feat: migrate tool callers to SDK message finders on SQLite backend

src/tools/delegate-task/parent-context-resolver.ts

@@ -1,14 +1,33 @@
 import type { ToolContextWithMetadata } from "./types"
+import type { OpencodeClient } from "./types"
 import type { ParentContext } from "./executor-types"
-import { findNearestMessageWithFields, findFirstMessageWithAgent } from "../../features/hook-message-injector"
+import {
+  findFirstMessageWithAgent,
+  findFirstMessageWithAgentFromSDK,
+  findNearestMessageWithFields,
+  findNearestMessageWithFieldsFromSDK,
+} from "../../features/hook-message-injector"
 import { getSessionAgent } from "../../features/claude-code-session-state"
 import { log } from "../../shared/logger"
-import { getMessageDir } from "../../shared"
+import { getMessageDir } from "../../shared/opencode-message-dir"
+import { isSqliteBackend } from "../../shared/opencode-storage-detection"
 
-export function resolveParentContext(ctx: ToolContextWithMetadata): ParentContext {
+export async function resolveParentContext(
+  ctx: ToolContextWithMetadata,
+  client: OpencodeClient
+): Promise<ParentContext> {
   const messageDir = getMessageDir(ctx.sessionID)
-  const prevMessage = messageDir ? findNearestMessageWithFields(messageDir) : null
-  const firstMessageAgent = messageDir ? findFirstMessageWithAgent(messageDir) : null
+
+  const [prevMessage, firstMessageAgent] = isSqliteBackend()
+    ? await Promise.all([
+        findNearestMessageWithFieldsFromSDK(client, ctx.sessionID),
+        findFirstMessageWithAgentFromSDK(client, ctx.sessionID),
+      ])
+    : [
+        messageDir ? findNearestMessageWithFields(messageDir) : null,
+        messageDir ? findFirstMessageWithAgent(messageDir) : null,
+      ]
+
   const sessionAgent = getSessionAgent(ctx.sessionID)
   const parentAgent = ctx.agent ?? sessionAgent ?? firstMessageAgent ?? prevMessage?.agent
 

src/tools/delegate-task/tools.ts

@@ -129,7 +129,7 @@ Prompts MUST be in English.`
         return skillError
       }
 
-      const parentContext = resolveParentContext(ctx)
+      const parentContext = await resolveParentContext(ctx, options.client)
 
       if (args.session_id) {
         if (runInBackground) {