fix: resolve #3124 #3125 #3127 session tools, cache priming, and compaction loop

- #3124: Session tools now merge SDK and file-backed sessions for SQLite backend
- #3125: Cache priming fixed for OpenCode >=1.3.14 empty workspace
- #3127: Activity-based progress detection prevents infinite compaction on Kimi/Minimax

All 29 new tests pass, 4885 total tests passing.

src/tools/session-manager/storage.ts

@@ -9,6 +9,27 @@ export interface GetMainSessionsOptions {
   directory?: string
 }
 
+function mergeSessionMetadataLists(
+  sdkSessions: SessionMetadata[],
+  fileSessions: SessionMetadata[],
+): SessionMetadata[] {
+  const merged = new Map<string, SessionMetadata>()
+
+  for (const session of fileSessions) {
+    merged.set(session.id, session)
+  }
+
+  for (const session of sdkSessions) {
+    merged.set(session.id, session)
+  }
+
+  return [...merged.values()].sort((a, b) => b.time.updated - a.time.updated)
+}
+
+function mergeSessionIds(sdkSessionIds: string[], fileSessionIds: string[]): string[] {
+  return [...new Set([...sdkSessionIds, ...fileSessionIds])]
+}
+
 // SDK client reference for beta mode
 let sdkClient: PluginInput["client"] | null = null
 
@@ -23,7 +44,9 @@ export function resetStorageClient(): void {
 export async function getMainSessions(options: GetMainSessionsOptions): Promise<SessionMetadata[]> {
   if (isSqliteBackend() && sdkClient) {
     try {
-      return await getSdkMainSessions(sdkClient, options.directory)
+      const sdkSessions = await getSdkMainSessions(sdkClient, options.directory)
+      const fileSessions = await getFileMainSessions(options.directory)
+      return mergeSessionMetadataLists(sdkSessions, fileSessions)
     } catch (error) {
       if (!shouldFallbackFromSdkError(error)) throw error
       log("[session-manager] falling back to file session list after SDK unavailable error", { error: String(error) })
@@ -36,7 +59,9 @@ export async function getMainSessions(options: GetMainSessionsOptions): Promise<
 export async function getAllSessions(): Promise<string[]> {
   if (isSqliteBackend() && sdkClient) {
     try {
-      return await getSdkAllSessions(sdkClient)
+      const sdkSessionIds = await getSdkAllSessions(sdkClient)
+      const fileSessionIds = await getFileAllSessions()
+      return mergeSessionIds(sdkSessionIds, fileSessionIds)
     } catch (error) {
       if (!shouldFallbackFromSdkError(error)) throw error
       log("[session-manager] falling back to file session ids after SDK unavailable error", { error: String(error) })
@@ -51,7 +76,8 @@ export { getMessageDir } from "../../shared/opencode-message-dir"
 export async function sessionExists(sessionID: string): Promise<boolean> {
   if (isSqliteBackend() && sdkClient) {
     try {
-      return await sdkSessionExists(sdkClient, sessionID)
+      const existsInSdk = await sdkSessionExists(sdkClient, sessionID)
+      if (existsInSdk) return true
     } catch (error) {
       if (!shouldFallbackFromSdkError(error)) throw error
       log("[session-manager] falling back to file sessionExists after SDK unavailable error", { error: String(error), sessionID })
@@ -63,7 +89,8 @@ export async function sessionExists(sessionID: string): Promise<boolean> {
 export async function readSessionMessages(sessionID: string): Promise<SessionMessage[]> {
   if (isSqliteBackend() && sdkClient) {
     try {
-      return await getSdkSessionMessages(sdkClient, sessionID)
+      const sdkMessages = await getSdkSessionMessages(sdkClient, sessionID)
+      if (sdkMessages.length > 0) return sdkMessages
     } catch (error) {
       if (!shouldFallbackFromSdkError(error)) throw error
       log("[session-manager] falling back to file session messages after SDK unavailable error", { error: String(error), sessionID })
@@ -76,7 +103,8 @@ export async function readSessionMessages(sessionID: string): Promise<SessionMes
 export async function readSessionTodos(sessionID: string): Promise<TodoItem[]> {
   if (isSqliteBackend() && sdkClient) {
     try {
-      return await getSdkSessionTodos(sdkClient, sessionID)
+      const sdkTodos = await getSdkSessionTodos(sdkClient, sessionID)
+      if (sdkTodos.length > 0) return sdkTodos
     } catch (error) {
       if (!shouldFallbackFromSdkError(error)) throw error
       log("[session-manager] falling back to file session todos after SDK unavailable error", { error: String(error), sessionID })