diff --git a/src/hooks/ralph-loop/continuation-prompt-injector.ts b/src/hooks/ralph-loop/continuation-prompt-injector.ts
index 759c75bd..46574be8 100644
--- a/src/hooks/ralph-loop/continuation-prompt-injector.ts
+++ b/src/hooks/ralph-loop/continuation-prompt-injector.ts
@@ -30,9 +30,9 @@ export async function injectContinuationPrompt(
 	let agent: string | undefined
 	let model: { providerID: string; modelID: string } | undefined
 	let tools: Record<string, boolean | "allow" | "deny" | "ask"> | undefined
+	const sourceSessionID = options.inheritFromSessionID ?? options.sessionID
 
 	try {
-		const sourceSessionID = options.inheritFromSessionID ?? options.sessionID
 		const messagesResp = await withTimeout(
 			ctx.client.session.messages({
 				path: { id: sourceSessionID },
@@ -54,7 +54,7 @@ export async function injectContinuationPrompt(
 			}
 		}
 	} catch {
-		const messageDir = getMessageDir(options.sessionID)
+		const messageDir = getMessageDir(sourceSessionID)
 		const currentMessage = messageDir ? findNearestMessageWithFields(messageDir) : null
 		agent = currentMessage?.agent
 		model =
diff --git a/src/hooks/ralph-loop/session-reset-strategy.ts b/src/hooks/ralph-loop/session-reset-strategy.ts
index b581100b..b4d80859 100644
--- a/src/hooks/ralph-loop/session-reset-strategy.ts
+++ b/src/hooks/ralph-loop/session-reset-strategy.ts
@@ -1,6 +1,5 @@
 import type { PluginInput } from "@opencode-ai/plugin"
-import { getServerBasicAuthHeader } from "../../shared/opencode-server-auth"
-import { getServerBaseUrl, log } from "../../shared"
+import { log } from "../../shared"
 
 export async function createIterationSession(
   ctx: PluginInput,
@@ -30,36 +29,44 @@ export async function selectSessionInTui(
   client: PluginInput["client"],
   sessionID: string,
 ): Promise<boolean> {
-  const baseUrl = getServerBaseUrl(client)
-  const authorization = getServerBasicAuthHeader()
-
-  if (!baseUrl || !authorization) {
+  const selectSession = getSelectSessionApi(client)
+  if (!selectSession) {
     return false
   }
 
-  const response = await fetch(`${baseUrl}/tui/select-session`, {
-    method: "POST",
-    headers: {
-      "Content-Type": "application/json",
-      Authorization: authorization,
-    },
-    body: JSON.stringify({ sessionID }),
-    signal: AbortSignal.timeout(5000),
-  }).catch((error: unknown) => {
+  try {
+    await selectSession({ body: { sessionID } })
+    return true
+  } catch (error: unknown) {
     log("[ralph-loop] Failed to select session in TUI", {
       sessionID,
       error: String(error),
     })
-    return null
-  })
-
-  if (!response?.ok) {
-    log("[ralph-loop] TUI session select request failed", {
-      sessionID,
-      status: response?.status,
-    })
     return false
   }
-
-  return true
+}
+
+type SelectSessionApi = (args: { body: { sessionID: string } }) => Promise<unknown>
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null
+}
+
+function getSelectSessionApi(client: unknown): SelectSessionApi | null {
+  if (!isRecord(client)) {
+    return null
+  }
+
+  const clientRecord = client
+  const tuiValue = clientRecord.tui
+  if (!isRecord(tuiValue)) {
+    return null
+  }
+
+  const selectSessionValue = tuiValue.selectSession
+  if (typeof selectSessionValue !== "function") {
+    return null
+  }
+
+  return selectSessionValue as SelectSessionApi
 }