feat: migrate call-omo-agent tool callers to SDK message finders

src/tools/call-omo-agent/background-agent-executor.ts

@@ -1,21 +1,38 @@
 import type { BackgroundManager } from "../../features/background-agent"
-import { findFirstMessageWithAgent, findNearestMessageWithFields } from "../../features/hook-message-injector"
+import type { PluginInput } from "@opencode-ai/plugin"
+import {
+  findFirstMessageWithAgent,
+  findFirstMessageWithAgentFromSDK,
+  findNearestMessageWithFields,
+  findNearestMessageWithFieldsFromSDK,
+} from "../../features/hook-message-injector"
 import { getSessionAgent } from "../../features/claude-code-session-state"
 import { log } from "../../shared"
 import type { CallOmoAgentArgs } from "./types"
 import type { ToolContextWithMetadata } from "./tool-context-with-metadata"
 import { getMessageDir } from "./message-storage-directory"
 import { getSessionTools } from "../../shared/session-tools-store"
+import { isSqliteBackend } from "../../shared/opencode-storage-detection"
 
 export async function executeBackgroundAgent(
 	args: CallOmoAgentArgs,
 	toolContext: ToolContextWithMetadata,
 	manager: BackgroundManager,
+	client: PluginInput["client"],
 ): Promise<string> {
 	try {
 		const messageDir = getMessageDir(toolContext.sessionID)
-		const prevMessage = messageDir ? findNearestMessageWithFields(messageDir) : null
-		const firstMessageAgent = messageDir ? findFirstMessageWithAgent(messageDir) : null
+
+		const [prevMessage, firstMessageAgent] = isSqliteBackend()
+			? await Promise.all([
+					findNearestMessageWithFieldsFromSDK(client, toolContext.sessionID),
+					findFirstMessageWithAgentFromSDK(client, toolContext.sessionID),
+				])
+			: [
+					messageDir ? findNearestMessageWithFields(messageDir) : null,
+					messageDir ? findFirstMessageWithAgent(messageDir) : null,
+				]
+
 		const sessionAgent = getSessionAgent(toolContext.sessionID)
 		const parentAgent =
 			toolContext.agent ?? sessionAgent ?? firstMessageAgent ?? prevMessage?.agent