fix(shared): route Bun runtime calls through shims

src/features/opencode-runtime-skills/source-server.ts

@@ -5,6 +5,30 @@ export type RuntimeSkillSourceServer = {
   readonly stop: () => void
 }
 
+type BunServeServer = {
+  readonly url: URL
+  stop(closeActiveConnections?: boolean): void
+}
+
+type BunServeRuntime = {
+  serve(options: {
+    readonly hostname: string
+    readonly port: number
+    readonly fetch: (request: Request) => Response | Promise<Response>
+  }): BunServeServer
+}
+
+const runtime = globalThis as typeof globalThis & { Bun?: BunServeRuntime }
+
+function getBunServeRuntime(): BunServeRuntime {
+  const bunRuntime = runtime.Bun
+  if (typeof bunRuntime === "undefined") {
+    throw new Error("createRuntimeSkillSourceServer requires Bun runtime")
+  }
+
+  return bunRuntime
+}
+
 function jsonResponse(body: unknown): Response {
   return Response.json(body, {
     headers: {
@@ -25,6 +49,7 @@ function markdownResponse(markdown: string): Response {
 export function createRuntimeSkillSourceServer(options: {
   readonly skills: readonly RuntimeSkillSourceEntry[]
 }): RuntimeSkillSourceServer {
+  const bunRuntime = getBunServeRuntime()
   const skillMarkdownByPath = new Map(
     options.skills.map((skill) => [`/${skill.name}/SKILL.md`, skill.markdown]),
   )
@@ -35,7 +60,7 @@ export function createRuntimeSkillSourceServer(options: {
     })),
   }
 
-  const server = Bun.serve({
+  const server = bunRuntime.serve({
     hostname: "127.0.0.1",
     port: 0,
     fetch(request) {

src/shared/git-executable.ts

@@ -1,4 +1,5 @@
 import { existsSync } from "node:fs"
+import { bunWhich } from "./bun-which-shim"
 
 const GIT_EXECUTABLE_CANDIDATES = [
   "/usr/bin/git",
@@ -13,9 +14,5 @@ export function resolveGitExecutable(): string {
     }
   }
 
-  if (typeof Bun !== "undefined") {
-    return Bun.which("git") ?? "git"
-  }
-
-  return "git"
+  return bunWhich("git") ?? "git"
 }