      },
+      status(sessionID) {
+        return sync.data.session_status[sessionID]
+      },
+      permission(sessionID) {
+        return sync.data.permission[sessionID] ?? []
+      },
+      question(sessionID) {
+        return sync.data.question[sessionID] ?? []
+      },
+    },
+    part(messageID) {
+      return sync.data.part[messageID] ?? []
+    },
+    lsp() {
+      return sync.data.lsp.map((item) => ({ id: item.id, root: item.root, status: item.status }))
+    },
+    mcp() {
+      return Object.entries(sync.data.mcp)
+        .sort(([a], [b]) => a.localeCompare(b))
+        .map(([name, item]) => ({
+          name,
+          status: item.status,
+          error: item.status === "failed" ? item.error : undefined,
+        }))
+    },
+  }
+}
+
+function appApi(): TuiPluginApi["app"] {
+  return {
+    get version() {
+      return Installation.VERSION
+    },
+  }
+}
+
+export function createTuiApi(input: Input): TuiHostPluginApi {
+  const map = new Map<string | undefined, OpencodeClient>()
+  const scoped: TuiPluginApi["scopedClient"] = (workspaceID) => {
+    const hit = map.get(workspaceID)
+    if (hit) return hit
+
+    const next = createOpencodeClient({
+      baseUrl: input.sdk.url,
+      fetch: input.sdk.fetch,
+      directory: input.sync.data.path.directory || input.sdk.directory,
+      experimental_workspaceID: workspaceID,
+    })
+    map.set(workspaceID, next)
+    return next
+  }
+  const workspace: TuiPluginApi["workspace"] = {
+    current() {
+      return input.sdk.workspaceID
+    },
+    set(workspaceID) {
+      input.sdk.setWorkspace(workspaceID)
+    },
+  }
+  const lifecycle: TuiPluginApi["lifecycle"] = {
+    signal: new AbortController().signal,
+    onDispose() {
+      return () => {}
+    },
+  }
+
+  return {
+    app: appApi(),
+    command: {
+      register(cb) {
+        return input.command.register(() => cb())
+      },
+      trigger(value) {
+        input.command.trigger(value)
+      },
+    },
+    route: {
+      register(list) {
+        return routeRegister(input.routes, list, input.bump)
+      },
+      navigate(name, params) {
+        routeNavigate(input.route, name, params)
+      },
+      get current() {
+        return routeCurrent(input.route)
+      },
+    },
+    ui: {
+      Dialog(props) {
+        return (
+          <DialogUI size={props.size} onClose={props.onClose}>
+            {props.children}
+          </DialogUI>
+        )
+      },
+      DialogAlert(props) {
+        return <DialogAlert {...props} />
+      },
+      DialogConfirm(props) {
+        return <DialogConfirm {...props} />
+      },
+      DialogPrompt(props) {
+        return <DialogPrompt {...props} description={props.description} />
+      },
+      DialogSelect(props) {
+        return (
+          <DialogSelect
+            title={props.title}
+            placeholder={props.placeholder}
+            options={props.options.map(mapOption)}
+            flat={props.flat}
+            onMove={mapOptionCb(props.onMove)}
+            onFilter={props.onFilter}
+            onSelect={mapOptionCb(props.onSelect)}
+            skipFilter={props.skipFilter}
+            current={props.current}
+          />
+        )
+      },
+      toast(inputToast) {
+        input.toast.show({
+          title: inputToast.title,
+          message: inputToast.message,
+          variant: inputToast.variant ?? "info",
+          duration: inputToast.duration,
+        })
+      },
+      dialog: {
+        replace(render, onClose) {
+          input.dialog.replace(render, onClose)
+        },
+        clear() {
+          input.dialog.clear()
+        },
+        setSize(size) {
+          input.dialog.setSize(size)
+        },
+        get size() {
+          return input.dialog.size
+        },
+        get depth() {
+          return input.dialog.stack.length
+        },
+        get open() {
+          return input.dialog.stack.length > 0
+        },
+      },
+    },
+    keybind: {
+      match(key, evt: ParsedKey) {
+        return input.keybind.match(key, evt)
+      },
+      print(key) {
+        return input.keybind.print(key)
+      },
+      create(defaults, overrides) {
+        return createPluginKeybind(input.keybind, defaults, overrides)
+      },
+    },
+    get tuiConfig() {
+      return input.tuiConfig
+    },
+    kv: {
+      get(key, fallback) {
+        return input.kv.get(key, fallback)
+      },
+      set(key, value) {
+        input.kv.set(key, value)
+      },
+      get ready() {
+        return input.kv.ready
+      },
+    },
+    state: stateApi(input.sync),
+    get client() {
+      return input.sdk.client
+    },
+    scopedClient: scoped,
+    workspace,
+    event: input.sdk.event,
+    renderer: input.renderer,
+    slots: {
+      register() {
+        throw new Error("slots.register is only available in plugin context")
+      },
+    },
+    plugins: {
+      list() {
+        return []
+      },
+      async activate() {
+        return false
+      },
+      async deactivate() {
+        return false
+      },
+      async add() {
+        return false
+      },
+      async install() {
+        return {
+          ok: false,
+          message: "plugins.install is only available in plugin context",
+        }
+      },
+    },
+    lifecycle,
+    theme: {
+      get current() {
+        return input.theme.theme
+      },
+      get selected() {
+        return input.theme.selected
+      },
+      has(name) {
+        return input.theme.has(name)
+      },
+      set(name) {
+        return input.theme.set(name)
+      },
+      async install(_jsonPath) {
+        throw new Error("theme.install is only available in plugin context")
+      },
+      mode() {
+        return input.theme.mode()
+      },
+      get ready() {
+        return input.theme.ready
+      },
+    },
+    map,
+    dispose() {
+      map.clear()
+    },
+  }
+}

packages/opencode/src/cli/cmd/tui/plugin/index.ts

@@ -0,0 +1,3 @@
+export { TuiPluginRuntime } from "./runtime"
+export { createTuiApi } from "./api"
+export type { RouteMap } from "./api"

packages/opencode/src/cli/cmd/tui/plugin/internal.ts

@@ -0,0 +1,25 @@
+import HomeTips from "../feature-plugins/home/tips"
+import SidebarContext from "../feature-plugins/sidebar/context"
+import SidebarMcp from "../feature-plugins/sidebar/mcp"
+import SidebarLsp from "../feature-plugins/sidebar/lsp"
+import SidebarTodo from "../feature-plugins/sidebar/todo"
+import SidebarFiles from "../feature-plugins/sidebar/files"
+import SidebarFooter from "../feature-plugins/sidebar/footer"
+import PluginManager from "../feature-plugins/system/plugins"
+import type { TuiPlugin, TuiPluginModule } from "@opencode-ai/plugin/tui"
+
+export type InternalTuiPlugin = TuiPluginModule & {
+  id: string
+  tui: TuiPlugin
+}
+
+export const INTERNAL_TUI_PLUGINS: InternalTuiPlugin[] = [
+  HomeTips,
+  SidebarContext,
+  SidebarMcp,
+  SidebarLsp,
+  SidebarTodo,
+  SidebarFiles,
+  SidebarFooter,
+  PluginManager,
+]

packages/opencode/src/cli/cmd/tui/plugin/runtime.ts

@@ -0,0 +1,972 @@
+import "@opentui/solid/runtime-plugin-support"
+import {
+  type TuiDispose,
+  type TuiPlugin,
+  type TuiPluginApi,
+  type TuiPluginInstallResult,
+  type TuiPluginModule,
+  type TuiPluginMeta,
+  type TuiPluginStatus,
+  type TuiTheme,
+} from "@opencode-ai/plugin/tui"
+import path from "path"
+import { fileURLToPath } from "url"
+
+import { Config } from "@/config/config"
+import { TuiConfig } from "@/config/tui"
+import { Log } from "@/util/log"
+import { errorData, errorMessage } from "@/util/error"
+import { isRecord } from "@/util/record"
+import { Instance } from "@/project/instance"
+import {
+  checkPluginCompatibility,
+  getDefaultPlugin,
+  isDeprecatedPlugin,
+  pluginSource,
+  readPluginId,
+  resolvePluginEntrypoint,
+  resolvePluginId,
+  resolvePluginTarget,
+  type PluginSource,
+} from "@/plugin/shared"
+import { PluginMeta } from "@/plugin/meta"
+import { installPlugin as installModulePlugin, patchPluginConfig, readPluginManifest } from "@/plugin/install"
+import { addTheme, hasTheme } from "../context/theme"
+import { Global } from "@/global"
+import { Filesystem } from "@/util/filesystem"
+import { Process } from "@/util/process"
+import { Flag } from "@/flag/flag"
+import { Installation } from "@/installation"
+import { INTERNAL_TUI_PLUGINS, type InternalTuiPlugin } from "./internal"
+import { setupSlots, Slot as View } from "./slots"
+import type { HostPluginApi, HostSlots } from "./slots"
+
+type PluginLoad = {
+  item?: Config.PluginSpec
+  spec: string
+  target: string
+  retry: boolean
+  source: PluginSource | "internal"
+  id: string
+  module: TuiPluginModule
+  install_theme: TuiTheme["install"]
+}
+
+type Api = HostPluginApi
+
+type PluginScope = {
+  lifecycle: TuiPluginApi["lifecycle"]
+  track: (fn: (() => void) | undefined) => () => void
+  dispose: () => Promise<void>
+}
+
+type PluginEntry = {
+  id: string
+  load: PluginLoad
+  meta: TuiPluginMeta
+  plugin: TuiPlugin
+  options: Config.PluginOptions | undefined
+  enabled: boolean
+  scope?: PluginScope
+}
+
+type RuntimeState = {
+  directory: string
+  api: Api
+  slots: HostSlots
+  plugins: PluginEntry[]
+  plugins_by_id: Map<string, PluginEntry>
+  pending: Map<
+    string,
+    {
+      item: Config.PluginSpec
+      meta: TuiConfig.PluginMeta
+    }
+  >
+}
+
+const log = Log.create({ service: "tui.plugin" })
+const DISPOSE_TIMEOUT_MS = 5000
+const KV_KEY = "plugin_enabled"
+
+function fail(message: string, data: Record<string, unknown>) {
+  if (!("error" in data)) {
+    log.error(message, data)
+    console.error(`[tui.plugin] ${message}`, data)
+    return
+  }
+
+  const text = `${message}: ${errorMessage(data.error)}`
+  const next = { ...data, error: errorData(data.error) }
+  log.error(text, next)
+  console.error(`[tui.plugin] ${text}`, next)
+}
+
+type CleanupResult = { type: "ok" } | { type: "error"; error: unknown } | { type: "timeout" }
+
+function runCleanup(fn: () => unknown, ms: number): Promise<CleanupResult> {
+  return new Promise((resolve) => {
+    const timer = setTimeout(() => {
+      resolve({ type: "timeout" })
+    }, ms)
+
+    Promise.resolve()
+      .then(fn)
+      .then(
+        () => {
+          resolve({ type: "ok" })
+        },
+        (error) => {
+          resolve({ type: "error", error })
+        },
+      )
+      .finally(() => {
+        clearTimeout(timer)
+      })
+  })
+}
+
+function isTheme(value: unknown) {
+  if (!isRecord(value)) return false
+  if (!("theme" in value)) return false
+  if (!isRecord(value.theme)) return false
+  return true
+}
+
+function resolveRoot(root: string) {
+  if (root.startsWith("file://")) {
+    const file = fileURLToPath(root)
+    if (root.endsWith("/")) return file
+    return path.dirname(file)
+  }
+  if (path.isAbsolute(root)) return root
+  return path.resolve(process.cwd(), root)
+}
+
+function createThemeInstaller(meta: TuiConfig.PluginMeta, root: string, spec: string): TuiTheme["install"] {
+  return async (file) => {
+    const raw = file.startsWith("file://") ? fileURLToPath(file) : file
+    const src = path.isAbsolute(raw) ? raw : path.resolve(root, raw)
+    const theme = path.basename(src, path.extname(src))
+    if (hasTheme(theme)) return
+
+    const text = await Filesystem.readText(src).catch((error) => {
+      log.warn("failed to read tui plugin theme", { path: spec, theme: src, error })
+      return
+    })
+    if (text === undefined) return
+
+    const fail = Symbol()
+    const data = await Promise.resolve(text)
+      .then((x) => JSON.parse(x))
+      .catch((error) => {
+        log.warn("failed to parse tui plugin theme", { path: spec, theme: src, error })
+        return fail
+      })
+    if (data === fail) return
+
+    if (!isTheme(data)) {
+      log.warn("invalid tui plugin theme", { path: spec, theme: src })
+      return
+    }
+
+    const source_dir = path.dirname(meta.source)
+    const local_dir =
+      path.basename(source_dir) === ".opencode"
+        ? path.join(source_dir, "themes")
+        : path.join(source_dir, ".opencode", "themes")
+    const dest_dir = meta.scope === "local" ? local_dir : path.join(Global.Path.config, "themes")
+    const dest = path.join(dest_dir, `${theme}.json`)
+    if (!(await Filesystem.exists(dest))) {
+      await Filesystem.write(dest, text).catch((error) => {
+        log.warn("failed to persist tui plugin theme", { path: spec, theme: src, dest, error })
+      })
+    }
+
+    addTheme(theme, data)
+  }
+}
+
+async function loadExternalPlugin(
+  item: Config.PluginSpec,
+  meta: TuiConfig.PluginMeta | undefined,
+  retry = false,
+): Promise<PluginLoad | undefined> {
+  const spec = Config.pluginSpecifier(item)
+  if (isDeprecatedPlugin(spec)) return
+  log.info("loading tui plugin", { path: spec, retry })
+  const resolved = await resolvePluginTarget(spec).catch((error) => {
+    fail("failed to resolve tui plugin", { path: spec, retry, error })
+    return
+  })
+  if (!resolved) return
+
+  const source = pluginSource(spec)
+  if (source === "npm") {
+    const ok = await checkPluginCompatibility(resolved, Installation.VERSION)
+      .then(() => true)
+      .catch((error) => {
+        fail("tui plugin incompatible", { path: spec, retry, error })
+        return false
+      })
+    if (!ok) return
+  }
+
+  const target = resolved
+  if (!meta) {
+    fail("missing tui plugin metadata", {
+      path: spec,
+      retry,
+    })
+    return
+  }
+
+  const root = resolveRoot(source === "file" ? spec : target)
+  const install_theme = createThemeInstaller(meta, root, spec)
+  const entry = await resolvePluginEntrypoint(spec, target, "tui").catch((error) => {
+    fail("failed to resolve tui plugin entry", { path: spec, target, retry, error })
+    return
+  })
+  if (!entry) return
+
+  const mod = await import(entry)
+    .then((raw) => {
+      const mod = getDefaultPlugin(raw) as TuiPluginModule | undefined
+      if (!mod?.tui) throw new TypeError(`Plugin ${spec} must default export an object with tui()`)
+      return mod
+    })
+    .catch((error) => {
+      fail("failed to load tui plugin", { path: spec, target: entry, retry, error })
+      return
+    })
+  if (!mod) return
+
+  const id = await resolvePluginId(source, spec, target, readPluginId(mod.id, spec)).catch((error) => {
+    fail("failed to load tui plugin", { path: spec, target, retry, error })
+    return
+  })
+  if (!id) return
+
+  return {
+    item,
+    spec,
+    target,
+    retry,
+    source,
+    id,
+    module: mod,
+    install_theme,
+  }
+}
+
+function createMeta(
+  source: PluginLoad["source"],
+  spec: string,
+  target: string,
+  meta: { state: PluginMeta.State; entry: PluginMeta.Entry } | undefined,
+  id?: string,
+): TuiPluginMeta {
+  if (meta) {
+    return {
+      state: meta.state,
+      ...meta.entry,
+    }
+  }
+
+  const now = Date.now()
+  return {
+    state: source === "internal" ? "same" : "first",
+    id: id ?? spec,
+    source,
+    spec,
+    target,
+    first_time: now,
+    last_time: now,
+    time_changed: now,
+    load_count: 1,
+    fingerprint: target,
+  }
+}
+
+function loadInternalPlugin(item: InternalTuiPlugin): PluginLoad {
+  const spec = item.id
+  const target = spec
+
+  return {
+    spec,
+    target,
+    retry: false,
+    source: "internal",
+    id: item.id,
+    module: item,
+    install_theme: createThemeInstaller(
+      {
+        scope: "global",
+        source: target,
+      },
+      process.cwd(),
+      spec,
+    ),
+  }
+}
+
+function createPluginScope(load: PluginLoad, id: string) {
+  const ctrl = new AbortController()
+  let list: { key: symbol; fn: TuiDispose }[] = []
+  let done = false
+
+  const onDispose = (fn: TuiDispose) => {
+    if (done) return () => {}
+    const key = Symbol()
+    list.push({ key, fn })
+    let drop = false
+    return () => {
+      if (drop) return
+      drop = true
+      list = list.filter((x) => x.key !== key)
+    }
+  }
+
+  const track = (fn: (() => void) | undefined) => {
+    if (!fn) return () => {}
+    const off = onDispose(fn)
+    let drop = false
+    return () => {
+      if (drop) return
+      drop = true
+      off()
+      fn()
+    }
+  }
+
+  const lifecycle: TuiPluginApi["lifecycle"] = {
+    signal: ctrl.signal,
+    onDispose,
+  }
+
+  const dispose = async () => {
+    if (done) return
+    done = true
+    ctrl.abort()
+    const queue = [...list].reverse()
+    list = []
+    const until = Date.now() + DISPOSE_TIMEOUT_MS
+    for (const item of queue) {
+      const left = until - Date.now()
+      if (left <= 0) {
+        fail("timed out cleaning up tui plugin", {
+          path: load.spec,
+          id,
+          timeout: DISPOSE_TIMEOUT_MS,
+        })
+        break
+      }
+
+      const out = await runCleanup(item.fn, left)
+      if (out.type === "ok") continue
+      if (out.type === "timeout") {
+        fail("timed out cleaning up tui plugin", {
+          path: load.spec,
+          id,
+          timeout: DISPOSE_TIMEOUT_MS,
+        })
+        break
+      }
+
+      if (out.type === "error") {
+        fail("failed to clean up tui plugin", {
+          path: load.spec,
+          id,
+          error: out.error,
+        })
+      }
+    }
+  }
+
+  return {
+    lifecycle,
+    track,
+    dispose,
+  }
+}
+
+function readPluginEnabledMap(value: unknown) {
+  if (!isRecord(value)) return {}
+  return Object.fromEntries(
+    Object.entries(value).filter((item): item is [string, boolean] => typeof item[1] === "boolean"),
+  )
+}
+
+function pluginEnabledState(state: RuntimeState, config: TuiConfig.Info) {
+  return {
+    ...readPluginEnabledMap(config.plugin_enabled),
+    ...readPluginEnabledMap(state.api.kv.get(KV_KEY, {})),
+  }
+}
+
+function writePluginEnabledState(api: Api, id: string, enabled: boolean) {
+  api.kv.set(KV_KEY, {
+    ...readPluginEnabledMap(api.kv.get(KV_KEY, {})),
+    [id]: enabled,
+  })
+}
+
+function listPluginStatus(state: RuntimeState): TuiPluginStatus[] {
+  return state.plugins.map((plugin) => ({
+    id: plugin.id,
+    source: plugin.meta.source,
+    spec: plugin.meta.spec,
+    target: plugin.meta.target,
+    enabled: plugin.enabled,
+    active: plugin.scope !== undefined,
+  }))
+}
+
+async function deactivatePluginEntry(state: RuntimeState, plugin: PluginEntry, persist: boolean) {
+  plugin.enabled = false
+  if (persist) writePluginEnabledState(state.api, plugin.id, false)
+  if (!plugin.scope) return true
+  const scope = plugin.scope
+  plugin.scope = undefined
+  await scope.dispose()
+  return true
+}
+
+async function activatePluginEntry(state: RuntimeState, plugin: PluginEntry, persist: boolean) {
+  plugin.enabled = true
+  if (persist) writePluginEnabledState(state.api, plugin.id, true)
+  if (plugin.scope) return true
+
+  const scope = createPluginScope(plugin.load, plugin.id)
+  const api = pluginApi(state, plugin.load, scope, plugin.id)
+  const ok = await Promise.resolve()
+    .then(async () => {
+      await plugin.plugin(api, plugin.options, plugin.meta)
+      return true
+    })
+    .catch((error) => {
+      fail("failed to initialize tui plugin", {
+        path: plugin.load.spec,
+        id: plugin.id,
+        error,
+      })
+      return false
+    })
+
+  if (!ok) {
+    await scope.dispose()
+    return false
+  }
+
+  if (!plugin.enabled) {
+    await scope.dispose()
+    return true
+  }
+
+  plugin.scope = scope
+  return true
+}
+
+async function activatePluginById(state: RuntimeState | undefined, id: string, persist: boolean) {
+  if (!state) return false
+  const plugin = state.plugins_by_id.get(id)
+  if (!plugin) return false
+  return activatePluginEntry(state, plugin, persist)
+}
+
+async function deactivatePluginById(state: RuntimeState | undefined, id: string, persist: boolean) {
+  if (!state) return false
+  const plugin = state.plugins_by_id.get(id)
+  if (!plugin) return false
+  return deactivatePluginEntry(state, plugin, persist)
+}
+
+function pluginApi(runtime: RuntimeState, load: PluginLoad, scope: PluginScope, base: string): TuiPluginApi {
+  const api = runtime.api
+  const host = runtime.slots
+  const command: TuiPluginApi["command"] = {
+    register(cb) {
+      return scope.track(api.command.register(cb))
+    },
+    trigger(value) {
+      api.command.trigger(value)
+    },
+  }
+
+  const route: TuiPluginApi["route"] = {
+    register(list) {
+      return scope.track(api.route.register(list))
+    },
+    navigate(name, params) {
+      api.route.navigate(name, params)
+    },
+    get current() {
+      return api.route.current
+    },
+  }
+
+  const theme: TuiPluginApi["theme"] = Object.assign(Object.create(api.theme), {
+    install: load.install_theme,
+  })
+
+  const event: TuiPluginApi["event"] = {
+    on(type, handler) {
+      return scope.track(api.event.on(type, handler))
+    },
+  }
+
+  let count = 0
+
+  const slots: TuiPluginApi["slots"] = {
+    register(plugin) {
+      const id = count ? `${base}:${count}` : base
+      count += 1
+      scope.track(host.register({ ...plugin, id }))
+      return id
+    },
+  }
+
+  return {
+    app: api.app,
+    command,
+    route,
+    ui: api.ui,
+    keybind: api.keybind,
+    tuiConfig: api.tuiConfig,
+    kv: api.kv,
+    state: api.state,
+    theme,
+    get client() {
+      return api.client
+    },
+    scopedClient: api.scopedClient,
+    workspace: api.workspace,
+    event,
+    renderer: api.renderer,
+    slots,
+    plugins: {
+      list() {
+        return listPluginStatus(runtime)
+      },
+      activate(id) {
+        return activatePluginById(runtime, id, true)
+      },
+      deactivate(id) {
+        return deactivatePluginById(runtime, id, true)
+      },
+      add(spec) {
+        return addPluginBySpec(runtime, spec)
+      },
+      install(spec, options) {
+        return installPluginBySpec(runtime, spec, options?.global)
+      },
+    },
+    lifecycle: scope.lifecycle,
+  }
+}
+
+function collectPluginEntries(load: PluginLoad, meta: TuiPluginMeta) {
+  // TUI stays default-only so plugin ids, lifecycle, and errors remain stable.
+  const plugin = load.module.tui
+  if (!plugin) return []
+  const options = load.item ? Config.pluginOptions(load.item) : undefined
+  return [
+    {
+      id: load.id,
+      load,
+      meta,
+      plugin,
+      options,
+      enabled: true,
+    },
+  ]
+}
+
+function addPluginEntry(state: RuntimeState, plugin: PluginEntry) {
+  if (state.plugins_by_id.has(plugin.id)) {
+    fail("duplicate tui plugin id", {
+      id: plugin.id,
+      path: plugin.load.spec,
+    })
+    return false
+  }
+
+  state.plugins_by_id.set(plugin.id, plugin)
+  state.plugins.push(plugin)
+  return true
+}
+
+function applyInitialPluginEnabledState(state: RuntimeState, config: TuiConfig.Info) {
+  const map = pluginEnabledState(state, config)
+  for (const plugin of state.plugins) {
+    const enabled = map[plugin.id]
+    if (enabled === undefined) continue
+    plugin.enabled = enabled
+  }
+}
+
+async function resolveExternalPlugins(
+  list: Config.PluginSpec[],
+  wait: () => Promise<void>,
+  meta: (item: Config.PluginSpec) => TuiConfig.PluginMeta | undefined,
+) {
+  const loaded = await Promise.all(list.map((item) => loadExternalPlugin(item, meta(item))))
+  const ready: PluginLoad[] = []
+  let deps: Promise<void> | undefined
+
+  for (let i = 0; i < list.length; i++) {
+    let entry = loaded[i]
+    if (!entry) {
+      const item = list[i]
+      if (!item) continue
+      const spec = Config.pluginSpecifier(item)
+      if (pluginSource(spec) !== "file") continue
+      deps ??= wait().catch((error) => {
+        log.warn("failed waiting for tui plugin dependencies", { error })
+      })
+      await deps
+      entry = await loadExternalPlugin(item, meta(item), true)
+    }
+    if (!entry) continue
+    ready.push(entry)
+  }
+
+  return ready
+}
+
+async function addExternalPluginEntries(state: RuntimeState, ready: PluginLoad[]) {
+  if (!ready.length) return { plugins: [] as PluginEntry[], ok: true }
+
+  const meta = await PluginMeta.touchMany(
+    ready.map((item) => ({
+      spec: item.spec,
+      target: item.target,
+      id: item.id,
+    })),
+  ).catch((error) => {
+    log.warn("failed to track tui plugins", { error })
+    return undefined
+  })
+
+  const plugins: PluginEntry[] = []
+  let ok = true
+  for (let i = 0; i < ready.length; i++) {
+    const entry = ready[i]
+    if (!entry) continue
+    const hit = meta?.[i]
+    if (hit && hit.state !== "same") {
+      log.info("tui plugin metadata updated", {
+        path: entry.spec,
+        retry: entry.retry,
+        state: hit.state,
+        source: hit.entry.source,
+        version: hit.entry.version,
+        modified: hit.entry.modified,
+      })
+    }
+
+    const row = createMeta(entry.source, entry.spec, entry.target, hit, entry.id)
+    for (const plugin of collectPluginEntries(entry, row)) {
+      if (!addPluginEntry(state, plugin)) {
+        ok = false
+        continue
+      }
+      plugins.push(plugin)
+    }
+  }
+
+  return { plugins, ok }
+}
+
+function defaultPluginMeta(state: RuntimeState): TuiConfig.PluginMeta {
+  return {
+    scope: "local",
+    source: state.api.state.path.config || path.join(state.directory, ".opencode", "tui.json"),
+  }
+}
+
+function installCause(err: unknown) {
+  if (!err || typeof err !== "object") return
+  if (!("cause" in err)) return
+  return (err as { cause?: unknown }).cause
+}
+
+function installDetail(err: unknown) {
+  const hit = installCause(err) ?? err
+  if (!(hit instanceof Process.RunFailedError)) {
+    return {
+      message: errorMessage(hit),
+      missing: false,
+    }
+  }
+
+  const lines = hit.stderr
+    .toString()
+    .split(/\r?\n/)
+    .map((line) => line.trim())
+    .filter(Boolean)
+  const errs = lines.filter((line) => line.startsWith("error:")).map((line) => line.replace(/^error:\s*/, ""))
+  return {
+    message: errs[0] ?? lines.at(-1) ?? errorMessage(hit),
+    missing: lines.some((line) => line.includes("No version matching")),
+  }
+}
+
+async function addPluginBySpec(state: RuntimeState | undefined, raw: string) {
+  if (!state) return false
+  const spec = raw.trim()
+  if (!spec) return false
+
+  const pending = state.pending.get(spec)
+  const item = pending?.item ?? spec
+  const nextSpec = Config.pluginSpecifier(item)
+  if (state.plugins.some((plugin) => plugin.load.spec === nextSpec)) {
+    state.pending.delete(spec)
+    return true
+  }
+
+  const meta = pending?.meta ?? defaultPluginMeta(state)
+
+  const ready = await Instance.provide({
+    directory: state.directory,
+    fn: () =>
+      resolveExternalPlugins(
+        [item],
+        () => TuiConfig.waitForDependencies(),
+        () => meta,
+      ),
+  }).catch((error) => {
+    fail("failed to add tui plugin", { path: nextSpec, error })
+    return [] as PluginLoad[]
+  })
+  if (!ready.length) {
+    fail("failed to add tui plugin", { path: nextSpec })
+    return false
+  }
+
+  const first = ready[0]
+  if (!first) {
+    fail("failed to add tui plugin", { path: nextSpec })
+    return false
+  }
+  if (state.plugins_by_id.has(first.id)) {
+    state.pending.delete(spec)
+    return true
+  }
+
+  const out = await addExternalPluginEntries(state, [first])
+  let ok = out.ok && out.plugins.length > 0
+  for (const plugin of out.plugins) {
+    const active = await activatePluginEntry(state, plugin, false)
+    if (!active) ok = false
+  }
+
+  if (ok) state.pending.delete(spec)
+  if (!ok) {
+    fail("failed to add tui plugin", { path: nextSpec })
+  }
+  return ok
+}
+
+async function installPluginBySpec(
+  state: RuntimeState | undefined,
+  raw: string,
+  global = false,
+): Promise<TuiPluginInstallResult> {
+  if (!state) {
+    return {
+      ok: false,
+      message: "Plugin runtime is not ready.",
+    }
+  }
+
+  const spec = raw.trim()
+  if (!spec) {
+    return {
+      ok: false,
+      message: "Plugin package name is required",
+    }
+  }
+
+  const dir = state.api.state.path
+  if (!dir.directory) {
+    return {
+      ok: false,
+      message: "Paths are still syncing. Try again in a moment.",
+    }
+  }
+
+  const install = await installModulePlugin(spec)
+  if (!install.ok) {
+    const out = installDetail(install.error)
+    return {
+      ok: false,
+      message: out.message,
+      missing: out.missing,
+    }
+  }
+
+  const manifest = await readPluginManifest(install.target)
+  if (!manifest.ok) {
+    if (manifest.code === "manifest_no_targets") {
+      return {
+        ok: false,
+        message: `"${spec}" does not declare supported targets in package.json`,
+      }
+    }
+
+    return {
+      ok: false,
+      message: `Installed "${spec}" but failed to read ${manifest.file}`,
+    }
+  }
+
+  const patch = await patchPluginConfig({
+    spec,
+    targets: manifest.targets,
+    global,
+    vcs: dir.worktree && dir.worktree !== "/" ? "git" : undefined,
+    worktree: dir.worktree,
+    directory: dir.directory,
+  })
+  if (!patch.ok) {
+    if (patch.code === "invalid_json") {
+      return {
+        ok: false,
+        message: `Invalid JSON in ${patch.file} (${patch.parse} at line ${patch.line}, column ${patch.col})`,
+      }
+    }
+
+    return {
+      ok: false,
+      message: errorMessage(patch.error),
+    }
+  }
+
+  const tui = manifest.targets.find((item) => item.kind === "tui")
+  if (tui) {
+    const file = patch.items.find((item) => item.kind === "tui")?.file
+    state.pending.set(spec, {
+      item: tui.opts ? [spec, tui.opts] : spec,
+      meta: {
+        scope: global ? "global" : "local",
+        source: (file ?? dir.config) || path.join(patch.dir, "tui.json"),
+      },
+    })
+  }
+
+  return {
+    ok: true,
+    dir: patch.dir,
+    tui: Boolean(tui),
+  }
+}
+
+export namespace TuiPluginRuntime {
+  let dir = ""
+  let loaded: Promise<void> | undefined
+  let runtime: RuntimeState | undefined
+  export const Slot = View
+
+  export async function init(api: HostPluginApi) {
+    const cwd = process.cwd()
+    if (loaded) {
+      if (dir !== cwd) {
+        throw new Error(`TuiPluginRuntime.init() called with a different working directory. expected=${dir} got=${cwd}`)
+      }
+      return loaded
+    }
+
+    dir = cwd
+    loaded = load(api)
+    return loaded
+  }
+
+  export function list() {
+    if (!runtime) return []
+    return listPluginStatus(runtime)
+  }
+
+  export async function activatePlugin(id: string) {
+    return activatePluginById(runtime, id, true)
+  }
+
+  export async function deactivatePlugin(id: string) {
+    return deactivatePluginById(runtime, id, true)
+  }
+
+  export async function addPlugin(spec: string) {
+    return addPluginBySpec(runtime, spec)
+  }
+
+  export async function installPlugin(spec: string, options?: { global?: boolean }) {
+    return installPluginBySpec(runtime, spec, options?.global)
+  }
+
+  export async function dispose() {
+    const task = loaded
+    loaded = undefined
+    dir = ""
+    if (task) await task
+    const state = runtime
+    runtime = undefined
+    if (!state) return
+    const queue = [...state.plugins].reverse()
+    for (const plugin of queue) {
+      await deactivatePluginEntry(state, plugin, false)
+    }
+  }
+
+  async function load(api: Api) {
+    const cwd = process.cwd()
+    const slots = setupSlots(api)
+    const next: RuntimeState = {
+      directory: cwd,
+      api,
+      slots,
+      plugins: [],
+      plugins_by_id: new Map(),
+      pending: new Map(),
+    }
+    runtime = next
+
+    await Instance.provide({
+      directory: cwd,
+      fn: async () => {
+        const config = await TuiConfig.get()
+        const plugins = Flag.OPENCODE_PURE ? [] : (config.plugin ?? [])
+        if (Flag.OPENCODE_PURE && config.plugin?.length) {
+          log.info("skipping external tui plugins in pure mode", { count: config.plugin.length })
+        }
+
+        for (const item of INTERNAL_TUI_PLUGINS) {
+          log.info("loading internal tui plugin", { id: item.id })
+          const entry = loadInternalPlugin(item)
+          const meta = createMeta(entry.source, entry.spec, entry.target, undefined, entry.id)
+          for (const plugin of collectPluginEntries(entry, meta)) {
+            addPluginEntry(next, plugin)
+          }
+        }
+
+        const ready = await resolveExternalPlugins(
+          plugins,
+          () => TuiConfig.waitForDependencies(),
+          (item) => config.plugin_meta?.[Config.pluginSpecifier(item)],
+        )
+        await addExternalPluginEntries(next, ready)
+
+        applyInitialPluginEnabledState(next, config)
+        for (const plugin of next.plugins) {
+          if (!plugin.enabled) continue
+          // Keep plugin execution sequential for deterministic side effects:
+          // command registration order affects keybind/command precedence,
+          // route registration is last-wins when ids collide,
+          // and hook chains rely on stable plugin ordering.
+          await activatePluginEntry(next, plugin, false)
+        }
+      },
+    }).catch((error) => {
+      fail("failed to load tui plugins", { directory: cwd, error })
+    })
+  }
+}

packages/opencode/src/cli/cmd/tui/plugin/slots.tsx

@@ -0,0 +1,61 @@
+import { type SlotMode, type TuiPluginApi, type TuiSlotContext, type TuiSlotMap } from "@opencode-ai/plugin/tui"
+import { createSlot, createSolidSlotRegistry, type JSX, type SolidPlugin } from "@opentui/solid"
+import { isRecord } from "@/util/record"
+
+type SlotProps<K extends keyof TuiSlotMap> = {
+  name: K
+  mode?: SlotMode
+  children?: JSX.Element
+} & TuiSlotMap[K]
+
+type Slot = <K extends keyof TuiSlotMap>(props: SlotProps<K>) => JSX.Element | null
+export type HostSlotPlugin = SolidPlugin<TuiSlotMap, TuiSlotContext>
+
+export type HostPluginApi = TuiPluginApi
+export type HostSlots = {
+  register: (plugin: HostSlotPlugin) => () => void
+}
+
+function empty<K extends keyof TuiSlotMap>(_props: SlotProps<K>) {
+  return null
+}
+
+let view: Slot = empty
+
+export const Slot: Slot = (props) => view(props)
+
+function isHostSlotPlugin(value: unknown): value is HostSlotPlugin {
+  if (!isRecord(value)) return false
+  if (typeof value.id !== "string") return false
+  if (!isRecord(value.slots)) return false
+  return true
+}
+
+export function setupSlots(api: HostPluginApi): HostSlots {
+  const reg = createSolidSlotRegistry<TuiSlotMap, TuiSlotContext>(
+    api.renderer,
+    {
+      theme: api.theme,
+    },
+    {
+      onPluginError(event) {
+        console.error("[tui.slot] plugin error", {
+          plugin: event.pluginId,
+          slot: event.slot,
+          phase: event.phase,
+          source: event.source,
+          message: event.error.message,
+        })
+      },
+    },
+  )
+
+  const slot = createSlot<TuiSlotMap, TuiSlotContext>(reg)
+  view = (props) => slot(props)
+  return {
+    register(plugin) {
+      if (!isHostSlotPlugin(plugin)) return () => {}
+      return reg.register(plugin)
+    },
+  }
+}

packages/opencode/src/cli/cmd/tui/routes/home.tsx

@@ -1,9 +1,7 @@
 import { Prompt, type PromptRef } from "@tui/component/prompt"
 import { createEffect, createMemo, Match, on, onMount, Show, Switch } from "solid-js"
 import { useTheme } from "@tui/context/theme"
-import { useKeybind } from "@tui/context/keybind"
 import { Logo } from "../component/logo"
-import { Tips } from "../component/tips"
 import { Locale } from "@/util/locale"
 import { useSync } from "../context/sync"
 import { Toast } from "../ui/toast"
@@ -12,20 +10,17 @@ import { useDirectory } from "../context/directory"
 import { useRouteData } from "@tui/context/route"
 import { usePromptRef } from "../context/prompt"
 import { Installation } from "@/installation"
-import { useKV } from "../context/kv"
-import { useCommandDialog } from "../component/dialog-command"
 import { useLocal } from "../context/local"
+import { TuiPluginRuntime } from "../plugin"
 
 // TODO: what is the best way to do this?
 let once = false
 
 export function Home() {
   const sync = useSync()
-  const kv = useKV()
   const { theme } = useTheme()
   const route = useRouteData("home")
   const promptRef = usePromptRef()
-  const command = useCommandDialog()
   const mcp = createMemo(() => Object.keys(sync.data.mcp).length > 0)
   const mcpError = createMemo(() => {
     return Object.values(sync.data.mcp).some((x) => x.status === "failed")
@@ -35,30 +30,9 @@ export function Home() {
     return Object.values(sync.data.mcp).filter((x) => x.status === "connected").length
   })
 
-  const isFirstTimeUser = createMemo(() => sync.data.session.length === 0)
-  const tipsHidden = createMemo(() => kv.get("tips_hidden", false))
-  const showTips = createMemo(() => {
-    // Don't show tips for first-time users
-    if (isFirstTimeUser()) return false
-    return !tipsHidden()
-  })
-
-  command.register(() => [
-    {
-      title: tipsHidden() ? "Show tips" : "Hide tips",
-      value: "tips.toggle",
-      keybind: "tips_toggle",
-      category: "System",
-      onSelect: (dialog) => {
-        kv.set("tips_hidden", !tipsHidden())
-        dialog.clear()
-      },
-    },
-  ])
-
   const Hint = (
-    <Show when={connectedMcpCount() > 0}>
-      <box flexShrink={0} flexDirection="row" gap={1}>
+    <box flexShrink={0} flexDirection="row" gap={1}>
+      <Show when={connectedMcpCount() > 0}>
         <text fg={theme.text}>
           <Switch>
             <Match when={mcpError()}>
@@ -71,8 +45,8 @@ export function Home() {
             </Match>
           </Switch>
         </text>
-      </box>
-    </Show>
+      </Show>
+    </box>
   )
 
   let prompt: PromptRef
@@ -103,15 +77,15 @@ export function Home() {
   )
   const directory = useDirectory()
 
-  const keybind = useKeybind()
-
   return (
     <>
       <box flexGrow={1} alignItems="center" paddingLeft={2} paddingRight={2}>
         <box flexGrow={1} minHeight={0} />
         <box height={4} minHeight={0} flexShrink={1} />
         <box flexShrink={0}>
-          <Logo />
+          <TuiPluginRuntime.Slot name="home_logo" mode="replace">
+            <Logo />
+          </TuiPluginRuntime.Slot>
         </box>
         <box height={1} minHeight={0} flexShrink={1} />
         <box width="100%" maxWidth={75} zIndex={1000} paddingTop={1} flexShrink={0}>
@@ -124,11 +98,7 @@ export function Home() {
             workspaceID={route.workspaceID}
           />
         </box>
-        <box height={4} minHeight={0} width="100%" maxWidth={75} alignItems="center" paddingTop={3} flexShrink={1}>
-          <Show when={showTips()}>
-            <Tips />
-          </Show>
-        </box>
+        <TuiPluginRuntime.Slot name="home_bottom" />
         <box flexGrow={1} minHeight={0} />
         <Toast />
       </box>

packages/opencode/src/cli/cmd/tui/routes/session/index.tsx

@@ -70,7 +70,6 @@ import { Toast, useToast } from "../../ui/toast"
 import { useKV } from "../../context/kv.tsx"
 import { Editor } from "../../util/editor"
 import stripAnsi from "strip-ansi"
-import { Footer } from "./footer.tsx"
 import { usePromptRef } from "../../context/prompt"
 import { useExit } from "../../context/exit"
 import { Filesystem } from "@/util/filesystem"

packages/opencode/src/cli/cmd/tui/routes/session/sidebar.tsx

@@ -1,72 +1,13 @@
 import { useSync } from "@tui/context/sync"
-import { createMemo, For, Show, Switch, Match } from "solid-js"
-import { createStore } from "solid-js/store"
+import { createMemo, Show } from "solid-js"
 import { useTheme } from "../../context/theme"
-import { Locale } from "@/util/locale"
-import path from "path"
-import type { AssistantMessage } from "@opencode-ai/sdk/v2"
-import { Global } from "@/global"
 import { Installation } from "@/installation"
-import { useKeybind } from "../../context/keybind"
-import { useDirectory } from "../../context/directory"
-import { useKV } from "../../context/kv"
-import { TodoItem } from "../../component/todo-item"
+import { TuiPluginRuntime } from "../../plugin"
 
 export function Sidebar(props: { sessionID: string; overlay?: boolean }) {
   const sync = useSync()
   const { theme } = useTheme()
-  const session = createMemo(() => sync.session.get(props.sessionID)!)
-  const diff = createMemo(() => sync.data.session_diff[props.sessionID] ?? [])
-  const todo = createMemo(() => sync.data.todo[props.sessionID] ?? [])
-  const messages = createMemo(() => sync.data.message[props.sessionID] ?? [])
-
-  const [expanded, setExpanded] = createStore({
-    mcp: true,
-    diff: true,
-    todo: true,
-    lsp: true,
-  })
-
-  // Sort MCP servers alphabetically for consistent display order
-  const mcpEntries = createMemo(() => Object.entries(sync.data.mcp).sort(([a], [b]) => a.localeCompare(b)))
-
-  // Count connected and error MCP servers for collapsed header display
-  const connectedMcpCount = createMemo(() => mcpEntries().filter(([_, item]) => item.status === "connected").length)
-  const errorMcpCount = createMemo(
-    () =>
-      mcpEntries().filter(
-        ([_, item]) =>
-          item.status === "failed" || item.status === "needs_auth" || item.status === "needs_client_registration",
-      ).length,
-  )
-
-  const cost = createMemo(() => {
-    const total = messages().reduce((sum, x) => sum + (x.role === "assistant" ? x.cost : 0), 0)
-    return new Intl.NumberFormat("en-US", {
-      style: "currency",
-      currency: "USD",
-    }).format(total)
-  })
-
-  const context = createMemo(() => {
-    const last = messages().findLast((x) => x.role === "assistant" && x.tokens.output > 0) as AssistantMessage
-    if (!last) return
-    const total =
-      last.tokens.input + last.tokens.output + last.tokens.reasoning + last.tokens.cache.read + last.tokens.cache.write
-    const model = sync.data.provider.find((x) => x.id === last.providerID)?.models[last.modelID]
-    return {
-      tokens: total.toLocaleString(),
-      percentage: model?.limit.context ? Math.round((total / model.limit.context) * 100) : null,
-    }
-  })
-
-  const directory = useDirectory()
-  const kv = useKV()
-
-  const hasProviders = createMemo(() =>
-    sync.data.provider.some((x) => x.id !== "opencode" || Object.values(x.models).some((y) => y.cost?.input !== 0)),
-  )
-  const gettingStartedDismissed = createMemo(() => kv.get("dismissed_getting_started", false))
+  const session = createMemo(() => sync.session.get(props.sessionID))
 
   return (
     <Show when={session()}>
@@ -90,230 +31,36 @@ export function Sidebar(props: { sessionID: string; overlay?: boolean }) {
           }}
         >
           <box flexShrink={0} gap={1} paddingRight={1}>
-            <box paddingRight={1}>
-              <text fg={theme.text}>
-                <b>{session().title}</b>
-              </text>
-              <Show when={session().share?.url}>
-                <text fg={theme.textMuted}>{session().share!.url}</text>
-              </Show>
-            </box>
-            <box>
-              <text fg={theme.text}>
-                <b>Context</b>
-              </text>
-              <text fg={theme.textMuted}>{context()?.tokens ?? 0} tokens</text>
-              <text fg={theme.textMuted}>{context()?.percentage ?? 0}% used</text>
-              <text fg={theme.textMuted}>{cost()} spent</text>
-            </box>
-            <Show when={mcpEntries().length > 0}>
-              <box>
-                <box
-                  flexDirection="row"
-                  gap={1}
-                  onMouseDown={() => mcpEntries().length > 2 && setExpanded("mcp", !expanded.mcp)}
-                >
-                  <Show when={mcpEntries().length > 2}>
-                    <text fg={theme.text}>{expanded.mcp ? "▼" : "▶"}</text>
-                  </Show>
-                  <text fg={theme.text}>
-                    <b>MCP</b>
-                    <Show when={!expanded.mcp}>
-                      <span style={{ fg: theme.textMuted }}>
-                        {" "}
-                        ({connectedMcpCount()} active
-                        {errorMcpCount() > 0 ? `, ${errorMcpCount()} error${errorMcpCount() > 1 ? "s" : ""}` : ""})
-                      </span>
-                    </Show>
-                  </text>
-                </box>
-                <Show when={mcpEntries().length <= 2 || expanded.mcp}>
-                  <For each={mcpEntries()}>
-                    {([key, item]) => (
-                      <box flexDirection="row" gap={1}>
-                        <text
-                          flexShrink={0}
-                          style={{
-                            fg: (
-                              {
-                                connected: theme.success,
-                                failed: theme.error,
-                                disabled: theme.textMuted,
-                                needs_auth: theme.warning,
-                                needs_client_registration: theme.error,
-                              } as Record<string, typeof theme.success>
-                            )[item.status],
-                          }}
-                        >
-                          •
-                        </text>
-                        <text fg={theme.text} wrapMode="word">
-                          {key}{" "}
-                          <span style={{ fg: theme.textMuted }}>
-                            <Switch fallback={item.status}>
-                              <Match when={item.status === "connected"}>Connected</Match>
-                              <Match when={item.status === "failed" && item}>{(val) => <i>{val().error}</i>}</Match>
-                              <Match when={item.status === "disabled"}>Disabled</Match>
-                              <Match when={(item.status as string) === "needs_auth"}>Needs auth</Match>
-                              <Match when={(item.status as string) === "needs_client_registration"}>
-                                Needs client ID
-                              </Match>
-                            </Switch>
-                          </span>
-                        </text>
-                      </box>
-                    )}
-                  </For>
-                </Show>
-              </box>
-            </Show>
-            <box>
-              <box
-                flexDirection="row"
-                gap={1}
-                onMouseDown={() => sync.data.lsp.length > 2 && setExpanded("lsp", !expanded.lsp)}
-              >
-                <Show when={sync.data.lsp.length > 2}>
-                  <text fg={theme.text}>{expanded.lsp ? "▼" : "▶"}</text>
-                </Show>
+            <TuiPluginRuntime.Slot
+              name="sidebar_title"
+              mode="single_winner"
+              session_id={props.sessionID}
+              title={session()!.title}
+              share_url={session()!.share?.url}
+            >
+              <box paddingRight={1}>
                 <text fg={theme.text}>
-                  <b>LSP</b>
+                  <b>{session()!.title}</b>
                 </text>
-              </box>
-              <Show when={sync.data.lsp.length <= 2 || expanded.lsp}>
-                <Show when={sync.data.lsp.length === 0}>
-                  <text fg={theme.textMuted}>
-                    {sync.data.config.lsp === false
-                      ? "LSPs have been disabled in settings"
-                      : "LSPs will activate as files are read"}
-                  </text>
-                </Show>
-                <For each={sync.data.lsp}>
-                  {(item) => (
-                    <box flexDirection="row" gap={1}>
-                      <text
-                        flexShrink={0}
-                        style={{
-                          fg: {
-                            connected: theme.success,
-                            error: theme.error,
-                          }[item.status],
-                        }}
-                      >
-                        •
-                      </text>
-                      <text fg={theme.textMuted}>
-                        {item.id} {item.root}
-                      </text>
-                    </box>
-                  )}
-                </For>
-              </Show>
-            </box>
-            <Show when={todo().length > 0 && todo().some((t) => t.status !== "completed")}>
-              <box>
-                <box
-                  flexDirection="row"
-                  gap={1}
-                  onMouseDown={() => todo().length > 2 && setExpanded("todo", !expanded.todo)}
-                >
-                  <Show when={todo().length > 2}>
-                    <text fg={theme.text}>{expanded.todo ? "▼" : "▶"}</text>
-                  </Show>
-                  <text fg={theme.text}>
-                    <b>Todo</b>
-                  </text>
-                </box>
-                <Show when={todo().length <= 2 || expanded.todo}>
-                  <For each={todo()}>{(todo) => <TodoItem status={todo.status} content={todo.content} />}</For>
+                <Show when={session()!.share?.url}>
+                  <text fg={theme.textMuted}>{session()!.share!.url}</text>
                 </Show>
               </box>
-            </Show>
-            <Show when={diff().length > 0}>
-              <box>
-                <box
-                  flexDirection="row"
-                  gap={1}
-                  onMouseDown={() => diff().length > 2 && setExpanded("diff", !expanded.diff)}
-                >
-                  <Show when={diff().length > 2}>
-                    <text fg={theme.text}>{expanded.diff ? "▼" : "▶"}</text>
-                  </Show>
-                  <text fg={theme.text}>
-                    <b>Modified Files</b>
-                  </text>
-                </box>
-                <Show when={diff().length <= 2 || expanded.diff}>
-                  <For each={diff() || []}>
-                    {(item) => {
-                      return (
-                        <box flexDirection="row" gap={1} justifyContent="space-between">
-                          <text fg={theme.textMuted} wrapMode="none">
-                            {item.file}
-                          </text>
-                          <box flexDirection="row" gap={1} flexShrink={0}>
-                            <Show when={item.additions}>
-                              <text fg={theme.diffAdded}>+{item.additions}</text>
-                            </Show>
-                            <Show when={item.deletions}>
-                              <text fg={theme.diffRemoved}>-{item.deletions}</text>
-                            </Show>
-                          </box>
-                        </box>
-                      )
-                    }}
-                  </For>
-                </Show>
-              </box>
-            </Show>
+            </TuiPluginRuntime.Slot>
+            <TuiPluginRuntime.Slot name="sidebar_content" session_id={props.sessionID} />
           </box>
         </scrollbox>
 
         <box flexShrink={0} gap={1} paddingTop={1}>
-          <Show when={!hasProviders() && !gettingStartedDismissed()}>
-            <box
-              backgroundColor={theme.backgroundElement}
-              paddingTop={1}
-              paddingBottom={1}
-              paddingLeft={2}
-              paddingRight={2}
-              flexDirection="row"
-              gap={1}
-            >
-              <text flexShrink={0} fg={theme.text}>
-                ⬖
-              </text>
-              <box flexGrow={1} gap={1}>
-                <box flexDirection="row" justifyContent="space-between">
-                  <text fg={theme.text}>
-                    <b>Getting started</b>
-                  </text>
-                  <text fg={theme.textMuted} onMouseDown={() => kv.set("dismissed_getting_started", true)}>
-                    ✕
-                  </text>
-                </box>
-                <text fg={theme.textMuted}>OpenCode includes free models so you can start immediately.</text>
-                <text fg={theme.textMuted}>
-                  Connect from 75+ providers to use other models, including Claude, GPT, Gemini etc
-                </text>
-                <box flexDirection="row" gap={1} justifyContent="space-between">
-                  <text fg={theme.text}>Connect provider</text>
-                  <text fg={theme.textMuted}>/connect</text>
-                </box>
-              </box>
-            </box>
-          </Show>
-          <text>
-            <span style={{ fg: theme.textMuted }}>{directory().split("/").slice(0, -1).join("/")}/</span>
-            <span style={{ fg: theme.text }}>{directory().split("/").at(-1)}</span>
-          </text>
-          <text fg={theme.textMuted}>
-            <span style={{ fg: theme.success }}>•</span> <b>Open</b>
-            <span style={{ fg: theme.text }}>
-              <b>Code</b>
-            </span>{" "}
-            <span>{Installation.VERSION}</span>
-          </text>
+          <TuiPluginRuntime.Slot name="sidebar_footer" mode="single_winner" session_id={props.sessionID}>
+            <text fg={theme.textMuted}>
+              <span style={{ fg: theme.success }}>•</span> <b>Open</b>
+              <span style={{ fg: theme.text }}>
+                <b>Code</b>
+              </span>{" "}
+              <span>{Installation.VERSION}</span>
+            </text>
+          </TuiPluginRuntime.Slot>
         </box>
       </box>
     </Show>

packages/opencode/src/cli/cmd/tui/thread.ts

@@ -6,6 +6,7 @@ import path from "path"
 import { fileURLToPath } from "url"
 import { UI } from "@/cli/ui"
 import { Log } from "@/util/log"
+import { errorMessage } from "@/util/error"
 import { withTimeout } from "@/util/timeout"
 import { withNetworkOptions, resolveNetworkOptions } from "@/cli/network"
 import { Filesystem } from "@/util/filesystem"
@@ -145,7 +146,7 @@ export const TuiThreadCommand = cmd({
       const reload = () => {
         client.call("reload", undefined).catch((err) => {
           Log.Default.warn("worker reload failed", {
-            error: err instanceof Error ? err.message : String(err),
+            error: errorMessage(err),
           })
         })
       }
@@ -162,7 +163,7 @@ export const TuiThreadCommand = cmd({
         process.off("SIGUSR2", reload)
         await withTimeout(client.call("shutdown", undefined), 5000).catch((error) => {
           Log.Default.warn("worker shutdown failed", {
-            error: error instanceof Error ? error.message : String(error),
+            error: errorMessage(error),
           })
         })
         worker.terminate()

packages/opencode/src/cli/cmd/tui/ui/dialog.tsx

@@ -9,7 +9,7 @@ import { Selection } from "@tui/util/selection"
 
 export function Dialog(
   props: ParentProps<{
-    size?: "medium" | "large"
+    size?: "medium" | "large" | "xlarge"
     onClose: () => void
   }>,
 ) {
@@ -18,6 +18,11 @@ export function Dialog(
   const renderer = useRenderer()
 
   let dismiss = false
+  const width = () => {
+    if (props.size === "xlarge") return 116
+    if (props.size === "large") return 88
+    return 60
+  }
 
   return (
     <box
@@ -35,6 +40,7 @@ export function Dialog(
       height={dimensions().height}
       alignItems="center"
       position="absolute"
+      zIndex={3000}
       paddingTop={dimensions().height / 4}
       left={0}
       top={0}
@@ -45,7 +51,7 @@ export function Dialog(
           dismiss = false
           e.stopPropagation()
         }}
-        width={props.size === "large" ? 80 : 60}
+        width={width()}
         maxWidth={dimensions().width - 2}
         backgroundColor={theme.backgroundPanel}
         paddingTop={1}
@@ -62,7 +68,7 @@ function init() {
       element: JSX.Element
       onClose?: () => void
     }[],
-    size: "medium" as "medium" | "large",
+    size: "medium" as "medium" | "large" | "xlarge",
   })
 
   const renderer = useRenderer()
@@ -72,6 +78,9 @@ function init() {
     if (evt.defaultPrevented) return
     if ((evt.name === "escape" || (evt.ctrl && evt.name === "c")) && renderer.getSelection()?.getSelectedText()) return
     if (evt.name === "escape" || (evt.ctrl && evt.name === "c")) {
+      if (renderer.getSelection()) {
+        renderer.clearSelection()
+      }
       const current = store.stack.at(-1)!
       current.onClose?.()
       setStore("stack", store.stack.slice(0, -1))
@@ -132,7 +141,7 @@ function init() {
     get size() {
       return store.size
     },
-    setSize(size: "medium" | "large") {
+    setSize(size: "medium" | "large" | "xlarge") {
       setStore("size", size)
     },
   }
@@ -151,6 +160,7 @@ export function DialogProvider(props: ParentProps) {
       {props.children}
       <box
         position="absolute"
+        zIndex={3000}
         onMouseDown={(evt) => {
           if (!Flag.OPENCODE_EXPERIMENTAL_DISABLE_COPY_ON_SELECT) return
           if (evt.button !== MouseButton.RIGHT) return

packages/opencode/src/cli/error.ts

@@ -1,4 +1,5 @@
 import { ConfigMarkdown } from "@/config/markdown"
+import { errorFormat } from "@/util/error"
 import { Config } from "../config/config"
 import { MCP } from "../mcp"
 import { Provider } from "../provider/provider"
@@ -41,17 +42,5 @@ export function FormatError(input: unknown) {
 }
 
 export function FormatUnknownError(input: unknown): string {
-  if (input instanceof Error) {
-    return input.stack ?? `${input.name}: ${input.message}`
-  }
-
-  if (typeof input === "object" && input !== null) {
-    try {
-      return JSON.stringify(input, null, 2)
-    } catch {
-      return "Unexpected error (unserializable)"
-    }
-  }
-
-  return String(input)
+  return errorFormat(input)
 }

packages/opencode/src/config/config.ts

@@ -30,20 +30,27 @@ import { GlobalBus } from "@/bus/global"
 import { Event } from "../server/event"
 import { Glob } from "../util/glob"
 import { PackageRegistry } from "@/bun/registry"
-import { proxied } from "@/util/proxied"
+import { online, proxied } from "@/util/network"
 import { iife } from "@/util/iife"
 import { Account } from "@/account"
+import { isRecord } from "@/util/record"
 import { ConfigPaths } from "./paths"
 import { Filesystem } from "@/util/filesystem"
 import { Process } from "@/util/process"
-import { Lock } from "@/util/lock"
 import { AppFileSystem } from "@/filesystem"
 import { InstanceState } from "@/effect/instance-state"
 import { makeRuntime } from "@/effect/run-service"
 import { Duration, Effect, Layer, Option, ServiceMap } from "effect"
+import { Flock } from "@/util/flock"
+import { isPathPluginSpec, parsePluginSpecifier, resolvePathPluginTarget } from "@/plugin/shared"
 
 export namespace Config {
   const ModelId = z.string().meta({ $ref: "https://models.dev/model-schema.json#/$defs/Model" })
+  const PluginOptions = z.record(z.string(), z.unknown())
+  export const PluginSpec = z.union([z.string(), z.tuple([z.string(), PluginOptions])])
+
+  export type PluginOptions = z.infer<typeof PluginOptions>
+  export type PluginSpec = z.infer<typeof PluginSpec>
 
   const log = Log.create({ service: "config" })
 
@@ -78,34 +85,65 @@ export namespace Config {
     return merged
   }
 
-  export async function installDependencies(dir: string) {
+  export type InstallInput = {
+    signal?: AbortSignal
+    waitTick?: (input: { dir: string; attempt: number; delay: number; waited: number }) => void | Promise<void>
+  }
+
+  export async function installDependencies(dir: string, input?: InstallInput) {
+    if (!(await needsInstall(dir))) return
+
+    await using _ = await Flock.acquire(`config-install:${Filesystem.resolve(dir)}`, {
+      signal: input?.signal,
+      onWait: (tick) =>
+        input?.waitTick?.({
+          dir,
+          attempt: tick.attempt,
+          delay: tick.delay,
+          waited: tick.waited,
+        }),
+    })
+
+    input?.signal?.throwIfAborted()
+    if (!(await needsInstall(dir))) return
+
     const pkg = path.join(dir, "package.json")
-    const targetVersion = Installation.isLocal() ? "*" : Installation.VERSION
+    const target = Installation.isLocal() ? "*" : Installation.VERSION
 
     const json = await Filesystem.readJson<{ dependencies?: Record<string, string> }>(pkg).catch(() => ({
       dependencies: {},
     }))
     json.dependencies = {
       ...json.dependencies,
-      "@opencode-ai/plugin": targetVersion,
+      "@opencode-ai/plugin": target,
     }
     await Filesystem.writeJson(pkg, json)
 
     const gitignore = path.join(dir, ".gitignore")
-    const hasGitIgnore = await Filesystem.exists(gitignore)
-    if (!hasGitIgnore)
+    const ignore = await Filesystem.exists(gitignore)
+    if (!ignore) {
       await Filesystem.write(gitignore, ["node_modules", "package.json", "bun.lock", ".gitignore"].join("\n"))
+    }
+
+    // Bun can race cache writes on Windows when installs run in parallel across dirs.
+    // Serialize installs globally on win32, but keep parallel installs on other platforms.
+    await using __ =
+      process.platform === "win32"
+        ? await Flock.acquire("config-install:bun", {
+            signal: input?.signal,
+          })
+        : undefined
 
-    // Install any additional dependencies defined in the package.json
-    // This allows local plugins and custom tools to use external packages
-    using _ = await Lock.write("bun-install")
     await BunProc.run(
       [
         "install",
         // TODO: get rid of this case (see: https://github.com/oven-sh/bun/issues/19936)
         ...(proxied() || process.env.CI ? ["--no-cache"] : []),
       ],
-      { cwd: dir },
+      {
+        cwd: dir,
+        abort: input?.signal,
+      },
     ).catch((err) => {
       if (err instanceof Process.RunFailedError) {
         const detail = {
@@ -149,8 +187,8 @@ export namespace Config {
       return false
     }
 
-    const nodeModules = path.join(dir, "node_modules")
-    if (!existsSync(nodeModules)) return true
+    const mod = path.join(dir, "node_modules", "@opencode-ai", "plugin")
+    if (!existsSync(mod)) return true
 
     const pkg = path.join(dir, "package.json")
     const pkgExists = await Filesystem.exists(pkg)
@@ -163,8 +201,9 @@ export namespace Config {
 
     const targetVersion = Installation.isLocal() ? "latest" : Installation.VERSION
     if (targetVersion === "latest") {
-      const isOutdated = await PackageRegistry.isOutdated("@opencode-ai/plugin", depVersion, dir)
-      if (!isOutdated) return false
+      if (!online()) return false
+      const stale = await PackageRegistry.isOutdated("@opencode-ai/plugin", depVersion, dir)
+      if (!stale) return false
       log.info("Cached version is outdated, proceeding with install", {
         pkg: "@opencode-ai/plugin",
         cachedVersion: depVersion,
@@ -303,7 +342,7 @@ export namespace Config {
   }
 
   async function loadPlugin(dir: string) {
-    const plugins: string[] = []
+    const plugins: PluginSpec[] = []
 
     for (const item of await Glob.scan("{plugin,plugins}/*.{ts,js}", {
       cwd: dir,
@@ -316,25 +355,44 @@ export namespace Config {
     return plugins
   }
 
-  /**
-   * Extracts a canonical plugin name from a plugin specifier.
-   * - For file:// URLs: extracts filename without extension
-   * - For npm packages: extracts package name without version
-   *
-   * @example
-   * getPluginName("file:///path/to/plugin/foo.js") // "foo"
-   * getPluginName("oh-my-opencode@2.4.3") // "oh-my-opencode"
-   * getPluginName("@scope/pkg@1.0.0") // "@scope/pkg"
-   */
-  export function getPluginName(plugin: string): string {
-    if (plugin.startsWith("file://")) {
-      return path.parse(new URL(plugin).pathname).name
+  export function pluginSpecifier(plugin: PluginSpec): string {
+    return Array.isArray(plugin) ? plugin[0] : plugin
+  }
+
+  export function pluginOptions(plugin: PluginSpec): PluginOptions | undefined {
+    return Array.isArray(plugin) ? plugin[1] : undefined
+  }
+
+  export async function resolvePluginSpec(plugin: PluginSpec, configFilepath: string): Promise<PluginSpec> {
+    const spec = pluginSpecifier(plugin)
+    if (!isPathPluginSpec(spec)) return plugin
+    if (spec.startsWith("file://")) {
+      const resolved = await resolvePathPluginTarget(spec).catch(() => spec)
+      if (Array.isArray(plugin)) return [resolved, plugin[1]]
+      return resolved
     }
-    const lastAt = plugin.lastIndexOf("@")
-    if (lastAt > 0) {
-      return plugin.substring(0, lastAt)
+    if (path.isAbsolute(spec) || /^[A-Za-z]:[\\/]/.test(spec)) {
+      const base = pathToFileURL(spec).href
+      const resolved = await resolvePathPluginTarget(base).catch(() => base)
+      if (Array.isArray(plugin)) return [resolved, plugin[1]]
+      return resolved
+    }
+    try {
+      const base = import.meta.resolve!(spec, configFilepath)
+      const resolved = await resolvePathPluginTarget(base).catch(() => base)
+      if (Array.isArray(plugin)) return [resolved, plugin[1]]
+      return resolved
+    } catch {
+      try {
+        const require = createRequire(configFilepath)
+        const base = pathToFileURL(require.resolve(spec)).href
+        const resolved = await resolvePathPluginTarget(base).catch(() => base)
+        if (Array.isArray(plugin)) return [resolved, plugin[1]]
+        return resolved
+      } catch {
+        return plugin
+      }
     }
-    return plugin
   }
 
   /**
@@ -348,17 +406,13 @@ export namespace Config {
    * Since plugins are added in low-to-high priority order,
    * we reverse, deduplicate (keeping first occurrence), then restore order.
    */
-  export function deduplicatePlugins(plugins: string[]): string[] {
-    // seenNames: canonical plugin names for duplicate detection
-    // e.g., "oh-my-opencode", "@scope/pkg"
+  export function deduplicatePlugins(plugins: PluginSpec[]): PluginSpec[] {
     const seenNames = new Set<string>()
-
-    // uniqueSpecifiers: full plugin specifiers to return
-    // e.g., "oh-my-opencode@2.4.3", "file:///path/to/plugin.js"
-    const uniqueSpecifiers: string[] = []
+    const uniqueSpecifiers: PluginSpec[] = []
 
     for (const specifier of plugins.toReversed()) {
-      const name = getPluginName(specifier)
+      const spec = pluginSpecifier(specifier)
+      const name = spec.startsWith("file://") ? spec : parsePluginSpecifier(spec).pkg
       if (!seenNames.has(name)) {
         seenNames.add(name)
         uniqueSpecifiers.push(specifier)
@@ -757,6 +811,7 @@ export namespace Config {
       terminal_suspend: z.string().optional().default("ctrl+z").describe("Suspend terminal"),
       terminal_title_toggle: z.string().optional().default("none").describe("Toggle terminal title"),
       tips_toggle: z.string().optional().default("<leader>h").describe("Toggle tips on home screen"),
+      plugin_manager: z.string().optional().default("none").describe("Open plugin manager dialog"),
       display_thinking: z.string().optional().default("none").describe("Toggle thinking blocks visibility"),
     })
     .strict()
@@ -858,13 +913,13 @@ export namespace Config {
           ignore: z.array(z.string()).optional(),
         })
         .optional(),
-      plugin: z.string().array().optional(),
       snapshot: z
         .boolean()
         .optional()
         .describe(
           "Enable or disable snapshot tracking. When false, filesystem snapshots are not recorded and undoing or reverting will not undo/redo file changes. Defaults to true.",
         ),
+      plugin: PluginSpec.array().optional(),
       share: z
         .enum(["manual", "auto", "disabled"])
         .optional()
@@ -1070,10 +1125,6 @@ export namespace Config {
     return candidates[0]
   }
 
-  function isRecord(value: unknown): value is Record<string, unknown> {
-    return !!value && typeof value === "object" && !Array.isArray(value)
-  }
-
   function patchJsonc(input: string, patch: unknown, path: string[] = []): string {
     if (!isRecord(patch)) {
       const edits = modify(input, path, patch, {
@@ -1189,19 +1240,9 @@ export namespace Config {
             }
             const data = parsed.data
             if (data.plugin && isFile) {
-              for (let i = 0; i < data.plugin.length; i++) {
-                const plugin = data.plugin[i]
-                try {
-                  data.plugin[i] = import.meta.resolve!(plugin, options.path)
-                } catch (e) {
-                  try {
-                    const require = createRequire(options.path)
-                    const resolvedPath = require.resolve(plugin)
-                    data.plugin[i] = pathToFileURL(resolvedPath).href
-                  } catch {
-                    // Ignore, plugin might be a generic string identifier like "mcp-server"
-                  }
-                }
+              const list = data.plugin
+              for (let i = 0; i < list.length; i++) {
+                list[i] = yield* Effect.promise(() => resolvePluginSpec(list[i], options.path))
               }
             }
             return data
@@ -1326,12 +1367,14 @@ export namespace Config {
               }
             }
 
-            deps.push(
-              iife(async () => {
-                const shouldInstall = await needsInstall(dir)
-                if (shouldInstall) await installDependencies(dir)
-              }),
-            )
+            const dep = iife(async () => {
+              const stale = await needsInstall(dir)
+              if (stale) await installDependencies(dir)
+            })
+            void dep.catch((err) => {
+              log.warn("background dependency install failed", { dir, error: err })
+            })
+            deps.push(dep)
 
             result.command = mergeDeep(result.command ?? {}, yield* Effect.promise(() => loadCommand(dir)))
             result.agent = mergeDeep(result.agent, yield* Effect.promise(() => loadAgent(dir)))

packages/opencode/src/config/tui-schema.ts

@@ -29,6 +29,8 @@ export const TuiInfo = z
     $schema: z.string().optional(),
     theme: z.string().optional(),
     keybinds: KeybindOverride.optional(),
+    plugin: Config.PluginSpec.array().optional(),
+    plugin_enabled: z.record(z.string(), z.boolean()).optional(),
   })
   .extend(TuiOptions.shape)
   .strict()

packages/opencode/src/config/tui.ts

@@ -8,23 +8,101 @@ import { TuiInfo } from "./tui-schema"
 import { Instance } from "@/project/instance"
 import { Flag } from "@/flag/flag"
 import { Log } from "@/util/log"
+import { isRecord } from "@/util/record"
 import { Global } from "@/global"
+import { parsePluginSpecifier } from "@/plugin/shared"
 
 export namespace TuiConfig {
   const log = Log.create({ service: "tui.config" })
 
   export const Info = TuiInfo
 
-  export type Info = z.output<typeof Info>
+  export type PluginMeta = {
+    scope: "global" | "local"
+    source: string
+  }
+
+  type PluginEntry = {
+    item: Config.PluginSpec
+    meta: PluginMeta
+  }
+
+  type Acc = {
+    result: Info
+    entries: PluginEntry[]
+  }
+
+  export type Info = z.output<typeof Info> & {
+    plugin_meta?: Record<string, PluginMeta>
+  }
+
+  function pluginScope(file: string): PluginMeta["scope"] {
+    if (Instance.containsPath(file)) return "local"
+    return "global"
+  }
+
+  function dedupePlugins(list: PluginEntry[]) {
+    const seen = new Set<string>()
+    const result: PluginEntry[] = []
+    for (const item of list.toReversed()) {
+      const spec = Config.pluginSpecifier(item.item)
+      const name = spec.startsWith("file://") ? spec : parsePluginSpecifier(spec).pkg
+      if (seen.has(name)) continue
+      seen.add(name)
+      result.push(item)
+    }
+    return result.toReversed()
+  }
 
   function mergeInfo(target: Info, source: Info): Info {
-    return mergeDeep(target, source)
+    const merged = mergeDeep(target, source)
+    if (target.plugin && source.plugin) {
+      merged.plugin = [...target.plugin, ...source.plugin]
+    }
+    return merged
   }
 
   function customPath() {
     return Flag.OPENCODE_TUI_CONFIG
   }
 
+  function normalize(raw: Record<string, unknown>) {
+    const data = { ...raw }
+    if (!("tui" in data)) return data
+    if (!isRecord(data.tui)) {
+      delete data.tui
+      return data
+    }
+
+    const tui = data.tui
+    delete data.tui
+    return {
+      ...tui,
+      ...data,
+    }
+  }
+
+  function installDeps(dir: string): Promise<void> {
+    return Config.installDependencies(dir)
+  }
+
+  async function mergeFile(acc: Acc, file: string) {
+    const data = await loadFile(file)
+    acc.result = mergeInfo(acc.result, data)
+    if (!data.plugin?.length) return
+
+    const scope = pluginScope(file)
+    for (const item of data.plugin) {
+      acc.entries.push({
+        item,
+        meta: {
+          scope,
+          source: file,
+        },
+      })
+    }
+  }
+
   const state = Instance.state(async () => {
     let projectFiles = Flag.OPENCODE_DISABLE_PROJECT_CONFIG
       ? []
@@ -38,38 +116,55 @@ export namespace TuiConfig {
       ? []
       : await ConfigPaths.projectFiles("tui", Instance.directory, Instance.worktree)
 
-    let result: Info = {}
+    const acc: Acc = {
+      result: {},
+      entries: [],
+    }
 
     for (const file of ConfigPaths.fileInDirectory(Global.Path.config, "tui")) {
-      result = mergeInfo(result, await loadFile(file))
+      await mergeFile(acc, file)
     }
 
     if (custom) {
-      result = mergeInfo(result, await loadFile(custom))
+      await mergeFile(acc, custom)
       log.debug("loaded custom tui config", { path: custom })
     }
 
     for (const file of projectFiles) {
-      result = mergeInfo(result, await loadFile(file))
+      await mergeFile(acc, file)
     }
 
     for (const dir of unique(directories)) {
       if (!dir.endsWith(".opencode") && dir !== Flag.OPENCODE_CONFIG_DIR) continue
       for (const file of ConfigPaths.fileInDirectory(dir, "tui")) {
-        result = mergeInfo(result, await loadFile(file))
+        await mergeFile(acc, file)
       }
     }
 
     if (existsSync(managed)) {
       for (const file of ConfigPaths.fileInDirectory(managed, "tui")) {
-        result = mergeInfo(result, await loadFile(file))
+        await mergeFile(acc, file)
       }
     }
 
-    result.keybinds = Config.Keybinds.parse(result.keybinds ?? {})
+    const merged = dedupePlugins(acc.entries)
+    acc.result.keybinds = Config.Keybinds.parse(acc.result.keybinds ?? {})
+    acc.result.plugin = merged.map((item) => item.item)
+    acc.result.plugin_meta = merged.length
+      ? Object.fromEntries(merged.map((item) => [Config.pluginSpecifier(item.item), item.meta]))
+      : undefined
+
+    const deps: Promise<void>[] = []
+    if (acc.result.plugin?.length) {
+      for (const dir of unique(directories)) {
+        if (!dir.endsWith(".opencode") && dir !== Flag.OPENCODE_CONFIG_DIR) continue
+        deps.push(installDeps(dir))
+      }
+    }
 
     return {
-      config: result,
+      config: acc.result,
+      deps,
     }
   })
 
@@ -77,6 +172,11 @@ export namespace TuiConfig {
     return state().then((x) => x.config)
   }
 
+  export async function waitForDependencies() {
+    const deps = await state().then((x) => x.deps)
+    await Promise.all(deps)
+  }
+
   async function loadFile(filepath: string): Promise<Info> {
     const text = await ConfigPaths.readFile(filepath)
     if (!text) return {}
@@ -87,25 +187,12 @@ export namespace TuiConfig {
   }
 
   async function load(text: string, configFilepath: string): Promise<Info> {
-    const data = await ConfigPaths.parseText(text, configFilepath, "empty")
-    if (!data || typeof data !== "object" || Array.isArray(data)) return {}
+    const raw = await ConfigPaths.parseText(text, configFilepath, "empty")
+    if (!isRecord(raw)) return {}
 
     // Flatten a nested "tui" key so users who wrote `{ "tui": { ... } }` inside tui.json
     // (mirroring the old opencode.json shape) still get their settings applied.
-    const normalized = (() => {
-      const copy = { ...(data as Record<string, unknown>) }
-      if (!("tui" in copy)) return copy
-      if (!copy.tui || typeof copy.tui !== "object" || Array.isArray(copy.tui)) {
-        delete copy.tui
-        return copy
-      }
-      const tui = copy.tui as Record<string, unknown>
-      delete copy.tui
-      return {
-        ...tui,
-        ...copy,
-      }
-    })()
+    const normalized = normalize(raw)
 
     const parsed = Info.safeParse(normalized)
     if (!parsed.success) {
@@ -113,6 +200,13 @@ export namespace TuiConfig {
       return {}
     }
 
-    return parsed.data
+    const data = parsed.data
+    if (data.plugin) {
+      for (let i = 0; i < data.plugin.length; i++) {
+        data.plugin[i] = await Config.resolvePluginSpec(data.plugin[i], configFilepath)
+      }
+    }
+
+    return data
   }
 }

packages/opencode/src/flag/flag.ts

@@ -14,13 +14,16 @@ export namespace Flag {
   export const OPENCODE_AUTO_SHARE = truthy("OPENCODE_AUTO_SHARE")
   export const OPENCODE_GIT_BASH_PATH = process.env["OPENCODE_GIT_BASH_PATH"]
   export const OPENCODE_CONFIG = process.env["OPENCODE_CONFIG"]
+  export declare const OPENCODE_PURE: boolean
   export declare const OPENCODE_TUI_CONFIG: string | undefined
   export declare const OPENCODE_CONFIG_DIR: string | undefined
+  export declare const OPENCODE_PLUGIN_META_FILE: string | undefined
   export const OPENCODE_CONFIG_CONTENT = process.env["OPENCODE_CONFIG_CONTENT"]
   export const OPENCODE_DISABLE_AUTOUPDATE = truthy("OPENCODE_DISABLE_AUTOUPDATE")
   export const OPENCODE_ALWAYS_NOTIFY_UPDATE = truthy("OPENCODE_ALWAYS_NOTIFY_UPDATE")
   export const OPENCODE_DISABLE_PRUNE = truthy("OPENCODE_DISABLE_PRUNE")
   export const OPENCODE_DISABLE_TERMINAL_TITLE = truthy("OPENCODE_DISABLE_TERMINAL_TITLE")
+  export const OPENCODE_SHOW_TTFD = truthy("OPENCODE_SHOW_TTFD")
   export const OPENCODE_PERMISSION = process.env["OPENCODE_PERMISSION"]
   export const OPENCODE_DISABLE_DEFAULT_PLUGINS = truthy("OPENCODE_DISABLE_DEFAULT_PLUGINS")
   export const OPENCODE_DISABLE_LSP_DOWNLOAD = truthy("OPENCODE_DISABLE_LSP_DOWNLOAD")
@@ -117,6 +120,28 @@ Object.defineProperty(Flag, "OPENCODE_CONFIG_DIR", {
   configurable: false,
 })
 
+// Dynamic getter for OPENCODE_PURE
+// This must be evaluated at access time, not module load time,
+// because the CLI can set this flag at runtime
+Object.defineProperty(Flag, "OPENCODE_PURE", {
+  get() {
+    return truthy("OPENCODE_PURE")
+  },
+  enumerable: true,
+  configurable: false,
+})
+
+// Dynamic getter for OPENCODE_PLUGIN_META_FILE
+// This must be evaluated at access time, not module load time,
+// because tests and external tooling may set this env var at runtime
+Object.defineProperty(Flag, "OPENCODE_PLUGIN_META_FILE", {
+  get() {
+    return process.env["OPENCODE_PLUGIN_META_FILE"]
+  },
+  enumerable: true,
+  configurable: false,
+})
+
 // Dynamic getter for OPENCODE_CLIENT
 // This must be evaluated at access time, not module load time,
 // because some commands override the client at runtime

packages/opencode/src/index.ts

@@ -33,16 +33,18 @@ import path from "path"
 import { Global } from "./global"
 import { JsonMigration } from "./storage/json-migration"
 import { Database } from "./storage/db"
+import { errorMessage } from "./util/error"
+import { PluginCommand } from "./cli/cmd/plug"
 
 process.on("unhandledRejection", (e) => {
   Log.Default.error("rejection", {
-    e: e instanceof Error ? e.message : e,
+    e: errorMessage(e),
   })
 })
 
 process.on("uncaughtException", (e) => {
   Log.Default.error("exception", {
-    e: e instanceof Error ? e.message : e,
+    e: errorMessage(e),
   })
 })
 
@@ -63,7 +65,15 @@ const cli = yargs(hideBin(process.argv))
     type: "string",
     choices: ["DEBUG", "INFO", "WARN", "ERROR"],
   })
+  .option("pure", {
+    describe: "run without external plugins",
+    type: "boolean",
+  })
   .middleware(async (opts) => {
+    if (opts.pure) {
+      process.env.OPENCODE_PURE = "1"
+    }
+
     await Log.init({
       print: process.argv.includes("--print-logs"),
       dev: Installation.isLocal(),
@@ -143,6 +153,7 @@ const cli = yargs(hideBin(process.argv))
   .command(GithubCommand)
   .command(PrCommand)
   .command(SessionCommand)
+  .command(PluginCommand)
   .command(DbCommand)
   .fail((msg, err) => {
     if (
@@ -194,7 +205,7 @@ try {
   if (formatted) UI.error(formatted)
   if (formatted === undefined) {
     UI.error("Unexpected error, check log file at " + Log.file() + " for more details" + EOL)
-    process.stderr.write((e instanceof Error ? e.message : String(e)) + EOL)
+    process.stderr.write(errorMessage(e) + EOL)
   }
   process.exitCode = 1
 } finally {

packages/opencode/src/plugin/index.ts

@@ -1,9 +1,8 @@
-import type { Hooks, PluginInput, Plugin as PluginInstance } from "@opencode-ai/plugin"
+import type { Hooks, PluginInput, Plugin as PluginInstance, PluginModule } from "@opencode-ai/plugin"
 import { Config } from "../config/config"
 import { Bus } from "../bus"
 import { Log } from "../util/log"
 import { createOpencodeClient } from "@opencode-ai/sdk"
-import { BunProc } from "../bun"
 import { Flag } from "../flag/flag"
 import { CodexAuthPlugin } from "./codex"
 import { Session } from "../session"
@@ -14,6 +13,17 @@ import { PoeAuthPlugin } from "opencode-poe-auth"
 import { Effect, Layer, ServiceMap, Stream } from "effect"
 import { InstanceState } from "@/effect/instance-state"
 import { makeRuntime } from "@/effect/run-service"
+import { errorMessage } from "@/util/error"
+import { Installation } from "@/installation"
+import {
+  checkPluginCompatibility,
+  getDefaultPlugin,
+  isDeprecatedPlugin,
+  parsePluginSpecifier,
+  pluginSource,
+  resolvePluginEntrypoint,
+  resolvePluginTarget,
+} from "./shared"
 
 export namespace Plugin {
   const log = Log.create({ service: "plugin" })
@@ -22,6 +32,12 @@ export namespace Plugin {
     hooks: Hooks[]
   }
 
+  type Loaded = {
+    item: Config.PluginSpec
+    spec: string
+    mod: Record<string, unknown>
+  }
+
   // Hook names that follow the (input, output) => Promise<void> trigger pattern
   type TriggerName = {
     [K in keyof Hooks]-?: NonNullable<Hooks[K]> extends (input: any, output: any) => Promise<void> ? K : never
@@ -46,8 +62,115 @@ export namespace Plugin {
   // Built-in plugins that are directly imported (not installed from npm)
   const INTERNAL_PLUGINS: PluginInstance[] = [CodexAuthPlugin, CopilotAuthPlugin, GitlabAuthPlugin, PoeAuthPlugin]
 
-  // Old npm package names for plugins that are now built-in — skip if users still have them in config
-  const DEPRECATED_PLUGIN_PACKAGES = ["opencode-openai-codex-auth", "opencode-copilot-auth"]
+  function isServerPlugin(value: unknown): value is PluginInstance {
+    return typeof value === "function"
+  }
+
+  function getServerPlugin(value: unknown) {
+    if (isServerPlugin(value)) return value
+    if (!value || typeof value !== "object" || !("server" in value)) return
+    if (!isServerPlugin(value.server)) return
+    return value.server
+  }
+
+  function getLegacyPlugins(mod: Record<string, unknown>) {
+    const seen = new Set<unknown>()
+    const result: PluginInstance[] = []
+
+    for (const entry of Object.values(mod)) {
+      if (seen.has(entry)) continue
+      seen.add(entry)
+      const plugin = getServerPlugin(entry)
+      if (!plugin) throw new TypeError("Plugin export is not a function")
+      result.push(plugin)
+    }
+
+    return result
+  }
+
+  async function resolvePlugin(spec: string) {
+    const parsed = parsePluginSpecifier(spec)
+    const target = await resolvePluginTarget(spec, parsed).catch((err) => {
+      const cause = err instanceof Error ? err.cause : err
+      const detail = errorMessage(cause ?? err)
+      log.error("failed to install plugin", { pkg: parsed.pkg, version: parsed.version, error: detail })
+      Bus.publish(Session.Event.Error, {
+        error: new NamedError.Unknown({
+          message: `Failed to install plugin ${parsed.pkg}@${parsed.version}: ${detail}`,
+        }).toObject(),
+      })
+      return ""
+    })
+    if (!target) return
+    return target
+  }
+
+  async function prepPlugin(item: Config.PluginSpec): Promise<Loaded | undefined> {
+    const spec = Config.pluginSpecifier(item)
+    if (isDeprecatedPlugin(spec)) return
+    log.info("loading plugin", { path: spec })
+    const resolved = await resolvePlugin(spec)
+    if (!resolved) return
+
+    if (pluginSource(spec) === "npm") {
+      const incompatible = await checkPluginCompatibility(resolved, Installation.VERSION)
+        .then(() => false)
+        .catch((err) => {
+          const message = errorMessage(err)
+          log.warn("plugin incompatible", { path: spec, error: message })
+          Bus.publish(Session.Event.Error, {
+            error: new NamedError.Unknown({
+              message: `Plugin ${spec} skipped: ${message}`,
+            }).toObject(),
+          })
+          return true
+        })
+      if (incompatible) return
+    }
+
+    const target = resolved
+    const entry = await resolvePluginEntrypoint(spec, target, "server").catch((err) => {
+      const message = errorMessage(err)
+      log.error("failed to resolve plugin server entry", { path: spec, target, error: message })
+      Bus.publish(Session.Event.Error, {
+        error: new NamedError.Unknown({
+          message: `Failed to load plugin ${spec}: ${message}`,
+        }).toObject(),
+      })
+      return
+    })
+    if (!entry) return
+
+    const mod = await import(entry).catch((err) => {
+      const message = errorMessage(err)
+      log.error("failed to load plugin", { path: spec, target: entry, error: message })
+      Bus.publish(Session.Event.Error, {
+        error: new NamedError.Unknown({
+          message: `Failed to load plugin ${spec}: ${message}`,
+        }).toObject(),
+      })
+      return
+    })
+    if (!mod) return
+
+    return {
+      item,
+      spec,
+      mod,
+    }
+  }
+
+  async function applyPlugin(load: Loaded, input: PluginInput, hooks: Hooks[]) {
+    const plugin = getDefaultPlugin(load.mod) as PluginModule | undefined
+    if (plugin?.server) {
+      hooks.push(await plugin.server(input, Config.pluginOptions(load.item)))
+      return
+    }
+
+    for (const server of getLegacyPlugins(load.mod)) {
+      hooks.push(await server(input, Config.pluginOptions(load.item)))
+    }
+  }
 
   export const layer = Layer.effect(
     Service,
@@ -91,51 +214,27 @@ export namespace Plugin {
               if (init) hooks.push(init)
             }
 
-            let plugins = cfg.plugin ?? []
+            const plugins = Flag.OPENCODE_PURE ? [] : (cfg.plugin ?? [])
+            if (Flag.OPENCODE_PURE && cfg.plugin?.length) {
+              log.info("skipping external plugins in pure mode", { count: cfg.plugin.length })
+            }
             if (plugins.length) await Config.waitForDependencies()
 
-            for (let plugin of plugins) {
-              if (DEPRECATED_PLUGIN_PACKAGES.some((pkg) => plugin.includes(pkg))) continue
-              log.info("loading plugin", { path: plugin })
-              if (!plugin.startsWith("file://")) {
-                const idx = plugin.lastIndexOf("@")
-                const pkg = idx > 0 ? plugin.substring(0, idx) : plugin
-                const version = idx > 0 ? plugin.substring(idx + 1) : "latest"
-                plugin = await BunProc.install(pkg, version).catch((err) => {
-                  const cause = err instanceof Error ? err.cause : err
-                  const detail = cause instanceof Error ? cause.message : String(cause ?? err)
-                  log.error("failed to install plugin", { pkg, version, error: detail })
-                  Bus.publish(Session.Event.Error, {
-                    error: new NamedError.Unknown({
-                      message: `Failed to install plugin ${pkg}@${version}: ${detail}`,
-                    }).toObject(),
-                  })
-                  return ""
-                })
-                if (!plugin) continue
-              }
+            const loaded = await Promise.all(plugins.map((item) => prepPlugin(item)))
+            for (const load of loaded) {
+              if (!load) continue
 
-              // Prevent duplicate initialization when plugins export the same function
-              // as both a named export and default export (e.g., `export const X` and `export default X`).
-              // Object.entries(mod) would return both entries pointing to the same function reference.
-              await import(plugin)
-                .then(async (mod) => {
-                  const seen = new Set<PluginInstance>()
-                  for (const [_name, fn] of Object.entries<PluginInstance>(mod)) {
-                    if (seen.has(fn)) continue
-                    seen.add(fn)
-                    hooks.push(await fn(input))
-                  }
-                })
-                .catch((err) => {
-                  const message = err instanceof Error ? err.message : String(err)
-                  log.error("failed to load plugin", { path: plugin, error: message })
-                  Bus.publish(Session.Event.Error, {
-                    error: new NamedError.Unknown({
-                      message: `Failed to load plugin ${plugin}: ${message}`,
-                    }).toObject(),
-                  })
+              // Keep plugin execution sequential so hook registration and execution
+              // order remains deterministic across plugin runs.
+              await applyPlugin(load, input, hooks).catch((err) => {
+                const message = errorMessage(err)
+                log.error("failed to load plugin", { path: load.spec, error: message })
+                Bus.publish(Session.Event.Error, {
+                  error: new NamedError.Unknown({
+                    message: `Failed to load plugin ${load.spec}: ${message}`,
+                  }).toObject(),
                 })
+              })
             }
 
             // Notify plugins of current config

packages/opencode/src/plugin/install.ts

@@ -0,0 +1,351 @@
+import path from "path"
+import {
+  type ParseError as JsoncParseError,
+  applyEdits,
+  modify,
+  parse as parseJsonc,
+  printParseErrorCode,
+} from "jsonc-parser"
+
+import { ConfigPaths } from "@/config/paths"
+import { Global } from "@/global"
+import { Filesystem } from "@/util/filesystem"
+import { Flock } from "@/util/flock"
+
+import { parsePluginSpecifier, readPluginPackage, resolvePluginTarget } from "./shared"
+
+type Mode = "noop" | "add" | "replace"
+type Kind = "server" | "tui"
+
+export type Target = {
+  kind: Kind
+  opts?: Record<string, unknown>
+}
+
+export type InstallDeps = {
+  resolve: (spec: string) => Promise<string>
+}
+
+export type PatchDeps = {
+  readText: (file: string) => Promise<string>
+  write: (file: string, text: string) => Promise<void>
+  exists: (file: string) => Promise<boolean>
+  files: (dir: string, name: "opencode" | "tui") => string[]
+}
+
+export type PatchInput = {
+  spec: string
+  targets: Target[]
+  force?: boolean
+  global?: boolean
+  vcs?: string
+  worktree: string
+  directory: string
+  config?: string
+}
+
+type Ok<T> = {
+  ok: true
+} & T
+
+type Err<C extends string, T> = {
+  ok: false
+  code: C
+} & T
+
+export type InstallResult = Ok<{ target: string }> | Err<"install_failed", { error: unknown }>
+
+export type ManifestResult =
+  | Ok<{ targets: Target[] }>
+  | Err<"manifest_read_failed", { file: string; error: unknown }>
+  | Err<"manifest_no_targets", { file: string }>
+
+export type PatchItem = {
+  kind: Kind
+  mode: Mode
+  file: string
+}
+
+type PatchErr =
+  | Err<"invalid_json", { kind: Kind; file: string; line: number; col: number; parse: string }>
+  | Err<"patch_failed", { kind: Kind; error: unknown }>
+
+type PatchOne = Ok<{ item: PatchItem }> | PatchErr
+
+export type PatchResult = Ok<{ dir: string; items: PatchItem[] }> | (PatchErr & { dir: string })
+
+const defaultInstallDeps: InstallDeps = {
+  resolve: (spec) => resolvePluginTarget(spec),
+}
+
+const defaultPatchDeps: PatchDeps = {
+  readText: (file) => Filesystem.readText(file),
+  write: async (file, text) => {
+    await Filesystem.write(file, text)
+  },
+  exists: (file) => Filesystem.exists(file),
+  files: (dir, name) => ConfigPaths.fileInDirectory(dir, name),
+}
+
+function pluginSpec(item: unknown) {
+  if (typeof item === "string") return item
+  if (!Array.isArray(item)) return
+  if (typeof item[0] !== "string") return
+  return item[0]
+}
+
+function parseTarget(item: unknown): Target | undefined {
+  if (item === "server" || item === "tui") return { kind: item }
+  if (!Array.isArray(item)) return
+  if (item[0] !== "server" && item[0] !== "tui") return
+  if (item.length < 2) return { kind: item[0] }
+  const opt = item[1]
+  if (!opt || typeof opt !== "object" || Array.isArray(opt)) return { kind: item[0] }
+  return {
+    kind: item[0],
+    opts: opt,
+  }
+}
+
+function parseTargets(raw: unknown) {
+  if (!Array.isArray(raw)) return []
+  const map = new Map<Kind, Target>()
+  for (const item of raw) {
+    const hit = parseTarget(item)
+    if (!hit) continue
+    map.set(hit.kind, hit)
+  }
+  return [...map.values()]
+}
+
+function patchPluginList(list: unknown[], spec: string, next: unknown, force = false): { mode: Mode; list: unknown[] } {
+  const pkg = parsePluginSpecifier(spec).pkg
+  const rows = list.map((item, i) => ({
+    item,
+    i,
+    spec: pluginSpec(item),
+  }))
+  const dup = rows.filter((item) => {
+    if (!item.spec) return false
+    if (item.spec === spec) return true
+    if (item.spec.startsWith("file://")) return false
+    return parsePluginSpecifier(item.spec).pkg === pkg
+  })
+
+  if (!dup.length) {
+    return {
+      mode: "add",
+      list: [...list, next],
+    }
+  }
+
+  if (!force) {
+    return {
+      mode: "noop",
+      list,
+    }
+  }
+
+  const keep = dup[0]
+  if (!keep) {
+    return {
+      mode: "noop",
+      list,
+    }
+  }
+
+  if (dup.length === 1 && keep.spec === spec) {
+    return {
+      mode: "noop",
+      list,
+    }
+  }
+
+  const idx = new Set(dup.map((item) => item.i))
+  return {
+    mode: "replace",
+    list: rows.flatMap((row) => {
+      if (!idx.has(row.i)) return [row.item]
+      if (row.i !== keep.i) return []
+      if (typeof row.item === "string") return [next]
+      if (Array.isArray(row.item) && typeof row.item[0] === "string") {
+        return [[spec, ...row.item.slice(1)]]
+      }
+      return [row.item]
+    }),
+  }
+}
+
+export async function installPlugin(spec: string, dep: InstallDeps = defaultInstallDeps): Promise<InstallResult> {
+  const target = await dep.resolve(spec).then(
+    (item) => ({
+      ok: true as const,
+      item,
+    }),
+    (error: unknown) => ({
+      ok: false as const,
+      error,
+    }),
+  )
+  if (!target.ok) {
+    return {
+      ok: false,
+      code: "install_failed",
+      error: target.error,
+    }
+  }
+  return {
+    ok: true,
+    target: target.item,
+  }
+}
+
+export async function readPluginManifest(target: string): Promise<ManifestResult> {
+  const pkg = await readPluginPackage(target).then(
+    (item) => ({
+      ok: true as const,
+      item,
+    }),
+    (error: unknown) => ({
+      ok: false as const,
+      error,
+    }),
+  )
+  if (!pkg.ok) {
+    return {
+      ok: false,
+      code: "manifest_read_failed",
+      file: target,
+      error: pkg.error,
+    }
+  }
+
+  const targets = parseTargets(pkg.item.json["oc-plugin"])
+  if (!targets.length) {
+    return {
+      ok: false,
+      code: "manifest_no_targets",
+      file: pkg.item.pkg,
+    }
+  }
+
+  return {
+    ok: true,
+    targets,
+  }
+}
+
+function patchDir(input: PatchInput) {
+  if (input.global) return input.config ?? Global.Path.config
+  const git = input.vcs === "git" && input.worktree !== "/"
+  const root = git ? input.worktree : input.directory
+  return path.join(root, ".opencode")
+}
+
+function patchName(kind: Kind): "opencode" | "tui" {
+  if (kind === "server") return "opencode"
+  return "tui"
+}
+
+async function patchOne(dir: string, target: Target, spec: string, force: boolean, dep: PatchDeps): Promise<PatchOne> {
+  const name = patchName(target.kind)
+  await using _ = await Flock.acquire(`plug-config:${Filesystem.resolve(path.join(dir, name))}`)
+
+  const files = dep.files(dir, name)
+  let cfg = files[0]
+  for (const file of files) {
+    if (!(await dep.exists(file))) continue
+    cfg = file
+    break
+  }
+
+  const src = await dep.readText(cfg).catch((err: NodeJS.ErrnoException) => {
+    if (err.code === "ENOENT") return "{}"
+    return err
+  })
+  if (src instanceof Error) {
+    return {
+      ok: false,
+      code: "patch_failed",
+      kind: target.kind,
+      error: src,
+    }
+  }
+  const text = src.trim() ? src : "{}"
+
+  const errs: JsoncParseError[] = []
+  const data = parseJsonc(text, errs, { allowTrailingComma: true })
+  if (errs.length) {
+    const err = errs[0]
+    const lines = text.substring(0, err.offset).split("\n")
+    return {
+      ok: false,
+      code: "invalid_json",
+      kind: target.kind,
+      file: cfg,
+      line: lines.length,
+      col: lines[lines.length - 1].length + 1,
+      parse: printParseErrorCode(err.error),
+    }
+  }
+
+  const list: unknown[] =
+    data && typeof data === "object" && !Array.isArray(data) && Array.isArray(data.plugin) ? data.plugin : []
+  const item = target.opts ? [spec, target.opts] : spec
+  const out = patchPluginList(list, spec, item, force)
+  if (out.mode === "noop") {
+    return {
+      ok: true,
+      item: {
+        kind: target.kind,
+        mode: out.mode,
+        file: cfg,
+      },
+    }
+  }
+
+  const edits = modify(text, ["plugin"], out.list, {
+    formattingOptions: {
+      tabSize: 2,
+      insertSpaces: true,
+    },
+  })
+  const write = await dep.write(cfg, applyEdits(text, edits)).catch((error: unknown) => error)
+  if (write instanceof Error) {
+    return {
+      ok: false,
+      code: "patch_failed",
+      kind: target.kind,
+      error: write,
+    }
+  }
+
+  return {
+    ok: true,
+    item: {
+      kind: target.kind,
+      mode: out.mode,
+      file: cfg,
+    },
+  }
+}
+
+export async function patchPluginConfig(input: PatchInput, dep: PatchDeps = defaultPatchDeps): Promise<PatchResult> {
+  const dir = patchDir(input)
+  const items: PatchItem[] = []
+  for (const target of input.targets) {
+    const hit = await patchOne(dir, target, input.spec, Boolean(input.force), dep)
+    if (!hit.ok) {
+      return {
+        ...hit,
+        dir,
+      }
+    }
+    items.push(hit.item)
+  }
+  return {
+    ok: true,
+    dir,
+    items,
+  }
+}

packages/opencode/src/plugin/meta.ts

@@ -0,0 +1,165 @@
+import path from "path"
+import { fileURLToPath } from "url"
+
+import { Flag } from "@/flag/flag"
+import { Global } from "@/global"
+import { Filesystem } from "@/util/filesystem"
+import { Flock } from "@/util/flock"
+
+import { parsePluginSpecifier, pluginSource } from "./shared"
+
+export namespace PluginMeta {
+  type Source = "file" | "npm"
+
+  export type Entry = {
+    id: string
+    source: Source
+    spec: string
+    target: string
+    requested?: string
+    version?: string
+    modified?: number
+    first_time: number
+    last_time: number
+    time_changed: number
+    load_count: number
+    fingerprint: string
+  }
+
+  export type State = "first" | "updated" | "same"
+
+  export type Touch = {
+    spec: string
+    target: string
+    id: string
+  }
+
+  type Store = Record<string, Entry>
+  type Core = Omit<Entry, "first_time" | "last_time" | "time_changed" | "load_count" | "fingerprint">
+  type Row = Touch & { core: Core }
+
+  function storePath() {
+    return Flag.OPENCODE_PLUGIN_META_FILE ?? path.join(Global.Path.state, "plugin-meta.json")
+  }
+
+  function lock(file: string) {
+    return `plugin-meta:${file}`
+  }
+
+  function fileTarget(spec: string, target: string) {
+    if (spec.startsWith("file://")) return fileURLToPath(spec)
+    if (target.startsWith("file://")) return fileURLToPath(target)
+    return
+  }
+
+  function modifiedAt(file: string) {
+    const stat = Filesystem.stat(file)
+    if (!stat) return
+    const value = stat.mtimeMs
+    return Math.floor(typeof value === "bigint" ? Number(value) : value)
+  }
+
+  function resolvedTarget(target: string) {
+    if (target.startsWith("file://")) return fileURLToPath(target)
+    return target
+  }
+
+  async function npmVersion(target: string) {
+    const resolved = resolvedTarget(target)
+    const stat = Filesystem.stat(resolved)
+    const dir = stat?.isDirectory() ? resolved : path.dirname(resolved)
+    return Filesystem.readJson<{ version?: string }>(path.join(dir, "package.json"))
+      .then((item) => item.version)
+      .catch(() => undefined)
+  }
+
+  async function entryCore(item: Touch): Promise<Core> {
+    const spec = item.spec
+    const target = item.target
+    const source = pluginSource(spec)
+    if (source === "file") {
+      const file = fileTarget(spec, target)
+      return {
+        id: item.id,
+        source,
+        spec,
+        target,
+        modified: file ? modifiedAt(file) : undefined,
+      }
+    }
+
+    return {
+      id: item.id,
+      source,
+      spec,
+      target,
+      requested: parsePluginSpecifier(spec).version,
+      version: await npmVersion(target),
+    }
+  }
+
+  function fingerprint(value: Core) {
+    if (value.source === "file") return [value.target, value.modified ?? ""].join("|")
+    return [value.target, value.requested ?? "", value.version ?? ""].join("|")
+  }
+
+  async function read(file: string): Promise<Store> {
+    return Filesystem.readJson<Store>(file).catch(() => ({}) as Store)
+  }
+
+  async function row(item: Touch): Promise<Row> {
+    return {
+      ...item,
+      core: await entryCore(item),
+    }
+  }
+
+  function next(prev: Entry | undefined, core: Core, now: number): { state: State; entry: Entry } {
+    const entry: Entry = {
+      ...core,
+      first_time: prev?.first_time ?? now,
+      last_time: now,
+      time_changed: prev?.time_changed ?? now,
+      load_count: (prev?.load_count ?? 0) + 1,
+      fingerprint: fingerprint(core),
+    }
+    const state: State = !prev ? "first" : prev.fingerprint === entry.fingerprint ? "same" : "updated"
+    if (state === "updated") entry.time_changed = now
+    return {
+      state,
+      entry,
+    }
+  }
+
+  export async function touchMany(items: Touch[]): Promise<Array<{ state: State; entry: Entry }>> {
+    if (!items.length) return []
+    const file = storePath()
+    const rows = await Promise.all(items.map((item) => row(item)))
+
+    return Flock.withLock(lock(file), async () => {
+      const store = await read(file)
+      const now = Date.now()
+      const out: Array<{ state: State; entry: Entry }> = []
+      for (const item of rows) {
+        const hit = next(store[item.id], item.core, now)
+        store[item.id] = hit.entry
+        out.push(hit)
+      }
+      await Filesystem.writeJson(file, store)
+      return out
+    })
+  }
+
+  export async function touch(spec: string, target: string, id: string): Promise<{ state: State; entry: Entry }> {
+    return touchMany([{ spec, target, id }]).then((item) => {
+      const hit = item[0]
+      if (hit) return hit
+      throw new Error("Failed to touch plugin metadata.")
+    })
+  }
+
+  export async function list(): Promise<Store> {
+    const file = storePath()
+    return Flock.withLock(lock(file), async () => read(file))
+  }
+}

packages/opencode/src/plugin/shared.ts

@@ -0,0 +1,149 @@
+import path from "path"
+import { fileURLToPath, pathToFileURL } from "url"
+import semver from "semver"
+import { BunProc } from "@/bun"
+import { Filesystem } from "@/util/filesystem"
+import { isRecord } from "@/util/record"
+
+// Old npm package names for plugins that are now built-in
+export const DEPRECATED_PLUGIN_PACKAGES = ["opencode-openai-codex-auth", "opencode-copilot-auth"]
+
+export function isDeprecatedPlugin(spec: string) {
+  return DEPRECATED_PLUGIN_PACKAGES.some((pkg) => spec.includes(pkg))
+}
+
+export function parsePluginSpecifier(spec: string) {
+  const lastAt = spec.lastIndexOf("@")
+  const pkg = lastAt > 0 ? spec.substring(0, lastAt) : spec
+  const version = lastAt > 0 ? spec.substring(lastAt + 1) : "latest"
+  return { pkg, version }
+}
+
+export type PluginSource = "file" | "npm"
+export type PluginKind = "server" | "tui"
+
+export function pluginSource(spec: string): PluginSource {
+  return spec.startsWith("file://") ? "file" : "npm"
+}
+
+function hasEntrypoint(json: Record<string, unknown>, kind: PluginKind) {
+  if (!isRecord(json.exports)) return false
+  return `./${kind}` in json.exports
+}
+
+function resolveExportPath(raw: string, dir: string) {
+  if (raw.startsWith("./") || raw.startsWith("../")) return path.resolve(dir, raw)
+  if (raw.startsWith("file://")) return fileURLToPath(raw)
+  return raw
+}
+
+function extractExportValue(value: unknown): string | undefined {
+  if (typeof value === "string") return value
+  if (!isRecord(value)) return undefined
+  for (const key of ["import", "default"]) {
+    const nested = value[key]
+    if (typeof nested === "string") return nested
+  }
+  return undefined
+}
+
+export async function resolvePluginEntrypoint(spec: string, target: string, kind: PluginKind) {
+  const pkg = await readPluginPackage(target).catch(() => undefined)
+  if (!pkg) return target
+  if (!hasEntrypoint(pkg.json, kind)) return target
+
+  const exports = pkg.json.exports
+  if (!isRecord(exports)) return target
+  const raw = extractExportValue(exports[`./${kind}`])
+  if (!raw) return target
+
+  const resolved = resolveExportPath(raw, pkg.dir)
+  const root = Filesystem.resolve(pkg.dir)
+  const next = Filesystem.resolve(resolved)
+  if (!Filesystem.contains(root, next)) {
+    throw new Error(`Plugin ${spec} resolved ${kind} entry outside plugin directory`)
+  }
+
+  return pathToFileURL(next).href
+}
+
+export function isPathPluginSpec(spec: string) {
+  return spec.startsWith("file://") || spec.startsWith(".") || path.isAbsolute(spec) || /^[A-Za-z]:[\\/]/.test(spec)
+}
+
+export async function resolvePathPluginTarget(spec: string) {
+  const raw = spec.startsWith("file://") ? fileURLToPath(spec) : spec
+  const file = path.isAbsolute(raw) || /^[A-Za-z]:[\\/]/.test(raw) ? raw : path.resolve(raw)
+  const stat = await Filesystem.stat(file)
+  if (!stat?.isDirectory()) {
+    if (spec.startsWith("file://")) return spec
+    return pathToFileURL(file).href
+  }
+
+  const pkg = await Filesystem.readJson<Record<string, unknown>>(path.join(file, "package.json")).catch(() => undefined)
+  if (!pkg) throw new Error(`Plugin directory ${file} is missing package.json`)
+  if (typeof pkg.main !== "string" || !pkg.main.trim()) {
+    throw new Error(`Plugin directory ${file} must define package.json main`)
+  }
+  return pathToFileURL(path.resolve(file, pkg.main)).href
+}
+
+export async function checkPluginCompatibility(target: string, opencodeVersion: string) {
+  if (!semver.valid(opencodeVersion) || semver.major(opencodeVersion) === 0) return
+  const pkg = await readPluginPackage(target).catch(() => undefined)
+  if (!pkg) return
+  const engines = pkg.json.engines
+  if (!isRecord(engines)) return
+  const range = engines.opencode
+  if (typeof range !== "string") return
+  if (!semver.satisfies(opencodeVersion, range)) {
+    throw new Error(`Plugin requires opencode ${range} but running ${opencodeVersion}`)
+  }
+}
+
+export async function resolvePluginTarget(spec: string, parsed = parsePluginSpecifier(spec)) {
+  if (isPathPluginSpec(spec)) return resolvePathPluginTarget(spec)
+  return BunProc.install(parsed.pkg, parsed.version)
+}
+
+export async function readPluginPackage(target: string) {
+  const file = target.startsWith("file://") ? fileURLToPath(target) : target
+  const stat = await Filesystem.stat(file)
+  const dir = stat?.isDirectory() ? file : path.dirname(file)
+  const pkg = path.join(dir, "package.json")
+  const json = await Filesystem.readJson<Record<string, unknown>>(pkg)
+  return { dir, pkg, json }
+}
+
+export function readPluginId(id: unknown, spec: string) {
+  if (id === undefined) return
+  if (typeof id !== "string") throw new TypeError(`Plugin ${spec} has invalid id type ${typeof id}`)
+  const value = id.trim()
+  if (!value) throw new TypeError(`Plugin ${spec} has an empty id`)
+  return value
+}
+
+export async function resolvePluginId(source: PluginSource, spec: string, target: string, id: string | undefined) {
+  if (source === "file") {
+    if (id) return id
+    throw new TypeError(`Path plugin ${spec} must export id`)
+  }
+  if (id) return id
+  const pkg = await readPluginPackage(target)
+  if (typeof pkg.json.name !== "string" || !pkg.json.name.trim()) {
+    throw new TypeError(`Plugin package ${pkg.pkg} is missing name`)
+  }
+  return pkg.json.name.trim()
+}
+
+export function getDefaultPlugin(mod: Record<string, unknown>) {
+  // A single default object keeps v1 detection explicit and avoids scanning exports.
+  const value = mod.default
+  if (!isRecord(value)) return
+  const server = "server" in value ? value.server : undefined
+  const tui = "tui" in value ? value.tui : undefined
+  if (server !== undefined && typeof server !== "function") return
+  if (tui !== undefined && typeof tui !== "function") return
+  if (server === undefined && tui === undefined) return
+  return value
+}

packages/opencode/src/provider/auth.ts

@@ -1,4 +1,4 @@
-import type { AuthOuathResult, Hooks } from "@opencode-ai/plugin"
+import type { AuthOAuthResult, Hooks } from "@opencode-ai/plugin"
 import { NamedError } from "@opencode-ai/util/error"
 import { Auth } from "@/auth"
 import { InstanceState } from "@/effect/instance-state"
@@ -106,7 +106,7 @@ export namespace ProviderAuth {
 
   interface State {
     hooks: Record<ProviderID, Hook>
-    pending: Map<ProviderID, AuthOuathResult>
+    pending: Map<ProviderID, AuthOAuthResult>
   }
 
   export class Service extends ServiceMap.Service<Service, Interface>()("@opencode/ProviderAuth") {}
@@ -127,7 +127,7 @@ export namespace ProviderAuth {
                     : Result.failVoid,
                 ),
               ),
-              pending: new Map<ProviderID, AuthOuathResult>(),
+              pending: new Map<ProviderID, AuthOAuthResult>(),
             }
           }),
         ),

packages/opencode/src/session/message-v2.ts

@@ -11,6 +11,7 @@ import { Database, NotFoundError, and, desc, eq, inArray, lt, or } from "@/stora
 import { MessageTable, PartTable, SessionTable } from "./session.sql"
 import { ProviderError } from "@/provider/error"
 import { iife } from "@/util/iife"
+import { errorMessage } from "@/util/error"
 import type { SystemError } from "bun"
 import type { Provider } from "@/provider/provider"
 import { ModelID, ProviderID } from "@/provider/schema"
@@ -990,7 +991,7 @@ export namespace MessageV2 {
           { cause: e },
         ).toObject()
       case e instanceof Error:
-        return new NamedError.Unknown({ message: e instanceof Error ? e.message : String(e) }, { cause: e }).toObject()
+        return new NamedError.Unknown({ message: errorMessage(e) }, { cause: e }).toObject()
       default:
         try {
           const parsed = ProviderError.parseStreamError(e)

packages/opencode/src/tool/batch.ts

@@ -1,6 +1,7 @@
 import z from "zod"
 import { Tool } from "./tool"
 import { ProviderID, ModelID } from "../provider/schema"
+import { errorMessage } from "../util/error"
 import DESCRIPTION from "./batch.txt"
 
 const DISALLOWED = new Set(["batch"])
@@ -118,7 +119,7 @@ export const BatchTool = Tool.define("batch", async () => {
             state: {
               status: "error",
               input: call.parameters,
-              error: error instanceof Error ? error.message : String(error),
+              error: errorMessage(error),
               time: {
                 start: callStartTime,
                 end: Date.now(),

packages/opencode/src/util/error.ts

@@ -0,0 +1,77 @@
+import { isRecord } from "./record"
+
+export function errorFormat(error: unknown): string {
+  if (error instanceof Error) {
+    return error.stack ?? `${error.name}: ${error.message}`
+  }
+
+  if (typeof error === "object" && error !== null) {
+    try {
+      return JSON.stringify(error, null, 2)
+    } catch {
+      return "Unexpected error (unserializable)"
+    }
+  }
+
+  return String(error)
+}
+
+export function errorMessage(error: unknown): string {
+  if (error instanceof Error) {
+    if (error.message) return error.message
+    if (error.name) return error.name
+  }
+
+  if (isRecord(error) && typeof error.message === "string" && error.message) {
+    return error.message
+  }
+
+  const text = String(error)
+  if (text && text !== "[object Object]") return text
+
+  const formatted = errorFormat(error)
+  if (formatted && formatted !== "{}") return formatted
+  return "unknown error"
+}
+
+export function errorData(error: unknown) {
+  if (error instanceof Error) {
+    return {
+      type: error.name,
+      message: errorMessage(error),
+      stack: error.stack,
+      cause: error.cause === undefined ? undefined : errorFormat(error.cause),
+      formatted: errorFormatted(error),
+    }
+  }
+
+  if (!isRecord(error)) {
+    return {
+      type: typeof error,
+      message: errorMessage(error),
+      formatted: errorFormatted(error),
+    }
+  }
+
+  const data = Object.getOwnPropertyNames(error).reduce<Record<string, unknown>>((acc, key) => {
+    const value = error[key]
+    if (value === undefined) return acc
+    if (typeof value === "string" || typeof value === "number" || typeof value === "boolean") {
+      acc[key] = value
+      return acc
+    }
+    acc[key] = value instanceof Error ? value.message : String(value)
+    return acc
+  }, {})
+
+  if (typeof data.message !== "string") data.message = errorMessage(error)
+  if (typeof data.type !== "string") data.type = error.constructor?.name
+  data.formatted = errorFormatted(error)
+  return data
+}
+
+function errorFormatted(error: unknown) {
+  const formatted = errorFormat(error)
+  if (formatted !== "{}") return formatted
+  return String(error)
+}

packages/opencode/src/util/flock.ts

@@ -0,0 +1,333 @@
+import path from "path"
+import os from "os"
+import { randomBytes, randomUUID } from "crypto"
+import { mkdir, readFile, rm, stat, utimes, writeFile } from "fs/promises"
+import { Global } from "@/global"
+import { Hash } from "@/util/hash"
+
+export namespace Flock {
+  const root = path.join(Global.Path.state, "locks")
+  // Defaults for callers that do not provide timing options.
+  const defaultOpts = {
+    staleMs: 60_000,
+    timeoutMs: 5 * 60_000,
+    baseDelayMs: 100,
+    maxDelayMs: 2_000,
+  }
+
+  export interface WaitEvent {
+    key: string
+    attempt: number
+    delay: number
+    waited: number
+  }
+
+  export type Wait = (input: WaitEvent) => void | Promise<void>
+
+  export interface Options {
+    dir?: string
+    signal?: AbortSignal
+    staleMs?: number
+    timeoutMs?: number
+    baseDelayMs?: number
+    maxDelayMs?: number
+    onWait?: Wait
+  }
+
+  type Opts = {
+    staleMs: number
+    timeoutMs: number
+    baseDelayMs: number
+    maxDelayMs: number
+  }
+
+  type Owned = {
+    acquired: true
+    startHeartbeat: (intervalMs?: number) => void
+    release: () => Promise<void>
+  }
+
+  export interface Lease {
+    release: () => Promise<void>
+    [Symbol.asyncDispose]: () => Promise<void>
+  }
+
+  function code(err: unknown) {
+    if (typeof err !== "object" || err === null || !("code" in err)) return
+    const value = err.code
+    if (typeof value !== "string") return
+    return value
+  }
+
+  function sleep(ms: number, signal?: AbortSignal) {
+    return new Promise<void>((resolve, reject) => {
+      if (signal?.aborted) {
+        reject(signal.reason ?? new Error("Aborted"))
+        return
+      }
+
+      let timer: NodeJS.Timeout | undefined
+
+      const done = () => {
+        signal?.removeEventListener("abort", abort)
+        resolve()
+      }
+
+      const abort = () => {
+        if (timer) {
+          clearTimeout(timer)
+        }
+        signal?.removeEventListener("abort", abort)
+        reject(signal?.reason ?? new Error("Aborted"))
+      }
+
+      signal?.addEventListener("abort", abort, { once: true })
+      timer = setTimeout(done, ms)
+    })
+  }
+
+  function jitter(ms: number) {
+    const j = Math.floor(ms * 0.3)
+    const d = Math.floor(Math.random() * (2 * j + 1)) - j
+    return Math.max(0, ms + d)
+  }
+
+  function mono() {
+    return performance.now()
+  }
+
+  function wall() {
+    return performance.timeOrigin + mono()
+  }
+
+  async function stats(file: string) {
+    try {
+      return await stat(file)
+    } catch (err) {
+      const errCode = code(err)
+      if (errCode === "ENOENT" || errCode === "ENOTDIR") return
+      throw err
+    }
+  }
+
+  async function stale(lockDir: string, heartbeatPath: string, metaPath: string, staleMs: number) {
+    // Stale detection allows automatic recovery after crashed owners.
+    const now = wall()
+    const heartbeat = await stats(heartbeatPath)
+    if (heartbeat) {
+      return now - heartbeat.mtimeMs > staleMs
+    }
+
+    const meta = await stats(metaPath)
+    if (meta) {
+      return now - meta.mtimeMs > staleMs
+    }
+
+    const dir = await stats(lockDir)
+    if (!dir) {
+      return false
+    }
+
+    return now - dir.mtimeMs > staleMs
+  }
+
+  async function tryAcquireLockDir(lockDir: string, opts: Opts): Promise<Owned | { acquired: false }> {
+    const token = randomUUID?.() ?? randomBytes(16).toString("hex")
+    const metaPath = path.join(lockDir, "meta.json")
+    const heartbeatPath = path.join(lockDir, "heartbeat")
+
+    try {
+      await mkdir(lockDir, { mode: 0o700 })
+    } catch (err) {
+      if (code(err) !== "EEXIST") {
+        throw err
+      }
+
+      if (!(await stale(lockDir, heartbeatPath, metaPath, opts.staleMs))) {
+        return { acquired: false }
+      }
+
+      const breakerPath = lockDir + ".breaker"
+      try {
+        await mkdir(breakerPath, { mode: 0o700 })
+      } catch (claimErr) {
+        const errCode = code(claimErr)
+        if (errCode === "EEXIST") {
+          const breaker = await stats(breakerPath)
+          if (breaker && wall() - breaker.mtimeMs > opts.staleMs) {
+            await rm(breakerPath, { recursive: true, force: true }).catch(() => undefined)
+          }
+          return { acquired: false }
+        }
+
+        if (errCode === "ENOENT" || errCode === "ENOTDIR") {
+          return { acquired: false }
+        }
+
+        throw claimErr
+      }
+
+      try {
+        // Breaker ownership ensures only one contender performs stale cleanup.
+        if (!(await stale(lockDir, heartbeatPath, metaPath, opts.staleMs))) {
+          return { acquired: false }
+        }
+
+        await rm(lockDir, { recursive: true, force: true })
+
+        try {
+          await mkdir(lockDir, { mode: 0o700 })
+        } catch (retryErr) {
+          const errCode = code(retryErr)
+          if (errCode === "EEXIST" || errCode === "ENOTEMPTY") {
+            return { acquired: false }
+          }
+          throw retryErr
+        }
+      } finally {
+        await rm(breakerPath, { recursive: true, force: true }).catch(() => undefined)
+      }
+    }
+
+    const meta = {
+      token,
+      pid: process.pid,
+      hostname: os.hostname(),
+      createdAt: new Date().toISOString(),
+    }
+
+    await writeFile(heartbeatPath, "", { flag: "wx" }).catch(async () => {
+      await rm(lockDir, { recursive: true, force: true })
+      throw new Error("Lock acquired but heartbeat already existed (possible compromise).")
+    })
+
+    await writeFile(metaPath, JSON.stringify(meta, null, 2), { flag: "wx" }).catch(async () => {
+      await rm(lockDir, { recursive: true, force: true })
+      throw new Error("Lock acquired but meta.json already existed (possible compromise).")
+    })
+
+    let timer: NodeJS.Timeout | undefined
+
+    const startHeartbeat = (intervalMs = Math.max(100, Math.floor(opts.staleMs / 3))) => {
+      if (timer) return
+      // Heartbeat prevents long critical sections from being evicted as stale.
+      timer = setInterval(() => {
+        const t = new Date()
+        void utimes(heartbeatPath, t, t).catch(() => undefined)
+      }, intervalMs)
+      timer.unref?.()
+    }
+
+    const release = async () => {
+      if (timer) {
+        clearInterval(timer)
+        timer = undefined
+      }
+
+      const current = await readFile(metaPath, "utf8")
+        .then((raw) => {
+          const parsed = JSON.parse(raw)
+          if (!parsed || typeof parsed !== "object") return {}
+          return {
+            token: "token" in parsed && typeof parsed.token === "string" ? parsed.token : undefined,
+          }
+        })
+        .catch((err) => {
+          const errCode = code(err)
+          if (errCode === "ENOENT" || errCode === "ENOTDIR") {
+            throw new Error("Refusing to release: lock is compromised (metadata missing).")
+          }
+          if (err instanceof SyntaxError) {
+            throw new Error("Refusing to release: lock is compromised (metadata invalid).")
+          }
+          throw err
+        })
+      // Token check prevents deleting a lock that was re-acquired by another process.
+      if (current.token !== token) {
+        throw new Error("Refusing to release: lock token mismatch (not the owner).")
+      }
+
+      await rm(lockDir, { recursive: true, force: true })
+    }
+
+    return {
+      acquired: true,
+      startHeartbeat,
+      release,
+    }
+  }
+
+  async function acquireLockDir(
+    lockDir: string,
+    input: { key: string; onWait?: Wait; signal?: AbortSignal },
+    opts: Opts,
+  ) {
+    const stop = mono() + opts.timeoutMs
+    let attempt = 0
+    let waited = 0
+    let delay = opts.baseDelayMs
+
+    while (true) {
+      input.signal?.throwIfAborted()
+
+      const res = await tryAcquireLockDir(lockDir, opts)
+      if (res.acquired) {
+        return res
+      }
+
+      if (mono() > stop) {
+        throw new Error(`Timed out waiting for lock: ${input.key}`)
+      }
+
+      attempt += 1
+      const ms = jitter(delay)
+      await input.onWait?.({
+        key: input.key,
+        attempt,
+        delay: ms,
+        waited,
+      })
+      await sleep(ms, input.signal)
+      waited += ms
+      delay = Math.min(opts.maxDelayMs, Math.floor(delay * 1.7))
+    }
+  }
+
+  export async function acquire(key: string, input: Options = {}): Promise<Lease> {
+    input.signal?.throwIfAborted()
+    const cfg: Opts = {
+      staleMs: input.staleMs ?? defaultOpts.staleMs,
+      timeoutMs: input.timeoutMs ?? defaultOpts.timeoutMs,
+      baseDelayMs: input.baseDelayMs ?? defaultOpts.baseDelayMs,
+      maxDelayMs: input.maxDelayMs ?? defaultOpts.maxDelayMs,
+    }
+    const dir = input.dir ?? root
+
+    await mkdir(dir, { recursive: true })
+    const lockfile = path.join(dir, Hash.fast(key) + ".lock")
+    const lock = await acquireLockDir(
+      lockfile,
+      {
+        key,
+        onWait: input.onWait,
+        signal: input.signal,
+      },
+      cfg,
+    )
+    lock.startHeartbeat()
+
+    const release = () => lock.release()
+    return {
+      release,
+      [Symbol.asyncDispose]() {
+        return release()
+      },
+    }
+  }
+
+  export async function withLock<T>(key: string, fn: () => Promise<T>, input: Options = {}) {
+    await using _ = await acquire(key, input)
+    input.signal?.throwIfAborted()
+    return await fn()
+  }
+}

packages/opencode/src/util/network.ts

@@ -1,3 +1,9 @@
+export function online() {
+  const nav = globalThis.navigator
+  if (!nav || typeof nav.onLine !== "boolean") return true
+  return nav.onLine
+}
+
 export function proxied() {
   return !!(process.env.HTTP_PROXY || process.env.HTTPS_PROXY || process.env.http_proxy || process.env.https_proxy)
 }

packages/opencode/src/util/process.ts

@@ -1,6 +1,7 @@
 import { type ChildProcess } from "child_process"
 import launch from "cross-spawn"
 import { buffer } from "node:stream/consumers"
+import { errorMessage } from "./error"
 
 export namespace Process {
   export type Stdio = "inherit" | "pipe" | "ignore"
@@ -136,7 +137,7 @@ export namespace Process {
         return {
           code: 1,
           stdout: Buffer.alloc(0),
-          stderr: Buffer.from(err instanceof Error ? err.message : String(err)),
+          stderr: Buffer.from(errorMessage(err)),
         }
       })
     if (out.code === 0 || opts.nothrow) return out

packages/opencode/src/util/record.ts

@@ -0,0 +1,3 @@
+export function isRecord(value: unknown): value is Record<string, unknown> {
+  return !!value && typeof value === "object" && !Array.isArray(value)
+}

packages/opencode/src/worktree/index.ts

@@ -9,6 +9,7 @@ import { ProjectTable } from "../project/project.sql"
 import type { ProjectID } from "../project/schema"
 import { Log } from "../util/log"
 import { Slug } from "@opencode-ai/util/slug"
+import { errorMessage } from "../util/error"
 import { BusEvent } from "@/bus/bus-event"
 import { GlobalBus } from "@/bus/global"
 import { Effect, Layer, Path, Scope, ServiceMap, Stream } from "effect"
@@ -260,7 +261,7 @@ export namespace Worktree {
           })
             .then(() => true)
             .catch((error) => {
-              const message = error instanceof Error ? error.message : String(error)
+              const message = errorMessage(error)
               log.error("worktree bootstrap failed", { directory: info.directory, message })
               GlobalBus.emit("event", {
                 directory: info.directory,
@@ -344,9 +345,12 @@ export namespace Worktree {
 
       function cleanDirectory(target: string) {
         return Effect.promise(() =>
-          import("fs/promises").then((fsp) =>
-            fsp.rm(target, { recursive: true, force: true, maxRetries: 5, retryDelay: 100 }),
-          ),
+          import("fs/promises")
+            .then((fsp) => fsp.rm(target, { recursive: true, force: true, maxRetries: 5, retryDelay: 100 }))
+            .catch((error) => {
+              const message = errorMessage(error)
+              throw new RemoveFailedError({ message: message || "Failed to remove git worktree directory" })
+            }),
         )
       }