feat(app): session timeline/turn rework (#13196)

Co-authored-by: David Hill <[email protected]>

5 files changed, 54 insertions, 6 deletions

diff --git a/packages/app/src/context/command.tsx b/packages/app/src/context/command.tsx
index 03437c973..03bd6318d 100644
--- a/packages/app/src/context/command.tsx
+++ b/packages/app/src/context/command.tsx
@@ -11,7 +11,7 @@ const IS_MAC = typeof navigator === "object" && /(Mac|iPod|iPhone|iPad)/.test(na
 const PALETTE_ID = "command.palette"
 const DEFAULT_PALETTE_KEYBIND = "mod+shift+p"
 const SUGGESTED_PREFIX = "suggested."
-const EDITABLE_KEYBIND_IDS = new Set(["terminal.toggle", "terminal.new"])
+const EDITABLE_KEYBIND_IDS = new Set(["terminal.toggle", "terminal.new", "file.attach"])
 
 function actionId(id: string) {
   if (!id.startsWith(SUGGESTED_PREFIX)) return id
diff --git a/packages/app/src/context/global-sync.tsx b/packages/app/src/context/global-sync.tsx
index ec5efc675..9733b72af 100644
--- a/packages/app/src/context/global-sync.tsx
+++ b/packages/app/src/context/global-sync.tsx
@@ -4,6 +4,7 @@ import {
   type Project,
   type ProviderAuthResponse,
   type ProviderListResponse,
+  type Todo,
   createOpencodeClient,
 } from "@opencode-ai/sdk/v2/client"
 import { createStore, produce, reconcile } from "solid-js/store"
@@ -41,6 +42,9 @@ type GlobalStore = {
   error?: InitError
   path: Path
   project: Project[]
+  session_todo: {
+    [sessionID: string]: Todo[]
+  }
   provider: ProviderListResponse
   provider_auth: ProviderAuthResponse
   config: Config
@@ -87,12 +91,27 @@ function createGlobalSync() {
     ready: false,
     path: { state: "", config: "", worktree: "", directory: "", home: "" },
     project: projectCache.value,
+    session_todo: {},
     provider: { all: [], connected: [], default: {} },
     provider_auth: {},
     config: {},
     reload: undefined,
   })
 
+  const setSessionTodo = (sessionID: string, todos: Todo[] | undefined) => {
+    if (!sessionID) return
+    if (!todos) {
+      setGlobalStore(
+        "session_todo",
+        produce((draft) => {
+          delete draft[sessionID]
+        }),
+      )
+      return
+    }
+    setGlobalStore("session_todo", sessionID, reconcile(todos, { key: "id" }))
+  }
+
   const updateStats = (activeDirectoryStores: number) => {
     if (!import.meta.env.DEV) return
     setDevStats({
@@ -288,6 +307,7 @@ function createGlobalSync() {
       store,
       setStore,
       push: queue.push,
+      setSessionTodo,
       vcsCache: children.vcsCache.get(directory),
       loadLsp: () => {
         sdkFor(directory)
@@ -358,6 +378,9 @@ function createGlobalSync() {
     bootstrap,
     updateConfig,
     project: projectApi,
+    todo: {
+      set: setSessionTodo,
+    },
   }
 }
 
diff --git a/packages/app/src/context/global-sync/bootstrap.ts b/packages/app/src/context/global-sync/bootstrap.ts
index 2137a19a8..478bc02f5 100644
--- a/packages/app/src/context/global-sync/bootstrap.ts
+++ b/packages/app/src/context/global-sync/bootstrap.ts
@@ -6,6 +6,7 @@ import {
   type ProviderAuthResponse,
   type ProviderListResponse,
   type QuestionRequest,
+  type Todo,
   createOpencodeClient,
 } from "@opencode-ai/sdk/v2/client"
 import { batch } from "solid-js"
@@ -20,6 +21,9 @@ type GlobalStore = {
   ready: boolean
   path: Path
   project: Project[]
+  session_todo: {
+    [sessionID: string]: Todo[]
+  }
   provider: ProviderListResponse
   provider_auth: ProviderAuthResponse
   config: Config
diff --git a/packages/app/src/context/global-sync/event-reducer.ts b/packages/app/src/context/global-sync/event-reducer.ts
index 48ac0fea1..241dfb14d 100644
--- a/packages/app/src/context/global-sync/event-reducer.ts
+++ b/packages/app/src/context/global-sync/event-reducer.ts
@@ -39,7 +39,12 @@ export function applyGlobalEvent(input: {
   })
 }
 
-function cleanupSessionCaches(store: Store<State>, setStore: SetStoreFunction<State>, sessionID: string) {
+function cleanupSessionCaches(
+  store: Store<State>,
+  setStore: SetStoreFunction<State>,
+  sessionID: string,
+  setSessionTodo?: (sessionID: string, todos: Todo[] | undefined) => void,
+) {
   if (!sessionID) return
   const hasAny =
     store.message[sessionID] !== undefined ||
@@ -48,6 +53,7 @@ function cleanupSessionCaches(store: Store<State>, setStore: SetStoreFunction<St
     store.permission[sessionID] !== undefined ||
     store.question[sessionID] !== undefined ||
     store.session_status[sessionID] !== undefined
+  setSessionTodo?.(sessionID, undefined)
   if (!hasAny) return
   setStore(
     produce((draft) => {
@@ -77,6 +83,7 @@ export function applyDirectoryEvent(input: {
   directory: string
   loadLsp: () => void
   vcsCache?: VcsCache
+  setSessionTodo?: (sessionID: string, todos: Todo[] | undefined) => void
 }) {
   const event = input.event
   switch (event.type) {
@@ -110,7 +117,7 @@ export function applyDirectoryEvent(input: {
             }),
           )
         }
-        cleanupSessionCaches(input.store, input.setStore, info.id)
+        cleanupSessionCaches(input.store, input.setStore, info.id, input.setSessionTodo)
         if (info.parentID) break
         input.setStore("sessionTotal", (value) => Math.max(0, value - 1))
         break
@@ -136,7 +143,7 @@ export function applyDirectoryEvent(input: {
           }),
         )
       }
-      cleanupSessionCaches(input.store, input.setStore, info.id)
+      cleanupSessionCaches(input.store, input.setStore, info.id, input.setSessionTodo)
       if (info.parentID) break
       input.setStore("sessionTotal", (value) => Math.max(0, value - 1))
       break
@@ -149,6 +156,7 @@ export function applyDirectoryEvent(input: {
     case "todo.updated": {
       const props = event.properties as { sessionID: string; todos: Todo[] }
       input.setStore("todo", props.sessionID, reconcile(props.todos, { key: "id" }))
+      input.setSessionTodo?.(props.sessionID, props.todos)
       break
     }
     case "session.status": {
diff --git a/packages/app/src/context/sync.tsx b/packages/app/src/context/sync.tsx
index e5916598b..60888b1a6 100644
--- a/packages/app/src/context/sync.tsx
+++ b/packages/app/src/context/sync.tsx
@@ -289,12 +289,25 @@ export const { use: useSync, provider: SyncProvider } = createSimpleContext({
           const directory = sdk.directory
           const client = sdk.client
           const [store, setStore] = globalSync.child(directory)
-          if (store.todo[sessionID] !== undefined) return
+          const existing = store.todo[sessionID]
+          if (existing !== undefined) {
+            if (globalSync.data.session_todo[sessionID] === undefined) {
+              globalSync.todo.set(sessionID, existing)
+            }
+            return
+          }
+
+          const cached = globalSync.data.session_todo[sessionID]
+          if (cached !== undefined) {
+            setStore("todo", sessionID, reconcile(cached, { key: "id" }))
+          }
 
           const key = keyFor(directory, sessionID)
           return runInflight(inflightTodo, key, () =>
             retry(() => client.session.todo({ sessionID })).then((todo) => {
-              setStore("todo", sessionID, reconcile(todo.data ?? [], { key: "id" }))
+              const list = todo.data ?? []
+              setStore("todo", sessionID, reconcile(list, { key: "id" }))
+              globalSync.todo.set(sessionID, list)
             }),
           )
         },