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

packages/opencode/src/snapshot/index.ts

@@ -188,6 +188,7 @@ export namespace Snapshot {
       after: z.string(),
       additions: z.number(),
       deletions: z.number(),
+      status: z.enum(["added", "deleted", "modified"]).optional(),
     })
     .meta({
       ref: "FileDiff",
@@ -196,6 +197,23 @@ export namespace Snapshot {
   export async function diffFull(from: string, to: string): Promise<FileDiff[]> {
     const git = gitdir()
     const result: FileDiff[] = []
+    const status = new Map<string, "added" | "deleted" | "modified">()
+
+    const statuses =
+      await $`git -c core.autocrlf=false -c core.quotepath=false --git-dir ${git} --work-tree ${Instance.worktree} diff --no-ext-diff --name-status --no-renames ${from} ${to} -- .`
+        .quiet()
+        .cwd(Instance.directory)
+        .nothrow()
+        .text()
+
+    for (const line of statuses.trim().split("\n")) {
+      if (!line) continue
+      const [code, file] = line.split("\t")
+      if (!code || !file) continue
+      const kind = code.startsWith("A") ? "added" : code.startsWith("D") ? "deleted" : "modified"
+      status.set(file, kind)
+    }
+
     for await (const line of $`git -c core.autocrlf=false -c core.quotepath=false --git-dir ${git} --work-tree ${Instance.worktree} diff --no-ext-diff --no-renames --numstat ${from} ${to} -- .`
       .quiet()
       .cwd(Instance.directory)
@@ -224,6 +242,7 @@ export namespace Snapshot {
         after,
         additions: Number.isFinite(added) ? added : 0,
         deletions: Number.isFinite(deleted) ? deleted : 0,
+        status: status.get(file) ?? "modified",
       })
     }
     return result

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({