feat: adjust read tool so that it can handle dirs too (#13090)

packages/opencode/test/tool/read.test.ts

@@ -78,6 +78,32 @@ describe("tool.read external_directory permission", () => {
     })
   })
 
+  test("asks for directory-scoped external_directory permission when reading external directory", async () => {
+    await using outerTmp = await tmpdir({
+      init: async (dir) => {
+        await Bun.write(path.join(dir, "external", "a.txt"), "a")
+      },
+    })
+    await using tmp = await tmpdir({ git: true })
+    await Instance.provide({
+      directory: tmp.path,
+      fn: async () => {
+        const read = await ReadTool.init()
+        const requests: Array<Omit<PermissionNext.Request, "id" | "sessionID" | "tool">> = []
+        const testCtx = {
+          ...ctx,
+          ask: async (req: Omit<PermissionNext.Request, "id" | "sessionID" | "tool">) => {
+            requests.push(req)
+          },
+        }
+        await read.execute({ filePath: path.join(outerTmp.path, "external") }, testCtx)
+        const extDirReq = requests.find((r) => r.permission === "external_directory")
+        expect(extDirReq).toBeDefined()
+        expect(extDirReq!.patterns).toContain(path.join(outerTmp.path, "external", "*"))
+      },
+    })
+  })
+
   test("asks for external_directory permission when reading relative path outside project", async () => {
     await using tmp = await tmpdir({ git: true })
     await Instance.provide({
@@ -249,6 +275,25 @@ describe("tool.read truncation", () => {
     })
   })
 
+  test("does not mark final directory page as truncated", async () => {
+    await using tmp = await tmpdir({
+      init: async (dir) => {
+        await Promise.all(
+          Array.from({ length: 10 }, (_, i) => Bun.write(path.join(dir, "dir", `file-${i}.txt`), `line${i}`)),
+        )
+      },
+    })
+    await Instance.provide({
+      directory: tmp.path,
+      fn: async () => {
+        const read = await ReadTool.init()
+        const result = await read.execute({ filePath: path.join(tmp.path, "dir"), offset: 5, limit: 5 }, ctx)
+        expect(result.metadata.truncated).toBe(false)
+        expect(result.output).not.toContain("Showing 5 of 10 entries")
+      },
+    })
+  })
+
   test("truncates long lines", async () => {
     await using tmp = await tmpdir({
       init: async (dir) => {