diff --git a/extensions/matrix/src/matrix/monitor/inbound-body.test.ts b/extensions/matrix/src/matrix/monitor/inbound-body.test.ts
deleted file mode 100644
index 8b5c63c89a9..00000000000
--- a/extensions/matrix/src/matrix/monitor/inbound-body.test.ts
+++ /dev/null
@@ -1,73 +0,0 @@
-import { describe, expect, it } from "vitest";
-import {
-  resolveMatrixBodyForAgent,
-  resolveMatrixInboundSenderLabel,
-  resolveMatrixSenderUsername,
-} from "./inbound-body.js";
-
-describe("resolveMatrixSenderUsername", () => {
-  it("extracts localpart without leading @", () => {
-    expect(resolveMatrixSenderUsername("@bu:matrix.example.org")).toBe("bu");
-  });
-});
-
-describe("resolveMatrixInboundSenderLabel", () => {
-  it("uses provided senderUsername when present", () => {
-    expect(
-      resolveMatrixInboundSenderLabel({
-        senderName: "Bu",
-        senderId: "@bu:matrix.example.org",
-        senderUsername: "BU_CUSTOM",
-      }),
-    ).toBe("Bu (BU_CUSTOM)");
-  });
-
-  it("includes sender username when it differs from display name", () => {
-    expect(
-      resolveMatrixInboundSenderLabel({
-        senderName: "Bu",
-        senderId: "@bu:matrix.example.org",
-      }),
-    ).toBe("Bu (bu)");
-  });
-
-  it("falls back to sender username when display name is blank", () => {
-    expect(
-      resolveMatrixInboundSenderLabel({
-        senderName: " ",
-        senderId: "@zhang:matrix.example.org",
-      }),
-    ).toBe("zhang");
-  });
-
-  it("falls back to sender id when username cannot be parsed", () => {
-    expect(
-      resolveMatrixInboundSenderLabel({
-        senderName: "",
-        senderId: "matrix-user-without-colon",
-      }),
-    ).toBe("matrix-user-without-colon");
-  });
-});
-
-describe("resolveMatrixBodyForAgent", () => {
-  it("keeps direct message body unchanged", () => {
-    expect(
-      resolveMatrixBodyForAgent({
-        isDirectMessage: true,
-        bodyText: "show me my commits",
-        senderLabel: "Bu (bu)",
-      }),
-    ).toBe("show me my commits");
-  });
-
-  it("prefixes non-direct message body with sender label", () => {
-    expect(
-      resolveMatrixBodyForAgent({
-        isDirectMessage: false,
-        bodyText: "show me my commits",
-        senderLabel: "Bu (bu)",
-      }),
-    ).toBe("Bu (bu): show me my commits");
-  });
-});
diff --git a/extensions/matrix/src/matrix/monitor/inbound-body.ts b/extensions/matrix/src/matrix/monitor/inbound-body.ts
deleted file mode 100644
index 48ad8d31e79..00000000000
--- a/extensions/matrix/src/matrix/monitor/inbound-body.ts
+++ /dev/null
@@ -1,28 +0,0 @@
-export function resolveMatrixSenderUsername(senderId: string): string | undefined {
-  const username = senderId.split(":")[0]?.replace(/^@/, "").trim();
-  return username ? username : undefined;
-}
-
-export function resolveMatrixInboundSenderLabel(params: {
-  senderName: string;
-  senderId: string;
-  senderUsername?: string;
-}): string {
-  const senderName = params.senderName.trim();
-  const senderUsername = params.senderUsername ?? resolveMatrixSenderUsername(params.senderId);
-  if (senderName && senderUsername && senderName !== senderUsername) {
-    return `${senderName} (${senderUsername})`;
-  }
-  return senderName || senderUsername || params.senderId;
-}
-
-export function resolveMatrixBodyForAgent(params: {
-  isDirectMessage: boolean;
-  bodyText: string;
-  senderLabel: string;
-}): string {
-  if (params.isDirectMessage) {
-    return params.bodyText;
-  }
-  return `${params.senderLabel}: ${params.bodyText}`;
-}