fix(session): accept legacy summary diffs (#26579)

Co-authored-by: Developer <temp@example.com>

packages/app/src/pages/session/session-side-panel.tsx

@@ -28,6 +28,12 @@ import { createOpenSessionFileTab, createSessionTabs, getTabReorderIndex, type S
 import { setSessionHandoff } from "@/pages/session/handoff"
 import { useSessionLayout } from "@/pages/session/session-layout"
 
+type RenderDiff = (SnapshotFileDiff & { file: string }) | VcsFileDiff
+
+function renderDiff(value: SnapshotFileDiff | VcsFileDiff): value is RenderDiff {
+  return typeof value.file === "string"
+}
+
 export function SessionSidePanel(props: {
   canReview: () => boolean
   diffs: () => (SnapshotFileDiff | VcsFileDiff)[]
@@ -70,7 +76,8 @@ export function SessionSidePanel(props: {
   })
   const treeWidth = createMemo(() => (fileOpen() ? `${layout.fileTree.width()}px` : "0px"))
 
-  const diffFiles = createMemo(() => props.diffs().map((d) => d.file))
+  const diffs = createMemo(() => props.diffs().filter(renderDiff))
+  const diffFiles = createMemo(() => diffs().map((d) => d.file))
   const kinds = createMemo(() => {
     const merge = (a: "add" | "del" | "mix" | undefined, b: "add" | "del" | "mix") => {
       if (!a) return b
@@ -81,7 +88,7 @@ export function SessionSidePanel(props: {
     const normalize = (p: string) => p.replaceAll("\\\\", "/").replace(/\/+$/, "")
 
     const out = new Map<string, "add" | "del" | "mix">()
-    for (const diff of props.diffs()) {
+    for (const diff of diffs()) {
       const file = normalize(diff.file)
       const kind = diff.status === "added" ? "add" : diff.status === "deleted" ? "del" : "mix"
 

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

@@ -23,10 +23,10 @@ function span(id: string, value: { value: string; start: number; end: number })
   }
 }
 
-function diff(kind: string, diffs: { file: string; patch?: string }[] | undefined) {
+function diff(kind: string, diffs: { file?: string; patch?: string }[] | undefined) {
   return diffs?.map((item, i) => ({
     ...item,
-    file: redact(`${kind}-file`, String(i), item.file),
+    file: item.file === undefined ? undefined : redact(`${kind}-file`, String(i), item.file),
     patch: item.patch === undefined ? undefined : redact(`${kind}-patch`, String(i), item.patch),
   }))
 }

packages/opencode/src/cli/cmd/tui/plugin/api.tsx

@@ -148,7 +148,9 @@ function stateApi(sync: ReturnType<typeof useSync>): TuiPluginApi["state"] {
         return sync.data.session.length
       },
       diff(sessionID) {
-        return sync.data.session_diff[sessionID] ?? []
+        return (sync.data.session_diff[sessionID] ?? []).flatMap((item) =>
+          item.file === undefined ? [] : [{ ...item, file: item.file }],
+        )
       },
       todo(sessionID) {
         return sync.data.todo[sessionID] ?? []

packages/opencode/src/session/summary.ts

@@ -134,6 +134,7 @@ export const layer = Layer.effect(
         .read<Snapshot.FileDiff[]>(["session_diff", input.sessionID])
         .pipe(Effect.catch(() => Effect.succeed([] as Snapshot.FileDiff[])))
       const next = diffs.map((item) => {
+        if (item.file === undefined) return item
         const file = unquoteGitPath(item.file)
         if (file === item.file) return item
         return { ...item, file }

packages/opencode/src/snapshot/index.ts

@@ -20,10 +20,10 @@ export const Patch = Schema.Struct({
 export type Patch = typeof Patch.Type
 
 export const FileDiff = Schema.Struct({
-  file: Schema.String,
   // Optional because legacy/imported `summary_diffs` on disk may omit
-  // the patch text (see #26574). Required-Schema rejected the whole
+  // file details and patch text. Required Schema rejected the whole
-  // /session/<id>/diff response and broke session loading on Desktop.
+  // session response and broke session loading on Desktop.
+  file: Schema.optional(Schema.String),
   patch: Schema.optional(Schema.String),
   additions: NonNegativeInt,
   deletions: NonNegativeInt,

packages/opencode/test/server/httpapi-session.test.ts

@@ -297,6 +297,36 @@ describe("session HttpApi", () => {
     ),
   )
 
+  it.live(
+    "serves sessions with migrated summary diffs missing file details",
+    withTmp({ git: true, config: { formatter: false, lsp: false } }, (tmp) =>
+      Effect.gen(function* () {
+        const session = yield* createSession(tmp.path, { title: "legacy diff" })
+        yield* Effect.sync(() =>
+          Database.use((db) =>
+            db
+              .update(SessionTable)
+              .set({
+                summary_additions: 1,
+                summary_deletions: 0,
+                summary_files: 1,
+                summary_diffs: [{ additions: 1, deletions: 0 }],
+              })
+              .where(eq(SessionTable.id, session.id))
+              .run(),
+          ),
+        )
+
+        const response = yield* request(pathFor(SessionPaths.get, { sessionID: session.id }), {
+          headers: { "x-opencode-directory": tmp.path },
+        })
+
+        expect(response.status).toBe(200)
+        expect((yield* json<Session.Info>(response)).summary?.diffs).toEqual([{ additions: 1, deletions: 0 }])
+      }),
+    ),
+  )
+
   it.live(
     "serves lifecycle mutation routes",
     withTmp({ git: true, config: { formatter: false, lsp: false, share: "disabled" } }, (tmp) =>

packages/opencode/test/session/schema-decoding.test.ts

@@ -83,6 +83,26 @@ describe("Session.Info", () => {
     expect(Session.Info.zod.parse(input)).toEqual(input)
   })
 
+  test("accepts migrated summary diffs without file details", () => {
+    const input = {
+      id: sessionID,
+      slug: "legacy-diff",
+      projectID,
+      directory: "/tmp/proj",
+      title: "Legacy diff",
+      version: "0.1.0",
+      summary: {
+        additions: 1,
+        deletions: 0,
+        files: 1,
+        diffs: [{ additions: 1, deletions: 0 }],
+      },
+      time: { created: 1, updated: 2 },
+    }
+    expect(decode(input)).toEqual(input)
+    expect(Session.Info.zod.parse(input)).toEqual(input)
+  })
+
   test("rejects unbranded session id", () => {
     const bad = { id: "not-a-session-id" } as unknown
     expect(() => decode(bad)).toThrow()

packages/opencode/test/session/snapshot-tool-race.test.ts

@@ -238,7 +238,7 @@ it.live("tool execution produces non-empty session diff (snapshot race)", () =>
       expect(tool?.state.status).toBe("completed")
 
       // Poll for diff — summarize() is fire-and-forget
-      let diff: Array<{ file: string }> = []
+      let diff: Array<{ file?: string }> = []
       for (let i = 0; i < 50; i++) {
         diff = yield* summary.diff({ sessionID: session.id })
         if (diff.length > 0) break

packages/sdk/js/src/v2/gen/types.gen.ts

@@ -119,7 +119,7 @@ export type PermissionRequest = {
 }
 
 export type SnapshotFileDiff = {
-  file: string
+  file?: string
   patch?: string
   additions: number
   deletions: number

packages/ui/src/components/session-diff.ts

@@ -12,7 +12,8 @@ type LegacyDiff = {
   status?: "added" | "deleted" | "modified"
 }
 
-type ReviewDiff = SnapshotFileDiff | VcsFileDiff | LegacyDiff
+type SnapshotDiff = SnapshotFileDiff & { file: string }
+type ReviewDiff = SnapshotDiff | VcsFileDiff | LegacyDiff
 
 export type ViewDiff = {
   file: string

packages/ui/src/components/session-review.tsx

@@ -62,7 +62,12 @@ export type SessionReviewCommentActions = {
 
 export type SessionReviewFocus = { file: string; id: string }
 
-type ReviewDiff = (SnapshotFileDiff | VcsFileDiff) & { preloaded?: PreloadMultiFileDiffResult<any> }
+type RawReviewDiff = (SnapshotFileDiff | VcsFileDiff) & {
+  preloaded?: PreloadMultiFileDiffResult<any>
+}
+type ReviewDiff = ((SnapshotFileDiff & { file: string }) | VcsFileDiff) & {
+  preloaded?: PreloadMultiFileDiffResult<any>
+}
 type Item = ViewDiff & { preloaded?: PreloadMultiFileDiffResult<any> }
 
 function diff(value: unknown): value is ReviewDiff {
@@ -108,7 +113,7 @@ export interface SessionReviewProps {
   classList?: Record<string, boolean | undefined>
   classes?: { root?: string; header?: string; container?: string }
   actions?: JSX.Element
-  diffs: ReviewDiff[]
+  diffs: RawReviewDiff[]
   onViewFile?: (file: string) => void
   readFile?: (path: string) => Promise<FileContent | undefined>
   lineCommentMention?: LineCommentEditorProps["mention"]

packages/ui/src/components/session-turn.tsx

@@ -90,6 +90,12 @@ function list<T>(value: T[] | undefined | null, fallback: T[]) {
   return fallback
 }
 
+type SummaryDiff = SnapshotFileDiff & { file: string }
+
+function summaryDiff(value: SnapshotFileDiff): value is SummaryDiff {
+  return typeof value.file === "string"
+}
+
 const hidden = new Set(["todowrite"])
 
 function partState(part: PartType, showReasoningSummaries: boolean) {
@@ -169,7 +175,7 @@ export function SessionTurn(
   const emptyMessages: MessageType[] = []
   const emptyParts: PartType[] = []
   const emptyAssistant: AssistantMessage[] = []
-  const emptyDiffs: SnapshotFileDiff[] = []
+  const emptyDiffs: SummaryDiff[] = []
   const idle = { type: "idle" as const }
 
   const allMessages = createMemo(() => props.messages ?? list(data.store.message?.[props.sessionID], emptyMessages))
@@ -238,7 +244,8 @@ export function SessionTurn(
 
     const seen = new Set<string>()
     return files
-      .reduceRight<SnapshotFileDiff[]>((result, diff) => {
+      .reduceRight<SummaryDiff[]>((result, diff) => {
+        if (!summaryDiff(diff)) return result
         if (seen.has(diff.file)) return result
         seen.add(diff.file)
         result.push(diff)