refactor(opencode): replace Bun shell in core flows (#16286)

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

@@ -1,7 +1,8 @@
 import { UI } from "../ui"
 import { cmd } from "./cmd"
 import { Instance } from "@/project/instance"
-import { $ } from "bun"
+import { Process } from "@/util/process"
+import { git } from "@/util/git"
 
 export const PrCommand = cmd({
   command: "pr <number>",
@@ -27,21 +28,35 @@ export const PrCommand = cmd({
         UI.println(`Fetching and checking out PR #${prNumber}...`)
 
         // Use gh pr checkout with custom branch name
-        const result = await $`gh pr checkout ${prNumber} --branch ${localBranchName} --force`.nothrow()
+        const result = await Process.run(
+          ["gh", "pr", "checkout", `${prNumber}`, "--branch", localBranchName, "--force"],
+          {
+            nothrow: true,
+          },
+        )
 
-        if (result.exitCode !== 0) {
+        if (result.code !== 0) {
           UI.error(`Failed to checkout PR #${prNumber}. Make sure you have gh CLI installed and authenticated.`)
           process.exit(1)
         }
 
         // Fetch PR info for fork handling and session link detection
-        const prInfoResult =
-          await $`gh pr view ${prNumber} --json headRepository,headRepositoryOwner,isCrossRepository,headRefName,body`.nothrow()
+        const prInfoResult = await Process.text(
+          [
+            "gh",
+            "pr",
+            "view",
+            `${prNumber}`,
+            "--json",
+            "headRepository,headRepositoryOwner,isCrossRepository,headRefName,body",
+          ],
+          { nothrow: true },
+        )
 
         let sessionId: string | undefined
 
-        if (prInfoResult.exitCode === 0) {
-          const prInfoText = prInfoResult.text()
+        if (prInfoResult.code === 0) {
+          const prInfoText = prInfoResult.text
           if (prInfoText.trim()) {
             const prInfo = JSON.parse(prInfoText)
 
@@ -52,15 +67,19 @@ export const PrCommand = cmd({
               const remoteName = forkOwner
 
               // Check if remote already exists
-              const remotes = (await $`git remote`.nothrow().text()).trim()
+              const remotes = (await git(["remote"], { cwd: Instance.worktree })).text().trim()
               if (!remotes.split("\n").includes(remoteName)) {
-                await $`git remote add ${remoteName} https://github.com/${forkOwner}/${forkName}.git`.nothrow()
+                await git(["remote", "add", remoteName, `https://github.com/${forkOwner}/${forkName}.git`], {
+                  cwd: Instance.worktree,
+                })
                 UI.println(`Added fork remote: ${remoteName}`)
               }
 
               // Set upstream to the fork so pushes go there
               const headRefName = prInfo.headRefName
-              await $`git branch --set-upstream-to=${remoteName}/${headRefName} ${localBranchName}`.nothrow()
+              await git(["branch", `--set-upstream-to=${remoteName}/${headRefName}`, localBranchName], {
+                cwd: Instance.worktree,
+              })
             }
 
             // Check for opencode session link in PR body
@@ -71,9 +90,11 @@ export const PrCommand = cmd({
                 UI.println(`Found opencode session: ${sessionUrl}`)
                 UI.println(`Importing session...`)
 
-                const importResult = await $`opencode import ${sessionUrl}`.nothrow()
-                if (importResult.exitCode === 0) {
-                  const importOutput = importResult.text().trim()
+                const importResult = await Process.text(["opencode", "import", sessionUrl], {
+                  nothrow: true,
+                })
+                if (importResult.code === 0) {
+                  const importOutput = importResult.text.trim()
                   // Extract session ID from the output (format: "Imported session: <session-id>")
                   const sessionIdMatch = importOutput.match(/Imported session: ([a-zA-Z0-9_-]+)/)
                   if (sessionIdMatch) {