fix(app): added/deleted file status now correctly calculated

packages/opencode/test/snapshot/snapshot.test.ts

@@ -749,6 +749,52 @@ test("revert preserves file that existed in snapshot when deleted then recreated
   })
 })
 
+test("diffFull sets status based on git change type", async () => {
+  await using tmp = await bootstrap()
+  await Instance.provide({
+    directory: tmp.path,
+    fn: async () => {
+      await Bun.write(`${tmp.path}/grow.txt`, "one\n")
+      await Bun.write(`${tmp.path}/trim.txt`, "line1\nline2\n")
+      await Bun.write(`${tmp.path}/delete.txt`, "gone")
+
+      const before = await Snapshot.track()
+      expect(before).toBeTruthy()
+
+      await Bun.write(`${tmp.path}/grow.txt`, "one\ntwo\n")
+      await Bun.write(`${tmp.path}/trim.txt`, "line1\n")
+      await $`rm ${tmp.path}/delete.txt`.quiet()
+      await Bun.write(`${tmp.path}/added.txt`, "new")
+
+      const after = await Snapshot.track()
+      expect(after).toBeTruthy()
+
+      const diffs = await Snapshot.diffFull(before!, after!)
+      expect(diffs.length).toBe(4)
+
+      const added = diffs.find((d) => d.file === "added.txt")
+      expect(added).toBeDefined()
+      expect(added!.status).toBe("added")
+
+      const deleted = diffs.find((d) => d.file === "delete.txt")
+      expect(deleted).toBeDefined()
+      expect(deleted!.status).toBe("deleted")
+
+      const grow = diffs.find((d) => d.file === "grow.txt")
+      expect(grow).toBeDefined()
+      expect(grow!.status).toBe("modified")
+      expect(grow!.additions).toBeGreaterThan(0)
+      expect(grow!.deletions).toBe(0)
+
+      const trim = diffs.find((d) => d.file === "trim.txt")
+      expect(trim).toBeDefined()
+      expect(trim!.status).toBe("modified")
+      expect(trim!.additions).toBe(0)
+      expect(trim!.deletions).toBeGreaterThan(0)
+    },
+  })
+})
+
 test("diffFull with new file additions", async () => {
   await using tmp = await bootstrap()
   await Instance.provide({