refactor(server): replace Bun serve with Hono node adapters (#18335)

Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>
Co-authored-by: Luke Parker <10430890+Hona@users.noreply.github.com>
Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com>
Co-authored-by: Brendan Allan <git@brendonovich.dev>

packages/opencode/script/build-node.ts

@@ -1,5 +1,6 @@
 #!/usr/bin/env bun
 
+import { $ } from "bun"
 import { Script } from "@opencode-ai/script"
 import fs from "fs"
 import path from "path"
@@ -8,6 +9,15 @@ import { fileURLToPath } from "url"
 const __filename = fileURLToPath(import.meta.url)
 const __dirname = path.dirname(__filename)
 const dir = path.resolve(__dirname, "..")
+const root = path.resolve(dir, "../..")
+
+function linker(): "hoisted" | "isolated" {
+  // jsonc-parser is only declared in packages/opencode, so its install location
+  // tells us whether Bun used a hoisted or isolated workspace layout.
+  if (fs.existsSync(path.join(dir, "node_modules", "jsonc-parser"))) return "isolated"
+  if (fs.existsSync(path.join(root, "node_modules", "jsonc-parser"))) return "hoisted"
+  throw new Error("Could not detect Bun linker from jsonc-parser")
+}
 
 process.chdir(dir)
 
@@ -41,11 +51,16 @@ const migrations = await Promise.all(
 )
 console.log(`Loaded ${migrations.length} migrations`)
 
+const link = linker()
+
+await $`bun install --linker=${link} --os="*" --cpu="*" @lydell/node-pty@1.2.0-beta.10`
+
 await Bun.build({
   target: "node",
   entrypoints: ["./src/node.ts"],
   outdir: "./dist",
   format: "esm",
+  sourcemap: "linked",
   external: ["jsonc-parser"],
   define: {
     OPENCODE_MIGRATIONS: JSON.stringify(migrations),