fix(cli-run): skip unresolved opencode bin path injection

src/cli/run/opencode-bin-path.test.ts

@@ -10,9 +10,10 @@ describe("prependResolvedOpencodeBinToPath", () => {
       PATH: "/Users/yeongyu/node_modules/.bin:/usr/bin",
     }
     const resolver = () => "/tmp/bunx-123/node_modules/opencode-ai/bin/opencode"
+    const pathExists = () => true
 
     //#when
-    prependResolvedOpencodeBinToPath(env, resolver)
+    prependResolvedOpencodeBinToPath(env, resolver, pathExists)
 
     //#then
     expect(env.PATH).toBe(
@@ -26,9 +27,10 @@ describe("prependResolvedOpencodeBinToPath", () => {
       PATH: "/tmp/bunx-123/node_modules/opencode-ai/bin:/usr/bin",
     }
     const resolver = () => "/tmp/bunx-123/node_modules/opencode-ai/bin/opencode"
+    const pathExists = () => true
 
     //#when
-    prependResolvedOpencodeBinToPath(env, resolver)
+    prependResolvedOpencodeBinToPath(env, resolver, pathExists)
 
     //#then
     expect(env.PATH).toBe("/tmp/bunx-123/node_modules/opencode-ai/bin:/usr/bin")
@@ -49,4 +51,19 @@ describe("prependResolvedOpencodeBinToPath", () => {
     //#then
     expect(env.PATH).toBe("/Users/yeongyu/node_modules/.bin:/usr/bin")
   })
+
+  it("keeps PATH unchanged when resolved binary path does not exist", () => {
+    //#given
+    const env: Record<string, string | undefined> = {
+      PATH: "/Users/yeongyu/node_modules/.bin:/usr/bin",
+    }
+    const resolver = () => "/Users/yeongyu/node_modules/opencode-ai/bin/opencode"
+    const pathExists = () => false
+
+    //#when
+    prependResolvedOpencodeBinToPath(env, resolver, pathExists)
+
+    //#then
+    expect(env.PATH).toBe("/Users/yeongyu/node_modules/.bin:/usr/bin")
+  })
 })

src/cli/run/opencode-bin-path.ts

@@ -1,5 +1,6 @@
 import { delimiter, dirname } from "node:path"
 import { createRequire } from "node:module"
+import { existsSync } from "node:fs"
 
 type EnvLike = Record<string, string | undefined>
 
@@ -8,6 +9,7 @@ const resolveFromCurrentModule = createRequire(import.meta.url).resolve
 export function prependResolvedOpencodeBinToPath(
   env: EnvLike = process.env,
   resolve: (id: string) => string = resolveFromCurrentModule,
+  pathExists: (path: string) => boolean = existsSync,
 ): void {
   let resolvedPath: string
   try {
@@ -16,7 +18,15 @@ export function prependResolvedOpencodeBinToPath(
     return
   }
 
+  if (!pathExists(resolvedPath)) {
+    return
+  }
+
   const opencodeBinDir = dirname(resolvedPath)
+  if (!pathExists(opencodeBinDir)) {
+    return
+  }
+
   const currentPath = env.PATH ?? ""
   const pathSegments = currentPath ? currentPath.split(delimiter) : []