feat(client): surface pending session interactions

packages/client/runtime/src/client/index.ts

@@ -59,7 +59,9 @@ export type {
 export type { ConversationHistoryProjection } from './session-history/history-fold.ts'
 export type { SessionHistoryInspection } from './sessions/history.ts'
 export { PendingWait } from './sessions/pending.ts'
-export type { PendingInteraction, PendingKind, PendingPayloads } from './sessions/pending.ts'
+export type {
+  PendingInteraction, PendingInteractionStatus, PendingKind, PendingPayloads,
+} from './sessions/pending.ts'
 // Projection value store (session-projection RFC, push model): host-computed
 // whole values per key; domains ship projection support with zero client code.
 export type {

packages/client/runtime/src/client/sessions/lineage.ts

@@ -4,6 +4,7 @@
 
 import type { SessionId, SessionSummary } from '@deepseek-ai/dsh-client-connection/client'
 import type { SessionProjectionMap } from '@deepseek-ai/dsh-session-projection/types'
+import type { PendingInteractionStatus } from './pending.ts'
 
 /** Host list summary enriched with the latest mux-projected durable title. */
 export interface TitledSessionSummary extends SessionSummary {
@@ -12,7 +13,7 @@ export interface TitledSessionSummary extends SessionSummary {
   projectionValues?: Readonly<Partial<SessionProjectionMap>>
 }
 
-/** One flattened session-list row (summary + lineage indent depth + live pending-approval bit). */
+/** One flattened session-list row with lineage depth and live pending interaction. */
 export interface SessionListEntry {
   sessionId: SessionId
   title?: string
@@ -26,8 +27,8 @@ export interface SessionListEntry {
   cwd?: string
   /** Current host-computed projection values for list consumers. */
   projectionValues?: Readonly<Partial<SessionProjectionMap>>
-  /** An approval question is pending on this session (mux-frame derived; the sidebar's amber dot). */
-  waitingApproval: boolean
+  /** User interaction currently blocking this session, derived from live mux frames. */
+  pendingInteraction?: PendingInteractionStatus
   /** Lineage indent depth: root = 0; the UI just multiplies by the indent width. */
   depth: number
 }
@@ -37,10 +38,13 @@ export interface SessionListEntry {
  * follows the established input order; this projection never re-sorts a
  * hydrated list from mutable timestamps.
  * @param summaries - the host's session.list items.
- * @param waitingApproval - sessions with a pending approval question (manager-owned live fact; absent = false).
+ * @param pendingInteractions - current manager-owned interaction status by session.
  * @returns display rows in render order.
  */
-export function flattenLineage(summaries: readonly TitledSessionSummary[], waitingApproval?: ReadonlySet<SessionId>): SessionListEntry[] {
+export function flattenLineage(
+  summaries: readonly TitledSessionSummary[],
+  pendingInteractions?: ReadonlyMap<SessionId, PendingInteractionStatus>,
+): SessionListEntry[] {
   const byId = new Map<SessionId, TitledSessionSummary>()
   for (const s of summaries) byId.set(s.sessionId, s)
 
@@ -64,7 +68,12 @@ export function flattenLineage(summaries: readonly TitledSessionSummary[], waiti
       return
     }
     visited.add(s.sessionId)
-    out.push({ ...s, waitingApproval: waitingApproval?.has(s.sessionId) ?? false, depth })
+    const pendingInteraction = pendingInteractions?.get(s.sessionId)
+    out.push({
+      ...s,
+      ...(pendingInteraction === undefined ? {} : { pendingInteraction }),
+      depth,
+    })
     const kids = children.get(s.sessionId)
     if (kids === undefined) return
     for (const kid of kids) walk(kid, depth + 1)

packages/client/runtime/src/client/sessions/manager.ts

@@ -12,6 +12,7 @@ import { transportError } from '@deepseek-ai/dsh-host-apiproxy/api'
 import { mergeOrderedBaseline } from '../ordered-baseline.ts'
 import type { SessionListEntry, TitledSessionSummary } from './lineage.ts'
 import { flattenLineage } from './lineage.ts'
+import type { PendingInteractionStatus } from './pending.ts'
 // Type-only merge edge: the title domain's client-namespace outlet declares
 // the 'title' projection key this manager projects into list rows (and any
 // useProjection('title') consumer reads). Zero value imports by construction.
@@ -70,23 +71,30 @@ type SessionListMutation =
   /** Local first-send flip: the sender clears blank without waiting for a host frame. */
   | { kind: 'engaged'; sessionId: SessionId }
 
-/** Per-session cap for pre-instantiation approval/question buffering (low-frequency frames; a few dozen covers any real backlog). */
-const PENDING_BUFFER_CAP = 32
+/** Stable identity of a frame retained until an uninstantiated Session can consume it. */
+function bufferedRequestKey(envelope: RpcRequest<MuxFrame>): string | undefined {
+  const frame = envelope.payload
+  switch (frame.type) {
+    case 'approval/requested': return `a:${frame.approvalId}`
+    case 'question/requested': return `q:${envelope.rpcId}`
+    case 'session/queue': return 'queue'
+    default: return undefined
+  }
+}
 
 
 /** Instance cluster + frame entry + the session list (see the web client architecture RFC). */
 export class SessionManager {
   private readonly sessions = new Map<SessionId, Session>()
-  /** Approval/question frame buffer for uninstantiated sessions: pending interactions never hit
-   *  history (cannot be backfilled on open), the one frame class that must not take the
-   *  drop-and-backfill path; replayed and cleared on instantiation. Bounded per session (these
-   *  frames are low-frequency; overflow drops oldest) and dropped on session-removed (audit S7). */
+  /** Pre-instantiation buffer for answerable requests and the queued-turn snapshot, which history
+   *  cannot reconstruct on open. Live requests remain until resolution; queue and replay duplicates
+   *  compact by identity. Instantiation replays and clears it, while removal drops it (audit S7). */
   private readonly pendingBuffers = new Map<SessionId, RpcRequest<MuxFrame>[]>()
-  /** Outstanding approval questions per session, keyed by approvalId (idempotent under mux-open
-   *  replays of the same requested frame). Manager-owned rather than read off Session instances
-   *  because the sidebar must light up for sessions never instantiated. Cleared per connection
-   *  generation — the reopen replay re-adds still-pending questions — and on session-removed. */
-  private readonly waitingApprovals = new Map<SessionId, Set<string>>()
+  /** Outstanding answerable interactions per session, keyed by their stable request identity.
+   *  Manager-owned rather than read off Session instances because the sidebar must light up for
+   *  sessions never instantiated. Cleared per connection generation — the reopen replay re-adds
+   *  still-pending requests — and on session-removed. */
+  private readonly pendingInteractions = new Map<SessionId, Map<string, PendingInteractionStatus>>()
   /** Per-session projection value stores, retained independently of instance arrival (the
    *  title-snapshot precedent, generalized): push frames land here whether or not the Session
    *  is instantiated (list rows read the 'title' key), and an instantiated Session adopts the
@@ -567,6 +575,26 @@ export class SessionManager {
     return this.listSnapshotCache
   }
 
+  /** Add or refresh one stable pending-interaction identity. */
+  private trackPending(sessionId: SessionId, key: string, status: PendingInteractionStatus): void {
+    let interactions = this.pendingInteractions.get(sessionId)
+    if (interactions === undefined) {
+      interactions = new Map()
+      this.pendingInteractions.set(sessionId, interactions)
+    }
+    if (interactions.get(key) === status) return
+    interactions.set(key, status)
+    this.notifier.markDirty()
+  }
+
+  /** Settle one pending-interaction identity without disturbing sibling waits. */
+  private resolvePending(sessionId: SessionId, key: string): void {
+    const interactions = this.pendingInteractions.get(sessionId)
+    if (interactions === undefined || !interactions.delete(key)) return
+    if (interactions.size === 0) this.pendingInteractions.delete(sessionId)
+    this.notifier.markDirty()
+  }
+
   // ---- ConnectionController sinks (wired by boot) ----
 
   /**
@@ -606,43 +634,56 @@ export class SessionManager {
         }
       }
     }
-    // List-level waiting-approval bit (the sidebar amber dot): tracked here for
-    // every session, instantiated or not; approvalId keys make replays idempotent.
+    // List-level pending-interaction status (the sidebar amber dot): tracked
+    // for every session, instantiated or not; stable keys make replays idempotent.
     if (frame.type === 'approval/requested') {
-      let ids = this.waitingApprovals.get(frame.sessionId)
-      if (ids === undefined) this.waitingApprovals.set(frame.sessionId, ids = new Set())
-      if (!ids.has(frame.approvalId)) {
-        ids.add(frame.approvalId)
-        this.notifier.markDirty()
-      }
+      this.trackPending(frame.sessionId, `a:${frame.approvalId}`, 'approval')
     } else if (frame.type === 'approval/resolved') {
-      const ids = this.waitingApprovals.get(frame.sessionId)
-      if (ids !== undefined && ids.delete(frame.approvalId)) {
-        if (ids.size === 0) this.waitingApprovals.delete(frame.sessionId)
-        this.notifier.markDirty()
-      }
+      this.resolvePending(frame.sessionId, `a:${frame.approvalId}`)
+    } else if (frame.type === 'question/requested') {
+      this.trackPending(
+        frame.sessionId,
+        `q:${envelope.rpcId}`,
+        frame.questions.length === 1 && frame.questions[0]?.intent?.kind === 'plan-review'
+          ? 'plan-review'
+          : 'question',
+      )
+    } else if (frame.type === 'question/resolved') {
+      this.resolvePending(frame.sessionId, `q:${frame.questionRpcId}`)
     }
     const session = this.sessions.get(frame.sessionId)
     if (session === undefined) {
-      // Approval/question/queue frames never hit history: buffer for replay on
-      // instantiation; everything else drops (not instantiated — history fully
-      // backfills on open).
+      // Answerable requests never hit history: retain each live identity until
+      // instantiation, compacting replay duplicates and resolutions so list
+      // status cannot outlive the PendingWait the user would need to answer.
+      // Queue is a latest-value snapshot; everything else drops because open
+      // backfills it from history.
       switch (frame.type) {
         case 'approval/requested':
-        case 'approval/resolved':
         case 'question/requested':
-        case 'question/resolved':
         case 'session/queue': {
           const buffer = this.pendingBuffers.get(frame.sessionId) ?? []
-          const prior = frame.type === 'session/queue'
-            ? buffer.findIndex(item => item.payload.type === 'session/queue')
-            : -1
-          if (prior !== -1) buffer.splice(prior, 1)
-          buffer.push(envelope)
-          if (buffer.length > PENDING_BUFFER_CAP) buffer.splice(0, buffer.length - PENDING_BUFFER_CAP)
+          const key = frame.type === 'approval/requested'
+            ? `a:${frame.approvalId}`
+            : frame.type === 'question/requested' ? `q:${envelope.rpcId}` : 'queue'
+          const prior = buffer.findIndex(item => bufferedRequestKey(item) === key)
+          if (prior === -1) buffer.push(envelope)
+          else buffer[prior] = envelope
           this.pendingBuffers.set(frame.sessionId, buffer)
           return
         }
+        case 'approval/resolved':
+        case 'question/resolved': {
+          const buffer = this.pendingBuffers.get(frame.sessionId)
+          if (buffer === undefined) return
+          const key = frame.type === 'approval/resolved'
+            ? `a:${frame.approvalId}`
+            : `q:${frame.questionRpcId}`
+          const prior = buffer.findIndex(item => bufferedRequestKey(item) === key)
+          if (prior !== -1) buffer.splice(prior, 1)
+          if (buffer.length === 0) this.pendingBuffers.delete(frame.sessionId)
+          return
+        }
         default:
           return
       }
@@ -689,7 +730,7 @@ export class SessionManager {
           this.sessions.get(frame.sessionId)?.handleRemoved()
         }
         this.pendingBuffers.delete(frame.sessionId) // a removed session's buffered frames must not replay on a future instantiation
-        this.waitingApprovals.delete(frame.sessionId) // a removed session cannot wait on anyone
+        this.pendingInteractions.delete(frame.sessionId) // a removed session cannot wait on anyone
         if (!durableSubagent) this.projectionStores.delete(frame.sessionId)
         // A pull already in flight was requested before this removal and can
         // carry the pre-removal parentAvailable:true, which would resurrect
@@ -735,14 +776,14 @@ export class SessionManager {
    * The moment a connection generation dies (before any next-generation frame
    * can arrive — onConnected waits for the readiness handshake while replayed
    * frames flow from stream open, so clearing there would race the replay):
-   * drop generation-scoped live state. Approvals resolved while disconnected
-   * send no frame, so the stale bits and the buffered answerable frames must
-   * not survive into the next generation — the mux-open replay re-adds every
-   * still-pending question with its live rpcId.
+   * drop generation-scoped live state. Interactions resolved while disconnected
+   * send no frame, so stale statuses and buffered answerable frames must not
+   * survive into the next generation — mux-open replay re-adds every still-pending
+   * request with its live rpcId.
    */
   handleDisconnected(): void {
-    if (this.waitingApprovals.size > 0) {
-      this.waitingApprovals.clear()
+    if (this.pendingInteractions.size > 0) {
+      this.pendingInteractions.clear()
       this.notifier.markDirty()
     }
     for (const [sessionId, buffer] of [...this.pendingBuffers]) {
@@ -855,7 +896,15 @@ export class SessionManager {
         ...(projectionValues === undefined ? {} : { projectionValues }),
       }
     })
-    const fresh = flattenLineage(merged, new Set(this.waitingApprovals.keys()))
+    const pendingInteractions = new Map<SessionId, PendingInteractionStatus>()
+    for (const [sessionId, interactions] of this.pendingInteractions) {
+      const statuses = [...interactions.values()]
+      // The composer selects the first question ahead of approval. Mirror that
+      // answer order so the sidebar names the interaction the user can act on.
+      const status = statuses.find(candidate => candidate !== 'approval') ?? statuses[0]
+      if (status !== undefined) pendingInteractions.set(sessionId, status)
+    }
+    const fresh = flattenLineage(merged, pendingInteractions)
     const items = fresh.map((entry) => {
       const prev = this.entryCache.get(entry.sessionId)
       if (
@@ -863,7 +912,7 @@ export class SessionManager {
         && prev.blank === entry.blank
         && prev.parentSessionId === entry.parentSessionId && prev.cwd === entry.cwd
         && prev.origin === entry.origin && prev.title === entry.title && prev.depth === entry.depth
-        && prev.waitingApproval === entry.waitingApproval
+        && prev.pendingInteraction === entry.pendingInteraction
         && prev.projectionValues === entry.projectionValues
       ) return prev
       this.entryCache.set(entry.sessionId, entry)

packages/client/runtime/src/client/sessions/pending.ts

@@ -15,6 +15,9 @@ export interface PendingPayloads {
 /** Pending-interaction discriminant (the keys of PendingPayloads). */
 export type PendingKind = keyof PendingPayloads
 
+/** Session-list summary of the user action currently blocking progress. */
+export type PendingInteractionStatus = 'approval' | 'plan-review' | 'question'
+
 /** Kind-discriminated union of concrete waits: narrowing on `kind` types `payload`. */
 export type PendingInteraction = { [K in PendingKind]: PendingWait<K> }[PendingKind]
 

packages/client/runtime/src/client/sessions/service.ts

@@ -33,6 +33,7 @@ import type { ISessions } from '../contract/sessions.ts'
 import { createScope, scopeOf as scopeTagOf } from '../agents/scope.ts'
 import { SessionManager } from './manager.ts'
 import type { SessionListPhase, SessionSearchResultItem, SubagentCatalogSnapshot } from './manager.ts'
+import type { PendingInteractionStatus } from './pending.ts'
 import { SessionProvideChannel } from './provide.ts'
 import type { Session } from './session.ts'
 
@@ -48,8 +49,8 @@ export interface SessionSummary {
   /** Coarse durable origin for navigation filtering; not a continuation capability. */
   origin?: 'subagent'
   running: boolean
-  /** An approval question is pending on this session (sidebar amber-dot state). */
-  waitingApproval: boolean
+  /** User interaction currently blocking this session (sidebar amber-dot state). */
+  pendingInteraction?: PendingInteractionStatus
   /**
    * Empty-log bit (host summary derivation mirror). New Session reuses a blank
    * one targeting the same workspace. Filtering stays with the consumer: the
@@ -613,9 +614,11 @@ export class SessionsService implements ISessions {
         id: entry.sessionId,
         displayTitle: displayTitleOf(entry.title, entry.cwd, entry.sessionId),
         running: entry.running,
-        waitingApproval: entry.waitingApproval,
         blank: entry.blank,
         updatedAt: entry.updatedAt,
+        ...(entry.pendingInteraction === undefined
+          ? {}
+          : { pendingInteraction: entry.pendingInteraction }),
         ...(entry.projectionValues === undefined
           ? {}
           : { projectionValues: entry.projectionValues }),
@@ -643,7 +646,6 @@ export class SessionsService implements ISessions {
             parentId: address.parentSessionId,
             origin: 'subagent',
             running: child.activity === 'running',
-            waitingApproval: false,
             blank: false,
             updatedAt: 0,
           }