diff --git a/bun.lock b/bun.lock
index 443626164e6..cc0cae83d77 100644
--- a/bun.lock
+++ b/bun.lock
@@ -365,6 +365,7 @@
         "jsonc-parser": "3.3.1",
         "mime-types": "3.0.2",
         "minimatch": "10.0.3",
+        "node-pty": "1.1.0",
         "open": "10.1.2",
         "opentui-spinner": "0.0.6",
         "partial-json": "0.1.7",
@@ -575,8 +576,9 @@
     },
   },
   "trustedDependencies": [
-    "electron",
     "esbuild",
+    "node-pty",
+    "electron",
     "web-tree-sitter",
     "tree-sitter-bash",
   ],
@@ -3813,6 +3815,8 @@
 
     "node-mock-http": ["node-mock-http@1.0.4", "", {}, "sha512-8DY+kFsDkNXy1sJglUfuODx1/opAGJGyrTuFqEoN90oRc2Vk0ZbD4K2qmKXBBEhZQzdKHIVfEJpDU8Ak2NJEvQ=="],
 
+    "node-pty": ["node-pty@1.1.0", "", { "dependencies": { "node-addon-api": "^7.1.0" } }, "sha512-20JqtutY6JPXTUnL0ij1uad7Qe1baT46lyolh2sSENDd4sTzKZ4nmAFkeAARDKwmlLjPx6XKRlwRUxwjOy+lUg=="],
+
     "node-releases": ["node-releases@2.0.27", "", {}, "sha512-nmh3lCkYZ3grZvqcCH+fjmQ7X+H0OeZgP40OierEaAptX4XofMh5kwNbWh7lBduUzCcV/8kZ+NDLCwm2iorIlA=="],
 
     "nopt": ["nopt@9.0.0", "", { "dependencies": { "abbrev": "^4.0.0" }, "bin": { "nopt": "bin/nopt.js" } }, "sha512-Zhq3a+yFKrYwSBluL4H9XP3m3y5uvQkB/09CwDruCiRmR/UJYnn9W4R48ry0uGC70aeTPKLynBtscP9efFFcPw=="],
diff --git a/package.json b/package.json
index 015f3a6c3d6..7e75a708e5d 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
     "dev:web": "bun --cwd packages/app dev",
     "dev:storybook": "bun --cwd packages/storybook storybook",
     "typecheck": "bun turbo typecheck",
+    "postinstall": "bun run --cwd packages/opencode fix-node-pty",
     "prepare": "husky",
     "random": "echo 'Random script'",
     "hello": "echo 'Hello World!'",
@@ -98,6 +99,7 @@
   },
   "trustedDependencies": [
     "esbuild",
+    "node-pty",
     "protobufjs",
     "tree-sitter",
     "tree-sitter-bash",
diff --git a/packages/opencode/package.json b/packages/opencode/package.json
index e3818189b27..1a274a2d7df 100644
--- a/packages/opencode/package.json
+++ b/packages/opencode/package.json
@@ -9,6 +9,7 @@
     "typecheck": "tsgo --noEmit",
     "test": "bun test --timeout 30000 registry",
     "build": "bun run script/build.ts",
+    "fix-node-pty": "bun run script/fix-node-pty.ts",
     "dev": "bun run --conditions=browser ./src/index.ts",
     "random": "echo 'Random script updated at $(date)' && echo 'Change queued successfully' && echo 'Another change made' && echo 'Yet another change' && echo 'One more change' && echo 'Final change' && echo 'Another final change' && echo 'Yet another final change'",
     "clean": "echo 'Cleaning up...' && rm -rf node_modules dist",
@@ -30,6 +31,11 @@
       "bun": "./src/storage/db.bun.ts",
       "node": "./src/storage/db.node.ts",
       "default": "./src/storage/db.bun.ts"
+    },
+    "#pty": {
+      "bun": "./src/pty/pty.bun.ts",
+      "node": "./src/pty/pty.node.ts",
+      "default": "./src/pty/pty.bun.ts"
     }
   },
   "devDependencies": {
@@ -129,6 +135,7 @@
     "jsonc-parser": "3.3.1",
     "mime-types": "3.0.2",
     "minimatch": "10.0.3",
+    "node-pty": "1.1.0",
     "open": "10.1.2",
     "opentui-spinner": "0.0.6",
     "partial-json": "0.1.7",
diff --git a/packages/opencode/script/build-node.ts b/packages/opencode/script/build-node.ts
index 17bc86307af..1d3290b478e 100755
--- a/packages/opencode/script/build-node.ts
+++ b/packages/opencode/script/build-node.ts
@@ -45,7 +45,7 @@ await Bun.build({
   entrypoints: ["./src/node.ts"],
   outdir: "./dist",
   format: "esm",
-  external: ["jsonc-parser"],
+  external: ["jsonc-parser", "node-pty"],
   define: {
     OPENCODE_MIGRATIONS: JSON.stringify(migrations),
   },
diff --git a/packages/opencode/script/fix-node-pty.ts b/packages/opencode/script/fix-node-pty.ts
new file mode 100644
index 00000000000..93641adbdf3
--- /dev/null
+++ b/packages/opencode/script/fix-node-pty.ts
@@ -0,0 +1,28 @@
+#!/usr/bin/env bun
+
+import fs from "fs/promises"
+import path from "path"
+import { fileURLToPath } from "url"
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = path.dirname(__filename)
+const dir = path.resolve(__dirname, "..")
+
+if (process.platform !== "win32") {
+  const root = path.join(dir, "node_modules", "node-pty", "prebuilds")
+  const dirs = await fs.readdir(root, { withFileTypes: true }).catch(() => [])
+  const files = dirs.filter((x) => x.isDirectory()).map((x) => path.join(root, x.name, "spawn-helper"))
+  const result = await Promise.all(
+    files.map(async (file) => {
+      const stat = await fs.stat(file).catch(() => undefined)
+      if (!stat) return
+      if ((stat.mode & 0o111) === 0o111) return
+      await fs.chmod(file, stat.mode | 0o755)
+      return file
+    }),
+  )
+  const fixed = result.filter(Boolean)
+  if (fixed.length) {
+    console.log(`fixed node-pty permissions for ${fixed.length} helper${fixed.length === 1 ? "" : "s"}`)
+  }
+}
diff --git a/packages/opencode/src/pty/index.ts b/packages/opencode/src/pty/index.ts
index 791062aaff2..7014cb6f0c3 100644
--- a/packages/opencode/src/pty/index.ts
+++ b/packages/opencode/src/pty/index.ts
@@ -1,6 +1,6 @@
 import { BusEvent } from "@/bus/bus-event"
 import { Bus } from "@/bus"
-import { type IPty } from "bun-pty"
+import type { Proc } from "#pty"
 import z from "zod"
 import { Identifier } from "../id/id"
 import { Log } from "../util/log"
@@ -35,10 +35,7 @@ export namespace Pty {
     return out
   }
 
-  const pty = lazy(async () => {
-    const { spawn } = await import("bun-pty")
-    return spawn
-  })
+  const pty = lazy(() => import("#pty"))
 
   export const Info = z
     .object({
@@ -85,7 +82,7 @@ export namespace Pty {
 
   interface ActiveSession {
     info: Info
-    process: IPty
+    process: Proc
     buffer: string
     bufferCursor: number
     cursor: number
@@ -144,7 +141,7 @@ export namespace Pty {
     }
     log.info("creating session", { id, cmd: command, args, cwd })
 
-    const spawn = await pty()
+    const { spawn } = await pty()
     const ptyProcess = spawn(command, args, {
       name: "xterm-256color",
       cwd,
diff --git a/packages/opencode/src/pty/pty.bun.ts b/packages/opencode/src/pty/pty.bun.ts
new file mode 100644
index 00000000000..1f8ce8e4546
--- /dev/null
+++ b/packages/opencode/src/pty/pty.bun.ts
@@ -0,0 +1,26 @@
+import { spawn as create } from "bun-pty"
+import type { Opts, Proc } from "./pty"
+
+export type { Disp, Exit, Opts, Proc } from "./pty"
+
+export function spawn(file: string, args: string[], opts: Opts): Proc {
+  const pty = create(file, args, opts)
+  return {
+    pid: pty.pid,
+    onData(listener) {
+      return pty.onData(listener)
+    },
+    onExit(listener) {
+      return pty.onExit(listener)
+    },
+    write(data) {
+      pty.write(data)
+    },
+    resize(cols, rows) {
+      pty.resize(cols, rows)
+    },
+    kill(signal) {
+      pty.kill(signal)
+    },
+  }
+}
diff --git a/packages/opencode/src/pty/pty.node.ts b/packages/opencode/src/pty/pty.node.ts
new file mode 100644
index 00000000000..5256fa061fb
--- /dev/null
+++ b/packages/opencode/src/pty/pty.node.ts
@@ -0,0 +1,26 @@
+import * as pty from "node-pty"
+import type { Opts, Proc } from "./pty"
+
+export type { Disp, Exit, Opts, Proc } from "./pty"
+
+export function spawn(file: string, args: string[], opts: Opts): Proc {
+  const proc = pty.spawn(file, args, opts)
+  return {
+    pid: proc.pid,
+    onData(listener) {
+      return proc.onData(listener)
+    },
+    onExit(listener) {
+      return proc.onExit(listener)
+    },
+    write(data) {
+      proc.write(data)
+    },
+    resize(cols, rows) {
+      proc.resize(cols, rows)
+    },
+    kill(signal) {
+      proc.kill(signal)
+    },
+  }
+}
diff --git a/packages/opencode/src/pty/pty.ts b/packages/opencode/src/pty/pty.ts
new file mode 100644
index 00000000000..fbd1710e52a
--- /dev/null
+++ b/packages/opencode/src/pty/pty.ts
@@ -0,0 +1,25 @@
+export type Disp = {
+  dispose(): void
+}
+
+export type Exit = {
+  exitCode: number
+  signal?: number | string
+}
+
+export type Opts = {
+  name: string
+  cols?: number
+  rows?: number
+  cwd?: string
+  env?: Record<string, string>
+}
+
+export type Proc = {
+  pid: number
+  onData(listener: (data: string) => void): Disp
+  onExit(listener: (event: Exit) => void): Disp
+  write(data: string): void
+  resize(cols: number, rows: number): void
+  kill(signal?: string): void
+}
diff --git a/packages/opencode/src/server/server.ts b/packages/opencode/src/server/server.ts
index ab7394daa1a..601dc85a8fb 100644
--- a/packages/opencode/src/server/server.ts
+++ b/packages/opencode/src/server/server.ts
@@ -25,7 +25,7 @@ import { WorkspaceContext } from "../control-plane/workspace-context"
 import { WorkspaceRouterMiddleware } from "../control-plane/workspace-router-middleware"
 import { ProjectRoutes } from "./routes/project"
 import { SessionRoutes } from "./routes/session"
-// import { PtyRoutes } from "./routes/pty"
+import { PtyRoutes } from "./routes/pty"
 import { McpRoutes } from "./routes/mcp"
 import { FileRoutes } from "./routes/file"
 import { ConfigRoutes } from "./routes/config"
@@ -559,7 +559,7 @@ export namespace Server {
           })
         },
       )
-      // .route("/pty", PtyRoutes(ws.upgradeWebSocket))
+      .route("/pty", PtyRoutes(ws.upgradeWebSocket))
       .all("/*", async (c) => {
         const path = c.req.path